Data Types

Question 1

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

Answer 1

String

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:
01011011
00111010

Answer 4

10010101 = 49

Question 5

What is 45 in binary?

Answer 5

00101101

Question 6

What is the hexadecimal 2E in decimal?

Answer 6

46

Question 7

What is the hexadecimal 45 in binary?

Answer 7

01000101

Question 8

Which data type just stores true and false?

Answer 8

Boolean

Question 9

What is -5 in sign and magnitude?

Answer 9

1101

Question 10

What does the binary 01101100 represent in hexadecimal?

Answer 10

6C

Question 11

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

Answer 11

The value doubles

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-bit 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 a XOR mask on the binary numbers:
01010101
10111011

Answer 15

11101110

Question 16

Which of the following is not a character?
- 8
- R
- %
- 43

Answer 16

43

Question 17

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 17

-9.5