Digital Logic Quiz lesson 2

What is a combinational circuit?

• A circuit that stores information

• A circuit where outputs depend on present inputs only

• A circuit that uses memory

• A circuit that processes sequential data

What is true about combinational circuits?

• They use memory elements

• Their output depends on both current and previous inputs

• They don’t use memory

• They require a clock signal

What is the function of a half adder?

• To add two single-bit binary numbers

• To subtract two binary numbers

• To store binary data

• To multiply binary numbers

What is a key difference between a half adder and a full adder?

• Half adder adds single bits; full adder adds multiple bits

• Full adder includes a carry-in input

• Half adder has memory; full adder does not

• Half adder uses sequential logic; full adder uses combinational logic

What does a multiplexer do?

• Selects one of many inputs and routes it to a single output

• Distributes one input to many outputs

• Converts binary data to decimal

• Adds binary numbers

How does a demultiplexer function?

• Selects one of several outputs and routes the input to it

• Combines multiple inputs into a single output

• Converts binary to BCD

• Adds two binary numbers

What is a decoder used for?

• To convert binary data into a different form

• To store digital data

• To perform arithmetic operations

• To control flip-flops

What is an encoder’s primary function?

• Converts an n-bit input into an m-bit binary code

• Adds binary numbers

• Routes a signal to different outputs

• Stores digital values

What is an example of a priority encoder?

• BCD to seven-segment decoder

• S-R Flip-Flop

• Decimal to BCD encoder

• Multiplexer

What differentiates a sequential circuit from a combinational circuit?

• Sequential circuits depend on present inputs only

• Sequential circuits store information and use previous outputs

• Sequential circuits do not require a clock signal

• Sequential circuits can only handle binary data