JavaScript

Question 1

The container (in animation) should be created with the style …… and the animation element should be created in the style ……..

Answer 1

position : relative

position : absolute

Question 2

code to display date

Answer 2

document.getElementById(“demo”).innerHTML = “Date : “ + Date();

Question 3

Mention the 3 parts of the W3C DOM.

Answer 3

Core DOM - standard model for all document types
XML DOM - standard model for XML documents
HTML DOM - standard model for HTML documents

Question 4

what is W3C?

Answer 4

world wide web consortium

Question 5

How is HTML DOM model is constructed?

Answer 5

As a tree of objects

Question 6

what are templates for js objects

Answer 6

js classes

Question 7

mention the keyword that you use when you create class inheritance

Answer 7

extends

Question 8

define debugging

Answer 8

searching for and fixing errors in programming code// process of testing/ finding and reducing bugs

Question 9

what is breakpoint

Answer 9

places where code execution can be stooped

Question 10

what does debugger keyword do?

Answer 10

stops the execution of js and (if available) calls the debugging function

Question 11

explain this keyword in regular function

Answer 11

In regular functions the this keyword represented the object that called the function, which could be the window, the document, a button or whatever.

Question 12

Explain this keyword in arrow function

Answer 12

With arrow functions the this keyword always represents the object that defined the arrow function.

Question 13

explain js modules and its statements

Answer 13

• It allows you to break up your code into seperate files and it relies on import and export statements

Question 14

what are the two types of exports?

Answer 14

There are two types of exports: Named and Default.

Question 15

what does JSON stand for ?

Answer 15

JSON stands for JavaScript Object Notation

Question 16

strict mode doesn’t allow ……………

Answer 16

undeclared variables

Question 17

1 . let x = 10;
switch(x) {
  case 10: alert("Hello");
}
2.let x = 10;
switch(x) {
  case "10": alert("Hello");
}

which piece of code will display an alert

Answer 17

1st one

Question 18

which statement should not be broken?

Answer 18

return

Question 19

what are associative arrays?

Answer 19

arrays with named indexes

Question 20

what happens when you use named indexes?

Answer 20

If you use a named index, when accessing an array, JavaScript will redefine the array to a standard object.

Question 21

How do you extract and display js objects?

Answer 21

alert(objectname.property)

Question 22

math method to find largest of two numbers

Answer 22

Math.max