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 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 is the output of function sum(a, b) { return a + b; } console.log(sum(3, 4));?
A). 34
B). 7
C). undefined
D). sum
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 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);
What is the output of function test() { return 2 + 2; } console.log(test());?
A). 22
B). 2 + 2
C). 4
D). test
What does return without a value return?
A). 0
B). null
C). undefined
D). NaN
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 function named myFunction?
A). myFunction;
B). call myFunction();
C). myFunction();
D). myFunction[];
How do you invoke a method named greet on an object person?
A). person.greet;
B). person.greet();
C). greet(person);
D). persongreet;