Combinational Logic Circuits MCQs

Question 1

How many inputs are required for a 1-of-10 BCD decoder?

Accepted Answer

4

Answer

8

Answer

10

Answer

1

Question 2

Most demultiplexers facilitate which of the following?

Accepted Answer

single input, multiple outputs

Answer

decimal to hexadecimal

Answer

ac to dc

Answer

odd parity to even parity

Question 3

One application of a digital multiplexer is to facilitate:

Accepted Answer

parallel-to-serial data conversion

Answer

code conversion

Answer

parity checking

Answer

data generation

Question 4

Select one of the following statements that best describes the parity method of error detection:

Accepted Answer

Parity checking is best suited for detecting single-bit errors in transmitted codes.

Answer

Parity checking is best suited for detecting double-bit errors that occur during the transmission of codes from one location to another.

Answer

Parity checking is not suitable for detecting single-bit errors in transmitted codes.

Answer

Parity checking is capable of detecting and correcting errors in transmitted codes.

Question 5

A multiplexed display:

Accepted Answer

uses one display to present two or more pieces of information

Answer

accepts data inputs from one line and passes this data to multiple output lines

Answer

accepts data inputs from multiple lines and passes this data to multiple output lines

Answer

accepts data inputs from several lines and multiplexes this input data to four BCD lines

Question 6

When two or more inputs are active simultaneously, the process is called:

Accepted Answer

priority encoding

Answer

first-in, first-out processing

Answer

ripple blanking

Answer

priority decoding

Question 7

Which type of decoder will select one of sixteen outputs, depending on the 4-bit binary input value?

Accepted Answer

hexadecimal

Answer

dual octal outputs

Answer

binary-to-hexadecimal

Answer

hexadecimal-to-binary

Question 8

A circuit that responds to a specific set of signals to produce a related digital signal output is called a(n):

Accepted Answer

encoder

Answer

BCD matrix

Answer

display driver

Answer

decoder

Question 9

Which digital system translates coded characters into a more intelligible form?

Accepted Answer

decoder

Answer

encoder

Answer

display

Answer

counter