diff --git a/curriculum/challenges/english/25-front-end-development/quiz-javascript-strings/66edc31c44f1b9c1d5c5ebca.md b/curriculum/challenges/english/25-front-end-development/quiz-javascript-strings/66edc31c44f1b9c1d5c5ebca.md index 3802ebfff65041..f678caf28ff44a 100644 --- a/curriculum/challenges/english/25-front-end-development/quiz-javascript-strings/66edc31c44f1b9c1d5c5ebca.md +++ b/curriculum/challenges/english/25-front-end-development/quiz-javascript-strings/66edc31c44f1b9c1d5c5ebca.md @@ -17,23 +17,23 @@ To pass the quiz, you must correctly answer at least 17 of the 20 questions belo #### --text-- -How can you access the second character of the string `JavaScript` using bracket notation? +What is the return value for the `includes()` method? #### --distractors-- -`'JavaScript'.charAt(2)` +If the substring is found within the string, the method returns the string otherwise, it returns `undefined`. --- -`'JavaScript'.charAt(1)` +If the substring is found within the string, the method returns `true` otherwise, it returns and empty string. --- -`'JavaScript'[2]` +If the substring is found within the string, the method returns the string otherwise, it returns `null`. #### --answer-- -`'JavaScript'[1]` +If the substring is found within the string, the method returns `true` otherwise, it returns `false`. ### --question-- @@ -43,11 +43,11 @@ Which option demonstrates string interpolation? #### --distractors-- -`'Hello, ' + user + '!'` +`"Hello, " + user + "!"` --- -`'Hello, $user!'` +`"Hello, $user!"` --- @@ -61,19 +61,19 @@ Which option demonstrates string interpolation? #### --text-- -Which option creates a string with a newline character? +Which of the following options is the newline character? #### --distractors-- -`'\t'` +`'\newline'` --- -`'\b'` +`'\new'` --- -`'\p'` +`'\line'` #### --answer-- @@ -83,73 +83,73 @@ Which option creates a string with a newline character? #### --text-- -Which option creates a string with a tab character? +Which of the following statements is correct about strings? #### --distractors-- -`'\n'` +Strings are mutable and can be changed after they are created. --- -`'\b'` +Strings are non primitive data types. --- -`'\p'` +Strings can only be created using single quotes. #### --answer-- -`'\t'` +Strings are immutable. ### --question-- #### --text-- -Which option creates a string object? +What does ASCII stand for? #### --distractors-- -`String('Hello')` +American Standard Code for Internet Information --- -`'Hello'` +Advanced Systematic Code for Internal Interchange --- -`createString('Hello')` +Automatic Standard Code for Internal Information #### --answer-- -`new String('Hello')` +American Standard Code for Information Interchange ### --question-- #### --text-- -Which option extracts a substring consisting of the first three characters from the string `JavaScript`? +Which of the following methods extracts a portion of a string and returns a new string? #### --distractors-- -`'JavaScript'.substring(3)` +`trim()` --- -`'JavaScript'.substring(0, 4)` +`indexOf()` --- -`'JavaScript'.extract(0, 3)` +`prompt()` #### --answer-- -`'JavaScript'.substring(0, 3)` +`slice()` ### --question-- #### --text-- -What is the purpose of the `prompt()` function? +What is the purpose of the `prompt()` method? #### --distractors-- @@ -171,23 +171,35 @@ It displays a dialog box that prompts the user for input. #### --text-- -What is the difference between a string object and a string primitive? +Which of the following is the correct way to access the third character of a string? #### --distractors-- -String objects have methods, string primitives do not. +```js +const developer = "Jessica"; +developer[3]; +``` --- -String primitives are created using the `String` constructor, string objects are created using string literals. +```js +const developer = "Jessica"; +developer[-1]; +``` --- -There is no difference between a string object and a string primitive. +```js +const developer = "Jessica"; +developer[0]; +``` #### --answer-- -String objects are created using the `String` constructor, string primitives are created using string literals. +```js +const developer = "Jessica"; +developer[2]; +``` ### --question-- @@ -205,7 +217,7 @@ How can you obtain the ASCII index of a character in a string? --- -`str.fromCharCode()` +`str.getCharIndex()` #### --answer-- @@ -237,139 +249,155 @@ How can you obtain the character corresponding to an ASCII value? #### --text-- -Which function converts a number variable `num` to a string? +Which of the following `indexOf` examples will correctly return -1? #### --distractors-- -`num.toNumber()` +```js +const organization = "freeCodeCamp"; + +console.log(organization.indexOf("e")); +``` --- -`num.toChar()` +```js +const organization = "freeCodeCamp"; + +console.log(organization.indexOf("f")); +``` --- -`num.toText()` +```js +const organization = "freeCodeCamp"; + +console.log(organization.indexOf("C")); +``` #### --answer-- -`num.toString()` +```js +const organization = "freeCodeCamp"; + +console.log(organization.indexOf("c")); +``` ### --question-- #### --text-- -How can you check if the string `JavaScript` contains a specific substring? +How can you check if the string `"JavaScript"` contains a specific substring? #### --distractors-- -`'JavaScript'.has()` +`"JavaScript".has()` --- -`'JavaScript'.contains()` +`"JavaScript".contains()` --- -`'JavaScript'.exists()` +`"JavaScript".exists()` #### --answer-- -`'JavaScript'.includes()` +`"JavaScript".includes()` ### --question-- #### --text-- -Which method extracts a substring from the string `JavaScript`? +Which method extracts a substring from the string `"JavaScript"`? #### --distractors-- -`'JavaScript'.splice()` +`"JavaScript".remove()` --- -`'JavaScript'.extract()` +`"JavaScript".extract()` --- -`'JavaScript'.cut()` +`"JavaScript".cut()` #### --answer-- -`'JavaScript'.slice()` +`"JavaScript".slice()` ### --question-- #### --text-- -How do you convert the string `JavaScript` to uppercase? +How do you convert the string `"JavaScript"` to uppercase? #### --distractors-- -`'JavaScript'.upper()` +`"JavaScript".upper()` --- -`'JavaScript'.toUpper()` +`"JavaScript".toUpper()` --- -`'JavaScript'.toUppercase()` +`"JavaScript".convertUpper()` #### --answer-- -`'JavaScript'.toUpperCase()` +`"JavaScript".toUpperCase()` ### --question-- #### --text-- -How do you convert the string `JavaScript` to lowercase? +How do you convert the string `"JavaScript"` to lowercase? #### --distractors-- -`'JavaScript'.lower()` +`"JavaScript".lower()` --- -`'JavaScript'.toLower()` +`"JavaScript".toLower()` --- -`'JavaScript'.toLowercase()` +`"JavaScript".convertLower()` #### --answer-- -`'JavaScript'.toLowerCase()` +`"JavaScript".toLowerCase()` ### --question-- #### --text-- -How do you replace all occurances of `a` with `b` in the string `JavaScript`? +Which of the following methods is used to find a specified value in a string and replace it with another value? #### --distractors-- -`'JavaScript'.replace('a', 'b')` +`indexOf()` --- -`'JavaScript'.replace('b', 'a')` +`replaceWith()` --- -`'JavaScript'.replaceAll('b', 'a')` +`find()` #### --answer-- -`'JavaScript'.replaceAll('a', 'b')` +`replace()` ### --question-- #### --text-- -How do you repeat a string a specified number of times? +Which method is used to repeat a string a specified number of times? #### --distractors-- @@ -395,11 +423,11 @@ What will the following code return: `'abc'.repeat(3)`? #### --distractors-- -'abcabc' +`"abcabc"` --- -'abcabcabcabc' +`"abcabcabcabc"` --- @@ -407,7 +435,7 @@ It will throw an error. #### --answer-- -'abcabcabc' +`"abcabcabc"` ### --question-- @@ -435,21 +463,29 @@ How do you remove whitespace from the beginning and end of a string? #### --text-- -Which method can be used to check if a string starts with a specific substring? +Which of the following is the correct syntax for escaping strings? #### --distractors-- -`str.beginsWith()` +```js +"She said, ?"Hello!?"" +``` --- -`str.starts()` +```js +"She said, ."Hello!."" +``` --- -`str.hasPrefix()` +```js +"She said, //"Hello!//"" +``` #### --answer-- -`str.startsWith()` +```js +"She said, \"Hello!\"" +```