Operating System Concepts Quiz

In preemptive scheduling, a running process is interrupted when:

• It finishes execution

• A process with a shorter burst time arrives

• The CPU becomes idle

• Higher-priority process arrives

The main disadvantage of multithreading is:

• Less responsiveness

• Increased memory usage

• Complexity in synchronization

• No concurrency

What is the default state of a newly created process?

• Running

• Waiting

• Ready

• Blocked

Context switching involves:

• Saving registers of old process

• Loading registers of new process

• Changing memory maps

• All of the above

Deadlock avoidance requires:

• Resource allocation graph

• Banker’s Algorithm

• Circular wait

• Wait-for graph

Deadlock prevention ensures:

• One of the necessary conditions never holds

• All necessary conditions are allowed

• System may enter unsafe state

• Deadlock is ignored

Which is true about segmentation?

• Fixed-size blocks

• Internal fragmentation

• Logical division of programs

• Used in FIFO

Operating system is a:

• Hardware component

• Collection of programs

• Application software

• Device driver

In preemptive SJF, if two processes have the same burst time, which will execute first?

• One with higher priority

• One with lower arrival time

• One with larger PID

• None

The main advantage of paging over segmentation is:

• Easy relocation

• No internal fragmentation

• Variable page sizes

• No external fragmentation