JavaScript Operators

JavaScript Operators

Easy Questions

JavaScript

JavaScript Statements
JavaScript Variables
JavaScript Operators
JavaScript Functions
JavaScript For Loop
JavaScript While Loop
  1. The expression of calling ( or executing ) a function or method in JavaScript is called ________










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    NA

    Correct Option: D

    An invocation expression is JavaScript’s syntax for calling (or executing) a function or method) It starts with a function expression that identifies the function to be called.

  1. Consider the following statements.
    var t= "Example: 4, 5, 6"; // text
    var p = /\d+/g // Matches all instances of one or more digits

    In order to check if the pattern matches with the string “t”, the statement is










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    NA

    Correct Option: A

    The given pattern is applied on the text given in the parenthesis.

  1. The property of a primary expression is ____________










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    NA

    Correct Option: C

    The simplest expressions, known as primary expressions, are those that stand alone — they do not include any simpler expressions. Primary expressions in JavaScript are constant or literal values, certain language keywords, and variable references.

  1. A function definition expression can be called as __________










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    NA

    Correct Option: D

    A function definition expression is a “function literal” in the same way that an object initializer is an “object literal.” A Function definition expression typically consists of the keyword function followed by a comma-separated list of zero or more identifiers (the parameter names) in parentheses and a block of JavaScript code (the function body) in curly braces.

  1. What will be the output of the following Javascript code?
    var str1 = ”4321”;
    var intval = 4321;
    alert( str1 + intval );










  1. View Hint View Answer Discuss in Forum

    NA

    Correct Option: B

    In JavaScript the alert function does the type casting and converts the integer value to string. After that it concatenates both the strings and shows the result as a concatenated string. Thus 43214321 would be correct.