1.4.1 Data Types

Question 1

What data type should be used for storing a phone number like 07886756443?

Answer 1

String (an integer would remove the leading 0)

Question 2

What data type stores a collection of characters?

Answer 2

String

Question 3

Add the two binary numbers
01011011
00111010

Answer 3

10010101 - 149

Question 4

What is the decimal 45 in binary?
Give your answer as a byte

Answer 4

00101101

Question 5

What is the hexadecimal 2E in decimal?

Answer 5

(2x16) + (14x1) = 46

Question 6

What is the hexadecimal 45 in binary?

Answer 6

01000101

Question 7

Which data type stores just True or False?

Answer 7

Boolean

Question 8

What is -5 in sign and magnitude binary?

Answer 8

1101

Question 9

What does the binary 01101100 in hexadecimal?

Answer 9

6C

Question 10

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

Answer 10

-83

Question 11

The binary 0011010000110 is a floating point number with a single-bit sign, 8-bit mantissa and 4-bit exponent. What is the number in decimal?

Answer 11

52

Question 12

Which of the following is not a character?
A: 8 C:%
B: R D:43

Answer 12

D

Question 13

The binary 1100110000011 is a floating point number with a single-bit sign, 8-bit mantissa and 4-bit exponent.
What is the number in decimal?

Answer 13

-9.5