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
What is the output of function sayHi() { return 'Hi'; } alert(sayHi());?
A). sayHi
B). Hi
C). undefined
D). alert
How do you invoke a method named greet on an object person?
A). person.greet;
B). person.greet();
C). greet(person);
D). persongreet;
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 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[];
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 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
What is the output of function test() { return 2 + 2; } console.log(test());?
A). 22
B). 2 + 2
C). 4
D). test
How do you define and invoke a function to calculate the square of a number in one step?
A). var square = function(n) { return n * n; }; square(5);
B). (function(n) { return n * n; })(5);
C). function square(n) { return n * n; } square(5);
D). var square = (n) { return n * n; }; square(5);