BCS Operating Systems

Question 1

What is a deadlock in operating systems?

Accepted Answer

When two or more processes wait indefinitely for resources held by each other

Answer

When a process uses 100% CPU

Answer

When the OS runs out of virtual memory

Answer

When a process terminates unexpectedly

Question 2

Which CPU scheduling algorithm may cause starvation for low-priority processes?

Accepted Answer

Priority Scheduling

Answer

Round Robin

Answer

First-Come First-Served

Answer

Shortest Job First

Question 3

What is virtual memory?

Accepted Answer

A technique that uses disk space to extend the apparent available RAM

Answer

RAM that has been overclocked

Answer

Memory used exclusively by the OS kernel

Answer

Cache memory on the CPU

Question 4

In the context of OS, what is a semaphore?

Accepted Answer

A synchronization primitive used to control access to shared resources

Answer

A hardware interrupt signal

Answer

A memory management unit

Answer

A type of file system

Question 5

What does the term 'thrashing' refer to in operating systems?

Accepted Answer

Excessive paging activity where the OS spends more time swapping pages than executing processes

Answer

Excessive context switching with no useful work

Answer

CPU overheating under heavy load

Answer

Hard disk fragmentation

Question 6

Which process state transition occurs when a running process is preempted by a higher-priority process?

Accepted Answer

Running → Ready

Answer

Ready → Running

Answer

Running → Blocked

Answer

Blocked → Ready