DCA6109 PYTHON PROGRAMMING

Description

SESSION	JULY-AUGUST 2025
PROGRAM	MASTER OF COMPUTER APPLICATIONS (MCA)
SEMESTER	1
COURSE CODE & NAME	DCA6109  PYTHON PROGRAMMING

 

 

Set-I

 

1.a) Explain the difference between implicit and explicit type conversion with suitable examples.

1. b) What risks can arise if a file is not properly closed after completing operations? 5+5

Ans 1.

 (a) Implicit and Explicit Type Conversion

Type conversion in Python refers to the process of changing the data type of a value into another type so that operations can be performed smoothly. Python provides two broad categories of type conversion: implicit and explicit. Implicit conversion occurs automatically during program execution when Python internally promotes a smaller data type into a larger one to prevent data loss. For example, when an integer and float are used together in an expression like 5 + 3.5, Python automatically

 

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Q2. a) What is a list? Explain the insert(), append(), and extend() methods with examples.

1. b) Explain the use of following string functions: – upper(), lower(), isdigit(), isalpha(), split(), join() with example. 5+5

Ans 2.

 (a) List and Explanation of insert(), append(), extend()

A list in Python is a versatile and ordered collection that can store multiple values, including mixed data types such as integers, strings, and even nested lists. Lists are mutable, meaning their contents can be altered after creation. They allow indexing, slicing, and support a wide variety of built-in methods that make them one of the most frequently used data structures in Python programming. Lists are written using square brackets, for example: names = [“John”, “Aisha”, “Ravi”]. The ability to dynamically add or modify elements makes lists suitable for tasks such as managing datasets, handling user

 

 

 

Q3. a) Why is exception handling important? How can multiple exceptions be handled in Python? Explain with an example.

1. b) Discuss the different methods used to read data from a file. 5+5

Ans 3.

 (a) Importance of Exception Handling and Multiple Exceptions

Exception handling in Python is an essential mechanism that ensures programs do not terminate abruptly when unexpected errors occur. Without exception handling, even a minor error such as division by zero, invalid input, or a failed file operation may cause the entire program to stop functioning. This negatively affects user experience, reliability, and stability. Exception handling allows the programmer to predict possible errors and write alternate blocks of code to manage them gracefully. As a result, instead of stopping, the program continues to run or displays a meaningful

 

Set-II

 

Q4. a) What are view functions in Flask? Explain static and dynamic routes in detail.

1. b) Write a regular expression for validating Indian mobile numbers entered by users. (+91-XXXXXXXXXX) 5+5

Ans 4.

 (a) View Functions in Flask & Static vs Dynamic Routes

In Flask, a view function refers to the function that is connected to a specific URL of the web application. When a user visits a particular route in the browser, Flask executes the associated view function and returns the response. A view function generally returns HTML content, JSON data, or any valid HTTP response. It forms the core of request–response handling because it decides how the application behaves when a specific endpoint is accessed. The function is mapped to a route

 

Q5.a) Explain the role of game loops and event handling in game development. b) What are transactions? Explain importance of SAVEPOINT in transaction failure. 5+5

Ans 5.

 (a) Role of Game Loops and Event Handling in Game Development

Game loops play a central role in game development because they continuously control how a game progresses. Every game needs to update its characters, animations, physics, and environment at a steady, predictable pace. The game loop manages these updates by running repeatedly from the moment the game starts until it ends. During each iteration of the loop, the game reads player input, updates game objects, checks conditions, and redraws the screen. Without a loop, a game would remain static and would not respond to movement, collisions, or real-time changes. The loop also

 

6.a) Explain the significance of PEP8 guidelines in Python development. b) What do you understand by Continuous Integration and Continuous Deployment (CI/CD) in the context of Python applications?           5+5           

Ans 6.

 (a) Significance of PEP8 Guidelines in Python Development

PEP8 is the official style guide for writing Python code, and it plays a significant role in ensuring that Python programs remain readable, consistent, and maintainable. The purpose of PEP8 is not just aesthetic—it helps developers write code that is easy to understand by others working on the same project. Consistent naming conventions, indentation rules, spacing, and line length guidelines make large codebases more