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

What does return without a value return?

A). 0

B). null

C). undefined

D). NaN

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

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

Which of the following correctly invokes a function with parameters?

A). function myFunc(a, b) { }; myFunc(a b);

B). function myFunc(a, b) { }; myFunc(a, b);

C). function myFunc(a b) { }; myFunc(a, b);

D). function myFunc(a, b) { }; myFunc[];

What is the output of function sayHi() { return 'Hi'; } alert(sayHi());?

A). sayHi

B). Hi

C). undefined

D). alert

How can you invoke a function stored in a variable myFunc?

A). myFunc();

B). call myFunc;

C). myFunc[];

D). invoke(myFunc);

How can you invoke a function using the call method?

A). myFunction.call();

B). myFunction.call(this);

C). call.myFunction();

D). call(myFunction);

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

A). person.greet;

B). person.greet();

C). greet(person);

D). persongreet;

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

A). function() {}();

B). (function() {})();

C). function() {}

D). (function {})();

How do you invoke a function named myFunction?

A). myFunction;

B). call myFunction();

C). myFunction();

D). myFunction[];