DIGITAL COMPUTER ELECTRONICS QUIZ

The EXCLUSIVE - NOR gate is equivalent to an _____ gate followed by an invertor.

OR

None of these

XOR

AND

NAND

TRUE ANSWER : ?
YOUR ANSWER : ?

A demultiplexer is also known as

encoder

data distributor

multiplexer

None of these

data selector

TRUE ANSWER : ?
YOUR ANSWER : ?

How many bits are required to encode all twenty six letters ten symbols, and ten numerals?

3

5

6

None of these

2

TRUE ANSWER : ?
YOUR ANSWER : ?

The octal equivalent of decimal 324.987 is

504.771

None of these

640.781

90.987

815.234

TRUE ANSWER : ?
YOUR ANSWER : ?

Parallel adders are

both of the above

sequential logic circuits

None of these

All of these

combinational logic circuits

TRUE ANSWER : ?
YOUR ANSWER : ?

A NOR gate recognizes only the input word whose bits are _____

None of these

0's or 1's

0's

1's

0's and 1's

TRUE ANSWER : ?
YOUR ANSWER : ?

An inventor is a gate with only _____ input; the output is always in the opposite state from the input

more than one

None of these

one

two

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following logic expression is wrong?

1 + 1=0

None of these

1+0+1 = 1

1 + 0=1

1 + 1 + 1 = 1

TRUE ANSWER : ?
YOUR ANSWER : ?

Binary-Coded-decimal (BCD) numbers express each digit as a _____

All of these

bit

nibble

byte

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Conversion of binary number 1011102 to an octal number is

358

468

508

None of these

568

TRUE ANSWER : ?
YOUR ANSWER : ?

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