What will be the output of the following code? var sayHi = function() { return 'Hi'; }; console.log(sayHi());
A). Hi
B). undefined
C). sayHi
D). 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
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 multiply = (x, y) => x * y; console.log(multiply(3, 4));
A). 12
B). 34
C). multiply
D). undefined
What will be the output of the following code? var counter = (function() { var count = 0; return function() { return ++count; }; })(); console.log(counter()); console.log(counter());
A). 1, 2
B). 0, 1
C). undefined, undefined
D). 2, 4
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 assign a function to a variable in JavaScript?
A). var greet = function() { alert('Hello'); };
B). var greet = function { alert('Hello'); };
C). function greet() { alert('Hello'); }
D). var greet = function alert('Hello');
Which of the following correctly demonstrates a function returning another function?
A). function outer() { return function() { alert('Inner'); }; }
B). function outer() { function() { alert('Inner'); } return; }
C). function outer() { function() { alert('Inner'); }; }
D). function outer() { return function { alert('Inner'); }; }
How can you store a function as a property of an object?
A). var obj = { method: function() { alert('Hello'); } };
B). var obj = { method: alert('Hello'); };
C). var obj = { method: function { alert('Hello'); } };
D). var obj = { function() { alert('Hello'); } };