Pickles AcademyStart for freeA program for the robot – practice for Years 4–6
Sample questions on A program for the robot with the right answer and a worked solution, from easy to hard. In the Pickles Academy app a child gets new questions of the same kind every time, so they can't just learn the answers by heart.
- Subject
- Computing
- Year
- Years 4–6
- Curriculum area
- Algorithms and programming
Question types: Which program reaches the star?
Rule: A program for the robot
Trace each program step by step from the start. Rule out any that leaves the board or hits a wall.
The right program stops exactly on the star; just passing over it is not enough.
Example: The star is 2 squares right and 1 down: → → ↓ and ↓ → → both reach it if no wall is in the way.
Watch out: Order matters: ↓ → → may hit a wall even though → → ↓ gets through.
Sample questions
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Question 1 Easy
Which program takes the robot to the star? It must not leave the board or drive into a wall. Each arrow moves the robot one square that way.
Show the solution
Answer: C) ← ← ↑How it works: ← ← ↑ reaches the star. The other programs stop somewhere else or crash.
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Question 2 Normal
Which program takes the robot to the star? It must not leave the board or drive into a wall. Each arrow moves the robot one square that way.
Show the solution
Answer: A) ↓ ↓ → ↓ → ↑How it works: ↓ ↓ → ↓ → ↑ reaches the star. The other programs stop somewhere else or crash.
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Question 3 Hard
The robot faces the way its arrow points. Which program takes the robot to the star? It must not leave the board or drive into a wall. ⬆ = one step forward, ↺ = turn left, ↻ = turn right (on the spot).
Show the solution
Answer: B) ↺ ⬆ ↺ ⬆ ↻ ⬆How it works: ↺ ⬆ ↺ ⬆ ↻ ⬆ reaches the star. The other programs stop somewhere else or crash.
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