1.4.1 Data Types

Question 1

What data type should be used for storing a phone number like 07777777333?

Answer 1

String

• Numeric types would remove the leading 0

Question 2

Perform an AND mask on the Binary numbers

10101101
01011011

Answer 2

00001001

Question 3

Which data type stores a collection of characters?

Answer 3

String

Question 4

Add the two binary numbers and give answer in decimal

01011011
00111010

Answer 4

10010101

=

149

Question 5

What is the decimal 45 in binary?

Give your answer as a byte

Answer 5

00101101

Question 6

What is the hexadecimal 2E in decimal?

Answer 6

(2x16) + (14x1) = 46

Question 7

What is the hexadecimal 45 in binary?

Give your answer as a byte

Answer 7

01000101

Question 8

Which data type stores just True and False?

Answer 8

Boolean

Question 9

What is -5 in sign magnitude binary?

Give your answer as a nybble

Answer 9

1101

Question 10

What does the binary 01101100 represent in hex?

Answer 10

6C

Question 11

What is the effect of a logical shift left by one place?

Answer 11

The value is doubled (x2^1)

Question 12

What is the two’s complement binary 10101101 in decimal?

Answer 12

-83

Question 13

The binary 0011010000110 is a floating point number with a single-bit sign, 8 but mantissa and 4 bit exponent

What is the number in decimal?

Answer 13

52

Question 14

Perform a logical shift right by two places on the binary number 01101010 and convert your result to decimal

Answer 14

26.5

Question 15

Perform an XOR mask on the binary numbers:

01010101
10111011

Answer 15

11101110

Question 16

Which of the following is not a character?

A: 8
B: R
C: %
D: 43

Answer 16

D

Question 17

The binary 1100110000011 is a floating point number with a single-bit sign, 8-bit mantissa and 4 but exponent

What is the number in decimal?

Answer 17

-9.5