How can you check if a property exists in an object?
A). 'property' in object
B). object.hasProperty('property')
C). object.contains('property')
D). object.includes('property')
How do you define a constructor function for a Car object?
A). function Car(make, model, year) { this.make = make; this.model = model; this.year = year; }
B). Car(make, model, year) { this.make = make; this.model = model; this.year = year; }
C). function create Car(make, model, year) { this.make = make; this.model = model; this.year = year; }
D). function construct Car(make, model, year) { this.make = make; this.model = model; this.year = year; }
Which method can be used to call a function defined within an object?
A). object.functionName();
B). object->functionName();
C). object::functionName();
D). object.callFunction('functionName');
What will car['make'] return if var car = {make: 'Ford', model: 'Mustang'};?
A). Ford
B). Mustang
C). Undefined
D). Error
What will the following code output? console.log(car.make); if var car = {make: 'Honda', model: 'Civic'};
A). Honda
B). Civic
C). Undefined
D). Error
How do you define a class in JavaScript ES6?
A). class ClassName { constructor() {} }
B). function ClassName() { constructor() {} }
C). class ClassName() { constructor {} }
D). function class ClassName { constructor() {} }
What is the output of car.start() if var car = {start: function() {console.log('Car started');}};?
A). Car
B). started
C). Car started
D). Error
How do you define a method inside a class in JavaScript ES6?
A). methodName() {}
B). this.methodName = function() {}
C). function methodName() {}
D). methodName: function() {}
What does Object.assign(target, ...sources) do?
A). Copies properties from sources to target
B). Compares properties between target and sources
C). Deletes properties in sources
D). Merges properties of sources into target and removes duplicates
How do you define a method in a constructor function?
A). this.methodName = function() {}
B). this.methodName: function() {}
C). this.methodName = () {}
D). this.methodName: () {}