1246602
Description
Quiz by Pulkit Singhal, updated more than 1 year ago
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Created by Pulkit Singhal
over 10 years ago
|
|
Question 1
Question
function Cat(name, color) {
this.name = name;
this.color = color;
}
Cat.prototype.age = 3;
var fluffy = new Cat("Fluffy", "White");
var scratchy = new Cat("Scratchy", "Black");
What is the value for fluffy.age and scratch.age?
Answer
-
3
-
null
-
undefined
-
0
Question 2
Question
Given that a function’s prototype is just an object, then what would happen if we started changing the properties of a function’s prototype after we created objects from it?
function Cat(name, color) {
this.name = name;
this.color = color;
}
Cat.prototype.age = 3;
var fluffy = new Cat("Fluffy", "White");
var scratchy = new Cat("Scratchy", "Black");
Cat.prototype.age = 4;
What is the value for fluffy.age and scratchy.age?
Answer
-
4
-
3
-
null
-
undefined
-
0
Question 3
Question
function Cat(name, color) {
this.name = name;
this.color = color;
}
Cat.prototype.age = 3;
var fluffy = new Cat("Fluffy", "White");
var scratchy = new Cat("Scratchy", "Black");
Cat.prototype = {age: 4};
What is fluffy.age and scratchy.age?
Answer
-
4
-
3
-
null
-
undefined
-
0
Question 4
Question
function Cat(name, color) {
this.name = name;
this.color = color;
}
Cat.prototype.age = 3;
var fluffy = new Cat("Fluffy", "White");
var scratchy = new Cat("Scratchy", "Black");
Cat.prototype = {age: 4};
var muffin = new Cat("Muffin", "Brown");
What is muffin.age?
Answer
-
4
-
3
-
null
-
undefined
-
0
Question 5
Question
function Cat(name, color) {
this.name = name;
this.color = color;
}
Cat.prototype.age = 3;
var fluffy = new Cat("Fluffy", "White");
var scratchy = new Cat("Scratchy", "Black");
fluffy.age = 4;
What is fluffy.age and scratchy.age?
Answer
-
fluffy.age; 4 scratchy.age; 3
-
fluffy.age; 4 scratchy.age; 4
-
fluffy.age; 3 scratchy.age; 3
Question 6
Question
function Cat(name, color) {
this.name = name;
this.color = color;
}
Cat.prototype.age = 3;
var fluffy = new Cat("Fluffy", "White");
var scratchy = new Cat("Scratchy", "Black");
fluffy.__proto__.age = 4;
What is fluffy.age and scratchy.age?
Answer
-
fluffy.age; 4 scratchy.age; 3
-
fluffy.age; 3 scratchy.age; 3
-
fluffy.age; 4 scratchy.age; 4
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