DCA2209 & SYSTEM SOFTWARE

Description

SESSION	FEB-MARCH 2026
PROGRAM	BACHELOR OF COMPUTER APPLICATIONS (BCA)
SEMESTER	IV
COURSE CODE & NAME	DCA2209 & SYSTEM SOFTWARE

 

 

 

Assignment Set – 1

 

 

Q1. Explain the functional units of the 8086 Microprocessor and discuss the role of Bus Interface Unit (BIU) and Execution Unit (EU).

Ans 1.

The Intel 8086 is a 16-bit microprocessor introduced in 1978. It was the earliest member of the x86 family and became the base for current personal computing designs. The 8086 can be internally split into two independent, operational units that are parallel: the Bus Interface Unit (BIU) and the Execution Unit (EU). This division permits instructions fetching and execution to work together,

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Q2. Discuss the problem of forward references in a single pass assembler. How are undefined symbols handled?

Ans 2.

An assembly converts programming into machine code. Most assemblers operate in two successive passes through the source code. A two-pass assembler can resolve all symbols definitions during the initial pass, and then generates object code during the second. An assembler that is single-pass, attempts to generate object code with just one pass through the source code. While this is faster and more efficient with memory However, it presents a serious challenge known as

 

Q3. Differentiate between Macro Name Table (MNT) and Macro Definition Table (MDT). Describe the working of a simple bootstrap loader in detail. Explain how object code is read, converted, stored in memory, and executed.

Ans 3.

Part A — MNT vs MDT

In macro processors, there are two key data structures are utilized to manage and store macro definitions. They are Macro Name Table (MNT) and the Macro Name Table (MNT) and the Macro Definition Table (MDT).

The Macro

 

 

Assignment Set – 2

 

 

Q4. Explain the process of program relocation in a linker with suitable explanation of translated origin, linked origin, and relocation factor.

Ans 4.

If a program is written and assembles, the assembler generally generates object codes assuming that the program will be loaded at a specified memory address, often starting at address zero. The assumed address for starting is called the translated starting point. However, in the real system, multiple programs may require co-existence in memory. Furthermore, a program might not be loaded until address zero. The procedure by which the linker alters all address-dependent values in the object code in order to

 

Q5. Explain how PCI devices configure automatically during boot time. Discuss the role of device drivers in PCI initialization.

Ans 5.

PCI (Peripheral Component Interconnect) is a hardware bus protocol for connecting peripherals the motherboard. Its Plug and Play support allows devices to be automatically detected and configured in the boot process without manual intervention, managed by the BIOS and operating system.

PCI

 

Q6. Explain the importance of security in the Android Operating System with reference to modern smartphone applications and threats. Explain the difference between local network resource discovery using Simple Service Discovery Protocol and Internet-wide discovery using UDDI.

Ans 6.

Part A — Android Security

Android is among the most popular mobile operating system in the world, powering millions of tablets and smartphones. In the wake of the explosion of mobile banking electronic commerce, personal communications and health software, security has become the primary concern of Android’s