11DigiTech - End of Unit 2.1.1 Test

Identify the type of storage from the features given.

1. Emily is creating a film for a school project using a digital video camera and will transfer the videos to a computer for editing. The computer 4GB of storage free.

Calculate the number of videos that could be stored on the computer if each video was 200MB in size. You must show your working.

Calculate how many bits there are in a file with a size of 10 megabytes.

You must show your working.

Match the device with the correct type.

Draw in the box below a diagram to represent the ADC (Analogue to Digital Converter) process for sound.

a) Complete the missing binary values in the grid above.

b) Identify how many possible colours can be represented in this image?

Calculate the file size of this image in KB. You must show your working.

Describe what is meant by "bitmap" image.

Describe what is meant by "colour depth" and its effect on an image quality. Use an example.

A large supermarket would like to improve the security of their data and have decided to use magnetic storage to backup all their data.

Explain TWO reasons why magnetic storage is the most suitable for backing up data.

St. Ignatius Catholic School are considering whether to move all of their data from the local server on site to a cloud-based service provider.

Discuss the issues the school should consider before making a decision.