Practice Operating Systems Concepts Multiple Choice Questions with Answers Quiz-6

Q.1.

The working set theory of programming behaviour of processes running within an operating system involves

the collection of pages that a process accesses
disk scheduling mechanisms
coalescing holes in memory
assigning the CPU to processes
None of the above

Q.2.

The Memory Address Register

is a hardware memory device which denotes the location of the current instruction being executed.
is a group of electrical circuits (hardware), that performs the intent of instructions fetched from memory.
contains the address of the memory location that is to be read from or stored into.
contains a copy of the designated memory location specified by the MAR after a "read" or the new contents of the memory prior to a "write".
None of the above

Q.3.

Which of the following statements is false?

a small page size causes large page tables
internal fragmentation is increased with small pages
a large page size causes instructions and data that will not be referenced brought into primary storage
I/O transfers are more efficient with large pages
None of the above

Q.4.

Swapping

works best with many small partitions
allows many programs to use memory simultaneously
allows each program in turn to use the memory
does not work with overlaying
None of the above

Q.5.

Operating system is

A collection of hardware components
A collection of input-output devices
A collection of software routines
All of the above
None of the above

Q.6.

Thrashing

is a natural consequence of virtual memory systems
can always be avoided by swapping
always occurs on large computers
can be caused by poor paging algorithms
None of the above

Q.7.

When did IBM release the first version of disk operating system DOS version 1.0?

1981
1982
1983
1984
None of the above

Q.8.

The details of all external symbols and relocation formation (relocation list or map) is provided to linker by

Macro processor
Translator
Loader
Editor
None of the above

Q.9.

The action of parsing the source program into the proper syntactic classes is known as

syntax analysis
lexical analysis
interpretation analysis
general syntax analysis
None of the above

Q.10.

A disk scheduling algorithm in an operating system causes the disk arm to move back and forth across the disk surface in order to service all requests in its path. This is a

First come first served
Shortest Seek Time First (SSTE)
Scan
FIFO
None of the above

Q.11.

A file organization component of a VSAM file is:

relative record data set
keyed sequential data set
entry sequential data set
all of the above
None of the above

Q.12.

Which of the following is false about disk when compared to main memory?

non-volatile
longer storage capacity
lower price per bit
faster
None of the above

Q.13.

The macro processor must perform

recognize macro definitions and macro calls
save the macro definitions
expand macros calls and substitute arguments
all of the above
None of the above

Q.14.

Which, of the following is not true about the description of a decision table?

A decision table is easy to modify
A decision table is directly understood by the computer
A decision table is easy to understand
All of the above
None of the above

Q.15.

A translator is best described as

an application software
a system software
a hardware component
all of the above
None of the above

Q.16.

What is the name given to the software which can be legally compiled and often used for free?

Shareware program
Public domain program
Firmware program
Mindware
None of the above

Q.17.

Producer consumer problem can be solved using

semaphores
event counters
monitors
all of the above
None of the above

Q.18.

A development strategy whereby the executive control modules of a system are coded and tested first, is known as

Bottom-up development
Top-down development
Left-Right development
All of the above
None of the above

Q.19.

Trojan-Horse programs

are legitimate programs that allow unauthorized access
do not usually work
are hidden programs that do not show up on the system
usually are immediately discovered
None of the above

Q.20.

Data encryption

is mostly used by public networks
is mostly used by financial networks
cannot be used by private installations
is not necessary, since data cannot be intercepted
None of the above

Q.21.

The SJF algorithm executes first the job

that last entered the queue
that first entered the queue
that has been in the queue the longest
with the least processor needs
None of the above

Q.22.

Most of the microcomputer's operating systems like Apple DOS, MS DOS and PC DOS etc. are called disk operating systems because

they are memory resident
they are initially stored on disk
they are available on magnetic tapes
they are partly in primary memory and partly on disk
None of the above

Q.23.

Which of the following is helpful in evaluating applications software what will best suit your needs?

recommendations by other users
computer magazines
objective software reviews
all of the above
None of the above

Q.24.

The CPU, after receiving an interrupt from an I/O device

halts for a predetermined time
hands over control of address bus and data bus to the interrupting device
branches off to the interrupt service routine immediately
branches off to the interrupt service routine after completion of the current instruction
None of the above

Q.25.

What problem is solved by Dijkstra's banker's algorithm?

mutual exclusion
deadlock recovery
deadlock avoidance
cache coherence
None of the above

Explanation

Q.26.

The memory allocation scheme subject to "external" fragmentation is

segmentation
swapping
pure demand paging
multiple contiguous fixed partitions
None of the above

Q.27.

Page stealing

is a sign of an efficient system
is taking page frames from other working sets
should be the tuning goal
is taking larger disk spaces for pages paged out
None of the above

Q.28.

The FIFO algorithm

executes first the job that last entered the queue
executes first the job that first entered the queue
execute first the job that has been in the queue the longest
executes first the job with the least processor needs
None of the above

Q.29.

In virtual memory systems, Dynamic address translation

is the hardware necessary to implement paging
stores pages at a specific location on disk
is useless when swapping is used
is part of the operating system paging algorithm
None of the above

Q.30.

Which of the following systems software does the job of merging the records from two files into one?

Security software
Utility program
Networking software
Documentation system
None of the above

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