Digital Logic and Design Flashcards
7 cards from real BEE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Digital Logic and Design flashcards as text
A shift register has 4 stages. How many clock pulses are needed to serially load a 4-bit word?
Answer: 4
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.
Which canonical form expresses a Boolean function as a sum of minterms?
Answer: Sum of Products (SOP) in standard form
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.
In a Moore state machine, the output depends on:
Answer: Current state only
In a Moore machine, outputs are a function of the current state only, making them synchronous with the clock and independent of current inputs.
What is the hexadecimal equivalent of the binary number 1011 1100?
Answer: BC
Splitting 10111100 into nibbles: 1011=B and 1100=C, giving hexadecimal BC.
Which multiplexer configuration can implement any 3-variable Boolean function without additional gates?
Answer: 8-to-1 MUX
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.
A T flip-flop has T=1 and Q=0 before the clock edge. What is Q after the active clock edge?
Answer: 1
When T=1, the T flip-flop toggles, so Q changes from 0 to 1 on the active clock edge.
Which number system uses the digits 0–7 and a base of 8?
Answer: Octal
The octal number system uses base 8 with digits 0 through 7, and each octal digit corresponds to exactly 3 binary bits.