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Operating Systems Online MCQs with Answers
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1. Where performance and reliability are both important, RAID level ____ is used.
0
1
2
0+1
None of these
Correct Ans: 0+1
2. RAID level 0+1 is used because, RAID level 0 provides ______ whereas RAID level 1 provides ________.
performance, redundancy
performance, reliability
redundancy, performance
reliability, performance
None of these
Correct Ans: performance, reliability
3. RAID level 5 is also known as :
bit-interleaved parity organization
block-interleaved parity organization
block-interleaved distributed parity
memory-style ECC organization
None of these
Correct Ans: block-interleaved distributed parity
4. RAID level 3 supports a lower number of I/Os per second, because _______________.
every disk has to participate in every I/O request
only one disk participates per I/O request
I/O cycle consumes a lot of CPU time
All of these
None of these
Correct Ans: every disk has to participate in every I/O request
5. Which of the following algorithms tends to minimize the process flow time ?
First come First served
Shortest Job First
Earliest Deadline First
Longest Job First
None of these
Correct Ans: Shortest Job First
6. There are 10 different processes running on a workstation. Idle processes are waiting for an input event in the input queue. Busy processes are scheduled with the Round-Robin timesharing method. Which out of the following quantum times is the best value for small response times, if the processes have a short runtime, e.g. less than 10ms ?
tQ = 15ms
tQ = 40ms
tQ = 45ms
tQ = 50ms
None of these
Correct Ans: tQ = 15ms
7. The strategy of making processes that are logically runnable to be temporarily suspended is called :
Non preemptive scheduling
Preemptive scheduling
Shortest job first
First come First served
None of these
Correct Ans: Preemptive scheduling
8. The FIFO algorithm :
first executes the job that came in last in the queue
first executes the job that came in first in the queue
first executes the job that needs minimal processor
first executes the job that has maximum processor needs
None of these
Correct Ans: first executes the job that came in first in the queue
9. Consider a virtual memory system with FIFO page replacement policy: for an arbitrary page access pattern, increasing the number of page frames in the main memory will
always decrease the number of page faults
always increase the number of page faults
sometimes increase the number of page faults
never affect the number of page faults
None of these
Correct Ans: sometimes increase the number of page faults
10. Consider 3 CPU intensive processes, which require 10,20 and 30 time units and arrive at time 0,2 and 6 respectively. How many context switches are needed , if the operating system implements a shortest remaining time first scheduling algorithm? Do not count the context switches at time zero and at the end
1
2
3
4
None of these
Correct Ans: 2
11. The data blocks of a very large file in the Unix file system are allocated using
contiguous allocation
linked allocation
indexed allocation
an extension of indexed allocation
None of these
Correct Ans: an extension of indexed allocation
12. A thread is usually defined as a light weight process because an operating system maintains smaller data structures for a thread than for a process. In relation to this, which of the following is true?
On per thread basis, the operating system maintains only cpu register state
The OS does not maintain a separate stack for each thread.
On per thread basis, the operating system does not maintain virtual memory system
On per thread basis, the operating system maintains only scheduling and accounting information.
None of these
Correct Ans: On per thread basis, the operating system maintains only cpu register state
13. The essential contents in each entry of a page table is/are
Virtual Page number
Page frame number
both Virtual and page frame number
access right information
None of these
Correct Ans: Page frame number
14. Consider an OS capable of loading and executing a single sequential user process at a time. The disk head scheduling algorithm used is FCFS. If FCFS is replaced by shortest seek time first (SSTF), claimed by the vendor to give 50% better benchmark results, what is the expected improvement in the IN/OUT performance of user programs?
50%
40%
25%
0%
None of these
Correct Ans: 0%
15. Which of the following statements are true? <br>I. Shortest remaining time first scheduling may cause starvation. <br>II. preemptive scheduling may cause starvation. <br>III. Round robin is better than FCFS in terms of response time.
I only
I and III
II and III
I, II , III
None of these
Correct Ans: I, II , III
16. Consider the following statements with respect to user level threads and kernel supported threads;1. Context switch is faster with kernal supported threads. <br>2. For user level threads, a system call can block the entire process <br>3. Kernel supported threads can be scheduled independently <br>4. User level threads are transparent to kernel. <br>Which of the above statements are true ?
2,3 and 4
2 and 3
1 and 3
1 and 2
None of these
Correct Ans: 2 and 3
17. Using a larger block size in a fixed block size file system leads to
better disk throughput but poorer disk space utilization
better disk throughput and better disk space utilization
poor disk throughput but better disk space utilization
poor disk throughput and poor disk space utilization
None of these
Correct Ans: poor disk throughput and poor disk space utilization
18. Consider a set of n tasks with known runtimes r1,r2, …. rn to be run on a uniprocessor machine. Which of the following processor scheduling algorithms will result in the maximum throughput ?
round robin
shortest job first
highest response ratio next
first come first serve
None of these
Correct Ans: shortest job first
19. List I contains some CPU scheduling algorithms and List II contains some applications. Match entries in List I to entries in List II using the codes given below the list<br><br>List I _______ List II<br>P) Gang scheduling _______ 1.Guaranteed scheduling<br>Q) Rate monotonic scheduling _______ 2. Real time scheduling<br>R) fair share scheduling _______ 3. Thread scheduling
P-3, Q-2, R-1
P-2, Q-3, R-1
P-2, Q-1, R-3
P-1, Q-3, R-2
None of these
Correct Ans: P-3, Q-2, R-1
20. A system uses FIFO policy for page replacement. It has 4 pages frames with no pages loaded to begin with. The system first access 100 distinct pages in some order and then access the same 100 pages but now in reverse order. How many page faults will occur ?
196
192
197
195
None of these
Correct Ans: 196
21. In a system with 32 bit virtual addresses and 1 kb page size, use of one level page tables for virtual to physical address translation is not practical because
large amount of internal fragmentation
large amount of external fragmentation
large memory overhead in maintaining page table
large computation overhead in the translation process
None of these
Correct Ans: large memory overhead in maintaining page table
22. Cycle stealing is a term closely associated with-
DMA
Virtual Memory
Processor Scheduler
Disk manager
None of these
Correct Ans: DMA
23. Page fault frequency in an operating system is reduced when the
processes tend to be of an equal ratio of the I/O-bound and CPU-bound
size of pages is increased
locality of reference is applicable to the process
processes tend to be CPU-bound
None of these
Correct Ans: locality of reference is applicable to the process
24. In which of the following page replacement policies Belady’s anomaly does not occurs? <br><br>(A) FIFO (B) LRU (C) LFU (D) NRU
All of the above
B, C and D
A and B
Only A
None of these
Correct Ans: B, C and D
25. Which of these is a technique of improving the priority of process waiting in Queue for CPU allocation
Starvation
Relocation
Promotion
Ageing
None of these
Correct Ans: Ageing
26. The total time to prepare a disk drive mechanism for a block of data to be read from is its
Access Time
Seek time
latency plus seek time
Access time plus seek time plus transmission time
None of these
Correct Ans: latency plus seek time
27. Before proceeding with its execution, each process must acquire all the resources it needs is called
pre-emption.
circular wait.
hold and wait
deadlock
None of these
Correct Ans: hold and wait
28. A critical section is a program segment
which is having a higher priority.
where shared resources are accessed.
which forces deadlocks.
where code is shared by programs.
None of these
Correct Ans: where shared resources are accessed.
29. Which scheduling policy is used for a batch processing operating system
Shortest-job First.
Round-Robin.
Priority Based
First-Come-First-Serve.
None of these
Correct Ans: First-Come-First-Serve.
30. Which of the following approaches require knowledge of the system state?
deadlock detection.
deadlock prevention.
deadlock avoidance.
all of the above.
None of these
Correct Ans: all of the above.
31. Which of the following is a fundamental process state
blocked
executing
Waiting
swapped
None of these
Correct Ans: executing
32. The scheduling in which CPU is allocated to the process with least CPU-burst time is called
Priority Scheduling
Round Robin Scheduling
Multilevel Queue Scheduling
Shortest job first Scheduling
None of these
Correct Ans: Shortest job first Scheduling
33. A scheduler which selects processes from Primary memory is called
Long Term Scheduler
Medium Term Scheduler
Short Term Scheduler
Job Scheduler
None of these
Correct Ans: Short Term Scheduler
34. Interval between the time since submission of the job to the time its results become available, is called
Response Time
Throughput
Waiting time
Turnaround Time
None of these
Correct Ans: Response Time
35. As a rule of thumb what percentage of the CPU bursts should be shorter than the time quantum?
80%
70%
60%
50%
None of these
Correct Ans: 80%
36. What is the duration of a time quantum in Round-Robin Scheduling?
10-100 millisec
10-100 nanosec
100-1000 millisec
100-1000 nanosec
None of these
Correct Ans: 10-100 millisec
37. Which of these is a disadvantage of first Come First Serve?
Convoy Effect
Small average and worst-case waiting times
Simplicity
non-preemptive
None of these
Correct Ans: Convoy Effect
38. Which of these is not a goal of Scheduling Algorithm for Different Operating Systems
Fairness
balance
maximize throughput
Policy enforcement
None of these
Correct Ans: maximize throughput
39. Which of these is incorrect in context of Real Time Operating System?
Permits creation of multiple processes within an application.
Permits priorities to be assigned to the processes.
Doesn’t allow programmer to define interrupts and interrupt processing routines
Provides fault tolerance and graceful degradation capabilities.
None of these
Correct Ans: Doesn’t allow programmer to define interrupts and interrupt processing routines
40. Which of these are the reasons for CPU-bound programs having higher priority than the I/O bound programs
CPU utilization is better in CPU-bound programs
I/O bound programs do not get an opportunity to be executed
Period of concurrent CPU and I/O bound activities is rare.
All of the above
None of these
Correct Ans: All of the above
41. Throughput of a multiprogramming OS that processes n programs over the period of time that starts t0 and ends at tf is
(tf-t0)/n
tf*n/t0
n/(tf-t0)
n*tf*t0
None of these
Correct Ans: n/(tf-t0)
42. Which of the following should be a privileged instruction-
Load Bound registers
Load a value in a CPU Register
Forcibly terminate a process
All of the above
None of these
Correct Ans: All of the above
43. Contents of which fields of Program Status Word (PSW) define the subsequent actions of the CPU
Condition code, Privileged mode, Program Counter
Condition code, Privileged mode, interrupt mask
Privileged mode, interrupt mask, interrupt code
Privileged mode, interrupt mask, Program Counter
None of these
Correct Ans: Privileged mode, interrupt mask, Program Counter
44. An Intel processor uses a cache block size of 128 bytes and a memory transfer to cache is about 10 times the access time of cache memory. with cache hit ratio of 0.97 what percent will be the effective memory access to that of access time of memory
20 percent
30 percent
40 percent
50 percent
None of these
Correct Ans: 40 percent
45. Processor architectures use several levels of cache memories to reduce the effective memory access time. which is the correct match <br><br>i) L1 Cache —— a) part of memory chip <br>ii) L2 Cache —— b) Cache on CPU Chip <br>iii) L3 Cache —— c) Cache external to CPU
i)-a ii)-b iii)-c
i)-b ii)-c iii)-a
i)-c ii)-b iii)-a
i)-c ii)-a iii)-b
None of these
Correct Ans: i)-b ii)-c iii)-a
46. Which term means to access some data and instructions repeatedly?
spatial locality
temporal locality
reference locality
access locality
None of these
Correct Ans: temporal locality
47. Programs tend to make memory accesses that are in proximity of previous access this is called
spatial locality
temporal locality
reference locality
access locality
None of these
Correct Ans: spatial locality
48. If ttra and tcam are the time taken to transfer a block from memory to cache and access time of cache memory respectively, then what will be the effective memory access time if h is the hit ratio
h+ ttra *(1+ tcam)
h*tcam +(1-h) *(ttra+tcam)
h +(1-h) *(ttra+tcam)
(h+1)*tcam +(1-h) *(ttra+tcam)
None of these
Correct Ans: h*tcam +(1-h) *(ttra+tcam)
49. Which OS employs the techniques of fault tolerance and graceful degradation to ensure continuity of operation?
Batch Processing
Real time
Distributed
Time sharing
None of these
Correct Ans: Real time
50. What feature of RTOS is supported by executing parts of a computation in different computer systems?
Computation speed up
Resource sharing
Reliability
Communication
None of these
Correct Ans: Computation speed up
51. Applications like Banking and reservations require which type of OS?
Real Time
Hard Real Time
Soft Real Time
All of above
None of these
Correct Ans: Soft Real Time
52. What are the functions of multiprogramming OS?
Scheduling
Memory Management
I/O management
All of above
None of these
Correct Ans: All of above
53. What in multiprogramming OS provides a foolproof method of implementing memory protection to avoid program interference?
Direct Memory Access
Privileged mode
Memory Protection
Both (b) and (c)
None of these
Correct Ans: Both (b) and (c)
54. This OS interleaves execution of processes in an application program to meet its deadline
Batch Processing
Real time
Multiprogramming
Time sharing
None of these
Correct Ans: Real time
55. Which operating system implementation has to focus on the issue of resource sharing?
Batch Processing
Multiprogramming
Distributed
Time sharing
None of these
Correct Ans: Distributed
56. Program Priorities, Preemption are the key concepts of
Batch Processing
Real time
Multiprogramming
Time sharing
None of these
Correct Ans: Multiprogramming
57. Which operating system implementation has to focus on the issue of Good response time
Batch Processing
Multiprogramming
Distributed
Time sharing
None of these
Correct Ans: Time sharing
58. Transparency is a desirable feature of which type of Operating system
Batch Processing
Real time
Distributed
Time sharing
None of these
Correct Ans: Distributed
59. Which of these is not a term describing the collection of Operating Programs
Monitor
Kernel
Supervisor
Server
None of these
Correct Ans: Server
60. Blocking and Caching are the terms associated with which Operating system functions respectively
Memory management and Disk Scheduling
IOCS and Disk Scheduling
IOCS and Memory management
Process management and IOCS
None of these
Correct Ans: IOCS and Disk Scheduling
61. Which of these is/are the desirable features of an Operating system
Extensible
Portable
Reliable
All of the above
None of these
Correct Ans: All of the above
62. Which concept explains the working of an Operating System?
It is event driven
It is object oriented
It is procedure based system software
It is a collection of procedures that interact with each other
None of these
Correct Ans: It is event driven
63. Which of these is an example of a virtual resource?
Print server
Virtual machine
Virtual memory
All of the above
None of these
Correct Ans: All of the above
64. Pool based allocation of memory achieves better usage. Memory can be preempted from inactive programs and used to accommodate active programs. This is called
Preemption
Swapping
Spooling
Scheduling
None of these
Correct Ans: Swapping
65. In round robin CPU scheduling as time quantum is increased the average turnaround time
increases
decreases
remains constant
varies irregularly
None of these
Correct Ans: varies irregularly
66. Resources are allocated to the process on non-sharable basis is
mutual exclusion
hold and wait
no pre-emption
circular wait
None of these
Correct Ans: mutual exclusion
67. Preemptive scheduling is the strategy of temporarily suspending a running process
before the CPU time slice expires
to allow starving processes to run
when it requests I/O
to avoid collision
None of these
Correct Ans: before the CPU time slice expires
68. Consider a system having m resources of the same type. These resources are shared by 3 processes A, B and C which have peak demands of 3, 4 and 6 respectively. For what value of m deadlock will not occur ?
7
9
10
13
None of these
Correct Ans: 13
69. Which of the following memory allocation scheme suffers from external fragmentation ?
Segmentation
Pure demand paging
Swapping
Paging
None of these
Correct Ans: Segmentation
70. 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.
239
310
321
325
None of these
Correct Ans: 321
71. Which of the following operating system is beyond the ownership of any company?
UNIX
LINUX
Windows 2000
Mac
None of these
Correct Ans: UNIX
72. All parts of computer are operated by CPU and the system through which it happens is known as
CU
Mouse
Operating System
Keyboard
None of these
Correct Ans: Operating System
73. Multiprogramming and Multitasking are synonymous
always
never
or dependent
application specific
None of these
Correct Ans: never
74. The technique that extends storage capacities of main memory beyond the actual size of the main memory is called
multitasking
virtual storage
multiprocessing
multiprogramming
None of these
Correct Ans: virtual storage
75. When you delete files in windows operating system, they are
delete permanently
put in recycle bin
wiped thoroughly so that nobody is able to recover the file back
delete permanently and also wiped clean
None of these
Correct Ans: delete permanently
76. The date command at the DOS prompt enables you to
view the date and time
change the date
change the date and time
change the day only
None of these
Correct Ans: view the date and time
77. Which of the following is not as language for computer programming
Windows
Pascal
Basic
Cobaol
None of these
Correct Ans: Windows
78. The term ‘access time’ means
a register or storage location that forms the result of an arithmetic or logic operation
the elapsed time between the instant when data are called for from a storage device and the instant when the delivery operating is completed
to locate the desired data
All of the above
None of these
Correct Ans: the elapsed time between the instant when data are called for from a storage device and the instant when the delivery operating is completed
79. What is an operating system?
It is an interface between user and the computer
It manages all resources
It does all process management tasks
All of the above
None of these
Correct Ans: All of the above
80. Windows 95 is a
operating system
Window environment
integration of OS and windows
software
None of these
Correct Ans: operating system
81. Which of the following are the functions of DOS? <br>A. Controlling the input and output operations. <br>B. Controlling the interaction between the user and the computer. <br>C. Controlling the process of stoning and organising different files.
Only A
Only A and B
Only B and C
All A, B and C
None of these
Correct Ans: All A, B and C
82. The storage device used to compensate for the difference in rates of flow of data from one device to another is termed as
chip
channel
floppy
buffer
None of these
Correct Ans: buffer
83. Which of the following is not a usual file extension in DOS
EXE
BAT
0
Class
None of these
Correct Ans: BAT
84. One following statements is incorrect on MS DOS?
MS DOS is a command driven operating system
MS DOS is a Windows driven operating system
MS DOS exhibits a system prompt which is normally represented nted as C:\>
MS DOS is made up of external and integral commands
None of these
Correct Ans: MS DOS is a Windows driven operating system
85. A(n) ___________________ is a program that makes the computer easier to use.
operating system
application
utility
network
None of these
Correct Ans: operating system
86. The UNIX operation system is suitable for ______________
Single user
Multi user
Real-Time Processing
Distributed Processing
None of these
Correct Ans: Multi user
87. The operating system that is self-contained in a device and resident in the ROM is __________________
Batch Operating System
Real-time Operating System
Embedded Operating System
Multiprocessor Operating System
None of these
Correct Ans: Embedded Operating System
88. The time for the actual data transfer after receiving the request for data from secondary storage is referred to as the disk’s ______________
transfer time.
movement time.
access time.
data input time.
None of these
Correct Ans: access time.
89. Ubuntu is which type of operating system _________
Open Access
Open Source
Windows Based
Mac Based
None of these
Correct Ans: Open Source
90. When a computer is first turned on or restarted, a special type of absolute loader called ____ is executed
Bootstrap loader
Boot loader
Compile and Go loader
Relating loader
None of these
Correct Ans: Bootstrap loader
91. The operating system manages
Processes
Memory
Disks and I/O devices
all of the above
None of these
Correct Ans: all of the above
92. What should be the extension to execute files?
COM
EXE
BAT
All of the above
None of these
Correct Ans: All of the above
93. What is the function of an operating system?
Takes care of scheduling jobs for execution
Manages computer’s resources very efficiently
Manages the flow of data and instructions
All of the above
None of these
Correct Ans: All of the above
94. Which of the following Operating systems is better for implementing a Client-Server network?
Windows 2000
Windows 98
MS DOS
Windows 95
None of these
Correct Ans: Windows 2000
95. Which Operating System doesn’t support networking between computers?
Windows NT
Windows 2000
Windows 95
Windows 3.1
None of these
Correct Ans: Windows 3.1
96. Usually, in MSDOS, the primary hard disk drives has the drive letter ____
A
B
C
D
None of these
Correct Ans: C
97. Which Operating System doesn’t support long file names?
Windows 95
Windows NT
MS-DOS
OS/2
None of these
Correct Ans: MS-DOS
98. Which file keeps commands to execute automatically when OS is started?
command.com
any batch file
config.sys
autoexec.bat
None of these
Correct Ans: autoexec.bat
99. Which is not the function of the Operating System?
Memory management
Disk management
Virus Protection
Application management
None of these
Correct Ans: Virus Protection
100. Which is the layer of a computer system between the hardware and the user program
System environment
Operating environment
Operating system
Software Environment
None of these
Correct Ans: Operating system
101. Multiprogramming systems:
Are easier to develop than single programming systems
Execute each job faster
Execute more jobs in the same time period
Are used only one large mainframe computers.
None of these
Correct Ans: Execute more jobs in the same time period
102. Which is the first program run on a computer when the computer boots up?
System operations
System software
Operating system
Hardware
None of these
Correct Ans: Operating system
103. Which of the following Operating System does not implement multitasking truly?
Windows XP
MS DOS
Windows 98
Windows NT
None of these
Correct Ans: MS DOS
104. The primary purpose of an operating system is:
To keep systems programmers employed
To make the most efficient use of the computer hardware
To make computers easier to use
To allow people to use the computer
None of these
Correct Ans: To make the most efficient use of the computer hardware
105. The operating system creates _____ from the physical computer
Virtual device
Virtual space
Virtual computers
Virtual memory
None of these
Correct Ans: Virtual computers
106. Which runs on computer hardware and serve as platform for other software to run on?
Application Software
Operating System
System Software
All of these
None of these
Correct Ans: Operating System
107. ______ is used in operating system to separate mechanism from policy
Multi level implementation
Two level implementation
Single level implementation
Zero level implementation
None of these
Correct Ans: Two level implementation
108. ______ shares characteristics with both hardware and software
Operating system
Software
Data
Instruction
None of these
Correct Ans: Operating system
109. Which is built directly on the hardware?
Operating System
Database System
Application Software
Computer Environment
None of these
Correct Ans: Operating System
110. What year was the first version of Windows introduced?
1978
1985
1991
1994
None of these
Correct Ans: 1985
111. DOS was the first widely-installed operating system for personal computers. What does DOS stand for?
Digital Operating System
Disk Operating System
Desktop Operating System
It’s an abbreviation of the word “doors.”
None of these
Correct Ans: Disk Operating System
112. What does the “X” stand for in OS X?
extreme
extensible
extra
ten
None of these
Correct Ans: extensible
113. Computer use_____number system to store data and perform calculations
Binary
Octal
Decimal
Hexadecimal
None of these
Correct Ans: Binary
114. Which device can understand the difference between data and programs?
Input device
Output device
Memory
Microprocessor
None of these
Correct Ans: Microprocessor
115. The simultaneous execution of two or more instructions is called
Sequential access
Reduced instruction set computing
Multiprocessing
Disk mirroring
None of these
Correct Ans: Multiprocessing
116. ____________ is a procedure that requires users to enter an identification code and a matching password.
Paging
Logging on
Time-sharing
Multitasking
None of these
Correct Ans: Logging on
117. Time during which a job is processed by the computer is_________.
Execution Time
Delay Time
Real Time
Waiting Time
None of these
Correct Ans: Execution Time
118. When your computer stops working suddenly, it is referred to as a
Crash
Die
Death
Penalty
None of these
Correct Ans: Crash
119. Two basic types of OS are
batch and interactive
sequential and real-time
batch and time-sharing
sequential and direct
batch and sequential
Correct Ans: batch and interactive
120. A program written in a high-level language is a
Compiled program
Source program
Objective program
All the above
None of these
Correct Ans: Source program
121. Which of the following is represented by cluster in a hard disk?
Group of sectors
Total number of sectors in a disk
Total number of tracks
All the above
None of these
Correct Ans: Total number of sectors in a disk
122. Unix operating system was developed by
Walter Baatain
John Bardeen
Ken Thompson
All the above
None of these
Correct Ans: Ken Thompson
123. The data on the tracks of a magnetic disk is written as
zero or one
up or down
high or low voltage
high or low data rate
tiny magnetic spots
Correct Ans: tiny magnetic spots
124. Which of the following files plays an important role in booting DOS?
DOSKEY.EXE
MSCDEX.EXE
CONFIG.SYS
DRIVER.SYS
None of these
Correct Ans: CONFIG.SYS
125. The ___________ button on the Quick Access Toolbar allows you to cancel your recent commands or actions.
search
cut
document
undo
None of these
Correct Ans: undo
126. ______________ are words that a programming language has set aside for its own use.
Control words
Reserved words
Reserved keys
Control structures
None of these
Correct Ans: Reserved words
127. This command is used to remove text or graphics from a document. The information is then stored on a clipboard so you can paste it
chop
cut
clip
cart away
None of these
Correct Ans: cut
128. Language used in a computer that is similar to the languages of humans and is easy to understand is referred to as _______________.
Source code
High level language
Machine language
Object code
None of these
Correct Ans: High level language
129. Data can be arranged in a worksheet in an easy to understand manner using.
Auto formatting
Applying Styles
Changing fonts
Synchronisation
None of these
Correct Ans: Auto formatting
130. Features of windows XP professional includes __________ ?
remote desktop support
System restore
advanced networking features
All of the above
None of these
Correct Ans: All of the above
131. The most recent version of the Mac OS is based on the __________ operating system.
Windows
Linux
Unix
CMOS
None of these
Correct Ans: Unix
132. Which command allows you to reduce fragments of file and optimize the performance of disk ?
Scandisk
Diskcomp
Chkdsk
Defrag
None of these
Correct Ans: Defrag
133. This part of operating system manages the essential peripherals, such such as the keyboard, Screen, disk drives and parallel and serial ports _______________.
Basic input/output
Secondary System
Peripheral System
Marginal System
None of these
Correct Ans: Basic input/output
134. File _________ shrinks the size of a file so it requires less storage space.
scanning
synthesizing
defragmenting
compression
None of these
Correct Ans: compression
135. Which process checks to ensure the components of the computer are operating and connected properly ?
Booting
Processing
Saving
Editing
None of these
Correct Ans: Booting
136. A collection of program that controls how your computer system runs and processes information is called _________.
Operating System
Computer
Office
Compiler
Interpreter
Correct Ans: Operating System
137. Which of the following is also known as brain of computer ?
Control unit
Central Processing unit
Arithmetic and language unit
Monitor
None of these
Correct Ans: Central Processing unit
138. The lowest form of Computer language is called __________.
BASIC
FORTRAN
Machine Language
COBOL
None of these
Correct Ans: Machine Language
139. A program written in machine language is called ?
Assembler
Object
Computer
Machine
None of these
Correct Ans: Assembler
140. _____ translates and executes program at run time line by line
Compiler
Interpreter
Linker
Loader
None of these
Correct Ans: Interpreter
141. The ________ becomes different shapes depending on the task you are performing?
Active tab
Insertion point
Mouse pointer
Ribbon
None of these
Correct Ans: Ribbon
142. Whose trademark is the operating system UNIX?
Motorola
Microsoft
BELL Laboratories
Ashton Tate
None of these
Correct Ans: BELL Laboratories
143. Direct Access Storage Device is also referred as ?
DAST
DISD
DASD
DSER
None of these
Correct Ans: DASD
144. The control of the jobs running within a system is
Job monitoring
Job stream
Job min
Job step
None of these
Correct Ans: Job monitoring
145. The minimum time delay required between the initiation of two successive memory operations is known as
memory cycle time
memory access time
transmission time
waiting time
None of these
Correct Ans: memory cycle time
146. Plotter accuracy is measured in terms of repeatability and
buffer size
resolution
vertical dimension
intelligence
None of these
Correct Ans: resolution
147. A memory in which the information is stored last is on top & is retrieved first is known as
PROM
Buffer
Stack
RAM
None of these
Correct Ans: Stack
148. A computer will function only if it
has a control unit
is given input data
has a program in its memory
has software package
None of these
Correct Ans: has a program in its memory
149. Stand alone programs refer to:
Executable programs
Source programs
Object programs
Direct programs
Indirect programs
Correct Ans: Executable programs
150. State the correct external command?
Chkdsk.exe
Attrib.exe
Restore.exe
Backup.exe
All of the above
Correct Ans: Chkdsk.exe
151. ___________ is the situation in which a process is waiting on another process, which is also a waiting on another process which is waiting on the first process. None of the processes involved in this-circular wait are making progress.
Deadlock
Starvation
Dormant
All of these
None of these
Correct Ans: Deadlock
152. Round robin Scheduling is essentially the preemptive version of ________
FIFO
Shortest job first
Shortest remaining
Longest time first
None of these
Correct Ans: FIFO
153. Which of the following is not an advantage of storied programs:
Reliability
Reduction in Operational Costs
The Computers becoming general purpose
Flexible
None of these
Correct Ans: Reduction in Operational Costs
154. Memory:
is an device that performs a sequence of operations specified by instructions in memory
is a sequence of instructions
is the device where information is stored
is Hardware
None of these
Correct Ans: is a sequence of instructions
155. Considered as the critical part of the operating system
The software which monitors the operating system
Considered as the critical part of the operating system
Heart of OS
the set of primitive functions upon which the rest of operating systems functions are built up
Both of the above
Correct Ans: Both of the above
156. Fragmentation is:
Dividing the secondary memory into equal sized fragments
Fragments of memory words used in a page
Fragments of memory words unused in a page
Dividing the secondary memory into external fragments
None of these
Correct Ans: Fragments of memory words unused in a page
157. Concurrent Process are:
process that do not overlap in time
process that overlap in time
process that are executed by a processor at the same time
process that are executed by a processor in overlap
None of these
Correct Ans: process that overlap in time
158. Overlay is:
A part of an operating system
A single contiguous memory that is used in olden days for running large programs by swapping
Overloading the system with many user files
Network Layer
None of these
Correct Ans: A single contiguous memory that is used in olden days for running large programs by swapping
159. Virtual Memory is:
An extremely large main memory
An extremely large secondary memory.
An illusion of an extremely large memory.
Temporary Memory
None of these
Correct Ans: An illusion of an extremely large memory.
160. _______ is the ability of an operating system to control the activities of multiple programs at the same time.
Multitasking
Streamlining
Multiuser
Simulation
None of these
Correct Ans: Multitasking