MCQs on Digital Electronics


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01․ Queue is also known as
FIFO memory
LIFO memory
Flash memory
LILO memory

Queue is a type of memory based on First In First Out. A data entered first will be read first. i.e The crowd line in front of a bank. The person came first will be served first.

02․ 1 Kilo bits are equal to
1000 bits
1024 bits
1012 bits
1008 bits

In binary, 1 kilo means 210, which is equal to 1024.

03․ A Nibble is equal to ________ bit(s)
1
2
4
8

In digital systems, bit is the smallest unit of storage consisting of either 0 or 1. Grouping of such 4 bits are called nibble and grouping of such 8 bits are called byte.

04․ If J = K (J and K are shorted) in a JK flip-flop, what circuit is made
SR flip-flop
Shorted JK flip-flop
T flip-flop
K flip-flop

A T flip-flop toggles its output when a 1 is provided at input, otherwise output does not change. It is actually a JK flip-flop with the J and K inputs shorted.

05․ In digital systems, 1 byte is equal to ________ bit(s).
1
2
4
8

In digital systems, bit is the smallest unit of storage consisting of either 0 or 1. Grouping of such 4 bits are called nibble and grouping of such 8 bits are called byte.

06․ Which logic family provide minimum power dissipation
TTL
CMOS
ECL
JFET

Complementary Metal Oxide Semiconductor or CMOS technology provides less density as well as less power consumption, because it does not consume any power in the OFF state which is exception from other Transistor devices.

07․ Boolean algebra is also known as
Gate algebra
Transistor algebra
Switching algebra
Counting algebra

Switching algebra is the other name of Boolean Algebra, as it also have only two states either ON or OFF state i.e. 1 or 0.

08․ In a T flip-flop no of input circuit is
1
2
3
4

T flip flop is made from a JK flip-flop by shorting J and K, it accepts only one input either 1 or 0. When T = 0 Output remains the same T = 1, output toggles.

09․ A boolean function can be transformed into logical ________.
graph
map
diagram
matrix

A logical diagram can be constructed from a Boolean function representing input/output by variables. Logical diagram is constructed by logical gates.

10․ The boolean algebra is mostly based on
Boolean theorem
De Morgans theorem
De Morpans theorem
Standard theorem

De Morgans Law or De Morgans Theorem is the basics of the Boolean Algebra.

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