How do you invoke a function named myFunction?
A). myFunction;
B). call myFunction();
C). myFunction();
D). myFunction[];
What will function greet() { console.log('Hi'); } var x = greet; x(); output?
A). Hi
B). undefined
C). x
D). greet
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 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
Which of the following is an example of an Immediately Invoked Function Expression (IIFE)?
A). function() {}();
B). (function() {})();
C). function() {}
D). (function {})();
How can you invoke a function named init only once when the script runs?
A). init;
B). (init)();
C). init();
D). function init() {}();
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 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);
Which of these is the correct way to define and immediately invoke a function?
A). function() { return 1; };
B). (function() { return 1; })();
C). function() { return 1; }();
D). function {}()
What does return without a value return?
A). 0
B). null
C). undefined
D). NaN