CBSE Class 10 Computer Science Computer Hardware MCQs

Question. ASCII code isa......... bit code.
a) 1
b) 2
c) 9
d) 8
e) 7

Answer : E

Question. Terminal is a:
a) point at which data enters or leaves the computer
b) device to give power supply to computer
c) the last instruction in a program
d) any input /output device.
e) None of these

Answer : A

Question. 12+12=...........
a) 1
b) 0
c) 2
d) 3
e) None of these

Answer : A

Question. Multiple choice examination answer sheets can be evaluated automically by
a) Optical Character Reader
b) Optical Mark Reader
c) Magnetic tape reader
d) Magnetic ink character reader.
e) None of these

Answer : B

Question. The process of retaining data for future use is called
a) reading
b) storing
c) writing
d) coding
e) None of these

Answer : B

Question. Memories which can be read only are called..............memories
a) ROM
b) RAM
c) PROM
d) EPROM
e) None of these

Answer : A

Question. Magnetic tapes are good storage media for
a) backup and low volume data
b) None of these
c) storing original but low volume data
d) storing original but high volume data
e) backup and high volume data

Answer : E

Question. Which of the following is a computercode
a) EPROM
b) JAVA
c) All of the above
d) EBCDIC
e) None of these

Answer : D

Question. Data is generally coded in 8-bit units, such a unit is also called
a) k
b) byte
c) field
d) Word
e) None of these

Answer : B

Question. Half adder is logic CKT that adds. .........Digit at a time
a) three
b) one
c) Two
d) zero
e) None of these

Answer : C

Question. In 1st Complement a number which is Subtracted from other number is known as..........
a) Carry
b) subtrahend
c) All of this
d) minuend
e) None of these

Answer : D

Question. Pick out the wrong definition :
a) EDP- acronym for Electronic Data Processing
b) COBOL-a language used for business data processing
c) Control unit - heart of a computer.
d) None of these
e) Access time-time needed to access the output

Answer : E

Question. In 2nd Complement a number which is subtracted from other number is known as.............
a) Minuend
b) Subtrahend
c) Carry
d) All of this
e) None of these

Answer : A

Question. Multiplexer means.................
a) One in to many
b) All of these
c) many in to many
d) many in to one
e) None of these

Answer : D

Question. Multiplexers is also known as.
a) adder
b) demux
c) mux
d) subtracter
e) None of these

Answer : C

Question. 110+110=............
a) 3
b) 0
c) 1
d) 2
e) None of these

Answer : D

Question. A bootstrap is:
a) a memory device
b) a device to support the computer
c) an error correction technique
d) a small initialisation program to start up a computer
e) None of these

Answer : D

Question. ..........Are used for converting one type of number system in to other form.
a) half adder
b) logic gate
c) Encoder
d) FA
e) None of these

Answer : C

Question. .......... Are used for converting one type of number system in to the other form
a) logic gate
b) Decoder
c) half adder
d) Full adder
e) None of these

Answer : B

Question. Which of the following would cause quickest acess
a) direct access from a magnetic tape
b) direct access from a cassette tape
c) direct access from a floppy disk
d) direct access from a hard disk
e) None of these

Answer : D

Question. A translator is best described as
a) A hardware component
b) A system software
c) An Application software
d) All of the above
e) None of these

Answer : C

Question. Computer follows a simple principle called GIGO which means:
a) garbage in garbage out
b) garbage input good output
c) great instructions great output
d) good input good output.
e) None of these

Answer : A

Question. Indicate which , of the following is not true about 4GL.
a) Many database management system packages support 4GLs
b) 4GL does not support a high -level of screen interaction
c) A 4GL is a software tool which is written, possibly, in some third generation language
d) All of the above
e) None of these

Answer : B 

Question. The term 'baud' is a measure of the:
a) memory capacity
b) speed at which data travels over the communication line
c) instruction execution time
d) all of the above
e) None of these

Answer : B 

Question. Which of the following is not hardware:
a) Magnetic tape
b) Printer
c) Assembler
d) VDU terminal
e) None of these

Answer : C

Question. Laptop PCs are also known as ___Computers
a) Mainframe
b) Super
c) Notebook
d) personal
e) None of these

Answer : C

Question. After counting 0, 1, 10, 11, 'the next binary number is
a) 100
b) 12
c) 101
d) 110
e) None of these

Answer : A

Question. In positive logic, logic gate 1 corresponds to
a) positive voltage
b) zero voltage level
c) higher voltage level
d) lower voltage level
e) None of these

Answer : C

Question. An AND gate
a) is equivalent to a series switching circuit
b) implements logic addition
c) is an any-or-all gate
d) is equivalent to a parallel switching circuit
e) None of these

Answer : A

Question. The only function of a NOT gate is to
a) stop a signal
b) recomplement a signal
c) act as a universal set
d) invert an input signal
e) None of these

Answer : D

Question. A NOR gate is ON only when all it's inputs are
a) OFF
b) positive
c) higb
d) ON
e) None of these

Answer : A

Question. Karnaugh map (K-map) technique provides a systematic method for simplifying ———
a) multiplexers
b) logic gates
c) All of these
d) None of these
e) Boolean expressions

Answer : E

Question. A octal is group of —— 1's
a) 2
b) 6
c) 8
d) 4
e) None of these

Answer : C

Question. A Register is a group of — —
a) Flip-flops
b) OR & AND gate
c) OR gates
d) All of these
e) None of these

Answer : A

Question. The First Microprocessor was ______
a) 8080
b) Intel 4004
c) 8085
d) 4008
e) None of these

Answer : B

Question. The number system that we use in our day to day life is called the Number System __ .
a) Octal
b) Decimal
c) hexadecimal
d) Binary
e) None of these

Answer : B

Question. The Binary system has base ___ .
a) 2
b) 8
c) 10
d) 16
e) None of these

Answer : A

Question. 8085 was introduced in ___
a) 1971
b) 1972
c) 1976
d) 1978
e) None of these

Answer : C

Question. In logic algebra, variables can assume only two values:either..........or 1.
a) 2
b) 4
c) 3
d) 0
e) None of these

Answer : D

Question. In 1978 Intel introduced the 16 bit Microprocessor 8086 now called as_____
a) APX80
b) M6800
c) ZylogzSOOO
d) Intel 8086
e) None of these

Answer : A

Question. Which is a 8 bit Microprocessor ______
a) Intel 4040
b) Motorala MC-6801
c) Pentium-I
d) 8088
e) None of these

Answer : B

Question. A logic gate is an electronic circuit which
a) None of these
b) allows electron flow only in one direction
c) works on binary algebra
d) alternates between 0&1 values
e) makes logic decisions

Answer : E

Question. Pentium-l, Pentium-ll, Pentium III and Pentium-IV are recently introduced microprocessor by______
a) Motorala
b) None
c) Stephen Mors
d) Intel
e) None of these

Answer : D

Question. The address bus flow in ____
a) unidirection k
b) bidirection
c). Mulidirection
d) Circular
e) None of these

Answer : A

Question. Status register is also called as _______
a) Accumulator
b) None of these
c) Counter
d) Stack
e) flags

Answer : E

Question. The First electronic computer was completed in ___ .
a) 1941
b) 1938
c) 1946
d) 1950
e) None of these

Answer : C

Question. A flip flop has ____ stable status
a) Two
b) five
c) four
d) Three
e) None of these

Answer : D

Question. The Second Generation of computers used ___
a) Transistors
b) IC-Chip
c) Vaccum tubes
d) Microprocessor chip
e) None of these

Answer : A

Question. The binary system use powers of..........for positional values.
a) 16
b) 10
c) 8
d) 2

Answer : D

Question. The fourth Generation began in________
a) 1974
b) 1965
c) 1935
d) 1975
e) None of these

Answer : B

Question. ____is used .to create Large program on internet
a) C++
b) HTML
c) Java script
d) C language
e) None of these

Answer : C