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Online Tests
ECAT Computer Science Online Test MCQs With Answers
Question # 1
Popular application of flip-flop are.
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counters
shift registers
transfer registers
all of the above
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Question # 2
The function of an OP code is.
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To instruct the CPU
To translate a mnemonic
Operate the I/O devices
To act as a buffer
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Question # 3
In multiprogramming, two or more programs can be executed
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by optimizing compiler
with two computers
simultaneously
concurrently
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Question # 4
AB
16
+ CD
16
= ________
Choose an answer
101111010
2
101111000
2
101111110
2
101101000
2
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Question # 5
The mechanism for reading or writing data in a disk is called
Choose an answer
track
rorational delay
access arm
seek time
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Question # 6
The ability of an object to interpret a message using its own methods is called
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Polymorphism
encapsulation
inheritance
messaging
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Question # 7
Computer follows a simple principle called GIGO which meas
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Garbage input good output
garbage in garbage out
great instruction great output
good input good output
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Question # 8
Boolean
expre
ssion for NOR gate with t
wo inp
uts x and y can be written as.
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x
+ y__
x. y
x +
y
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Question # 9
The electromagnetic or light waves representing data are called:
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Reraction
Information
Signals
None
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Question # 10
The 'Boolean Algebra' is based on the premise that
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there are two states
differential equations can be solved by analog circuits.
either a statement is true or false
arithmetic operations can be carried out
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Question # 11
Management of an operating system is handled by
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by interpreter
the supervisor program
utility program
the CPU
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Question # 12
Which of the following is termed ad minimum error code?
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Binary code
Gary code
Excess 3-code
Octal code
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Question # 13
The most powerful computers are
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Supercomputer
mainframe computers
super minis
super micros
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Question # 14
Which is not associated with the main memory of computer.
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semiconductor memory
core memory
read only memory
sequential memory
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Question # 15
When a bank teller uses a computer terminal to know the balance in a customer's account it is an example of
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on-line updating
off-line processing
on-line processing
on-line query
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Question # 16
___________coding scheme is used by IBM
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Unicode
ASCII
EBCDIC
BCD
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Question # 17
IBM stands for
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International Business Machine
International Binary Machine
Internal Business Machine
International Business Microsoft
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