Unit 2 Data Revision Quiz

What are the two categories of items that computers use binary to represent?

• Data and program instructions

• Images and sound

• Text and graphics

• Numbers and letters

What is the maximum number of states that can be represented by a binary pattern of 4 bits?

• 4

• 8

• 12

• 16

Which of the following is not part of the process of converting an unsigned integer from denary to binary?

• Checking if value is less than or equal to denary number

• Writing out powers of 2

• Adding 1 to the binary pattern

• Subtracting value from denary number

Why do we use hexadecimal notation?

• To confuse computers

• To make data storage larger

• To communicate long binary numbers more easily

• To slow down data transmission

What is the concept of overflow in binary arithmetic?

• Extra bits are added to the binary pattern

• Extra bits are discarded from the binary pattern

• Extra bits are preserved in the binary pattern

• Extra bits are shifted in the binary pattern

What is the concept of ASCII?

• A method of binary arithmetic

• A type of digital sound file

• A character set and encoding standard

• A method of data compression

What is the size of a bitmap image expressed as?

• Width x Height in pixels

• Number of bits in the colour depth

• Number of colours used

• Resolution in ppi

What is the process of analogue to digital conversion in digital sound?

• Sampling and taking samples per second

• Recording with a microphone

• Using a sample interval

• Taking sound snapshots

What is the largest unit of storage from the list below?

• Kilobyte

• Bit

• Nibble

• Kibibyte

What is the benefit of lossless data compression?

• Makes minute changes to the file data

• Permanently deletes some of the original data

• Retains the original data and file quality

• Reduces file size