diagnostic test G10 2025

What is the denary equivalent of the 8-bit binary number 11010110?

• 214

• 210

• 218

• 206

What is the 8-bit binary representation of the denary number 149?

• 10010110

• 10010101

• 10010100

• 10010101

What is the hexadecimal equivalent of the denary number 255?

• FF

• EF

• FE

• E0

Convert the hexadecimal number 5C to denary.

• 92

• 94

• 84

• 82

What is the binary number 01111011 in hexadecimal?

• 7A

• 7B

• 7C

• 7E

An image has a resolution of 1920 x 1080 pixels and a colour depth of 24 bits. What is the file size in MBytes (megabytes)?

• 6.22 MBytes

• 5.93 MBytes

• 4.95 MBytes

• 5.24 MBytes

A sound sample is recorded with a sample rate of 44.1 kHz, a bit depth of 16 bits, and is 3 minutes long. What is the file size in KBytes?

• 15,876 KBytes

• 15.50 KBytes

• 1,058, KBytes

• 44.1 KBytes

What is the primary purpose of data compression?

• To increase the quality of the data.

• To reduce the file size.

• To make the data easier to read.

• To add security to the data.

Which type of compression permanently removes some data to reduce the file size?

• Lossless

• Lossy

• Run-length encoding

• Encryption

Which character encoding standard uses 16 bits per character?

• ASCII

• EBCDIC

• Unicode

• BCD