Question

1.

var s = "A red boat";

var a = s.split(" ");

what is the value of a?

var b = [9, 3, 2, 1, 3, 7];

var c = b.slice(2, 5);

What is the value of c?

var d = c.concat(a);

alert(d.join("**"));

	[ 'A', 'red' , 'boat'] [ 2 , 1, 3] 2**1**3**A**red**boat
	[ 'A', 'red' , 'boat'] [ 1 , 3, 7] 8**A**red**boat
	[ 'A', 'red' , 'boat'] [ 3 , 2, 1] A**red**boat
	[ 'A', 'red' , 'boat'] [ 3 , 1, 2] A**red**boat

2.

var a = [9, 3, 2, 1, 3];

a[20] = 6;   

console.log(a.length);

a.length = 10;

console.log(a);

a.length = 3;

console.log(a);

What is the printed as output?

	20 [9, 3, 2, 1, 3, , , , , , , , , , , , , , , , ] [9, 3, 2, 1, 3, , , , , ] [9, 3, 2]
	21 [9, 3, 2, 1, 3] [9, 3, 2, 1, 3] [9, 3, 2]
	20 [9, 3, 2, 1, 3, , , , , , , , , , , , , , , , , 6] [9, 3, 2, 1, 3, , , , , ] [9, 3, 2, 1, 3]
	21 [9, 3, 2, 1, 3, , , , , , , , , , , , , , , , , 6] [9, 3, 2, 1, 3, , , , , ] [9, 3, 2]

3.

var a = [];

var b = [3, 5];

b.push(2);   

b.unshift(7);   

a.push(3, 10, 5);   

a.reverse();   

console.log(a.pop());

console.log(a.shift());

b.push(a[0], 1);

b.sort();

console.log(b);

	3 5 [1, 10 , 2]
	3 5 [1, 10 , 2 , 3, 5 , 7]
	5 3 [1, 10 , 2 , 3, 5 , 7]
	3 5 [3, 5 ,7,1,10,2]

4.

var a = [9, 4, 1, 7, 8];

var b = a.slice(2);

console.log(b);

var c = a.slice();

console.log(c);

	[9, 4, 1, 7, 8] [9, 4, 1, 7, 8]
	[1,7,8] [1,7,8]
	[1,7,8] [9,4,1,7,8]
	[1] [9, 4, 1, 7, 8]

5.

var days = ["p\u014d\u02bbakahi", "p\u014d\u02bbalua",

"p\u014d\u02bbakolu", "p\u014d\u02bbah\u0101",

"p\u014d\u02bbalima", "p\u014d\u02bbaono",

"l\u0101pule"];

console.log(days[0]);

console.log(days[3]);

console.log(days[6]);

	lapule po'akahi po'aha
	po'akahi undefined NaN
	po'akahi po'aha lapule
	po'akahi NaN NaN

6.

var protoCircle = {x: 0, y: 0, radius: 1, color: "black"};

var c1 = Object.create(protoCircle);

c1.x = 4;

c1.color = "green";

console.log(c1.x);

console.log(c1.y);

console.log(c1.color);

console.log(c1.radius);

	0 0 black 1
	0 0 green 1
	4 0 green 1
	4 0 black 1

7.

var s1 = "Hello";

"Hello".toUpperCase();

var s2= "World";

"World".toUpperCase();

var s3= s1+s2;

Question 7 options:

	HelloWORLD
	HELLOWORLD
	HelloWorld
	HELLOWorld

Answer 1

Question 1:
[ 'A', 'red' , 'boat']
[ 2 , 1, 3]
2**1**3**A**red**boat

Question 2:
21
[9, 3, 2, 1, 3, , , , , , , , , , , , , , , , , 6]
[9, 3, 2, 1, 3, , , , , ]
[9, 3, 2]

Question 3:
3
5
[1, 10 , 2 , 3, 5 , 7]

Question 4:
[1,7,8]
[9,4,1,7,8]

Question 5:
po'akahi
po'aha
lapule

Question 6:
4
0
green
1

Question 7:
HelloWorld

Note: Please comment below if you have any doubts. upuote the solution if it helped. Thanks!