Operating System Practice Test 6

Question 1 of 20

1. What is the idea behind thread pools?

all threads in a pool distribute the task equally among themselves

none of the mentioned

when a process begins, a pool of threads is chosen from the many existing and each thread is allotted equal amount of work

a number of threads are created at process startup and placed in a pool where they sit and wait for work

Question 1 of 20

Question 2 of 20

2. Resource sharing helps ___________

share the memory and resources of the process to which the threads belong

all of the mentioned

reduce the address space that a process could potentially use

an application have several different threads of activity all within the same address space

Question 2 of 20

Question 3 of 20

3. The pager concerns with the ____________

entire process

individual page of a process

entire thread

first page of a process

Question 3 of 20

Question 4 of 20

4. The three ways in which a process responds to a signal are ____________

all of the mentioned

handling the signal

performing some default action

ignoring the signal

Question 4 of 20

Question 5 of 20

5. Effective access time is directly proportional to ____________

memory access time

hit ratio

none of the mentioned

page-fault rate

Question 5 of 20

Question 6 of 20

6. Which of the following system calls does not return control to the calling point, on termination?

longjmp

exec

fork

ioctl

Question 6 of 20

Question 7 of 20

7. A heavy weight process ___________

none of the mentioned

can have multiple or a single thread for execution

has multiple threads of execution

has a single thread of execution

Question 7 of 20

Question 8 of 20

8. A thread is also called ___________

None of the mentioned

Heavy Weight Process(HWP)

Process

Light Weight Process(LWP)

Question 8 of 20

Question 9 of 20

9. Which one of the following is not a linux distribution?

multics

open SUSE

gentoo

debian

Question 9 of 20

Question 10 of 20

10. When a web page is loading, and the user presses a button on the browser to stop loading the page?

the thread loading the page does not stop but continues with another task

the thread loading the page is paused

the thread loading the page is cancelled

the thread loading the page continues with the loading

Question 10 of 20

Question 11 of 20

11. In the Many to Many models when a thread performs a blocking system call ___________

other threads only from other processes are allowed to run

none of the mentioned

other threads are strictly prohibited from running

other threads are allowed to run

Question 11 of 20

Question 12 of 20

12. Virtual memory allows ____________

execution of a process that may not be completely in memory

execution of a process without being in physical memory

a program to be smaller than the physical memory

a program to be larger than the secondary storage

Question 12 of 20

Question 13 of 20

13. The One to One model allows ___________

decreased concurrency

concurrency equivalent to other models

increased concurrency

increased or decreased concurrency

Question 13 of 20

Question 14 of 20

14. The replacement of a bad block generally is not totally automatic because ___________

bad block does not contain any data

data in bad block can not be replaced

data in bad block is usually lost

none of the mentioned

Question 14 of 20

Question 15 of 20

15. When a process blocks the receipt of certain signals?

The signals are received until they are unblocked

The signals are received by the process once they are delivered

The signals are not delivered

The signals are delivered

Question 15 of 20

Question 16 of 20

16. Which of the following is not TRUE?

A field is updated in the signal table when the signal is sent

Kernel may send signals internally

Processes may send each other signals

Each signal is maintained by a single bit

Question 16 of 20

Question 17 of 20

17. In most cases, if a process is sent a signal while it is executing a system call ____________

the system call is interrupted by the signal, and the signal handler comes in

none of the mentioned

the system call will continue execution and the signal will be ignored completely

the signal has no effect until the system call completes

Question 17 of 20

Question 18 of 20

18. Each connection arriving at multi threaded servers via network is generally ____________

is kept in a normal queue and then sent to the blocking queue from where it is dequeued

is directly put into the blocking queue

is wrapped as a task and passed on to a thread pool

none of the mentioned

Question 18 of 20

Question 19 of 20

19. Swap space exists in ____________

none of the mentioned

cpu

primary memory

secondary memory

Question 19 of 20

Question 20 of 20

20. If the kernel is single threaded, then any user level thread performing a blocking system call will ___________

cause the thread to block with the other threads running

none of the mentioned

cause the entire process to run along with the other threads

cause the entire process to block even if the other threads are available to run

Question 20 of 20

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