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JANUARY/FEBRUARY 2026 |
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PROGRAM |
BACHELOR OF COMPUTER APPLICATIONS (BCA) |
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SEMESTER |
IV |
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COURSE CODE & NAME |
DCA2208 INTRODUCTION TO NETWORK SECURITY |
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SET-I
Q.1. What is trust management in network security? Explain the concept of policy language and credential validation. (3+3+4 = 10 Marks)
Ans 1.
Trust Management in Network Security
Trust management is a unified structure that operates on a basis of policy. It is used in distributed networks to determine, interpret, and then automatically enforce security rules that define who’s allowed to use which resource under which circumstances. Traditional access control systems rely on central authority servers and existing identity databases that are not scalable and can become single point of failure within large, dynamic, open networks such as the internet. Trust management replaces rigid methods with flexible, credential-based authorization frameworks where access decisions are
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Q.2. What is correlation and traceback in network security? Explain alert correlation and IP traceback techniques. (3+3+4 = 10 Marks)
Ans 2.
Correlation in Network Security
Correlation is the analytical process of regularly aggregating, normalizing and analysing security incidents generated through a variety of heterogeneous sources of data simultaneously to detect sophisticated attack campaigns, coordinated multi-stage attacks, and advanced persistent threats that isolated instances would not ever disclose. Modern networks for enterprise generate many millions of unstructured security events each day through firewalls, intrusion detection systems, web application
Q.3. What is complete mediation? Explain the principle of economy of mechanism, fail-safe defaults, and separation of privilege. (3+3+4 = 10 Marks)
Ans 3.
Complete Mediation
The principle of complete mediation is an integral security design concept that stipulates that every single access request to any protected resource needs to be validated against the current access control policy on each and every occasion, without any exception, without caching previous authorization decisions, and without assuming that permissions that were granted previously are relevant in the present. The principle was formally articulated in the work of Saltzer and Schroeder in their landmark 1975 paper on protection of data in computer systems and a logical framework of concepts that has remained the fundamental intellectual basis for modern security engineering. Absolute mediation demands that every access route does not pass through the security
SET-II
Q.4. What are Message Authentication Codes (MACs)? Explain HMAC and CBC-MAC. How do MACs differ from digital signatures? (2+3+3+2 = 10 Marks)
Ans 4.
Message Authentication Codes (MACs)
A Message Authentication Coding (MAC) can be described as a small digital cryptographic token that has a fixed length. It is calculated from a variable-length input message and a shared secret key, used to simultaneously verify both the integrity and the authenticity of the communication anyone with the same secret key. Integrity verification ensures that the message content has not been
Q.5. Explain buffer overflow attacks and how to prevent them. Discuss stack-based and heap-based overflow. (5+5 = 10 Marks)
Ans 5.
Buffer Overflow Attacks
Buffer overflow attacks exploit mistakes in programming when a program copy more data into the memory buffer of a certain size that it was originally designed for, leading excess data to flow past the buffer’s boundary and write over adjacent memory areas with critical information for program control. Buffer-overflow vulnerabilities are among the earliest, most perilous, and frequently utilized classes of security vulnerability that was responsible for the Morris Worm of 1988, the first major internet-scale attack that was attributed to countless prominent security breaches in the
Q.6. Explain the working of the ARP protocol. Discuss ARP poisoning/spoofing attack and its countermeasures. (3+3+4 = 10 Marks)
Ans 6.
Working of the ARP Protocol
It is the Address Resolution Protocol (ARP) is a non-stateless Layer 2 Network Protocol which is utilized for IPv4 local area networks that automatically resolve physical IP addresses to the physical MAC (Media Access Control) addresses required for constructing acceptable Ethernet frames.
ARP Poisoning / Spoofing Attack
ARP poisoning, often
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SESSION |
JANUARY/FEBRUARY 2026 |
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PROGRAM |
BACHELOR OF COMPUTER APPLICATIONS (BCA) |
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SEMESTER |
IV |
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COURSE CODE & NAME |
DCA2207 DATA MINING AND VISUALIZATION |
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SET-I
Q.1. Define Data Mining. Explain its importance in the modern data-driven world. (5+5 = 10 Marks)
Ans 1.
Definition of Data Mining
Data Mining refers to the process of automatically discovering relevant patterns, relationships, abnormalities, and valuable insights hidden within large datasets using statistical, mathematical, and machine-learning techniques. This is also known in the form of Knowledge Discovery in Databases (KDD). The raw data stored in databases, data warehouses and other repositories of information is processed through a structured process that involves data cleansing Data integration, data cleaning, the
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Q.2. Discuss the difference between Operational Databases and Data Warehouse. (5+5 = 10 Marks)
Ans 2.
Operational Databases (OLTP)
Operational databases, often referred to Online Transaction Processing (OLTP) Systems, are made to support the routine day-to-day business transactions. They handle extremely large volumes of short, real-time transactions which include insertions, changes, deletions, and simple lookup inquiries. The information stored in operational databases reflects what is happening in the operational processes and can be updated constantly and in real-time. These databases use highly normalized schema designs to eliminate data redundancy and maintain the integrity of referential data, which ensures
Q.3. What is a Data Cube? Describe how data cubes organize data into dimensions and measures to support fast analytical queries. (3+7 = 10 Marks)
Ans 3.
Definition of a Data Cube
A Data Cube is a multi-dimensional data structure used for Online Analytical Processing (OLAP) systems for arranging business information across multiple categorical viewpoints called dimensions, enabling analysts to look at slices, aggregate, and view data from multiple angles at once. As opposed to tables that are flat and two-dimensional that are slender, data cubes can have three or more dimensions that provide a deeper and better-organized representation of the complex business
SET-II
Q.4. What is an Association Rule? Define Support, Confidence, and Lift. Explain their importance in Association Rule Mining. (3+7 = 10 Marks)
Ans 4.
Association Rule
An Association Rule is an if-then implied statement in the form of A implies B that is automatically derived from huge transactional datasets, expressing that transactions which contain item A are highly likely to also contain itemset B. Association rule mining is the computation process
Q.5. Discuss how charts convert raw data into visual information for better understanding and decision-making. (10 Marks)
Ans 5.
Role of Charts in Data Visualization
Charts are visual representations of data that transform raw numerical data into visual formats so that our brains are able to process, interpret, and remember more efficiently as tables of data. The research in cognitive psychology shows that human brains process visual data 60 times faster than numeric or textual data. An effective chart immediately reveals trends, patterns, comparative relationships, distributions, and other outliers that require hours of research to uncover from data tables
Q.6. Explain the key steps of the dashboard development process in detail. (10 Marks)
Ans 6.
Introduction to Dashboard Development
Dashboards provide an interactive interface for visuals which consolidates and presents key measures of performance, indicators and trends from a variety of data sources on one screen, enabling stakeholders to monitor organizational health and make informed choices in a single glance. A dashboard that actually serves those who need it needs a systematic, user-centered approach that is able to balance technical implementation in conjunction with design principles for
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JAN/FEB 2026 |
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PROGRAM |
BACHELOR OF COMPUTER APPLICATIONS (BCA) |
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SEMESTER |
IV |
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COURSE CODE & NAME |
DCA2206 SOFTWARE ENGINEERING |
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SET-I
Q.1. Define a system. Explain its elements and characteristics. Discuss different types of systems with suitable examples. (3+3+4 = 10 Marks)
Ans 1.
Definition of a System
A system is made up of interrelated and interdependent components or elements that work together in a coordinated manner to achieve a common, specific goal or create the desired output. Systems operate at every level of human endeavor and technology that range from the solar system in the cosmic scale up to microprocessors at the miniature size. When it comes to computer engineering and information technology systems are a specifically designed mixture of software, hardware,
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Q.2. Define Software Engineering and explain its need. Discuss software characteristics. Explain McCall’s Quality Factors in detail. (3+3+4 = 10 Marks)
Ans 2.
Definition and Need for Software Engineering
Software Engineering is the systematic rigorous, systematic, and quantitative use of engineering concepts instruments, techniques, and methodologies to the specification, design developing, testing, managing, and maintenance of software system. This term was introduced at the 1968 NATO Software Engineering Conference in Garmisch, Germany, to combat what they described as a “software crisis” — a pattern of prominent software failures that were characterized by massive cost overruns, severe schedule delays with poor performance and software that did not meet user
Q.3. What is Requirement Analysis? Explain requirement anticipation and the role of a system analyst. Discuss the knowledge and qualities required for a good system analyst. (3+3+4 = 10 Marks)
Ans 3.
Requirement Analysis
Requirement Analysing is the procedure of identifying, determining the, documenting, validating and governing the needs that the software must meet to successfully serve its intended users as well as meet its business goals. It is generally recognized as the most crucial and influential phase of the Software Development Life Cycle because the mistakes and oversights that are introduced during requirement analysis compound in the cost and complexity when they are propagated through the subsequent stages of development. Research consistently demonstrates that defects discovered and corrected during the requirements stage are typically ten to one hundred times less to repair than similar defects that were discovered during testing or after deployment. Analysis of the requirements results in what is known as the Software Requirements Specification (SRS)
SET-II
Q.4. Explain input and output design in software systems. Describe UML diagrams and their importance in system design with examples. (4+6 = 10 Marks)
Ans 4.
Input Design
Input design refers to the process of determining what data should be gathered, validated, and entered into software systems from external sources like human users as well as connected devices, software systems and data files. The fundamental objective of effective input design is to collect all the relevant data it requires, while minimizing chances of errors while reducing the time required from users, and ensuring the only complete, valid well-formatted data are entered into the system processing. Improper input design is one major causes for data quality problems that propagate across all downstream processing as well as the reporting process. The most important
Q.5. Define software testing and explain its characteristics. Differentiate between verification and validation with suitable examples. (4+6 = 10 Marks)
Ans 5.
Definition of Software Testing
Software testing is the procedure of testing a system or component by executing it in controlled conditions so that you can assess the extent to which it meets the requirements specified by its creator and detect any differences between the behavior and expected behavior and evaluate the overall quality and reliability of the program before it is released. Testing isn’t just the act of using a software program to test if it works; it is a disciplined and planned engineering process that applies specific techniques to increase the likelihood of finding defects while minimizing costs and time
Q.6. Explain Black Box Testing and White Box Testing. Discuss equivalence partitioning, boundary value analysis, and statement & branch coverage techniques. (4+6 = 10 Marks)
Ans 6.
Black Box Testing
Black Box Testing, also called specification-based or functional tests A testing method in which the tester examines the behaviour of the software in response to inputs. This is done without understanding of or any reference to the internal source code and algorithms or the architectural design. Software is viewed as an opaque black box, which transforms inputs and outputs according to its specification. Test cases are created only from the specifications documents, use cases and the requirements that are stated. The role of the tester is to verify that every function the software is supposed to accomplish is performed correctly from the user’s perspective and identify any differences between the specifications and the actual behavior of the system. The Black Box test is a
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SESSION |
JANUARY/FEBRUARY 2026 |
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PROGRAM |
BACHELOR OF COMPUTER APPLICATIONS (BCA) |
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SEMESTER |
IV |
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COURSE CODE & NAME |
DCA2205 PYTHON PROGRAMMING |
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SET-I
Q.1. a) Explain different types of data types used in Python. b) How membership and identity operator works? Explain with example. (5+5 = 10 Marks)
Ans 1.
- a) Data Types in Python
Python is an open-source language that is dynamically typed so variables do not require declarations of their type before usage. Python auto-infers its type from the allocated value when it is run. Python provides a variety of built-in data types that determine what kind of data can be stored and what operations can be applied to it.
int (Integer) int (Integer): Displays complete numbers with no decimal component either negative or positive. Python integers are able to handle arbitrary precision, meaning they can be as huge as memory allows. Examples include 10, -5 10, 100000. floating (Floating Point): Represents real numbers
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Q.2. a) What is the role of file modes in file handling? Explain in detail. b) Explain different methods of adding new data item into list data structure. (5+5 = 10 Marks)
Ans 2.
- a) File Modals in Python for File Handling
The handling of files in Python allows programs to create and read, write and control files on disk. The built-in open() function is utilized for opening a file and it accepts a mode parameter to determine how the file will be opened as well as which operations are allowed in it. It is critical because choosing incorrectly could erase the existing data in error or block important operations.
“r” (Read Mode)”r” (Read Mode): opens an existing file solely for reading. The file’s pointer appears at the beginning of the file. This is the default mode even if there is no explicit mode specified. It raises FileNotFoundError in the event that the requested file exists but isn’t. “w” (Write Mode) (Write
Q.3. a) How tuples are different from list? List different built-in methods used with tuples. b) What is dictionary? How to add and remove data into dictionary. (5+5 = 10 Marks)
Ans 3.
- an) Variations Between Tuples and Lists
Lists and tuples are both ordered sequence data structures that are part of Python that allow for the storage of arrays of heterogeneous elements. But, they are different in their mutability, performance characteristics, memory usage, and suitable use scenarios. Mutability: Lists are flexible, which means their contents can be changed at will upon creation. Element can be added, changed and removed anytime. Tuples can be completely unchangeableafter creation, no element is able to be added, modified, or removed in any circumstance. Any attempt to modify a list of tuples will trigger an error
SET-II
Q.4. a) Explain the concept of variable length and keyword arguments in Python. b) Describe different types of recursions with example. (5+5 = 10 Marks)
Ans 4.
- A) Variable Length as well as Keyword Arguments
Python functions are flexible in their arguments that enable the function to take a variety of arguments without having the caller to specify exactly what number of arguments are passed in the course of defining a function definition. *args (Variable-Length Arguments for Position): Adding an asterisk after a parameter’s name in the definition of a function lets the function accept any number of positional arguments that are provided by the person calling. The body of the function arguments are treated as an ordinary tuple that contains every additional argument for position passed by
Q.5. What is encapsulation? How class variables are different from instance variables. (10 Marks)
Ans 5.
Encapsulation in Python
Encapsulation is one of the four main pillars of Obj-Oriented Programming. It is a part of polymorphism and inheritance as well as abstraction. It’s the concept of connecting the related data (attributes) and the strategies (functions) that work with the data within a single logical unit called classes, but also restricting access from outside only to internal components within the unit. Encapsulation serves two interconnected purposes: it organizes codes by keeping the related information and behaviors together and also protects the state of objects against unintentional external
Q.6. Explain steps for database connectivity in Python. Discuss DDL, DML commands with example. (10 Marks)
Ans 6.
Steps for Database Connectivity in Python
Python provides powerful database connectivity
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SESSION |
JANUARY/FEBRUARY 2026 |
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PROGRAM |
BACHELOR OF COMPUTER APPLICATIONS (BCA) |
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SEMESTER |
II |
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COURSE CODE & NAME |
DCA1210 OBJECT-ORIENTED PROGRAMMING C++ |
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Assignment Set – 1
Q.1. Discuss the different basic features of Object-Oriented Programming (OOP) in detail, with examples. Explain in detail about basic structures of C++. (5+5 = 10 Marks)
Ans 1.
Basic Features of Object-Oriented Programming
The Object-Oriented programming paradigm is a software approach that describes real-world entities as objects containing data as well as behaviour. Its core features form the base of modern software design.
Encapsulation combines data as well as the functions that work on the data into a single piece that is called a “class” and blocks access directly to internal data through access specifiers such as privacy and open. As an example
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Q.2. a) Compare and contrast for loop and while loops detail of execution flow and behaviour. b) Differentiate between the conditional statement and unconditional statements with examples. (5+5 = 10 Marks)
Ans 2.
- a) For Loop vs While Loop
While and for loops run the same code as long as a conditions is fulfilled, but they differ in terms of structure and their best uses.
The for loop blends conditions, initialization and update into a single header line. It’s most effective when the number
Q.3. Define Arrays. Explain the concept of arrays in C++ programming. How are arrays declared and initialized? Give Examples. (2+3+5 = 10 Marks)
Ans 3.
Definition of Array
An array is made up of elements of the same data type that are kept in contiguous storage locations with a common variable name. Every element can be accessed by an index beginning from zero. Arrays enable multiple similar values to be stored, and processed efficiently without declaring separate
Assignment Set – 2
Q.4. Define Friend Function. Compare between Friend function and inline function with give examples. Explain in detail about Operator overloading with examples. (2+3+5 = 10 Marks)
Ans 4.
Friend Function
A friend function that is used in C++ is a member function that does not have access to the private and protected members of the class. It is defined within the class by using the friend keyword, however it is implemented out of the class using the scope resolution operators. It does not belong to the class, however, it is granted special access rights granted by the class.
Friend Function vs Inline
Q.5. Recall stream. Draw and explain the stream class hierarchy in C++. (2+3+5 = 10 Marks)
Ans 5.
Definition of Stream
A stream in C++ is an abstraction that indicates a flow of data into or out of a programmer. It serves as an intermediary between the program and output or input devices, such as keyboards or monitor, as well as files. Streams obscure the particulars of how data is physically read or written, and offer an
Q.6. Define exception. Explain in detail about exception handling mechanism. (5+5 = 10 Marks)
Ans 6.
Definition of Exception
A problem in C++ is an unexpected or abnormal event that occurs during the execution of a program, and interrupts the normal process. The reason for exceptions is as diverse that of division with zero, error in access to memory, files not identified, or a wrong user input. If handled incorrectly an error causes the program’s termination abruptly and display a message of error. C++ provides a systematic mechanism to recognize and deal with exceptions efficiently and without
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JANUARY/FEBRUARY 2026 |
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PROGRAM |
BACHELOR OF COMPUTER APPLICATIONS (BCA) |
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SEMESTER |
II |
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COURSE CODE & NAME |
DCA1209 PRINCIPLES OF PROGRAMMING LANGUAGES |
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Assignment Set – 1
Q.1. Describe variables and their six attributes with relevant examples. (2+8 = 10 Marks)
Ans 1.
Definition of Variable
A variable in a programming language refers to a designated storage space in memory, which stores a value which can be altered, read, or accessed during execution. Variables let programmers deal with data by symbol rather than using raw memory addresses. Every variable is a collection of associated attributes that define its behavior, storage, and its access to a programmer.
Six Attributes
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Q.2. Elaborate on imperative programming with an example. (10 Marks)
Ans 2.
Imperative Programming is among the oldest and most commonly utilized programming techniques. It defines computation as a series of statements which alter a program’s state step by step. Programmers specify what computer needs to do a task by providing detailed instructions that are in the exact order. Imperative is the Latin word”command”, representing the manner of giving the machine direct
Q.3. Write in brief on – Parameterized Exceptions, Functional Programming. (5+5 = 10 Marks)
Ans 3.
Parameterized Exceptions
A programming exception is an incident that interrupts the normal process of execution as a result of an error or unexpected condition. Parameterized exceptions have additional information or parameters to accompany them whenever they are raised. Rather than simply signaling that an error has occurred the parameterized exception provides context-specific information on the cause and nature of an error to the operator who is able to catch it. It makes the handling of errors more
Assignment Set – 2
Q.4. Define Thread. Explain the common approaches to thread creation. (2+8 = 10 Marks)
Ans 4.
Definition of Thread
Threads are the smallest piece of code within a program. A process is an individual program running in memory with its own address space but a single thread is a lightweight sub-unit that is part of a process that shares the process’s memory codes, resources and code with other threads of the same process. The multiple threads of the procedure can run concurrently which allows a program multiple tasks at
Q.5. Write a short note on – Scope and its types, Lazy Evaluation. (5+5 = 10 Marks)
Ans 5.
Scope and Its Types
The term “scope” in programming means the location or context in a program where a declared variable, function or identifier is available and relevant. Scope rules dictate which portions of the program can read or modify a given variable as well as how name conflicts between identifiers that are identically
Q.6. Why is Python considered a popular scripting language? Explain with an example. (6+4 = 10 Marks)
Ans 6.
Python is one of the most frequently used programming languages around the globe and is particularly celebrated as a scripting language for automation, data processing, and quick application development. Many aspects are what make Python exceptionally popular across diverse areas like web development, artificial intelligence, data science computational science, as well as the
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JAN/FEB 2026 |
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PROGRAM |
BACHELOR OF COMPUTER APPLICATIONS (BCA) |
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SEMESTER |
II |
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COURSE CODE & NAME |
DCA1208 DATABASE MANAGEMENT SYSTEM |
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Assignment Set – 1
Q.1. A.) Explain the roles of the Database Administrator (DBA) and Database Users. B.) Explain Codd’s rules and their significance in relational database design. (5+5 = 10 Marks)
Ans 1.
A.) Roles of the Database Administrator and Database Users
The Database Administrator, commonly called DBA, is a skilled person who is in charge of overseeing the entire database environment. The DBA designs the database schema and physical structure, ensuring an efficient retrieval and storage. Essential responsibilities include setting up and configuring a databases management software, establishing the user account, with adequate access rights, conducting regular backups and operations to protect data from destruction, and monitoring the performance of databases as well as tuning queries for efficiency while also implementing security
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Q.2. Explain the importance of keys in ER modeling and differentiate between primary, candidate, and composite keys. (10 Marks)
Ans 2.
Keys in Entity-Relationship modeling are either attributes or combinations of attributes that uniquely identify each particular entity within an entity set. Keys play a critical role to ensure data integrity by making connections between entities and in preventing duplicate records. Without keys, it would not be possible to distinguish between two distinct records, and to establish reliable
Q.3. Draw and explain an ER diagram for a library management system, mentioning entities, attributes, and relationships. (10 Marks)
Ans 3.
An Entity-Relationship diagram can be described as an image representation of the schema of data for a computer system that shows entities, their properties, and connections between them. As a library system, the ER diagram outlines the structures that is required for managing membership, books as well as borrowing transactions in a way that is efficient.
Entities and Their Attributes
The Member entity is a representation of those who are registered as library members. Its attributes include
Assignment Set – 2
Q.4. Describe the types of anomalies in a database and give examples for each. (10 Marks)
Ans 4.
The database anomalies can be described as problems or irregularities that occur in the database that is poorly constructed especially in tables that are not normalized. Anomalies occur when a table contains redundant data that leads to difficulties when adding updates, deleting, or inserting records. The understanding of the three kinds of anomalies is crucial to understand why normalization is
Q.5. Discuss the different categories of SQL commands with examples. (10 Marks)
Ans 5.
Structured Query Language, commonly called SQL is the most widely used software used to communicate with database systems that are relational. SQL commands are grouped into five main categories based on their purpose: Data Definition Language, Data Manipulation Language, Data Control Language, Transaction Control Language and Data Query Language. Each type of category
Q.6. A.) Why is normalization important in relational databases? B.) Explain the ACID properties of a database transaction in detail. Why are these properties crucial in ensuring database reliability? Support your answer with suitable examples for each property. (5+5 = 10 Marks)
Ans 6.
A.) Importance of Normalization in Relational Databases
Normalization is the process of creating a relational database in order to reduce data redundancy and increase data integrity. It involves decomposing large poorly-structured tables into smaller, well-defined tables linked with foreign keys. If a database is not normalized, it suffers from insertion, update and deletion issues that lead to data inconsistencies. Normalization makes sure that every
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JAN/FEB 2026 |
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PROGRAM |
BACHELOR OF COMPUTER APPLICATIONS (BCA) |
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SEMESTER |
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COURSE CODE & NAME |
DCA1207 DATA STRUCTURES |
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Assignment Set – 1
Q.1. Discuss the fundamental components of problem-solving techniques? What is the classification of data structures? (5+5 = 10 Marks)
Ans 1.
Fundamental Components of Problem-Solving Techniques
Problem-solving is a systematic process that involves analyzing a problem before finding a suitable and practical solution. It involves many fundamental parts which together help a programmer through the process of understanding a challenge to finding a solution.
Analyzing the problem is the primary step where the problem is thoroughly studied to comprehend its inputs,
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Q.2. Write an algorithm to find a particular number in an array and replace it with some other value. (5+5 = 10 Marks)
Ans 2.
Finding and replacing the value in an array is a fundamental operation when programming. This involves scanning every element in the array one by one starting from the index that is first and ending at the last. This is referred to as linear search or sequential search. The method compares every element to the desired value to be searched. When a match is found an element in the position in question is substituted with the new value provided. The search proceeds through the whole array, replacing all occurrences if the target occurs more than one time. Linear Search works with both sorts and unsorted arrays. Its time complexity of O(n) in which n represents the amount of
Q.3. Write an algorithm to input two 3X3 matrices from the user, multiply them, and display the result matrix. Explain the memory representation of the resulting 2D array. (5+5 = 10 Marks)
Ans 3.
Memory Representation of 2D Array
A memory array with two dimensions is stored in a one-dimensional series of elements in a row-major order. A 3×3 matrix is row zero comprises the initial three memory locations first, then row one takes up the remaining three, and row two the final three. The element at row i and column j is stored at
Assignment Set – 2
Q.4. What is a linked list and its types? Discuss the benefits of using them over array in detail. (10 Marks)
Ans 4.
A linked list is a type of linear data structure that has components, also known as nodes, are linked using pointsers. In contrast to arrays, linked list nodes don’t reside in contiguous memory locations. Every node has two components of a data field which holds the actual value, and a pointer field known as next, which stores the address to the memory of the following node. The pointer of the last
Q.5. What is a doubly circular queue? Write an algorithm to display the contents of the circular queue. (5+5 = 10 Marks)
Ans 5.
Doubly Circular Queue
A queue is a data structure that follows an First In First Out principle in which elements are added at the rear of the structure and later taken out from the front. A circular queue enhances the basic queue by linking the back position to the front, forming a circle. This removes an empty space on the top of the standard queue after dequeue operations. A doubly circular queue an extension that blends features of the doubly linked list as well as circular queue. Each of the nodes in a circular queue contains a data field, a next pointer to the following node, and another prev pointer for the previous node. The next node of the last one points back to the first node while the initial node’s preceding pointers back towards the prior node. This creates a completely circular double linked
Q.6. Write an algorithm for Binary Search and explain its divide-and-conquer approach. (10 Marks)
Ans 6.
Binary search is an efficient method of searching that helps to identify the desired element within an array of sorted elements. It functions by repeatedly cutting the search interval by half, which drastically reduces the number of comparisons needed in comparison to linear search. While linear search examines every aspect one-by-one and is a time-complex of O(n) while binary search has a complexity of O(
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JAN / FEB 2026 |
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BACHELOR OF COMPUTER APPLICATIONS (BCA) |
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SEMESTER |
II |
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COURSE CODE & NAME |
DCA1206 BASIC STATISTICS AND PROBABILITY |
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Assignment Set – 1
Q.1. Describe the types of data classification based on nature, measurement scale, and time reference. Provide examples. (10 Marks)
Ans 1.
Data classification is the method of separating data into categories according to specific features. When it comes to statistics, data gets categorizes based on three general parameters: the nature of data, measurement scale, and the time reference. The understanding of these classifications aids researchers to choose the most appropriate statistical techniques and analysis tools.
Classification Based on Nature
On the basis of nature, data is divided into qualitative and quantitative varieties. Qualitative data, sometimes
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Q.2. Discuss the advantages and limitations of the Arithmetic Mean. In which situations it is not an appropriate measure of central tendency? (10 Marks)
Ans 2.
The arithmetic mean is the most often used indicator of central tendency in stats. It is determined by dividing the sum of all data points by the number of observations. This provides one representative value that summarizes the entire array of observations and provides the basis of many statistical algorithms.
Advantages of Arithmetic Mean
The arithmetic means is straightforward for anyone to comprehend, and also easy to determine. It takes every single value
Q.3. Compare range, interquartile range, and standard deviation in terms of calculation, interpretation, and suitability. (10 Marks)
Ans 3.
Measures of dispersion show the extent to which the data have been around the central figure. Range, interquartile range, and standard deviation are the three key measures of dispersion. Each is unique in its method of calculation, interpretation as well as conditions to be considered suitable.
Range
The most basic measure of dispersion. It’s determined by subtracting the minimum amount in the database from the
Assignment Set – 2
Q.4. What is a sample space in probability? Explain the concept with various examples and its importance in probability theory. (10 Marks)
Ans 4.
Probability theory refers to the field of maths that studies the possibility of events taking place. In its foundation is the notion of a sample space. It defines the possibilities of the outcomes that could occur from a random experiment. An understanding of the space of the sample is crucial before any probability can be
Q.5. Explain the multiplication rule of probability. How does it differ when applied to independent versus dependent events? Provide examples to clarify. (10 Marks)
Ans 5.
The probability multiplication rule can be used to determine the chance that two or more events all occur together. It calculates the probabilities of the simultaneous occurrence of many events. It’s one of the primary laws of probability theory. The rule takes different forms depending on whether the events are dependent or independent.
Multiplication Rule
Q.6. Differentiate between mutually exclusive and independent events. Provide examples and explain how they influence probability calculations. (10 Marks)
Ans 6.
In the field of probability, mutually exclusive events and independent events are both important but distinct concepts that are frequently confused. Knowing the distinction between them is essential for applying the right probability rules and coming to exact conclusions when conducting statistical analyses.
Mutually Exclusive