Questions 211 to 220
________bits are used to denote a character.
(a) 16 (b) 7 (c) 2 (d) 8 (e) 32.
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The fastest processor chips today have an internal clock rate of at least ______.
(a) 100 MHZ (b) 200 MHZ (c) 400 MHZ (d) 250 MHZ (e) 300 MHZ.
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Octal number 736.4 is converted to decimal as
(a) (475.5)10 (b) (479.5)10 (c) (478.5)10 (d) (476.3)10 (e) (477.5)10.
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Conversion of the decimal 41.6875 into binary number will be
(a) 110001.1101 (b) 10000.1011 (c) 101001.1011
(d) 101101.1011 (e) 101111.1011.
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The addition of two binary numbers in 2’s complement x=1010100 and y=1000011
(a) 11010110 (b) 11110011 (c) 01111011 (d) 10010001 (e) 11000111.
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Floating point is always interpreted to represent a number in the following form
(a) M * re (b) Me * r (c) E r * m (d) M * e (e) Em * r.
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If 1’s are mapped in a k-map the Boolean function is in the form
(a) Sum of products (b) Product of sums
(c) Subtraction and divide (d) Addition and subtraction (e) Sum of sums.
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A combinational circuit that performs the addition of two input bits and a carry from the previous lower significant position is called
(a) Full-adder (b) Half-adder (c) Full-subtractor
(d) Half-subtractor (e) Full-Divider.
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Which of the following gates is called as a universal gate as any digital system can be implemented with it?
(a) AND gate (b) NAND gate (c) OR gate (d) SR gate (e) XOR gate.
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A combinational circuit that converts binary information from n input lines to a maximum of 2n unique output lines is
(a) Decoder (b) Encoder (c) Full adder
(d) Half adder (e) Half-Subtractor.
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Answers
Answer : (d)
Reason : Every character is represented with 8 bits in the main memory
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Answer : (c)
Reason : The fastest processor chips today have an internal clock of at least 200MHZ
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Answer : (c)
Reason : 7*82+3*81+6*80+4*8-1
=7*64+3*8+6*1+0.5
=448+24+6+0.5
=478.5
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Answer : (c)
Reason : The binary equivalent of 41.6875 is (101001.1011) 2
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Answer : (d)
Reason : x= 1010100
The 2’s complement of y is 0111101
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10010001
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Answer : (a)
Reason : Floating point is always interpreted to represent a number in the following form
M*re
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Answer : (a)
Reason : To get the Boolean function in sum of products form we should group 1’s in the k-map.
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Answer : (a)
Reason : Two inputs are directed, one towards XOR gate and towards AND gate and also a combinational circuit that performs the addition o two input bits.
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Answer : (b)
Reason : NAND gate is generally called as universal gate.
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Answer : (a)
Reason : Decoder uses address inputs as binary numbers and produces output signal on.
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