Paper 1 Review

(a) Give the name of the data storage measurement that is equal to 8 bits.

(b) State how many bits there are in a kibibyte (KiB).

(c) Give the name of the data storage measurement that is equal to 1024 gibibytes (GiB).

(d) A 16-bit colour image has a resolution of 512 pixels wide by 512 pixels high. Calculate the file size of the image in kibibytes (KiB). Show all your working.

(a) Tick (✓) one box to show which of the terms is not a method for transmitting data.

• A serial

• B simplex

• C parallel

• D parity

(b) Data is broken down into smaller units to be transmitted from one device to another. Give the name of the unit that data is broken down into.

(i) Explain how data is encrypted using symmetric encryption.

(ii) Give the purpose of encryption.

(a) Three denary numbers are entered into a computer. The computer converts the numbers and stores them as binary. (i) Give the binary number that would be stored for each of the denary numbers. 10 ...................................................................................................................................... 50

(a) Three denary numbers are entered into a computer. The computer converts the numbers and stores them as binary. (i) Give the binary number that would be stored for each of the denary numbers. ......................................................................................................................................201