Final Graded Quiz: Programming with JavaScript :Mobile Development and JavaScript (Meta iOS Developer Professional Certificate) Answers 2026

Question 1

What will be the output of the following JavaScript?

✅ Green
❌ Blue
❌ syntaxError
❌ Nothing

Explanation:
Condition a == 7 || b == 5 me b == 5 true hai, isliye Green print hoga.

Question 2

❌ 5
❌ 2
✅ 7
❌ 3

Explanation:
x += 5 → 2 + 5 = 7.

Question 3

❌ Boolean
❌ String
✅ Number
❌ BigInt

Question 4

❌ undefined
❌ Pear
❌ Orange
✅ Apple

Explanation:
x = 20 aur x >= 10 true hai.

Question 5

❌ 2
❌ 0
❌ 5
✅ 10

Explanation:
Loop 5 times chala, har baar +2 → 5 × 2 = 10.

Question 6

❌ null
❌ result()
✅ undefined
❌ 7

Explanation:
Hoisting ke kaaran var result undefined hota hai jab access kiya jata hai.

Question 7

✅ The function name.
❌ The bracket notation
❌ The dot notation
❌ The assignment operator

Question 8

❌ 100
✅ 200
❌ Mileage
❌ 300

Question 9

❌ False
✅ True

Question 10

❌ The name of the method
❌ The target of the event
✅ A string describing the type of event (such as, ‘click’)
❌ A function that will handle the event

Question 11

❌ document.addElement(‘h2’)
✅ document.createElement(‘h2’)
❌ document.buildElement(‘h2’)

Question 12

❌ This syntax is invalid
❌ Invoke function without parentheses
❌ Invoke without unnecessary code
✅ Defines and exports addFive as a Node module

Question 13

❌ npm install
❌ Console.log(“Hello console!”)
❌ Console.package(install)
✅ console.log(“Hello console!”)

Question 14

❌ /* * Comment 4 */
❌ \ Comment 1
✅ // Comment 2
❌ ## ## Comment 3 ##

Question 15

❌ booleans
✅ function
❌ numbers
❌ string

Question 16

❌ == compares value & type
❌ === compares & == assigns
❌ == for numbers, === for strings
✅ == compares values, === compares values + data types

Question 17

✅ Jest
❌ JavaFrame
❌ JFrame
❌ JavaTest

Question 18

❌ True
✅ False

Question 19

✅ npm
❌ node
❌ package
❌ pkg

Question 20

❌ False
✅ True

Question 21

✅ Jest Mock functions
❌ Jest Fakes
❌ External mock libraries
❌ Jest Snapshot

Question 22

✅ End-to-end testing
❌ Unit testing
❌ Post-hoc testing
❌ Integration testing

Question 23

❌ let
❌ var
❌ No such declaration
✅ const

Question 24

❌ Bonus overrides getLayers
❌ Console.log prints 2
❌ Bonus cannot be updated
✅ Constructor error → undefined output

Question 25

❌ undefined
✅ meow is replaced by growl
❌ growl replaced by meow
❌ syntaxError

Question 26

✅ 2
❌ undefined
❌ [1,2,3,4]
❌ 1

Question 27

✅ True
❌ False

Question 28

❌ JSON.toString
❌ JSON.stringify
❌ JSON.fromString
✅ JSON.parse

Question 29

❌ Object literal
❌ Specific object
❌ Instance of class
✅ Function that creates an object instance

Question 30

✅ Keeps data and functionality grouped in objects
❌ Keeps them separate
❌ Only data grouped
❌ Writing efficient code

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