Practice Digital Electronics Multiple Choice Questions with Answers Quiz-2

Q.1.

The inverter is ___________

NOT gate
OR gate
AND gate
None of the above

Q.2.

Most of the digital computers do not have floating point hardware because

Floating point hardware is costly
It is slower than software
It is not possible to perform floating point addition by hardware
Of no specific reason

Q.3.

Positive logic in a logic circuit is one in which

logic 0 and 1 are represented by 0 and positive voltage respectively
logic 0 and, -1 are represented by negative and positive voltages respectively
logic 0 voltage level is higher than logic 1 voltage level
logic 0 voltage level is lower than logic 1 voltage level.

Q.4.

Digital circuit can be made by the repeated use of ___________

OR gates
NOT gates
NAND gates
None of the above

Q.5.

Pick out the CORRECT statement:

In a positional number system, each symbol represents the same value irrespective of its position
The highest symbol in a position number system as a value equal to the number of symbols in the system
It is not always possible to find the exact binary
Each hexadecimal digit can be represented as a sequence of three binary symbols.

Q.6.

The NAND gate is AND gate followed by ___________.

NOT gate
OR gate
AND gate
None of the above

Q.7.

The NOR gate is OR gate followed by ___________.

AND gate
NAND gate
NOT gate
None of the above

Q.8.

What is/are the configurable functions of each and every IOBs connected around the FPGA device from the operational point of view?

Input operation
Tristate output operation
Bi-directional I/O pin access
All of the above

Q.9.

Among the logic families, the family which can be used at very high frequency greater than 100 MHz in a 4 bit synchronous counter is

TTLAS
CMOS
ECL
TTLLS

Q.10.

In Boolean algebra, the bar sign (-) indicates ___________.

OR operation
AND operation
NOT operation
None of the above

Q.11.

A hexadecimal odometer displays F 52 F. The next reading will be

F52E
G52F
F53F
F53O

Q.12.

The binary code of (21.125)10 is

10101.001
10100.001
10101.010
10100.111

Q.13.

PLA contains

and and or arrays
nand and or arrays
not and and arrays
nor and or arrays

Q.14.

Outputs of the AND gate in PLD is known as

input lines
output lines
strobe lines
control lines

Q.15.

PAL refers to

programmable array loaded
programmable logic array
programmable array logic
programmable and logic

Q.16.

Which type of CPLD packaging can provide maximum number of pins on the package due to small size of the pins?

PLCC
QFP
PGA
BGA

Q.17.

Which is the example of digital device from the given option ?

Record players
Microprocessors
Sensors
Thermistors

Q.18.

Convert the following decimal number to 8-bit binary.

101110112
110111012
101111012
101111002

Q.19.

In the boolean algebra, a variable has ________ different state(s)/value(s).

3
1
2
4

Q.20.

An AND gate will function as OR if

All the inputs to the gates are “1”
All the inputs are ‘0’
Either of the inputs is “1”
All the inputs and outputs are complemente'

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