JavaScript MCQs with answers Page - 59

Here, you will find a collection of MCQ questions on JavaScript. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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Q. Where is the right place to insert JavaScript code?

  • (A) <head> section
  • (B) The two sections <head> and <body> are correct
  • (C) <body> section
  • (D) None of the above

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Q. How do you write “Hello World” in an alert box?

  • (A) msg("Hello World");
  • (B) alert("Hello World");
  • (C) msgBox("Hello World");
  • (D) alertBox("Hello World");

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Q. How to write an IF condition in JavaScript?

  • (A) if a = 2 then
  • (B) if a = 2
  • (C) if a == 2 else
  • (D) if (a == 2)

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Q. How to write an IF condition to check if “a” is NOT equal to 2?

  • (A) if a <> 2
  • (B) if (a != 2)
  • (C) if a =! 2 then
  • (D) if (a <> 2)

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Q. How to create a function in JavaScript?

  • (A) function f()
  • (B) function = f()
  • (C) function:f()
  • (D) None of the above

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Q. What is the correct syntax for checking the value of “c”?

  • (A) if (c == "XYZ") then { } else { }
  • (B) if (c = "XYZ") then { } else { }
  • (C) if (c == "XYZ") { } else { }
  • (D) if (c = "XYZ") { } else { }

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Q. How to declare an array of 10 elements in JavaScript?

  • (A) arr = new Array(10)
  • (B) var arr[10]
  • (C) var arr = array(10)
  • (D) var arr(10)

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Q. How to get a random number between 5 and 9 inclusive?

  • (A) Math.floor((Math.random() * 5) + 4);
  • (B) Math.floor((Math.random() * 4) + 4);
  • (C) Math.floor((Math.random() * 4) + 5);
  • (D) Math.floor((Math.random() * 5) + 5);

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Q. To check if three variables are equal, we are going to use_____?

  • (A) X = Y = Z
  • (B) (X == B) && (Y == Z)
  • (C) (X = B) && (Y = Z)
  • (D) (X == B) & (Y == Z)

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Q. How many parameters can be passed to a function?

  • (A) Any
  • (B) As much as you want
  • (C) One for each argument
  • (D) One argument

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