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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.
Which of the following is a voiceband channel?
Telephone line
Telegraph line
Coaxial cable
Microwave systems
None of the above
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Learn more problems on : Networking
2.
How many class A, B, and C network IDs can exist?
2,113,658
16,382
126
128
None of the above
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Learn more problems on : Networking
3.
A 4 KHz noiseless channel with one sample every 125 per sec, is used to transmit digital signals. Find the bit rate (bits per second) that are sent, if CCITT 2.048 Mbps encoding is used.
500 Kbps
32 Kbps
8 Kbps
64 Kbps.
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4.
To set up a bulletin board system you need
a smart modem with auto-answer capabilities
a telephone line
a personal computer
All of the above
None of the above
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5.
What command is used to copy directory structures in and out?
copy
cp - p
cpio
cp
None of the above
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6.
A computer file can be best described as
a single data item
a general collection of data items
an orderly collection of data items
a random collection of data items
None of the above
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Learn more problems on : Database Systems
7.
COM 4 uses which I/O port?
2F8H
3F8H
3E8H
2E8H
None of the above
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Learn more problems on : Computer Hardware
8.
In laser printing, there are six steps the printer follows. What comes between the conditioning phase and the developing phase?
transfer phase
writing phase
fusing phase
cleaning phase
All of the above
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9.
EBCDIC can code up to how many different characters?
8
16
32
64
256
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Learn more problems on : Computer Fundamentals
10.
Which of the following statements is false?
Secondary storage is nonvolatile
Primary storage is volatile
Secondary storage contains data for immediate processing
When the computer is turned off, data and instructions stored in primary storage are erased
All of the above
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11.
A hand-held device for optically reading bar codes on goods, labels & shelves is
Wand
Touch tablet
Mouse
Light pen
None of the above
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12.
A machine associated with card-based data processing is
Codomain
Collator
Cartridge
Digitizer
None of the above
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13.
An example of a global allocation problem is
defining plant capacities
scheduling an entire development project
setting general inventory guidelines
All of the above
None of the above
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14.
Checking the quality of software in both simulated and line environments, is known as
checking
usability
validity
validation
None of the above
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Learn more problems on : System Analysis and Design
15.
The packaged design includes all of the following except;
program flowcharts
system configuration
module descriptions
All of the above
None of the above
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16.
The systems conversion technique of totally removing the existing system and immediately implementing the new system is called as
crash conversion
phased conversion
pilot conversion
parallel run
None of the above
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17.
Which of the following method is used the results of a design analysis as a base for redesign decisions?
The iterative design method
The direct method
The design selection method
All of the above
None of the above
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18.
Which one of the following is a statement of KirchhofFs voltage law?
The total voltage in a parallel circuit is less than the value of the smallest voltage
The algebraic sum of voltages in a loop is equal to zero
The voltage drop across a resistance is proportional to the value of resistance and the amount of current flowing through it
The algebraic sum of voltages entering and leaving a point is equal to zero
None of the above
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19.
An ideal voltage source has
Zero internal resistance
Infinite internal resistance
A load dependent voltage
A load-dependent current
None of the above
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Learn more problems on : Electronic Principles
20.
Which one of the following statements regarding ac circuits is correct?
Current and voltage are in phase through an inductor
Current leads the voltage through an inductor
Current lags the voltage through an inductor
All of the above
None of the above
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Learn more problems on : Electronic Principles
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