JavaScript Strings Quiz

To pass the quiz, you must correctly answer at least 18 of the 20 questions below. # --quizzes-- ## --quiz-- ### --question-- #### --text-- What is the return value for the `includes()` method? #### --distractors-- If the substring is found within the string, the method returns the string. Otherwise, it returns `undefined`. --- If the substring is found within the string, the method returns `true`. Otherwise, it returns an empty string. --- If the substring is found within the string, the method returns the string. Otherwise, it returns `null`. #### --answer-- If the substring is found within the string, the method returns `true`. Otherwise, it returns `false`. ### --question-- #### --text-- Which option demonstrates string interpolation? #### --distractors-- `"Hello, " + user + "!"` --- `"Hello, $user!"` --- `` `Hello, {user}!` `` #### --answer-- `` `Hello, ${user}!` `` ### --question-- #### --text-- Which of the following options is the newline character? #### --distractors-- `\newline` --- `\new` --- `\line` #### --answer-- `\n` ### --question-- #### --text-- Which of the following statements is correct about strings? #### --distractors-- Strings are mutable and can be changed after they are created. --- Strings are non primitive data types. --- Strings can only be created using single quotes. #### --answer-- Strings are immutable. ### --question-- #### --text-- What does ASCII stand for? #### --distractors-- American Standard Code for Internet Information --- Advanced Systematic Code for Internal Interchange --- Automatic Standard Code for Internal Information #### --answer-- American Standard Code for Information Interchange ### --question-- #### --text-- Which of the following methods extracts a portion of a string and returns a new string? #### --distractors-- `trim()` --- `indexOf()` --- `prompt()` #### --answer-- `slice()` ### --question-- #### --text-- What is the purpose of the `prompt()` method? #### --distractors-- It displays a message in the console. --- It displays an alert box with a message. --- It displays a confirmation box with a message. #### --answer-- It displays a dialog box that waits for the user input. ### --question-- #### --text-- Which of the following is the correct way to access the third character of a string? #### --distractors-- ```js const developer = "Jessica"; developer[3]; ``` --- ```js const developer = "Jessica"; developer[-1]; ``` --- ```js const developer = "Jessica"; developer[0]; ``` #### --answer-- ```js const developer = "Jessica"; developer[2]; ``` ### --question-- #### --text-- How can you obtain the ASCII value of the first character in the string `"hello"`? #### --distractors-- `"hello".charCode(0)` --- `"hello".codeAt(0)` --- `"hello".getCharIndex(0)` #### --answer-- `"hello".charCodeAt(0)` ### --question-- #### --text-- Which method can you use to obtain the character corresponding to an ASCII value? #### --distractors-- `toASCII()` --- `toChar()` --- `toCode()` #### --answer-- `fromCharCode()` ### --question-- #### --text-- Which of the following `indexOf` examples will log `-1` to the console? #### --distractors-- ```js const organization = "freeCodeCamp"; console.log(organization.indexOf("e")); ``` --- ```js const organization = "freeCodeCamp"; console.log(organization.indexOf("f")); ``` --- ```js const organization = "freeCodeCamp"; console.log(organization.indexOf("C")); ``` #### --answer-- ```js const organization = "freeCodeCamp"; console.log(organization.indexOf("c")); ``` ### --question-- #### --text-- How can you check if the string `"JavaScript"` contains `"Script"`? #### --distractors-- `"JavaScript".has("Script")` --- `"JavaScript".contains("Script")` --- `"JavaScript".exists("Script")` #### --answer-- `"JavaScript".includes("Script")` ### --question-- #### --text-- Which of the following extracts the substring `"Script"` from the string `"JavaScript"`? #### --distractors-- `"JavaScript".find(5)` --- `"JavaScript".extract(4)` --- `"JavaScript".cut(5)` #### --answer-- `"JavaScript".slice(4)` ### --question-- #### --text-- How do you convert the string `"JavaScript"` to uppercase? #### --distractors-- `"JavaScript".upper()` --- `"JavaScript".toUpper()` --- `"JavaScript".convertUpper()` #### --answer-- `"JavaScript".toUpperCase()` ### --question-- #### --text-- How do you convert the string `"JavaScript"` to lowercase? #### --distractors-- `"JavaScript".lower()` --- `"JavaScript".toLower()` --- `"JavaScript".convertLower()` #### --answer-- `"JavaScript".toLowerCase()` ### --question-- #### --text-- Which of the following will replace `"dogs"` with `"cats"` in the string `"I love dogs"`. #### --distractors-- `"I love dogs".slice("dogs", "cats")` --- `"I love dogs".replaceWith("dogs", "cats")` --- `"I love dogs".find("dogs", "cats")` #### --answer-- `"I love dogs".replace("dogs", "cats")` ### --question-- #### --text-- Which method is used to repeat a string a specified number of times? #### --distractors-- `times()` --- `repeatTimes()` --- `repeatNumber()` #### --answer-- `repeat()` ### --question-- #### --text-- What will the following code return: `"abc".repeat(3)`? #### --distractors-- `"abcabc"` --- `"abcabcabcabc"` --- It will throw an error. #### --answer-- `"abcabcabc"` ### --question-- #### --text-- Which method will remove whitespace from the beginning and end of a string? #### --distractors-- `strip()` --- `removeWhitespace()` --- `trimWhitespace()` #### --answer-- `trim()` ### --question-- #### --text-- Which of the following is the correct syntax for escaping quotes? #### --distractors-- ```js "She said, ?"Hello!?"" ``` --- ```js "She said, ."Hello!."" ``` --- ```js "She said, //"Hello!//"" ``` #### --answer-- ```js "She said, \"Hello!\"" ```