JavaScript Test: Ultimate Trivia Quiz!

34 Questions | By Mabotn | Updated: Dec 16, 2022 | Attempts: 641

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JavaScript Test: Ultimate Trivia Quiz! - Quiz

Questions and Answers

1.

Given x = new Date(), how do you represent x as a String in universal time (time zone +0000)?
- A.
  
  X.getUTC();
- B.
  
  X.getUTCDate();
- C.
  
  X.toUTCString();
2.

Where the < script > tag can be used
- A.
  
  In the < head > tag
- B.
  
  In the < body > tag
- C.
  
  Both < head > and < body > tags
3.

What does JSON stand for?
- A.
  
  JavaScript Oriented Notation
- B.
  
  JavaScript Object Notation
- C.
  
  JavaScript Online Notation
4.

Given the following, what is the value of x? var x = typeof "abc";
- A.
  
  Abc
- B.
  
  String
- C.
  
  Undefined
- D.
  
  Error
5.

Variable x has a value of 5. Variable y has a value of 7 x < 7 && y > 6
- A.
  
  True
- B.
  
  False
6.

Is javascript case sensitive ?
- A.
  
  True
- B.
  
  False
7.

To convert string to number, which function do we use ?
- A.
  
  ParseNumber
- B.
  
  ParseString
- C.
  
  ParseInt
- D.
  
  ParseDouble
8.

In javascript, is it required having semi-colon " ; " at the end of the statement ?
- A.
  
  True
- B.
  
  False
9.

How do you check what the type of a value in variable x is?
- A.
  
  Gettype(x)
- B.
  
  Typeof(x)
- C.
  
  Object.type(x)
- D.
  
  X.type
10.

What is the value of the following express: 8 % 3
- A.
  
  5
- B.
  
  2
- C.
  
  24
- D.
  
  NaN
11.

You need to update the content of a <div> using the following code, complete the missing part <div id="myDiv"></div> <script> document.getElementById('myDiv').MISSING_PART = "new content" </script>
- A.
  
  Innerhtml
- B.
  
  InnerHtml
- C.
  
  InnterHtml
- D.
  
  InnerHTML
12.

What's the output of the following code var name = 'John', age = 20 console.log(`Hi, my name is ${name.toUpperCase()} and I'm ${++age} years old`)
- A.
  
  Hi, my name is John and I'm 20 years old
- B.
  
  Hi, my name is John and I'm 21 years old
- C.
  
  Hi, my name is JOHN and I'm 20 years old
- D.
  
  Hi, my name is JOHN and I'm 21 years old
13.

How to access the current element using DOM <input type="radio" name="gender" value="Male">
- A.
  
  Document.getElementById
- B.
  
  Document.getElementByName
- C.
  
  Document.getElementsByName
- D.
  
  Document.getElement
14.

Which of these is not a logical operator?
- A.
  
  !
- B.
  
  &
- C.
  
  &&
- D.
  
  ||
15.

What is the value of the variable a? var a = "cat".length * 2;
- A.
  
  3
- B.
  
  6
- C.
  
  0
- D.
  
  1
16.

What is the value of x ? var a = false; var x = a ? “A” : “B”;
- A.
  
  Undefined
- B.
  
  True
- C.
  
  "A"
- D.
  
  "B"
17.

How would one declare a string variable?
- A.
  
  Var name = "John"
- B.
  
  Var names = "7"
- C.
  
  Var firstname = new String("John")
- D.
  
  Any of these
18.

Dvising a number by zero in JavaScript returns
- A.
  
  Error with exception
- B.
  
  NaN
- C.
  
  Infinity
19.

How do you round the number 11.25, to the nearest whole number?
- A.
  
  Math.round
- B.
  
  Math.rnd
- C.
  
  Round
- D.
  
  Rnd
20.

What is the value of "b" var a = "A"; var b = a.concat("B");
- A.
  
  ["A", "B"]
- B.
  
  "AB"
- C.
  
  "A"
- D.
  
  "B"
21.

Which event fires whenever a control loses focus?
- A.
  
  On click
- B.
  
  On move
- C.
  
  On keydown
- D.
  
  On blur
22.

Which of the following is the equivalent of the following snippet if (a) { x = b; } else { x = c; }
- A.
  
  X = a : b ? c
- B.
  
  X = a ? b : c
- C.
  
  X = a ? b , c
- D.
  
  X = a ? b || c
23.

Which of the following events is used to handle the user click action
- A.
  
  Click
- B.
  
  Clicked
- C.
  
  Onclick
24.

Which message does the following log to the console? bar(); function bar() { console.log('bar'); }
- A.
  
  Undefined
- B.
  
  TypeError
- C.
  
  SyntaxError
- D.
  
  "bar"
25.

What is the value of x? var x = '1'+2+3;
- A.
  
  6
- B.
  
  15
- C.
  
  "123"
- D.
  
  The statement generates an error