Operating System Mcq [SET - 6] | Operating System Mcq for BCA

 

1. The ______ register is read by the host to get input.

A) flow in
B) flow out
C) data in
D) data out

ANSWER= (C) data in

 

2. ____ code will not be entertained for input/output at any circumstance.

A) User
B) Machine
C) I/O
D)  System

ANSWER= (B)  Machine

 

3. Which of the following is a database of information about the windows operating system including customized settings and software installations?

A) Registry
B) Changelog
C)  Performance Monitor
D)  None of the above

ANSWER= (A) Registry

 

4. The primary purpose of an operating system is

A) To make the most efficient use of the computer hardware
B) To allow people to use the computer
C) To keep systems programmers employed
D) To make computers easier to use

ANSWER= (A)  To make the most efficient use of the computer hardware

 

5. Which of the following is not a high-level language?

A) COBOL
B) Pascal
C) C
D) Java

ANSWER= (A) COBOL

 

6. Which one scheduling algorithm is designed especially for time sharing systems

A) First-come, first-served scheduling
B) Shortest Remaining time
C) Preemptive priority Scheduling
D) Round-robin scheduling

ANSWER= (D) Round-robin scheduling

 

7. Push migration and pull migration are two types of ________ approach

A) Load balancing
B) Processor Affinity
C) Symmetric Multithreading
D) Synchronous Multithreading

ANSWER= (A) Load balancing

 

8. The cylinder skew problem is concern with which of the following

A) Semaphore
B) Thrashing
C)  Interleaving
D) Deadlock

ANSWER= (C)  Interleaving

 

9.  The only state transition that is initiated by the user process itself is

A) block
B)  Dispatch
C) wakeup
D) none of the above

ANSWER= (A)  block

 

10. A process stack does not contain

A) function parameters
B) local variables
C) return addresses
D) PID of child process

ANSWER= (A) PID of child process

 

11. Which system call returns the process identifier of a terminated child?

A) wait
B) exit
C) fork
D) get

ANSWER= (A) wait

 

12.  When a computer is ‘’ swapping’’ it is

A)  moving data from the hard drive to the floppy drive
B) moving data from memory to the swap file on the hard drive
C) moving data between registers in memory
D) none of the above

ANSWER= (B) moving data from memory to the swap file on the hard drive

 

13. Operating systems

A) enables the programmer to draw a flow chart
B)  provides a layer, user friendly interface
C) links a program with subroutine it references
D) all of these

ANSWER= (B)  provides a layer, user friendly interface

 

14. Which of the following does not interrupt a running process ?

A) A device
B) Timer
C) Scheduler process
D) Power failure

ANSWER= (C) Scheduler process

 

15. Several processes access and manipulate the same data concurrently and the outcome of the execution depends on the particular order in which the access takes place, is called a(n) ____.

A) Shared Memory Segments
B) Entry Section
C) Race condition
D) Process Synchronization

ANSWER= (C) Race condition

 

16. What is dispatch latency?

A) The time taken by the dispatcher to stop one process and start another
B) The time taken by the processor to write a file into disk
C) The whole time taken by all processor
D) None of Above

ANSWER= (A) The time taken by the dispatcher to stop one process and start another

 

17. UNIX operating system

A) can run on PC’s and larger system
B) is multitasking
C)  is multiuser
D) all of these

ANSWER= (D) all of these

 

18. To avoid deadlock

A) there must be a fixed number of resources to allocate
B) resource allocation must be done only once
C) all deadlocked processes must be aborted
D) inversion technique can be used

ANSWER= (A) there must be a fixed number of resources to allocate

 

19. An un-interruptible unit is known as :

A) single
B) atomic
C) static
D) None of these

ANSWER= (B) atomic

 

20. Semaphore is a/an _______ to solve the critical section problem.

A) hardware for a system
B) special program for a system
C) integer variable
D) None of these

ANSWER= (C)  integer variable

 

21. Context switching is part of

A) Interrupt servicing
B) Interrupt handling
C) Polling
D) Spooling

ANSWER= (B) Interrupt handling

 

22. The hardware mechanism that allows a device to notify the CPU is called _______.

A) polling
B) interrupt
C) driver
D) controlling

ANSWER= (B) interrupt

 

23. _____ may be the first elementary Operating System.

A) Resident System
B) Resident Monitor
C)  Resident Operator
D) Resident Computer

ANSWER= (B) Resident Monitor

 

24. ____ is an example of single user Operating System.

A) Ms-Dos
B) Linux
C) Unix
D) Basic

ANSWER= (A) Ms-Dos

 

25. What does Belady’s Anomaly related to ?

A) Page Replacement Algorithm
B) Memory Management Algorithm
C) Deadlock Prevention Algorithm
D) Disk Scheduling Algorithm

ANSWER= (A) Page Replacement Algorithm

 

26. The ___ program is not allowed to read data from the disk.

A) OS
B) Application
C) System
D) Resident Monitor

ANSWER= (B) Application

 

27. Multiprogramming systems:

A) Are easier to develop than single programming systems
B) Execute each job faster
C) Execute more jobs in the same time period
D) GATE PASS IT PRODUCT

ANSWER= (C) Execute more jobs in the same time period

 

28. _____ is a way of dealing with dedicated I/O devices in a multiprogramming system.

A) System call
B) Spooling
C) Storage
D) Buffer

ANSWER= (B) Spooling

 

29. A page fault occurs when

A) the Deadlock happens
B) the Segmentation starts
C) the page is not found in the memory
D) the page is not found in the memory

ANSWER= (D) the page is not found in the memory

 

30. The eye is an interface between the object and the part of the brain that processes ____

A) Visual data
B) Graphic data
C) Audio data
D) Text data

ANSWER= (A) Visual data

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