GCSE Computer Science J276/01 Computer Systems

1 (a) (i) William is creating a film for a school project using a digital video camera. The digital video camera has a secondary storage device. Explain why the digital video camera needs secondary storage. [2] (ii) The digital video camera uses solid state storage. Explain why solid state storage is the most appropriate type of storage for the digitalvideo camera. [4] (b) (i) William transfers the videos to a computer for editing. The computer has 1GB of storage free. Calculate the number of videos that could be stored on the computer if each video was100MB in size. Show your working. [2] (ii) A program needs to calculate the size of files in bytes. The program must: ○ Ask the user to input a file size in megabytes ○ calculate and output the number of bytes this represents in a user friendly format(e.g. "There are bytes in 5MB"). Write an algorithm using pseudocode to calculate the number of bytes in a given numberof megabytes. [6] (c) (i) William’s computer has utility programs installed including automatic backup. William can choose between a full or incremental backup. Identify the backup method William should use to backup the computer, justi