ALU 101 Data Representation and Number Systems

Question 1

How is the decimal number 25 represented in 8-bit binary?

Accepted Answer

00011001

Answer

00010011

Answer

00110001

Answer

00011100

Question 2

In two's complement representation, what is the value of the 8-bit pattern 11110000?

Accepted Answer

-16

Answer

-15

Answer

240

Answer

-14

Question 3

What is the hexadecimal equivalent of the binary number 10110101?

Accepted Answer

B5

Answer

B4

Answer

A5

Answer

C5

Question 4

Which number representation allows the ALU to perform subtraction using only adder hardware?

Accepted Answer

Two's complement

Answer

Sign-magnitude

Answer

One's complement

Answer

Excess-127

Question 5

In BCD (Binary Coded Decimal), how is the decimal digit 7 encoded?

Accepted Answer

0111

Answer

0110

Answer

1000

Answer

1111

Question 6

What is the range of unsigned integers that can be stored in a 16-bit register?

Accepted Answer

0 to 65,535

Answer

0 to 32,767

Answer

-32,768 to 32,767

Answer

0 to 131,071