ACARA Digital Technologies Years 9–10 Word Scramble: Modular and Object-Oriented Programming (JavaScript) (Modules 728–742)
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Word scramble
Unscramble the letters and write each key term on the line.
1
OIMDFY DEOC
Read the code and predict its output, change one small part at a time, then re-run your tests after each change to check that nothing else broke.
2
OPO
Object-oriented programming: building a program from objects that bundle related data with the code that uses it, modelling real things and reusing a blueprint.
3
SLSCA ODG
A blueprint for dogs. An object like Rex is made from it. Properties are its data (nouns like name) and methods are its actions (verbs like bark).
4
ANDSTUE.GET = 61
Assigning to object.property with = changes an existing property or adds a new one if it is not there yet. Reading a property that does not exist gives undefined.
5
STME.AHNI
Inside a class, this means the object being worked on, so ______ is that object's own name property. Leaving out this causes a ReferenceError.
6
YJBPCE.RTOORTEP
Reads a property of an object, like rex.age. To change it, assign a new value: rex.age = 4. Each object keeps its own values.
7
ANHC.AIEBSLT += NMTAOU
A method line that updates the object's own property, so its state changes each time the method is called. Calling deposit(50) twice adds 50 twice.
Answer Key
ACARA Digital Technologies Years 9–10 · Modules 728–742
1OIMDFY DEOC → modify code — Read the code and predict its output, change one small part at a time, then re-run your tests after each change to check that nothing else broke.
2OPO → OOP — Object-oriented programming: building a program from objects that bundle related data with the code that uses it, modelling real things and reusing a blueprint.
3SLSCA ODG → class Dog — A blueprint for dogs. An object like Rex is made from it. Properties are its data (nouns like name) and methods are its actions (verbs like bark).
4ANDSTUE.GET = 61 → student.age = 16 — Assigning to object.property with = changes an existing property or adds a new one if it is not there yet. Reading a property that does not exist gives undefined.
5STME.AHNI → this.name — Inside a class, this means the object being worked on, so this.name is that object's own name property. Leaving out this causes a ReferenceError.
6YJBPCE.RTOORTEP → object.property — Reads a property of an object, like rex.age. To change it, assign a new value: rex.age = 4. Each object keeps its own values.
7ANHC.AIEBSLT += NMTAOU → this.balance += amount — A method line that updates the object's own property, so its state changes each time the method is called. Calling deposit(50) twice adds 50 twice.