BEE BEE Bachelor of Electrical Engineering Digital Logic and Systems Questions and Answers 2

Question 1

What is the output of an XOR gate when both inputs are 1?

Accepted Answer

0

Answer

An XOR gate outputs 0 when both inputs are the same value.

Question 2

Which flip-flop is used to divide the input clock frequency by 2?

Accepted Answer

T flip-flop with T=1

Answer

A T flip-flop with T tied to 1 toggles on every clock edge, producing an output at half the clock frequency.

Question 3

How many select lines are needed for an 8-to-1 multiplexer?

Accepted Answer

3

Answer

An 8-to-1 multiplexer requires 3 select lines because 2^3 = 8 input combinations.

Question 4

What does a Karnaugh map primarily help minimize?

Accepted Answer

Boolean expressions

Answer

A Karnaugh map is a graphical method used to simplify Boolean algebra expressions and reduce the number of logic gates needed.

Question 5

In a 4-bit synchronous counter, what is the maximum count value in decimal?

Accepted Answer

15

Answer

A 4-bit counter counts from 0 to 2^4 - 1 = 15, giving a maximum decimal value of 15.

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