How do you assign a function to a variable in JavaScript?

How do you create an Immediately Invoked Function Expression (IIFE)?

A). (function() { alert('IIFE'); })();

B). function() { alert('IIFE'); }();

C). (function { alert('IIFE'); })();

D). function() { alert('IIFE'); };

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

A). doSomething();

B). call doSomething;

C). doSomething[];

D). invoke(doSomething);

Which of the following is true about functions in JavaScript?

A). Functions can be assigned to variables

B). Functions can be passed as arguments to other functions

C). Functions can be returned from other functions

D). All of the above

What is the term for a function that is passed as an argument to another function?

A). Callback function

B). Nested function

C). Helper function

D). Inner function

What is the output of the following code? var person = { name: 'Alice', greet: function() { return 'Hello, ' + this.name; } }; console.log(person.greet());

A). Hello, Alice

B). Hello, undefined

C). Hello, name

D). undefined

What will be the output of the following code? var double = function(x) { return x * 2; }; console.log(double(5));

A). 10

B). 5

C). undefined

D). double

How do you define a function using a function expression?

A). var myFunc = function() { alert('Hello'); };

B). function myFunc() { alert('Hello'); }

C). var myFunc = function { alert('Hello'); };

D). var myFunc() { alert('Hello'); }

Which of the following is an example of an arrow function assigned to a variable?

A). var add = (a, b) => { return a + b; };

B). var add = (a, b) => return a + b;

C). var add = (a, b) => { a + b };

D). var add = (a, b) { return a + b; };

What will be the output of the following code? var add = new Function('a', 'b', 'return a + b'); console.log(add(2, 3));

A). 5

B). add

C). undefined

D). 2 3

What is the output of the following code? function makeAdder(a) { return function(b) { return a + b; }; } var add5 = makeAdder(5); console.log(add5(2));

A). 7

B). 5

C). add5

D). makeAdder