Question

Java-Script Concept quiz:

Answer 1

Answer:

Explanation:

1) the versions of JavaScript that are fully supported by all modern browsers ( Except internet explorer 9) are:

C. ECMAScript 3, ECMAScript 5

2) JavaScript is used to implement complex features on a_____

A. web page

3) computer programming tools that are used to store data are called____

C. variables

4) var name = Scott; is the code to create a ____ called "Scott"

D. None of the above

Scott is a variable

5) the key difference between "var" and "let" variables is that____

D. None of the above  

let is used to redefine a variable by using var to redefine may cause problems

6) Hoisting in JavaScript is the process whereby declarations get moved to the____

C. top

7) Im JavaScript, "/ /" is used to code____

A. comments

8) ______ data types have two potential values - true and false.

D. None of the above

Boolean is the data type and null is always false

9) Using ____ gives coders the ability to query data set data to create blueprints.

C. consoles

The Console object provides access to the browser's debugging console.