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Online Computer Science Test - Computer Science Test - Random

Instruction:
  • This is a FREE online test. Beware of scammers who ask for money to attend this test.
  • Total number of questions: 20.
  • Time allotted: 30 minutes.
  • Each question carries 1 mark; there are no negative marks.
  • DO NOT refresh the page.
  • All the best!

Marks : 2/20

Total number of questions
20
Number of answered questions
0
Number of unanswered questions
20
Test Review : View answers and explanation for this test.
1.
The difference between a multiplexer and a statistical multiplexer is
Statistical multiplexers need buffers while multiplexers do not need buffers
Multiplexer use X.25 protocol, while statistical multiplexers use the Aloha protocol
Multiplexers often waste the output link capacity while statistical multiplexers optimize its use
Multiplexers use Time Division Multiplexing (TDM) while statistical multiplexers use Frequency Division Multiplexing (FDM)
None of the above
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Networking
2.
Which two commands enable you to move between directories?
CD
CHDIR
MOVE
MOVE DIR
None of the above
Your Answer: Option
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Correct Answer: Option
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Learn more problems on : Disk Operating System (DOS)
3.
IBM released its first PC in 1981. Can you name the operating system which was most popular at that time?
MS-DOS
PC-DOS
OS/360
CP/M
None of the above
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Correct Answer: Option
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Learn more problems on : Operating Systems Concepts
4.
Which, of the following, is true for testing and debugging?
Testing checks for logical errors in the programs, while debugging is a process of correcting those errors in the program
Testing detects the syntax errors in the program while debugging corrects those errors in the program
Testing and debugging indicate the same thing
All of the above
None of the above
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(Not Answered)
Correct Answer: Option
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Learn more problems on : Operating Systems Concepts
5.
Which command is used to display the characteristics of a process?
pid
du
ps
au
None of the above
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Correct Answer: Option
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Learn more problems on : Unix
6.
The time for which a piece of equipment operates is called
Seek time
Effective time
Access time
Real time
None of the above
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Correct Answer: Option
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Learn more problems on : Computer Fundamentals
7.
You have a system that periodically locks up. You have ruled out software, and now suspect that it is hardware. What should you do first that could help you narrow it down to the component at fault?
rotate the RAM
replace the RAM
replace the level 2 cache SIMM
disable the CPU cache in CMOS
replace the CPU
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Computer Hardware
8.
Which component must be vacuumed or replaced during preventative maintenance on a laser printer?
Scanning mirror
Toner cartridge
Ozone filter
All of the above
None of the above
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(Not Answered)
Correct Answer: Option
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Learn more problems on : Computer Hardware
9.
What is the main communication method from one PDA to another PDA?
IR
USB
RS-232
IEEE 1394
None of the above
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Correct Answer: Option
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Learn more problems on : Computer Hardware
10.
You suspect a virus has entered your computer. What will not be affected by the virus?
CMOS
Boot sector
Floppy disks
Program files
None of the above
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Computer Hardware
11.
What could cause a fixed disk error?
CDROM drive not installed
Incorrect CMOS settings
Incorrect RAM settings
All of the above
None of the above
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(Not Answered)
Correct Answer: Option
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Learn more problems on : Computer Hardware
12.
EBCDIC can code up to how many different characters?
8
16
32
64
256
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Learn more problems on : Computer Fundamentals
13.
Which of the following is a part of the Central Processing Unit?
Printer
Keyboard
) Mouse
Arithmetic Logic Unit
None of the above
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Learn more problems on : Computer Fundamentals
14.
The shifting of a program from one of the memory addresses to another is
Data transmission
Data collection
Relocation
Database
None of the above
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Correct Answer: Option
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Learn more problems on : Computer Fundamentals
15.
What is the standard code the computer industry created to represent characters?
DASI
ASSH
ASCII
BASCII
EPROM
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Learn more problems on : Computer Fundamentals
16.
Which of the following functions is/ are performed by the loader?
Allocate space in memory for the programs and resolve symbolic references between object decks
Physically place the machine instructions and data into memory
Adjust all address dependent locations, such as address constants, to correspond to the allocated space
All of the above
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Learn more problems on : Language Processors
17.
The manager, in using the systems approach, should subdivide the firm into subsystems based on
functional areas-marketing, finance, and manufacturing
management levels-strategic, tactical, and operational
resource flows-manpower, money, machines, and material
any of the above represent acceptable subsystem divisions.
None of the above
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Learn more problems on : Management Information Systems
18.
The primary tool used in structured design is a:
structure chart
data-flow diagram
program flowchart
module
None of the above
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Learn more problems on : System Analysis and Design
19.
What logic function is obtained by adding an inverter to the inputs of an AND gate?
OR
NAND
XOR
NOR
None of the above
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(Not Answered)
Correct Answer: Option
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Learn more problems on : Digital Computer Electronics
20.
Conversion of an octal number 74328 to a binary number is
11110001101112
1111000110102
1100110101112
1111111110002
None of the above
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(Not Answered)
Correct Answer: Option
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Learn more problems on : Digital Computer Electronics
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