Basic And Variables

Underscore can be used as first letter while declaring variable in JavaScript.

Variable declared inside JavaScript Function will be called as ____________.

Local Variables are destroyed after execution of function.

What are the three important manipulations done in a for loop on a loop variable?

One of the special feature of an interpreter in reference with the for loop is that

What will happen if the body of a for/in loop deletes a property that has not yet been enumerated?

What will be the step of the interpreter in a jump statement when an exception is thrown?

Among the keywords below, which one is not a statement?

The unordered collection of properties, each of which has a name and a value is called

A function definition expression can be called

The property of a primary expression is

The JavaScript’s syntax calling ( or executing ) a function or method is called

What kind of an expression is “new Point(2,3)”?

Which of the operator is used to test if a particular property exists or not?

Among the following, which one is a ternary operator?

“An expression that can legally appear on the left side of an assignment expression.” is a well known explanation for variables, properties of objects, and elements of arrays. They are called

JavaScript is a _______________ language

The output for the following code snippet would most appropriately be var a = 5 , b = 1 var obj = { a : 10 } with( obj ) { alert ( b ) }

A conditional expression is also called a

A statement block is a

When an empty statement is encountered, a JavaScript interpreter

The “var” and “function” are

Consider the following statements switch( expression ) { statements } In the above switch syntax, the expression is compared with the case labels using which of the following operator(s) ?

The enumeration order becomes implementation dependent and non-interoperable if :

JavaScript is invented by ________.

JavaScript was invented at _______ Lab.

Variable can hold ________ value at a time.

We can declare ___________ at a time. Select most appropriate option.

Spaces,Punctuation marks are called as __________ Symbols in JavaScript.

Java Script Variable should be Case ___________.

Initialization of variable can be done by writing _____ operator in between variable name and operand value.

Multiple Declarations of variables are separated by ___________ symbol.

JavaScript Code can be called by using

The type of a variable that is volatile is

A hexadecimal literal begins with

The generalised syntax for a real number representation is

When there is an indefinite or an infinity value during an arithmetic value computation, javascript

Which of the following is not considered as an error in JavaScript?

The escape sequence ‘f’ stands for

The snippet that has to be used to check if “a” is not equal to “null” is

The statement a===b refers to

Assume that we have to convert “false” that is a non-string to string. The command that we use is (without invoking the “new” operator)

The development environment offers which standard construct for data validation

The main purpose of a “Live Wire” in NetScape is to

The script tag must be placed in

A JavaScript program developed on a Unix Machine

JavaScript is ideal to

Which attribute is used to specify that the script is executed when the page has finished parsing ( only for external scripts )

JavaScript can be written

Which of the following Attribute is used to include External JS code inside your HTML Document

A proper scripting language is a

The object has three object attributes namely

A linkage of series of prototype objects is called as :

To determine whether one object is the prototype of (or is part of the prototype chain of) another object, one should use the

The purpose of extensible attribute is to

The basic purpose of the toLocaleString() is to

Javascript is _________ language.

JavaScript is ______ Side Scripting Language.

JavaScript is designed for following purpose

JavaScript Code is written inside file having extension __________.

Local Browser used for validations on the Web Pages uses __________.

We can embed JS code inside HTML directly ?

JavaScript Code can be called by using _________.

JS code included inside head section is loaded before loading page.

It is good to include JS code inside footer section in order to speed up the Page loading time of Webpage.

Which attribute is used to specifies that the script is executed when the page has finished parsing (only for external scripts)

Which was the first browser to support JavaScript ?

Consider the following code snippet : var book = { " main title ": " JavaScript " , ' sub-title ': " The Definitive Guide " , " for ": " all audiences " ,
author : { firstname : " David " ,
surname : " Flanagan " }
}

In the above snippet, firstname and surname are

Consider the below given syntax book [ datatype ] = assignment_value

In the above syntax, the datatype within the square brackets must be

Consider the following code snippet function f () {}

The above prototype represents a

Identify the process done in the below code snippet o = { x : 1 , y :{ z :[false,null, "" ]}}

s = JSON . stringify ( o )

p = JSON . parse ( s )

Consider the following snippet code var string1 = ” 123 ”
var intvalue = 123
alert ( string1 + intvalue )
The result would be

Consider the following statements var text = "testing: 1, 2, 3"
// Sample text var pattern = /d+/ g // Matches all instances of one or more digits In order to check if the pattern matches with the string “text”, the statement is

Which is a more efficient code snippet ? Code 1 : for(var num = 10
num >= 1
num -- ) { document . writeln ( num )
} Code 2 : var num = 10
while( num >= 1 ) { document . writeln ( num )
num ++
}

Consider the following statements var count = 0
while ( count < 10 ) { console . log ( count )
count ++
} In the above code snippet, what happens?

Integer Variable is declared using following syntax in JavaScript.

Consider the following code snippet function printArray ( a ) { var len = a . length, i = 0
if ( len == 0 ) console . log (" Empty Array ")
else { do { console . log ( a [ i ])
} while ( ++ i < len )
} } What does the above code result?

Consider the following code snippet function tail ( o ) { for (
o . next
o = o . next )
return o
} Will the above code snippet work? If not, what will be the error?

Consider the following code snippet while ( a != 0 ) { if (spam>a == 1 ) continue
else a ++
} What will be the role of the continue keyword in the above code snippet?

Consider the following code snippet function f ( o ) { if ( o === undefined ) debugger
} What could be the task of the statement debugger?