Digital Technology Recap 2

Which of the following is the smallest unit of data?

• Bit

• Byte

• Kilobyte

• Megabyte

Answer explanation

The smallest unit of data is a Bit, which represents a single binary digit (0 or 1). It is the building block for all other data units.

What is the correct order of data units from smallest to largest?

Answer explanation

The correct order of data units from smallest to largest is bit, byte, kilobyte, megabyte, gigabyte, terabyte.

Which of the following character representations uses 7-bit and 8-bit encoding?

• ASCII

• Unicode

• Binary

• Hexadecimal

Answer explanation

ASCII is the character representation that uses both 7-bit and 8-bit encoding, making it the correct choice in this context.

What does the term 'overflow' refer to in the context of digital data?

Answer explanation

Overflow in digital data refers to a situation where the data exceeds the capacity of the storage location, leading to errors or loss of information.

Which of the following is NOT a unit of data?

• Bit

• Nibble

• Byte

• Pixel

Answer explanation

The correct choice is Pixel because it is not a unit of data like Bit, Nibble, and Byte which are commonly used in computing to represent data size.

What does the term "bit" stand for in computing?

• Binary integer

• Binary digit

• Binary information

• Binary input

Answer explanation

In computing, the term 'bit' stands for 'Binary digit', representing the smallest unit of data in a computer system, with values of either 0 or 1.

How many bits are there in a byte?

• 4

• 8

• 16

• 32

Answer explanation

A byte consists of 8 bits. Therefore, the correct answer is 8 bits.

What is the value of 128 + 4 + 2 in binary?

• 10000010

• 10000110

• 10000100

• 10000001

Answer explanation

To find the binary value of 128 + 4 + 2, add the decimal values first (128 + 4 + 2 = 134), then convert 134 to binary which is 10000110. Therefore, the correct binary value is 10000110.

How many bytes are there in a kilobyte (KB)?

• 512

• 1024

• 2048

• 4096

Answer explanation

A kilobyte (KB) consists of 1024 bytes. Therefore, the correct answer is 1024.

Which of the following is the smallest unit of storage in a computer?

• Byte

• Nibble

• Bit

• Kilobyte

Answer explanation

The smallest unit of storage in a computer is a Bit, which represents a binary digit (0 or 1). It is the fundamental building block for all data storage and processing.