Number Systems & Digital MCQs with Answers

Past Paper MCQ

How many bits are contained within a single byte?

• A.4
• B.8
• C.16
• D.32

Which number system uses base 16 and digits from 0 to 15?

• A.Octal
• B.Binary
• C.Hexadecimal
• D.Decimal

In a JK flip-flop, what is the result when both J and K inputs are high during a clock pulse?

• A.The output sets to 1
• B.The output resets to 0
• C.The output toggles
• D.The output remains unchanged

How are digital signals commonly represented in computer systems?

• A.Decimal numbers
• B.Analog waves
• C.Hexadecimal values
• D.Binary code

How many digits are used in the hexadecimal number system?

• A.8
• B.10
• C.16
• D.2

What language is primarily used by computers to process instructions?

• A.Machine language
• B.Assembly language
• C.High-level language
• D.Binary language

Which type of electrical signals do digital computers use for their operation?

• A.Continuous electrical signals
• B.Discrete electrical signals
• C.Analog electrical signals
• D.Sinusoidal electrical signals

How many distinct values can a Boolean variable hold?

• A.One
• B.Three
• C.Two
• D.Infinite

In Karnaugh Maps, which method is used for simplification?

• A.1's are grouped horizontally and vertically
• B.0's are grouped diagonally
• C.Both 1's and 0's are grouped randomly
• D.Only adjacent 0's are grouped

What is a program that represents eight symbols called?

• A.Decimal
• B.Binary
• C.Hexadecimal
• D.Octal