Computer Science Quiz

Tick (✓) one box to show which statement is a benefit of compressing the videos.

• Data is encrypted.

• Duration of each video will be reduced.

• Less storage space on the web server is required.

• More bandwidth is required when viewing the videos.

Give two methods of compression that could be used to compress the videos.

Identify the type of data transmission used in a USB connection.

Identify two reasons why errors can occur when using wireless technology to transmit data.

Tick (✓) one box to show which 8-bit binary value is the correct conversion for the denary value 50.

• 00101010

• 00110010

• 01001100

• 01010000

Tick (✓) one box to show which 8-bit binary value is the correct conversion for the hexadecimal value 90.

• 00001001

• 01011010

• 10010000

• 01100100

Explain why a computer system can only process data in binary form.

Add the two 8-bit binary values. Give your answer in binary. Show all your working.

State what is given to a device when it connects to a wireless network using the SSID and correct password.

Tick (✓) to show whether the MP3 file is a lossy compressed file or a lossless compressed file or not a compressed file.

• Lossy compressed file

• Lossless compressed file

• Not a compressed file