B.S.W.E. Bachelor of Software Engineering Operating Systems & Systems Programming 2

Question 1

What is the purpose of a semaphore in concurrent programming?

Accepted Answer

To control access to a shared resource by multiple threads or processes

Answer

To allocate memory dynamically

Answer

To detect memory leaks at runtime

Answer

To schedule CPU time for kernel threads

Question 2

In C programming, what does the 'volatile' keyword indicate?

Accepted Answer

The variable may be changed by external factors (e.g., hardware or another thread), preventing compiler optimization

Answer

The variable is stored in a CPU register

Answer

The variable is immutable after initialization

Answer

The variable is allocated on the heap

Question 3

What is the role of the kernel in an operating system?

Accepted Answer

It acts as the core component managing hardware resources and providing services to user programs

Answer

It renders the graphical user interface

Answer

It compiles source code into machine code

Answer

It manages network connections exclusively

Question 4

Which memory region stores local variables and function call information?

Accepted Answer

Stack

Answer

Heap

Answer

Code segment

Answer

BSS segment

Question 5

What is a race condition in concurrent programming?

Accepted Answer

A bug where program behavior depends on the relative timing or ordering of uncontrolled events

Answer

A scheduling priority given to real-time threads

Answer

A performance optimization using multiple CPU cores

Answer

A hardware interrupt that preempts a running process

Question 6

What is the purpose of paging in memory management?

Accepted Answer

To divide physical memory into fixed-size frames and logical memory into pages, enabling non-contiguous allocation

Answer

To compress memory contents to save space

Answer

To prioritize memory access for kernel processes

Answer

To replicate memory across multiple processors