Welcome to Operating System Quiz, Entry Level !!

Question 1. Round robin scheduling is essentially the preemptive version of

FIFO

Shortest job first

Shortest remaining

Longest time first

Question 2. Which directory implementation is used in most Operating System

Single level directory structure

Two level directory structure

Tree directory structure

Acyclic directory structure

Question 3. Which symbol will be used with grep command to match the pattern pat at the beginning of a line

^pat

$pat

pat$

pat^

Question 4. 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 5. Which technique was introduced because a single job could not keep both the CPU and the I/O devices busy

Time-sharing

SPOOLing

Preemptive scheduling

Multiprogramming

Question 6. A page fault occurs

when the page is not in the memory

when the page is in the memory

when the process enters the blocked state

when the process is in the ready state

Question 7. In UNIX, Which command is used to display the top of the file

cat

head

more

grep

Question 8. The problem of thrashing is effected scientifically by

Program structure

Program size

Primary storage size

None of the above

Question 9. 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

Question 10. Multiprogramming systems

Are easier to develop than single programming systems

Execute each job faster

Execute more jobs in the same time

Are used only on large main frame computers