11) A multiplexer is also known as
a) coder
b) decoder
c) data selector
d) multivibrator
12) Logic 1 in + ve logic system is represented by
a) zero level
b) lower voltage level
c) higher voltage level
d) negative voltage
13) Which of the following circuit is called latch
a) AND circuit
b) NAND circuit
c) Flip-flop
d) ROM circuit
14) How many full adders are needed to construct an m-bit parallel adder
a) m/2
b) m
c) m – 1
d) m + 1
15) A gate in which all inputs must be low to get a high output is called a/an
a) inverter
b) NOR gate
c) AND gate
d) NAND gate
16) Zero has two respresentation in
a) sign magnitude
b) 1’s complement
c) 2’s complement
d) both a and b
17) Which of the following is termed as minimum error code?
a) Binary code
b) Gray code
c) Excess 3 code
d) Octal code
18) Which of the following computers is least powerful?
a) Minicomputer
b) micro Computer
c) Main frame computer
d) Super computer
19) The binary equivalent of the decimal number 0.4375 is
a) 0.0111
b) 0.1011
c) 0.1100
d) 0.1010
20) If one of the input to _________ gate is inverted then it becomes an INHIBITOR .
a) AND
b) NAND
C) NOR
d) XOR