Year9 Unit1 Quiz

What is abstraction in computing?

• Hiding unnecessary details

• Writing pseudocode

• Creating real-world models

• Debugging programs

Which of the following best represents abstraction?

• Writing full code

• Ignoring irrelevant details to focus on what's important

• Printing results

• Running tests

Abstraction is useful because it:

• Makes programs longer

• Hides all the errors

• Helps reduce complexity

• Increases hardware requirements

Which is NOT a part of computational thinking?

• Decomposition

• Abstraction

• Repetition

• Algorithm design

Decomposition in computational thinking means:

• Breaking down problems into smaller parts

• Running a program

• Sorting data

• Searching data

Why is computational thinking important?

• It replaces coding

• It helps solve problems efficiently

• It slows down processes

• It is only used in games

What is an algorithm?

• A type of bug

• A step-by-step set of instructions

• A programming language

• A search engine

Which of these is an example of an algorithm?

• Google

• If-else statement

• Instructions to make a cup of tea

• A spreadsheet

Which statement is true about algorithms?

• They are always written in Python

• They must be written in code

• They can be represented using pseudocode or flowcharts

• They cannot be changed

Bubble Sort works by:

• Searching for a value

• Swapping adjacent elements if they are in the wrong order

• Using a tree structure

• Finding the middle element