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Computer Science
Dlc ( Digital Logic Circuits )
Quiz 2
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Q.1
When A and B represent the inputs of an Exclusive OR logic gate ,its output O will be
O=AB’+A’B
O=AB+A+B
O=A+B+(AB)'
None of these
Q.2
Which of the following two input logic functions can act as a Universal gate?
A ⊕ B
AB
(A+B)’
None of the above
Q.3
A _________ accepts and/or transfers information serially.
S-R latch
shift register
FPGA
parallel register
Q.4
The ________ flip-flop has two inputs and all possible combinations of input values are valid.
J-K
D
S-R
clocked S-R
Q.5
Which of the following is a functionally complete set?
AND, NOT
NOR
AND, OR, NOT
all of the above
Q.6
The unary operation _________ inverts the value of its operand.
OR
NOT
NAND
XOR
Q.7
The operation _________ yields true if either or both of its operands are true.
NOT
AND
NAND
OR
Q.8
The operand ________ yields true if and only if both of its operands are true.
XOR
OR
AND
NOT
Q.9
A Boolean function can be realized in the sum of products (SOP) form but not in the product of sums (POS) form.
True
False
Q.10
Claude Shannon, a research assistant in the Electrical Engineering Department at M.I.T., proposed the basic principles of Boolean algebra.
True
False
Q.11
Counters can be designated as _________.
a. asynchronous
b. synchronous
c. both asynchronous and synchronous
d. neither asynchronous or synchronous
Q.12
CPUs make use of _________ counters, in which all of the flip-flops of the counter change at the same time.
synchronous
asynchronous
clocked S-R
timed ripple
Q.13
________ is implemented with combinational circuits.
Nano memory
Random access memory
Read only memory
No memory
Q.14
A _______ is an electronic circuit that produces an output signal that is a simple Boolean operation on its input signals.
gate
decoder
counter
flip-flop
Q.15
For more than four variables an alternative approach is a tabular technique referred to as the _________ method.
DeMorgan
Quine-McCluskey
Karnaugh map
Boole-Shannon
Q.16
A _________ is a PLD featuring a general structure that allows very high logic capacity and offers more narrow logic resources and a higher ration of flip-flops to logic resources than do CPLDs.
SPLD
FPGA
PAL
PLA
Q.17
The operation of the digital computer is based on the storage and processing of binary data.
True
False
Q.18
Which of the following is not a combinational circuit?
adder
code convertor
multiplexer
counter
Q.19
Which of the following is a not a characteristics of combinational circuits?
the output of combinational circuit depends on present input
there is no use of clock signal in combinational circuits
the output of combinational circuit depends on previous output
there is no storage element in combinational circuit
Q.20
Which of the following is not a combinational circuit?
adder
code convertor
multiplexer
counter
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