Operating Systems

Question 1

Operating system is a

Answer 1

software

Question 2

‘Open files’ is a system call provided under _________ of operating
system.

Answer 2

Information management

Question 3

Program under execution is known as __________.

Answer 3

Process

Question 4

_______is a service of memory management of operating system.

Answer 4

Allocate a chunk of memory

Question 5

Windows 98 is a __________ operating system.

Answer 5

Single user multitasking

Question 6

_______ is a free operating system.

Answer 6

Linux

Question 7

In Magnetic tapes __________ access method is used.

Answer 7

Sequential

Question 8

Concentric circles on disk surface are known as _______.

Answer 8

Tracks

Question 9

Time taken to adjust the appropriate sector under read /write head in disk
is called as ____________.

Answer 9

Latency Time

Question 10

Device drivers are ____________

Answer 10

Software Programs

Question 11

A terminal or VDU means _______________.

Answer 11

Visual Display Unit

Question 12

____ is a logical unit of data that operating system defines for its
convenience.

Answer 12

Block

Question 13

In multiprogramming operating system, the number of processes running
simultaneously is known as _______.

Answer 13

Degree of multiprogramming

Question 14

When a process is waiting for an external event like I/O, it is in
___________ state.

Answer 14

Blocked

Question 15

In Non-preemptive philosophy of process scheduling
throughput \_\_\_\_\_\_\_\_\_\_
i) Decreases
ii) Increases
iii) Remains constant
iv) Has no effect

Answer 15

Increases

Question 16

_______ process scheduling is most suitable for real time systems.

i) Slow
ii) Non preemptive
iii) Preemptive
iv) Single

Answer 16

Preemptive

Question 17

_________ is also known as light weight process.

i) Thread
ii) Program
iii) Time slice
iv) Operating system

Answer 17

Thread

Question 18

Operating system maintains all the information about each process in a
data structure called \_\_\_\_\_\_\_\_
i) Process List
ii) Process control block
iii) Process schedule
iv) Process philosophy

Answer 18

Process control block

Question 19

Memory management service of operating system manages allocations of
\_\_\_\_\_\_\_
i) Disk based memory
ii) Tape based memory
iii) Main memory
iv) Flash memory

Answer 19

Main memory

Question 20

________ is a non contiguous real memory management system.

i) Fixed partitioned
ii) Variable partitioned
iii) Single contiguous
iv) Paging

Answer 20

Paging

Question 21

In \_\_\_\_\_\_\_\_\_\_\_ method of memory management system logical divisions
of a program are of variable sizes.
i) Segmentation
ii) Paging
iii) Variable partitioned
iv) Fixed partitioned.

Answer 21

Segmentation

Question 22

Wastage of memory space within the partition is called as __________

i) Compaction
ii) Internal fragmentation
iii) External fragmentation
iv) Dirty page

Answer 22

Internal fragmentation

Question 23

If page size of 4MB memory is 2 kb then the number of higher order bits
on address bus, used to denote page numbers is _________
i) 8
ii) 9
iii) 10
iv) 11

Answer 23

11

Question 24

When a page which is not in main memory is reference then \_\_\_\_\_\_\_\_\_
occurs.
i) Locality of reference
ii) Page fault
iii) Dirty bit
iv) System crash

Answer 24

Page fault

Question 25

_______ cannot work independently.

i) Operating system
ii) Drivers
iii) Virus
iv) Worm

Answer 25

Virus

Question 26

\_\_\_\_\_\_\_\_\_ spread more rapidly in computer networks but do not cause
direct harm to computer system.
i) Worms
ii) Memory resident virus
iii) Boot sector virus
iv) Bomb

Answer 26

Worms

Question 27

\_\_\_\_\_\_\_\_ control in GUI allows to select only one option from the given
options.
i) Check button
ii) Entry box
iii) Push button
iv) Radio button

Answer 27

Radio button

Question 28

\_\_\_\_\_\_\_\_ is generally used in GUI to look at the information which is not
currently visible on screen.
i) Menu bar
ii) Scroll bar
iii) Push button
iv) Check button

Answer 28

Scroll bar

Question 29

________ is not an operating system.

i) DOS
ii) WINDOWS
iii) LINUX
iv) C++

Answer 29

C++

Question 30

\_\_\_\_\_\_\_ is allotted to every process so that a process does not use the
CPU indefinitely.
i) Context
ii) Priority
iii) Time slice
iv) Process control block

Answer 30

Time slice