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Here I am listing some good javascript questions to practice

Easy

  1. Given a and b, your function should return the value of ab Example: Input: power(2,3) ––> Output: 8

  2. Given length of a regular hexagon, your function should return area of the hexagon. Example: Input: areaOfHexagon(10) ––> Output: 259.80

  3. Given a sentence, your functions should return the number of words in the sentence. Example: Input: noOfWords(We are neoGrammers) ––> Output: 3

  4. Given n numbers, your function should return the minimum of them all. The number of parameters won't be accepted from user. Example: Input: findMin(3,5) ––> Output: 3 Input: findMin(3,5,9,1) ––> Output: 1 (Hint: Lookup rest parameters in JavaScript)

  5. Given n numbers, your function should return the maximum of them all. The number of parameters won't be accepted from user. Example: Input: findMax(3,5) ––> Output: 5 Input: findMax(3,5,9,1) ––> Output: 9 (Hint: Lookup rest parameters in JavaScript)

  6. Given three angles of a triange, your function should return if it is a scalen, isosceles, equilateral triangle or not a triangle at all. Example: Input: typeOfTriangle(30, 60, 90) ––> Output: Scalen Triangle

Medium

  1. Given an array, your function should return the length of the array. Example: Input: arrayLength([1,5,3,7,8]) ––> Output: 5

  2. Given an array and an item, your function should return the index at which the item is present. Example: Input: indexOf([1,6,3,5,8,9], 3) ––> Output: 2

  3. Given an array and two numbers, your function should replace all entries of first number in an array with the second number. Example: Input: replace([1,5,3,5,6,8], 5, 10) ––> Output: [1,10,3,10,6,8]

  4. Given two arrays, your function should return single merged array. Example: Input: mergeArray([1,3,5], [2,4,6]) ––> Output: [1,3,5,2,4,6]

  5. Given a string and an index, your function should return the character present at that index in the string. Example: Input: charAt("neoGcamp", 4) ––> Output: c

  6. Given two dates, your function should return which one comes before the other. Example: Input: minDate('02/05/2021', '24/01/2021') ––> Output: 24/01/2021

Advanced

  1. Write a function which generates a secret code from a given string, by shifting characters of alphabet by N places. Example: Input: encodeString("neogcamp", 2) ––> Output: pgqiecor Explanation: 2 represents shifting alphabets by 2 places. a –> c, b –> d, c –> e and so on.

  2. Given a sentence, return a sentence with first letter of all words as capital. Example: Input: toSentenceCase('we are neoGrammers') ––> Output: We Are NeoGrammers

  3. Given an array of numbers, your function should return an array in the ascending order. Example: Input: sortArray([100,83,32,9,45,61]) ––> Output: [9,32,45,61,83,100]

  4. Given a sentence, your function should reverse the order of characters in each word, keeping same sequence of words. Example: Input: reverseCharactersOfWord('we are neoGrammers') –––> Output: ew era sremmarGoen