The () Operator Invokes the Function Mockest | JavaScript

1.

What is the main purpose of the () operator in JavaScript functions?

A). To define a function B). To invoke a function C). To declare a variable D). To create an object

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2.

How do you invoke a function named myFunction?

A). myFunction; B). call myFunction(); C). myFunction(); D). myFunction[];

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3.

What is the output of function test() { return 2 + 2; } console.log(test());?

A). 22 B). 2 + 2 C). 4 D). test

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4.

Which of the following is an example of an Immediately Invoked Function Expression (IIFE)?

A). function() {}(); B). (function() {})(); C). function() {} D). (function {})();

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5.

How can you invoke a function using the call method?

A). myFunction.call(); B). myFunction.call(this); C). call.myFunction(); D). call(myFunction);

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6.

What is the result of invoking a function without parentheses, like myFunction?

A). The function gets executed B). The function returns undefined C). The function is referenced but not executed D). The function throws an error

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7.

What is the output of function sum(a, b) { return a + b; } console.log(sum(3, 4));?

A). 34 B). 7 C). undefined D). sum

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8.

How do you invoke a method named greet on an object person?

A). person.greet; B). person.greet(); C). greet(person); D). persongreet;

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9.

What does return do inside a function?

A). Stops the function B). Returns a value to the caller C). Both A and B D). Declares a variable

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10.

What happens if a function is invoked without parentheses in an event handler like onclick="myFunction"?

A). The function is executed immediately B). The function reference is assigned C). An error is thrown D). The function does not work

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The () Operator Invokes the Function Mocktest

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