Year 8 Quiz 1

What is the Decimal representation for the binary number 00111100

• 60

• 61

• 62

• 63

A variable is a location in code that ​ (a)   ​.

• stores a value
• makes a decision
• repeats a block of code

Put the steps into the correct order when converting a Binary number into a Hexadecimal number

• Swap the base 10 number for a letter if the value is 10 or greater

• Put each nibble into the conversion table

• Convert each nibble into base 10

• Split the byte in half

• Put both values side by side

What is an algorithm?

• An algorithm is a type of programming language.
• An algorithm is step-by-step instructions for solving a problem.

• An algorithm is a type of computer virus.
• An algorithm is a type of hardware component.

Match the following authentication techniques

Groups:

(a) Biometric

,

(b) Logical

,

(c) Physical

• Face ID

• Pin Number

• Password

• Passport

• Fingerprint

• Image search

• Retinal Scan

• Signature

• Pattern

• Key Card

• Voice Recognition

Authentication is the act of ​ (a)   .

• proving you are who you say you are
• proving you are a human and not a bot
• checking the validity of data
• testing an input falls into set boundaries

What is a condition?

• A question that returns true or false

• The method of testing the values input match a set criteria

• Code that repeats for a specific number of times

• A mathematical equation

What would be output by the following code?

• Hello

• Goodbye

• Error

• Nothing

Answer explanation

The Selection statement checks the condition: number is larger than 5.

Number is set to 6, therefore it is larger than 5. This means the selection is TRUE and "Hello" is output.

Label the code

a

b

Condition

Input

Variable

Loop

Why is the sequence important when writing an algorithm?

• The sequence has no impact on the algorithm
• The sequence determines the order of operations and impacts the final result.
• The sequence can be random and still work
• The sequence is only important for visual appeal