_id: 645147516c245de4d11eb7ba
title: Example Certification Exam
numberOfQuestionsInExam: 5
passingPercent: 70
questions:
  - id: vjxyn2ngzs
    question: Which of the following is NOT a JavaScript data type?
    wrongAnswers:
      - id: h1x269fts9
        answer: Integer
      - id: 3x3j6ts2sb
        answer: Boolean
      - id: 9g4ix2tr1z
        answer: Symbol
      - id: n1rfllrvvy
        answer: String
      - id: 33oq8q3aio
        answer: Bigint
      - id: 7w1gaddxup
        answer: Undefined
      - id: ywgqr2wp6i
        answer: Object
    correctAnswers:
      - id: ydmnlkjviv
        answer: Array
      - id: sy2trjs7p8
        answer: Float
  - id: lpmv63p5sv
    question: What does the `NaN` keyword represent in JavaScript?
    wrongAnswers:
      - id: 3cxs9as4bt
        answer: Not a Node
      - id: axn8omt3zf
        answer: Null and None
      - id: 7ssyazt4zu
        answer: No Assignment Named
      - id: do4cm37x7y
        answer: Negative Assertion Needed
      - id: r2hbfnrodz
        answer: Never Allow Null
    correctAnswers:
      - id: ah5kkj38s1
        answer: Not a Number
  - id: g2hudvmgoj
    question: >-
      Which method is used to remove the last element from an array in
      JavaScript?
    wrongAnswers:
      - id: jrxd1hjv63
        answer: '`shift()`'
      - id: udc3kecrqn
        answer: '`unshift()`'
      - id: a12aysp2et
        answer: '`slice()`'
      - id: xljr0lkb0n
        answer: '`splice()`'
      - id: qe4z3kxgyz
        answer: '`concat()`'
    correctAnswers:
      - id: gwddf01p89
        answer: '`pop()`'
  - id: 7tfdjebrnq
    question: >-
      What is the correct way to create a new instance of an object in
      JavaScript?
    wrongAnswers:
      - id: 5bygwpaz4d
        answer: '`Object.create(MyObject);`'
      - id: h5s3304gbl
        answer: '`MyObject.create();`'
      - id: mdsjsjpi9t
        answer: '`Object.new(MyObject);`'
      - id: 3o8otd8j9h
        answer: '`MyObject.new();`'
      - id: h4ozml27zn
        answer: '`MyObject.instance();`'
        deprecated: true
    correctAnswers:
      - id: qbfhqmnedn
        answer: '`new MyObject();`'
  - id: hx0gxr5yjc
    question: What is the purpose of the `querySelectorAll` method in JavaScript?
    deprecated: true
    wrongAnswers:
      - id: 71iry42cy1
        answer: To select all elements with a specific ID
      - id: jjyk5e9e1l
        answer: To select all elements of a specific tag name
      - id: k5tpc2o2q8
        answer: To select all child elements of a specific parent
      - id: s3cm1tq4wt
        answer: To select all elements with a specific attribute
      - id: l1gtuheh87
        answer: To select elements based on their position in the DOM
    correctAnswers:
      - id: e6xz6zdpxr
        answer: To select all elements with a specific class name
  - id: eigcj3e0mg
    question: Which operator is used to compare two values for equality in JavaScript?
    wrongAnswers:
      - id: ltgdcoyonb
        answer: '`!=`'
      - id: f3szfel7x6
        answer: '`<`'
      - id: b0meyxhvtu
        answer: '`>`'
      - id: 31dd0pte4i
        answer: '`<=`'
      - id: 9u8bi7wqa2
        answer: '`>=`'
    correctAnswers:
      - id: fmo9sof6v2
        answer: '`==`'
        deprecated: true
      - id: tl6eo06r4x
        answer: '`===`'
  - id: l5f2beg2ih
    question: >-
      Which of the following statements is used to terminate a loop in
      JavaScript?
    wrongAnswers:
      - id: kqi1fg8vtm
        answer: stop
      - id: a2clf7fmyx
        answer: exit
      - id: v58wx865e7
        answer: return
      - id: 5mgeaetnf0
        answer: halt
      - id: 2u73kyry6o
        answer: skip
    correctAnswers:
      - id: 7j046bkjmf
        answer: break
  - id: atuq2zwg4h
    question: What is the correct syntax to define a function in JavaScript?
    wrongAnswers:
      - id: dusl68wx2o
        answer: '`function myFunction {}`'
      - id: dlwjt59a5s
        answer: '`def myFunction():`'
      - id: 98p8ai27ko
        answer: '`function = myFunction {}`'
      - id: 7ciq8sood9
        answer: '`function myFunction():`'
    correctAnswers:
      - id: wc3h7uc4zn
        answer: '`function myFunction() {}`'
  - id: 3ne0ju7yzq
    question: >-
      Which of the following methods is used to add a new element to the end of
      an array in JavaScript?
    wrongAnswers:
      - id: fytb9yvbug
        answer: shift()
      - id: wnc31qc1ie
        answer: unshift()
      - id: 22mi7j64h5
        answer: pop()
      - id: da96ukvtol
        answer: splice()
      - id: gc6elnmtzw
        answer: concat()
    correctAnswers:
      - id: pymbxhyn12
        answer: push()