G7 Computing Assessment - Data

How many different characters are represented in ASCII character set?

• 128

• 256

• 512

• several billions

Which of the following character sets allow encoding of characters used in English and European languages only?

• ASCII

• Extended ASCII

• Unicode

• None of the above

What is the function of compression?

• Reducing the file size

• Converting analogue signals to digital files

• Increasing the file quality

• None of the above

Which of the following file formats are used to store animated graphics?

• PNG

• JPEG

• GIF

Binary equivalent of 7 is 0111. What is the denary equivalent of 1110?

• 8

• 14

• 9

• 16

What is the denary equivalent for the binary number 11001?

• 22

• 23

• 24

• 25

Complete this sentence: Hexadecimal system is a base ____________ system.

• 2

• 8

• 10

• 16

Ciphertext is the original message to be encrypted.

• True

• False

Why is Caesar cypher not used for highly confidential information?

• It is easy to crack Caesar cypher.

• It is time consuming

• It increases the amount of data

• It corrupts the data

A computer stores instructions and values in binary form

• True

• False