Strings

Question 1

Define a string called ‘statement’ with the text of - She said “How’s the family?”

Answer 1

var statement = “She said "How’s the family?"”;

Question 2

Set the ‘escapedNewLine’ variable to the string of a new line character.

Answer 2

var escapedNewLine = “\n”;

Question 3

Set the ‘escapedBackslash’ variable to the string of a backslash character.

Answer 3

var escapedBackslash = “\”;

Question 4

Set the ‘escapedTab’ variable to the string of a tab character.

Answer 4

var escapedTab = “\t”;

Question 5

What will the following console.log statement output?

var first_name = "Jim";
var last_name = "Hoskins";

console.log(first_name + last_name);

Answer 5

JimHoskins

Question 6

What will the following console.log statement output?

var myMultilineVar = “Line one\n” +
“Line two\n” +
“Line three”;

console.log(myMultilineVar);

Answer 6

on the first line “Line one”, the second “Line two”, and on the final line “Line three”

Question 7

What will the following console.log statement output?

var first_name = "Jim";
var last_name = "Hoskins";

console.log(first_name + “ “ + last_name);

Answer 7

Jim Hoskins

Question 8

Backslash purpose

Answer 8

escapes the character

Question 9

var quick = “The quick brown fox jumps over the lazy dog”;

Create a variable of ‘quickLength’, to assign the length of the string ‘quick’.

Answer 9

var quickLength = quick.length;

Question 10

var quick = “The quick brown fox jumps over the lazy dog”;

Create a variable of ‘indexOfBrown’, to find the index of the string of “brown” in the string ‘quick’.

Answer 10

var indexOfBrown = quick.indexOf(“brown”);

Question 11

var quick = “The quick brown fox jumps over the lazy dog”;

Create a variable of ‘tenthCharacter’, to get the tenth character of the string ‘quick’.

Answer 11

var tenthCharacter = quick.charAt(9);

Question 12

var quick = “The quick brown fox jumps over the lazy dog”;

Create a variable of ‘wordBrown’, to extract the substring of “brown” from the string ‘quick’.

Answer 12

var wordBrown = quick.substr(10, 5);

Question 13

var quick = “The quick brown fox jumps over the lazy dog”;

Create a variable of ‘quickUpper’, to the uppercased version of the string ‘quick’.

Answer 13

var quickUpper = quick.toUpperCase();

Question 14

var quick = “The quick brown fox jumps over the lazy dog”;

Create a variable of ‘quickLower’, to the lowercased version of the string ‘quick’.

Answer 14

var quickLower = quick.toLowerCase();

Question 15

== vs. ===

Answer 15

== ---> value
=== ---> type and value

Question 16

What will the following code evaluate to?

“a”.toLowerCase() === “A”.toLowerCase()

Answer 16

True

Question 17

What will the following code evaluate to?

“a” === “A”

Answer 17

False

Question 18

What will the following code evaluate to?

“A” < “a”

Answer 18

True

Question 19

What is the result of the following expression?

“Treehouse”.indexOf(‘h’);

Answer 19

4

Question 20

In JavaScript, what does a string represent?

Answer 20

an arbitrary sequence of characters of text

Question 21

What is the result of the following expression?

“Treehouse”.substr(3,4);

Answer 21

“ehou”

Question 22

What is the result of the following expression?

“Treehouse”.charAt(6);

Answer 22

“u”

Question 23

What character denotes the beginning of an escape character sequence?

Answer 23

\

Question 24

Why do we need to type \ in our string literals to represent the character \?

Answer 24

The \ represents the start of an escape sequence, so a literal \ must be represented as an escape sequence itself

Question 25

What will return the number of characters in the string, “Treehouse”?

Answer 25

“Treehouse”.length

Question 26

What operator is used to join two strings together in JavaScript?

Answer 26

+