Operating System Practice Test 1

Question 1 of 20

1. In a memory mapped input/output __________

the CPU runs a user written code and does accordingly

the CPU writes one data byte to the data register and sets a bit in control register to show that a byte is available

the CPU uses polling to watch the control bit constantly, looping to see if a device is ready

the CPU receives an interrupt when the device is ready for the next byte

Question 1 of 20

Question 2 of 20

2. The switching of the CPU from one process or thread to another is called ____________

process switch

all of the mentioned

task switch

context switch

Question 2 of 20

Question 3 of 20

3. In multilevel feedback scheduling algorithm ____________

processes are not classified into groups

a process can move to a different classified ready queue

none of the mentioned

classification of ready queue is permanent

Question 3 of 20

Question 4 of 20

4. Which operation is performed by an interrupt handler?

Saving the current state of the system

Once done handling, bringing back the system to the original state it was before the interrupt occurred

All of the mentioned

Loading the interrupt handling code and executing it

Question 4 of 20

Question 5 of 20

5. The interval from the time of submission of a process to the time of completion is termed as ____________

turnaround time

waiting time

throughput

response time

Question 5 of 20

Question 6 of 20

6. What is the full form of RMI?

Remote Method Installation

Remote Memory Installation

Remote Memory Invocation

Remote Method Invocation

Question 6 of 20

Question 7 of 20

7. Which module gives control of the CPU to the process selected by the short-term scheduler?

interrupt

dispatcher

none of the mentioned

scheduler

Question 7 of 20

Question 8 of 20

8. Which one of the following can not be scheduled by the kernel?

process

kernel level thread

user level thread

none of the mentioned

Question 8 of 20

Question 9 of 20

9. The Zero Capacity queue __________

is referred to as a message system with buffering

is referred to as a link

none of the mentioned

is referred to as a message system with no buffering

Question 9 of 20

Question 10 of 20

10. In the Zero capacity queue __________

the sender keeps sending and the messages don't wait in the queue

none of the mentioned

the queue can store at least one message

the sender blocks until the receiver receives the message

Question 10 of 20

Question 11 of 20

11. 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 ________

essential condition

dynamic condition

critical condition

race condition

Question 11 of 20

Question 12 of 20

12. What is Dispatch latency?

none of the mentioned

the speed of dispatching a process from running to the ready state

the time of dispatching a process from running to ready state and keeping the CPU idle

the time to stop one process and start running another one

Question 12 of 20

Question 13 of 20

13. Which one of the following is not true?

kernel is the first part of operating system to load into memory during booting

kernel is made of various modules which can not be loaded in running operating system

kernel is the program that constitutes the central core of the operating system

kernel remains in the memory during the entire computer session

Question 13 of 20

Question 14 of 20

14. A process that is based on IPC mechanism which executes on different systems and can communicate with other processes using message based communication, is called ________

Inter Process Communication

Remote Procedure Call

Remote Machine Invocation

Local Procedure Call

Question 14 of 20

Question 15 of 20

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

empty, lot

empty, little

full, little

full, lot

Question 15 of 20

Question 16 of 20

16. If a process is executing in its critical section, then no other processes can be executing in their critical section. What is this condition called?

synchronous exclusion

asynchronous exclusion

critical exclusion

mutual exclusion

Question 16 of 20

Question 17 of 20

17. In a multiprogramming environment __________

the programs are developed by more than one person

more than one process resides in the memory

the processor executes more than one process at a time

a single user can execute many programs at the same time

Question 17 of 20

Question 18 of 20

18. To enable a process to wait within the monitor __________

a condition variable must be declared as condition

condition variables must be used as boolean objects

semaphore must be used

all of the mentioned

Question 18 of 20

Question 19 of 20

19. The link between two processes P and Q to send and receive messages is called __________

message-passing link

all of the mentioned

synchronization link

communication link

Question 19 of 20

Question 20 of 20

20. How does the Hardware trigger an interrupt?

Executing a special operation called system call

Executing a special program called interrupt program

Sending signals to CPU through a system bus

Executing a special program called system program

Question 20 of 20

» Next - Operating System Practice Test 2