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

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

What does return without a value return?

A). 0

B). null

C). undefined

D). NaN

How can you invoke a function named init only once when the script runs?

A). init;

B). (init)();

C). init();

D). function init() {}();

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

What is the output of var test = function() { return 5; }; console.log(test());?

A). test

B). 5

C). undefined

D). function

What will function greet() { console.log('Hi'); } var x = greet; x(); output?

A). Hi

B). undefined

C). x

D). greet

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

How do you invoke a function named myFunction?

A). myFunction;

B). call myFunction();

C). myFunction();

D). myFunction[];

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

How can you invoke a function using the call method?

A). myFunction.call();

B). myFunction.call(this);

C). call.myFunction();

D). call(myFunction);