Revised: Computing Architecture Revision

Select the correct bases for the following number systems: binary, denary, and hexadecimal.

• Binary: 2, Denary: 10, Hexadecimal: 16

• Binary: 8, Denary: 2, Hexadecimal: 10

• Binary: 10, Denary: 16, Hexadecimal: 2

• Binary: 16, Denary: 8, Hexadecimal: 10

Which single characters are used to write the numbers 10 to 15 in hexadecimal?

• A, B, C, D, E, F

• G, H, I, J, K, L

• 1, 2, 3, 4, 5, 6

• X, Y, Z, W, Q, R

Fill in the missing powers of two from the list: 1, 2, 4, ___, 16, 32, ___, 128, ___, 512

• 8, 64, 256

• 10, 60, 250

• 6, 66, 200

• 12, 62, 216

When counting in binary, what comes after the number 111?

• 1010

• 1000

• 1100

• 1111

Hexadecimal is used, rather than binary, when referring to, e.g. colour codes, because:

• Hexadecimal is shorter and easier to read than binary.

• Hexadecimal is more difficult to understand than binary.

• Hexadecimal is less accurate than binary.

• Hexadecimal is slower to process than binary.

The hexadecimal system is used in computing for which of the following purposes?

• Memory addressing, color codes in web design, and simplifying binary representation

• Storing audio files, video streaming, and wireless communication

• Creating spreadsheets, word processing, and database management

• Developing operating systems, compiling code, and running applications

Convert the binary number 1010 to denary.

• 10

• 8

• 12

• 5

Convert the denary number 15 to binary.

• 1111

• 1010

• 1100

• 1001

Convert the hexadecimal number A to binary.

• 1010

• 1100

• 1001

• 1111

Convert the binary number 1101 to hexadecimal.

• D

• B

• E

• A