Year 7 C3 2023 Past Paper Section B

The size of a low-quality image downloaded from the Internet could be:

• 2 TB.

• 12 GB.

• 687 KB.

• 120 MB.

Which of these binary representations is bigger than the decimal number 14?

• 1110

• 1111

• 0101

• 1100

What is the name of the network map shown below?

• Techopedia

• Internet.

• ARPANET.

• WWW.

In Cryptography, in order to encrypt the plaintext HELP, it is first converted to a number, for example 52356. Once in numerical form, what must be used to modify the number?

• A password.

• A pin number.

• An e-mail address.

• A key.

What does Digital Footprint mean?

• An impression of our foot or shoe on a surface.

• The shape and size of an occupied area.

• The trail of digital information we leave behind us when we do anything online.

• The impact of an organization on the environment.

An SSD (solid state drive) is classified as a non-volatile storage device. What does non-volatile mean?

• Retains stored information even after power is removed.

• Reads and writes data very fast.

• Quite expensive to buy.

• SSD is smaller in physical size and quieter.

Identify the biometric technique shown in the picture below:

• Hand Scanner.

• Voice Recognition.

• Retina Scan.

• Face Scanner.

The diagram on the right represents a simple block diagram of a computer system. Select the name of the block marked with an X:

• Storage.

• Output.

• Input.

• Processing.

ARPANET administration were looking to hand off responsibility from maintaining the Internet. Who officially replaced ARPANET as the backbone of the INTERNET?

• NSFNET

• MICROSOFT

• GOOGLE

• FLYNET

In crypthography, a Caesar cipher is one of the simplest and most widely known encryption techniques. It is a type of substitution cipher in which each letter in the plaintext is replaced by a letter some fixed number of positions down the alphabet.

For example, with a left shift of 3, D would be replaced by A, E would become B, and so on. The method is named after Julius Caesar.

Decrypt the text below encrypted in Caesar Cipher.

The image shown above can help you a lot!

CXQB

• FAST

• HELP

• FATE

• PUSH