NPTEL Introduction to Operating Systems Week 3 Assignment Answers 2024

1. If the MAX_SIZE is 0x20000000, the virtual address of a kernel variable is 0x2fffffff, and the Physical memory starts from 0x00000000, then the Physical address of the kernel variable will be __________.

0xffffffff
0x00ffffff
0x0fffffff
0xffffff

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2. The kernel pages in Physical and Virtual Address space are mapped randomly.

True
False

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3. There are multiple copies of kernel in the Physical Address space but there is only one copy of kernel in Virtual Address space from where all the processes share it.

True
False

Answer :-

4. There are two processes currently in a system. Process A has no I/O operations, process B has an I/O operation that reads the input from the keyboard. When Process A pre-empts process B (not executing I/O) process B goes from to _________________.

Ready, Running
Ready, Runnable
Running, Ready
Blocked, Runnable

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5. There are two processes currently in a system. Process A has no I/O operations, process B has an I/O operation that reads input from the keyboard. When Process B executes the I/O, and Process A goes from to ______________.

Running, Ready
Ready, Runnable
Ready. Running
Blocked, Runnable

Answer :-

6. When a child is being created from a parent using the fork() system call initially the state of the process is set to READY state and before the fork() system call returns the state is changed to RUNNING.

True
False

Answer :-

7. When a child process is created using the fork() system call, its state is set to running.

True
False

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8. A zombie process is used to remove the reaper processes created on termination, which if not controlled, might lead to infinite resource leakage.

True
False

Answer :-

9. I. The value of all the registers are same for parent and child process except for the registers %eip and %ebp
II. forkret changes only the %eip of child