OS 2021 A1 Batch Quiz 2
Authored by Sneha M
Computers
University
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A system call that never returns on success is _________
Fork()
Execl()
Getpid()
Vfork()
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A process executes the code. How many processes are newly created main(){ fork (); fork (); fork ();}
7
4
8
3
3.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
A thread is usually defined as a ‘light weight process’ because an operating system (OS) maintains smaller data structures for a thread than for a process. In relation to this, which of the followings is TRUE?
The OS does not maintain a separate stack for each thread
On per thread basis, the OS maintains only scheduling and accounting information.
On per-thread basis, the OS maintains CPU register state and stack
On per-thread basis, the OS does not maintain virtual memory state
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which header file is required to invoke wait system call
<sys/types.h>
<unistd.h>
<stdlib.h>
<sys/wait.h>
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kernel mode is also known as
Privileged mode
System mode
Supervisor mode
All of the above
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Microkernels use _____ for communication.
message passing
shared memory
system calls
virtualization
7.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Which of the following is FASLE
Vfork uses copy-on-write to save resources
Dual Mode Operation is to ensure protection and security of the System
Real-time systems use priority based scheduling
A hard real-time system meets response requirements under all conditions
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