OCR GCSE Computer Science Data Representation

What is the binary representation of the decimal number 10?

• 1010

• 1100

• 1001

• 1110

Which of the following is a lossy image compression technique?

• PNG

• JPEG

• BMP

• TIFF

What is the primary purpose of metadata in a digital file?

• To store the main content of the file

• To provide information about the file

• To compress the file

• To encrypt the file

Which of the following is a common sound file format?

• MP3

• GIF

• PDF

• DOCX

How many bits are there in a byte?

• 4

• 8

• 16

• 32

Which of the following is a characteristic of lossless compression?

• Data is permanently removed

• Original data can be perfectly reconstructed

• File size is always smaller than lossy compression

• It is only used for image files

What is the hexadecimal representation of the binary number 1010?

• A

• B

• C

• D

Which of the following is NOT a type of data?

• Text

• Image

• Sound

• Algorithm

How is resolution measured on a image file?

• Image colour depth

• Pixel height x pixel width

• Sample rate x sample depth

• Number of bits per pixel

If an image has 5 colours, what colour depth is needed to represent the image?

• 3 bits

• 5 bits

• 1 bit

• 8 bits