Computer Logic 2

1. What is the smallest binary number that can be represented in an 8-bit register?

0000 0000

1111 1111

255

2. What is an overflow error?

An error that occurs when a logic circuit can only output a 1

An error that occurs when a value is too large to fit in the available register

A programming error

3. An inverter gate

NOT gate

OR gate

AND gate

4. A logic gate that gives an output of TRUE only if both inputs are true

NOT gate

OR gate

AND gate

5. What is the largest unsigned binary number that can be represented in an 8-bit register?

0000 0000

1111 1111

255

6. The one's complement of 01101110 is

11101110

01101111

10010001

One's complement is found by inverting all digits

Explanation

One's complement is found by inverting all digits

7. Add the following binar numbers: 1010 + 0010

1000

1110

1100

8. Computer registers hold binary numbers. Binary numbers can represent

Numbers and characters

Numbers only

Characters only

9. Give the two's complement of 010011001

10110111

10110110

1

To convert unsigned binary to two's complement:
1. Invert all digits
2. Add 1

Explanation

To convert unsigned binary to two's complement:
1. Invert all digits
2. Add 1

10. What is the smallest two's complement that can be stored in an 8-bit register? (Give the decimal equivalent of this number)

-128

0

-127