JavaScript - Basic

JavaScript is the scripting language of the web. It is used in millions of pages to provide dynamic effects, client side functionalities like validation, cookie management, browser detection and server calls through Ajax. With the new version it has also added inline support for Java (provided its installed on the client machine).

	Released	Beta	Frozen
Concept 1 question Understand that JavaScript is interpreted Describe the (non)relationship/differences between JavaScript and Java	12	45	28	Add a question Beta questions
Code 2 questions Use the different ways of embedding JavaScript in web pages - the script tag in head, body, inline JavaScript Understand how to break a code line within a text string using "\" and how it is inappropriate for non string code Comment JavaScript code out, using all the existing ways	12	23	24	Add a question Beta questions
Variables 3 questions Name valid variables following the JavaScript rules - _, $, a..z A..Z followed by any number,alphabet,_,$ Respect the JavaScript variables case-sensitivity rule. Identify that JavaScript variables are not strongly typed Understand the significance of creating variables with and without 'var' Identify variable scopes	20	9	18	Add a question Beta questions
Operators 3 questions Use the following operators and describe their limitations. Arithmetic Operators (+, -, , /, %, --, ++) Assignment Operators (=, +=, /=, -=, =, %=) Comparison Operators (==, ===, !=, >, <, <=, >=, !==) Logical Operators (!, &&, \|\|) String Operators (+) Conditional Operator (?:) Write code using the following elements: Special characters (\',\",\&,\n,\t,\r,\b,\f') prototype typeof null new eval with void NaN undefined	17	39	32	Add a question Beta questions
Execution flow 4 questions Predict the execution flow of code using the following constructs: if .. else switch case default for loop while loop for .. in with statement break & continue try .. catch throw	8	2	27	Add a question Beta questions
Built-in objects 2 questions Use and create built-in objects (including using new and using eval). Strings Date Array - Initialization Boolean Math DOM Objects Just introduction to the document objects - document, window with only these functions - open(),write(),setTimeout()/clearTimeout()	11	62	17	Add a question Beta questions
Built-in functions 3 questions Identify / use built-in Functions decodeURI() decodeURIComponent() encodeURI() encodeURIComponent() escape() eval() isFinite() isNaN() Number() parseFloat() parseInt() String() unescape()	22	23	8	Add a question Beta questions
HTML events 2 questions Handle and react to HTML Events Bubble and suppress events	8	14	22	Add a question Beta questions