Welcome to Operating System Quiz, Entry Level !!

Question 1. In UNIX, Which command is used to display the top of the file

cat

head

more

grep

Question 2. Round robin scheduling is essentially the preemptive version of

FIFO

Shortest job first

Shortest remaining

Longest time first

Question 3. In the blocked state

the processes waiting for I/O are found

the process which is running is found

the processes waiting for the processor are found

none of the above

Question 4. The problem of thrashing is effected scientifically by

Program structure

Program size

Primary storage size

None of the above

Question 5. Which of the following file name extension suggests that the file is Backup copy of another file

TXT

COM

BAS

BAK

Question 6. If the Disk head is located initially at 32, find the number of disk moves required with FCFS if the disk queue of I/O blocks requests are 98,37,14,124,65,67.

310

324

315

321

Question 7. PCB =

Program Control Block

Process Control Block

Process Communication Block

None of the above

Question 8. The Banker's algorithm is used

to prevent deadlock in operating systems

to detect deadlock in operating systems

to rectify a deadlocked state

none of the above

Question 9. FIFO scheduling is

Preemptive Scheduling

Non Preemptive Scheduling

Deadline Scheduling

Fair share scheduling

Question 10. A binary semaphore

has the values one or zero

is essential to binary computers

is used only for synchronisation

is used only for mutual exclusion