Fundementals Of Computer Systems

Question 1

Where are adders usually found?

Answer 1

In the ALU of the CPU

Question 2

What is a half adder?

Answer 2

A circuit that performs addition using inputs from A and B only

Question 3

What is a full adder?

Answer 3

A circuit that performs addition using inputs from A and B plus a carry bit

Question 4

How can you construct a full adder?

Answer 4

By chaining together half adders

Question 5

How many inputs can a full adder take?

Answer 5

3 (2 binary;1 carry bit)

Question 6

What logic gate is used to represent a half adder and why

Answer 6

XOR because it identifies when the input is different

Question 7

What is a flip-flop?

Answer 7

A memory unit that can store 1 bit

Question 8

What is an edge triggered D type flip flop?

Answer 8

A memory unit that changes state with each pulse of the clock

Question 9

Why do we need a flip flop?

Answer 9

To store the results from the previous output calculation

Question 10

How many inputs is a logic circuit receiving if we are now using a flip flop?

Answer 10

2

Question 11

For a D type flip flop, how would the flip flop change state?

Answer 11

When the pulse of the clock changes.