CS401 Final Term Solved Papers 2022-2024 by Aanaa

FINAL TERM PREPARATION

CS401 – ASSEMBLY LANGUAGE PROGRAMMING

100% CORRECT SOLVED REPEATED QUESTIONS FROM PAST PAPERS (2022 – 2024) BY STUDY BUDDY HUB

How does processor handle the multiple pins using single INT pin?

A processor handles multiple interrupt sources using a single INT pin by employing an interrupt controller. The controller manages and prioritizes multiple interrupt requests, sending a signal to the processor INT pin only when an interrupt needs to be serviced. This allows the processor to handle various interrupt sources efficiently through a single interrupt line.

What is the purpose of BIOS parameter block?

The BIOS parameter block (BPB) is a structure that provides parameters about the storage medium. It is stored in the first sector or the boot sector of the device. It is crucial for defining how the disk is organized and ensuring that BIOS can correctly read from and write to the disk.

Write the purpose of multi-threading?

The purpose of multi-threading is to improve the efficiency and performance of a program by allowing it to perform multiple tasks concurrently. This can lead to better resource utilization, increased responsiveness, and faster execution of complex tasks, especially on multi-core processors where threads can run in parallel.

Write names of VESA services?

VESA stands for Video Electronics Standards Association. It includes some important services such as: INT 10 – VESA – Get SuperVGA Information INT 10 – VESA – Get SuperVGA Mode Information INT 10 – VESA – Set VESA Video Mode

Difference b/w multi-tasking and multi-threading?

Multi-tasking

Multi-threading

Definition Running multiple processes Running multiple threads within a single process. Scope Involves multiple processes. Involves multiple threads within a single process. Resource Sharing Processes are isolated and do not share memory directly. Threads share the same memory space and resources. Performance Performance can be affected by the need for context switching and managing multiple processes. Typically, more efficient for tasks that can be parallelized within a single process.

Management Managed by the operating system. Managed within the application or by a thread library or runtime system.

Which interrupt is used for extended read operation on disk? Also mention the corresponding service number?

Interrupt and Service Number for Extended Disk Read Operation is as follows: Interrupt: INT 13h

Service Number: 42h

The interrupt INT 13h is used for disk operations, and service number 42h specifically handles extended read operations on the disk.

Difference b/w serial and parallel ports?

Serial Port

Parallel Port

Data Transmission The bits are sent one by one on the serial port in a specially formatted fashion. It transmits data sequentially. In case of parallel port, whole bytes are sent from one place to another. It transmits multiple bits

Number of wires Less wires (typically 2 for data, plus control lines). More wires (often 25 or more) for data and control. Distance and interference Better for long distances with less interference. Better for short distances, more prone to signal degradation and crosstalk.