DIGITAL ELECTRONICS MCQS SET 12

DIGITAL ELECTRONICS MCQS SET 12

1․ Queue is also known as
a. FIFO memory      b. LIFO memory      c. Flash memory
d. LILO memory
Explain:
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.
 

2․ 1 Kilo bits are equal to
a. 1000 bits  b. 1024 bits         c. 1012 bits        d. 1008 bits
Explain:
In binary, 1 kilo means 210, which is equal to 1024.
 

3․ A Nibble is equal to ________ bit(s)
a. 1       b. 2          c. 4          d. 8
Explain:
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.
 

4․ If J = K (J and K are shorted) in a JK flip-flop, what circuit is made
a. SR flip-flop      b. Shorted JK flip-flop    c. T flip-flop    d. K flip-flop
Explain:
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. 

5․ In digital systems, 1 byte is equal to ________ bit(s).
a. 1           b. 2             c. 4           d. 8
Explain:
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.
 

6․ Which logic family provide minimum power dissipation
a. TTL      b. CMOS         c. ECL              d. JFET
Explain:
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.
 

7․ Boolean algebra is also known as
a. Gate algebra       b. Transistor algebra           c. Switching algebra
d. Counting algebra
Explain:
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.
 

8․ In a T flip-flop no of input circuit is  a. 1       b. 2     c. 3          d. 4
Explain:
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.
 

9․ A boolean function can be transformed into logical ________.
a. graph     b. map           c. diagram         d. matrix
Explain:
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
a. Boolean theorem              b. De Morgans theorem
c. De Morpans theorem       d. Standard theorem
Explain:
De Morgans Law or De Morgans Theorem is the basics of the Boolean Algebra.