May/June 2026 Paper 12

A video streaming service uses hexadecimal to display error codes when problems occur with their videos. Tick one box to show which statement is incorrect about why hexadecimal is used to display the error codes.

There is a problem with streaming a video and the error codes 152 and 30F are displayed. Convert the two hexadecimal error codes to binary numbers.

The binary numbers 010001110101 and 101011101000 are stored. Convert the two binary numbers to the hexadecimal error codes that would be displayed.

Hexadecimal numbers can also be converted to denary numbers. Convert the two hexadecimal error codes 0A2 and 104 to denary numbers.

The videos are stored on a web server. The data for the videos is sent from the web server to a user’s computer using packet switching. Each packet of data is divided into three parts. One part is the payload. Give the names of the two other parts of a packet of data.

Explain the role of a router in packet switching.

The web server uses magnetic storage. One feature of magnetic storage is that it has moving parts. Give two other features of magnetic storage.

The video streaming service wants faster read and write speeds for their videos than is provided by magnetic storage. State which type of storage they should use.

The video streaming service compresses their videos using lossless compression. Give two reasons why the video streaming service chose lossless compression instead of lossy compression.

Give one advantage to the video streaming service of choosing lossy compression instead of lossless compression to compress the videos.

Explain how the videos are compressed using lossless compression.