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MCQ's on Operating Systems along with answers

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Operating Systems MCQ's Question Set 1

Q.1.  What is operating system?

  1. collection of programs that manages hardware resources
  2. system service provider to the application programs
  3. link to interface the hardware and application programs
  4. all of the mentioned

Answer:- (4)

Q.2. Which one of the following is not true?

  1. kernel is the program that constitutes the central core of the operating system
  2. kernel is the first part of operating system to load into memory during booting
  3. kernel is made of various modules which can not be loaded in running operating system
  4. kernel remains in the memory during the entire computer session

Answer:- (3)

Q.3. What is the main function of the command interpreter?

  1. to get and execute the next user-specified command
  2. to provide the interface between the API and application program
  3. to handle the files in operating system
  4. none of the mentioned

Answer:- (1)

Q.4. If a process fails, most operating system write the error information to a ______

  1. log file
  2. another running process
  3. new file
  4. none of the mentioned

Answer:- (1)

Q.5. The OS X has ____________

  1. monolithic kernel
  2. hybrid kernel
  3. microkernel
  4. monolithic kernel with modules

Answer:- (2)

Q.6. In operating system, each process has its own __________

  1. address space and global variables
  2. open files
  3. pending alarms, signals and signal handlers
  4. all of the mentioned

Answer:- (4)

Q.7. A set of processes is deadlock if __________

  1. each process is blocked and will remain so forever
  2. each process is terminated
  3. all processes are trying to kill each other
  4. none of the mentioned

Answer:- (1)

Q.8. Which system call returns the process identifier of a terminated child?

  1. wait
  2. exit
  3. fork
  4. get

Answer:- (1)

Q.9. The address of the next instruction to be executed by the current process is provided by the __________

  1. CPU registers
  2. Program counter
  3. Process stack
  4. Pipe

Answer:- (2)

Q.10. A Process Control Block(PCB) does not contain which of the following?

  1. Code
  2. Stack
  3. Bootstrap program
  4. Data

Answer:- (3)

Q.11. The number of processes completed per unit time is known as __________

  1. Output
  2. Throughput
  3. Efficiency
  4. Capacity

Answer:- (2)

Q.12. The entry of all the PCBs of the current processes is in __________

  1. Process Register
  2. Program Counter
  3. Process Table
  4. Process Unit

Answer:- (3)

Q.13. Which of the following do not belong to queues for processes?

  1. Job Queue
  2. PCB queue
  3. Device Queue
  4. Ready Queue

Answer:- (2)

Q.14. If all processes I/O bound, the ready queue will almost always be ______ and the Short term Scheduler will have a ______ to do.

  1. full, little
  2. full, lot
  3. empty, little
  4. empty, lot

Answer:- (3)

Q.15. PCB of a process does not contain __________

  1. the value of the CPU registers
  2. the process state
  3. memory-management information
  4. context switch time

Answer:- (4)

Q.16. Which of the following does not interrupt a running process?

  1. A device
  2. Timer
  3. Scheduler process
  4. Power failure

Answer:- (3)

Q.17. When several processes access the same data concurrently and the outcome of the execution depends on the particular order in which the access takes place, is called?

  1. dynamic condition
  2. race condition
  3. essential condition
  4. critical condition

Answer:- (2)

Q.18. Which one of the following is a synchronization tool?

  1. thread
  2. pipe
  3. semaphore
  4. socket

Answer:- (3)

Q.19. Mutual exclusion can be provided by the __________

  1. mutex locks
  2. binary semaphores
  3. both mutex locks and binary semaphores
  4. none of the mentioned

Answer:- (3)

Q.20. Process synchronization can be done on __________

  1. hardware level
  2. software level
  3. both hardware and software level
  4. none of the mentioned

Answer:- (3)

Operating Systems MCQ's Question Set 2

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