Question

Choose the correct statements about fork and vfork system calls. Statement-I: vfork is faster than fork. Statement-II: fork is safer than vfork. Statement-III: vfork shares parent's memory, fork copies memory.

• A. Statement-I and Statement-II only
• B. Statement-II and Statement-III only
• C. Statement-I and Statement-III only
• D. Statement-I, Statement-II and Statement-III

Hint:

fork() = safer, separate memory vfork() = faster, shared memory

Answer 1

The Correct Option is D

Concept: Both fork() and vfork() create a child process, but they differ in memory handling.

Step 1: Analyze Statement-I.
vfork() avoids copying the parent's address space. Therefore it executes faster than fork(). Hence Statement-I is true.

Step 2: Analyze Statement-II.
fork() gives the child a separate memory space. This prevents accidental modification of the parent's data. Hence fork() is safer. Statement-II is true.

Step 3: Analyze Statement-III.
In vfork(), the child temporarily shares the parent's memory. In fork(), the child receives a copy of the parent's memory space. Thus Statement-III is true.

Step 4: Determine the final answer.
All three statements are correct. \[ \boxed{\text{Statement-I, Statement-II and Statement-III}} \]