ALU 101 Digital Logic Gates 3

Question 1

Which gate produces 0 only when all inputs are 1?

Accepted Answer

NAND

Answer

A NAND gate outputs 0 only when every input is 1, producing 1 for all other input combinations.

Question 2

A NOR gate with inputs A=0 and B=0 outputs:

Accepted Answer

1

Answer

Since both inputs of the NOR gate are 0, the OR function gives 0, and its complement (NOR) gives 1.

Question 3

Which Boolean operation does the AND gate implement?

Accepted Answer

Logical multiplication

Answer

The AND gate implements logical multiplication (·), outputting 1 only when all inputs are 1.

Question 4

How many gates are required to build a full adder using basic logic gates?

Accepted Answer

5

Answer

A full adder can be built using 5 basic logic gates: 2 XOR, 2 AND, and 1 OR gate.

Question 5

What logic gate is formed by combining an AND gate followed by a NOT gate?

Accepted Answer

NAND

Answer

A NAND gate is equivalent to an AND gate whose output is inverted by a NOT gate.

ALU 101 - Arithmetic Logic Unit 101 Exam Practice Test