Year 7 Algorithms and BBC Micro:bits

Which of the following best describes what an algorithm is?

• A programming language used to code computers.
• A set of clear instructions to solve a problem or complete a task.
• A type of computer hardware.
• A button on the BBC micro:bit.

In an algorithm, what is a 'sequence'?

• Repeating a set of instructions multiple times.
• Following instructions one after another in a specific order.
• Storing information for later use.
• A decision point where the program chooses between different actions.

Which of the following BBC micro:bit blocks would be used to display the word "HELLO" on its LED screen?

• `show string "HELLO"`
• `on button A pressed`
• `show number 0`
• `forever`

What is 'selection' in an algorithm?

• Arranging instructions in a specific order.
• Giving a name to a piece of data.
• Making a choice between different sets of instructions based on a condition.
• Repeating a block of code until a condition is met.

Which BBC micro:bit block is an example of 'iteration'?

• `if temperature > 20 then`
• `on shake`
• `show icon Heart`
• `forever`

Imagine a BBC micro:bit program with the following blocks in order: `show number 1`, `show number 2`, `show number 3`. What will the micro:bit display?

• It will display all three numbers at the same time.
• It will display nothing.
• It will only display the number 3.
• It will display 1, then 2, then 3, one after the other.

What is the purpose of the `if...then...else` block in BBC micro:bit programming?

• To make a decision and execute different code based on whether a condition is true or false.
• To display text on the screen.
• To repeat a set of instructions.
• To store a value.

What will the BBC micro:bit display if the following blocks are used: `forever { show string "GO" }`?

• The letters "G" and "O" will appear on separate LEDs.
• The word "GO" will appear once.
• Nothing will be displayed.
• The word "GO" will flash repeatedly on the LED screen.

A student writes a BBC micro:bit program with the following blocks: `forever { show string "A" }`, `forever { show string "B" }`. What will likely happen on the micro:bit's display?

• It will only show "B".
• It will only show "A".
• It will alternate quickly between showing "A" and "B".
• It will show "AB" continuously.

A BBC micro:bit program is intended to display a heart when button A is pressed. However, when button A is pressed, it displays a square. What is the most likely type of error in the program?

• The wrong icon block was used.
• A problem with the power supply.
• A hardware malfunction.
• An error in the sequence of the `forever` loop.