Process Management — Practice MCQs for CCAT

Correct Answer: B — Process state, registers, memory info

PCB stores process ID, state, registers, memory limits, scheduling info, etc.

Correct Answer: A — New, Ready, Running, Waiting, Terminated

Five process states: New, Ready, Running, Waiting (Blocked), Terminated.

Correct Answer: B — Creates new process

fork() creates a child process as copy of parent.

Correct Answer: B — Terminated but entry in process table exists

Zombie: process terminated but parent hasn't read its exit status.

Correct Answer: B — Child whose parent terminated

Orphan process: child process whose parent has terminated.

Correct Answer: B — Code, data, files

Threads share code, data, and files; each has own stack and registers.

Correct Answer: B — Multiple CPUs

Multiprocessing uses multiple processors/CPUs.

Correct Answer: B — Mutual exclusion lock

Mutex ensures mutual exclusion in critical sections.

Correct Answer: A — Mutual exclusion, Progress, Bounded waiting

Three requirements: Mutual Exclusion, Progress, Bounded Waiting.

Correct Answer: B — Semaphores (mutex + full + empty)

Uses mutex for critical section, full and empty semaphores for synchronization.

Correct Answer: B — Saving and restoring process state

Context switching saves current process state and restores the state of another process.

Correct Answer: B — OS can interrupt running process

Preemptive scheduling allows OS to interrupt a running process to run another.

Correct Answer: B — Process runs until it voluntarily releases CPU

In non-preemptive scheduling, a process runs until it completes or blocks voluntarily.

Correct Answer: C — LRU

LRU (Least Recently Used) is a page replacement algorithm, not CPU scheduling.

Correct Answer: B — FCFS

Convoy effect in FCFS: short processes wait behind long process.

Correct Answer: B — SJF and Priority scheduling

Starvation can occur in SJF (long jobs) and Priority scheduling (low priority jobs).

Correct Answer: B — Starvation

Aging gradually increases priority of waiting processes to prevent starvation.

Correct Answer: C — Shared memory and message passing

IPC methods include shared memory, message passing, pipes, and sockets.

Correct Answer: B — fork()

fork() creates a new child process as a copy of the parent process.

Correct Answer: B — To prevent race conditions

Synchronization prevents race conditions when multiple processes access shared resources.