Trace, test and repair algorithms
Practise online with Next and Previous buttons, worked explanations and a report of the questions to review.
Log in to continueFollow instructions exactly, select useful tests and correct the cause of an error.
One-question preview
Choose one answer
Try this sample, or continue to the online quiz for a practice set with Next and Previous buttons.
An algorithm starts with total = 1. It repeats “add 2 to total” exactly 3 times. What is the final total?
Show worked steps
Answer: 7
- There are 3 additions of 2, giving 6.
- Add the start value: 1 + 6 = 7.
- 2 × 3 = 6.
- 1 + 6 = 7.
This is a question from this topic’s quiz. Preview answers are not saved.
Scratchpad
Working out
Draw with a finger, pen or mouse, or type your working below.
Your working stays on this page. It is not submitted or saved, and clears when you leave or reload.
Curriculum reference
Victorian Curriculum F–10 Version 2.0
Pi Leo practice scope
Follow instructions exactly, select useful tests and correct the cause of an error.
Read the official VCAA curriculum description (VC2M8A04)
These quizzes practise concepts within this topic. Multiple-choice answers alone do not demonstrate drawing, conducting an investigation or using a digital tool.
Activities to practise beyond the quiz
- Supported by the guided activity; selecting an MCQ does not demonstrate this action.
- VC2M8A04-C01Trace repeated arithmetic instructions.
- VC2M8A04-C02Identify errors using expected outputs and boundary tests.
- VC2M8A04-C03Implement, test and correct an algorithm and explain the repair.
- VC2M8A04-C04Apply and explain trace, test and repair algorithms using calculate and explain each step.
- VC2M8A04-C05Apply and explain trace, test and repair algorithms using read and connect representations.
Learn with worked examples
Help with this topic
Skills in this topic
Traceable coverage
Subskills
These practice subskills map to the curriculum topic. Guided activities cover skills beyond multiple-choice questions.
Descriptor-derived subskills
- D01Follow one instruction at a timeTrace repeated arithmetic instructions.
- D02Find the cause, then retestIdentify errors using expected outputs and boundary tests.
- D03Calculate and explain each stepApply and explain trace, test and repair algorithms using calculate and explain each step.
- D04Read and connect representationsApply and explain trace, test and repair algorithms using read and connect representations.