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Opcode
Term Y11 Mechatronics
Definition
The part of a machine instruction that says which operation to perform; the rest of the instruction holds the operands.
Example: ADD R1, R2: ADD is the opcode.
Found in: syllabus, past SDD papers.
Where it is used in the test
Syllabus area: Y11 Mechatronics.
Question types it can appear in
- Multiple choice: Pick the option that matches the definition or example.
- Fill in the blanks: Choose this term to complete a statement or table.
- Short answer: Define, outline or explain it and tie it to the scenario.
No past question in this bank is linked to this term yet. It can still be tested through the question types above.
Study links
- Flashcard: Opcode in Programming Mechatronics (Year 11) · study that set
- Memorise: Mechatronics: hardware, sensors, actuators, control
How to use it in an answer
A model sentence
“The part of a machine instruction that says which operation to perform; the rest of the instruction holds the operands.” Then apply it: ADD R1, R2: ADD is the opcode.
In a short answer, give the definition in your own words first, then tie it to the situation in the question. Do not copy the example above unless it fits the scenario.
Command words used with it
No linked question shows the command word for this term. Across the past short answer questions in this bank the words used most are: Explain, Outline, Describe, Compare, Classify, Analyse. Check the actual word in your question.
Technique for the question types
- Multiple choice: Read all four options, rule out wrong ones, pick one; no penalty for guessing so never leave blank.
- Fill in the blanks: Choose the right word from a list; use exact syllabus terms.
- Short answer: One clear point per mark, use the stimulus and course terms, and answer the command word.
Common mistakes
- Use the term exactly as the syllabus words it, then link it to the scenario in the question; the 2025 feedback repeatedly rewards using the stimulus.
- Answer the command word: outline gives main points only, explain gives a reason or cause, discuss gives both sides.
Related terms
Same group in the syllabus: Mechatronic system · Microcontroller · CPU (central processing unit) · Instruction set · Address register · Data register · Sensor · Motion sensor · Light level sensor · Actuator · Hydraulic actuator · End effector (manipulator) · Robotic gripper