BEE Digital Logic and Design 4

Question 1

A shift register has 4 stages. How many clock pulses are needed to serially load a 4-bit word?

Accepted Answer

4

Answer

A serial-in shift register requires one clock pulse per bit, so 4 clock pulses are needed to load all 4 bits of a 4-bit word.

Question 2

Which canonical form expresses a Boolean function as a sum of minterms?

Accepted Answer

Sum of Products (SOP) in standard form

Answer

The Sum of Minterms (canonical SOP) form expresses a Boolean function as an OR of minterms, each minterm being an AND of all variables in complemented or uncomplemented form.

Question 3

In a Moore state machine, the output depends on:

Accepted Answer

Current state only

Answer

In a Moore machine, outputs are a function of the current state only, making them synchronous with the clock and independent of current inputs.

Question 4

What is the hexadecimal equivalent of the binary number 1011 1100?

Accepted Answer

BC

Answer

Splitting 10111100 into nibbles: 1011=B and 1100=C, giving hexadecimal BC.

Question 5

Which multiplexer configuration can implement any 3-variable Boolean function without additional gates?

Accepted Answer

8-to-1 MUX

Answer

An 8-to-1 MUX with 3 select lines can directly implement any 3-variable Boolean function by connecting constants (0 or 1) to its data inputs.

BEE - Bachelor of Electrical Engineering Practice Test

BEE - Bachelor of Electrical Engineering Practice Test

BEE Digital Logic and Design 4