Sunday 28 December 2014

computer Knowledge


1) Which of the following is not hardware:
a) Magnetic tape
 b) Printer
 c) VDU terminal
d) Assembler
Ans. d

2) Pick out the wrong definition :
a) Access time – time needed to access the output
b) EDP- acronym for Electronic Data Processing
c) COBOL – a language used for business data processing
d) Control unit – heart of a computer.
Ans. a

3) Terminal is a:
a) device to give power supply to computer
b) point at which data enters or leaves the computer
c) the last instruction in a program
d) any input /output device.
Ans. b

4) Multiple choice examination answer sheets can be evaluated automically by
a) Optical Mark Reader
 b)Optical Character Reader
c) Magnetic tape reader
e) Magnetic ink character reader.
Ans. a
5) An operating system
a) is not required on large computers b) is always supplied with the copmuter
c) is always supplied with the BASIC
e) consists of programs that help in the operation of computer.
Ans. e

6)Which of the following would cause quickest acess
a) direct access from a magnetic tape
b) direct access from a hard disk
c) direct access from a floppy disk
d) direct access from a cassette tape
Ans. b

7) The process of retaining data for future use is called
a) reading
 b)writing
c)storing
d)coding
Ans. c

8)A file is corrected immediately after the input of a transaction.This is an example of
a) sorting
 b)batching
 c)on-line updating
 d) off-line updating
Ans. c

9)Magnetic tapes are good storage media for
a) backup and low volume data
b)backup and high volume data
c)storing original but low volume data
d)storing original but high volume data
Ans. b

10)Which of the following is a computercode
a) EPROM
b) JAVA
c) EBCDIC
d)None of the above
Ans. c

11)Data is generally coded in 8-bit units, such a unit is also called
a) k
b) Word
c)field
d)byte
Ans. d

12) Half adder is logic CKT that adds. ………Digit at a time
a) Two
b) one
 c) three
 d) zero
Ans. a

13) Half adder consist of. ……&…..Gates
a) EX-OR&AND
b) EX-OR&OR
c) EX-OR&NOT
d) None of this
Ans. a

14)In half adder EX-OR gate O/P is …………
a) Carry
b) Remainder
c) Sum
d) Non of this
Ans. c

15)In half adder AND gate O/P is …………
a) Carry
b) Reminder
c) Sum
d) Non of this
Ans.a

16)Subtract ( 1010)2 from ( 1101 )2 using 1st complement..
a)(1100)2
b)(0011)2
c)(1001)2
d)(0101)2
Ans.b

17)Using 2’s Complement, subtraction, of (1010)2 from (0011)2 is
a) (0111)2
b) (1001)2
c) –(0111)2
d) –(1001)2
Ans.c

18)In 1st Complement a number to be subtracted is known as………
a) Subtrahend
b) Minuend
c) carry
d) none of thi
Ans. a

19)In 1st Complement a number which is Subtracted from other number
Is known as……….
a) Carry
b) subtrahend
c) minuend
d) Non of this
Ans.c

20)In a 2nd Complement a number which is subtracted from other
Number is known as………
a) Carry
b) Subtrahend
c) Minuend
d) None of this
Ans.b



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