Development - Java Script Test

Test Instructions :

1. The Test is 1hr duration.
2. The Test Paper consists of 30 questions. The maximum marks are 30.
3. All the questions are multiple choice question type with three options for each question.
4. Out of the three options given for each question, only one option is the correct answer.
5. Each question is allotted 1 mark for each correct response.
6. 0.25 will be deducted for incorrect response of each question.
Start Test

   Time Left : 00 : 30    : 00

"++" is __________ type of operator.

  

  

  

  

-Infinity in JS gets added with +Infinity then output of the code will be.

  

  

  

Which of the following is not a compound assignment operator.

  

  

  

  

Which of the following is not a comparison operator ?

  

  

  

  

  

Which of the following is not an logical operator ?

  

  

  

  

In multiple line comment , End of the comment is specified by ________ Symbol.

  

  

  

  

Person XYZ wrote his name and date of code creation at the start , What kind of comment he has written ?

  

  

  

  

In JavaScript, _________ is an object of the target language data type that encloses an object of the source language.

  

  

  

  

JavaScript Statements are executed by ________ .

  

  

  

  

If the values on either side of '+' operator are numerical values then ___________.

  

  

  

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

  

  

  

  

Integer Variable is declared using following syntax in JavaScript.

  

Integer num;

 

  

var num;

 

  

int num;

 

  

integer num;

 

-Infinity in JS gets added with -Infinity then output of the code will be.

  

  

  

var str = "Str";
var num = 10;
var output = str + num;

What will be the value of Variable 'output' ?

  

  

  

  

What is mean by "this" keyword in javascript?

  

  

  

  

+Infinity in JS gets added with +Infinity then output of the code will be -

  

  

  

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++;
}

 

  

  

  

  

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

  

  

  

  

We can declare all type of variables in JavaScript with the keyword _____________.

  

  

  

  

During addition of two numbers , suppose one of the number is NaN then output of the following code will be ?

  

  

  

  

<html>
    <head>
        <title>A Simple Page</title>
        <script language="JavaScript">
            <!--
            var A = "Compile ",
                B = "Error";
            C = A + B;
            alert(C);
            //  -->
        </script>
    </head>
    <body></body>
</html>

What will be printed ?

  

  

  

<script type="text/javascript">
// document.write("<h1>Heading</h1>");
document.write("<p>Google</p>");
document.write("<p>Yahoo</p>");
</script>

Which of the statement will be neglected by Browser ?

  

<p>Google</p>

 

  

<p>Yahoo</p>

 

  

<h1>Heading</h1>

 

  

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

  

  

  

  

JavaScript is Case Sensitive !!Say True or False

  

  

To set up the window to capture all Click events, we use which of the following statement?

  

  

  

  

<html>
    <body>
        <script>
            var x = 12.45;
            var y = 1;
            var z = '8' + x + y;
            document.write(z + "<br>");
        </script>
    </body>
</html>

Value of Z is

  

  

  

  

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

  

  

  

  

What is the correct JavaScript syntax to write "Hello World"?

  

  

  

  

The syntax of a blur method in a button object is ______________

  

  

  

  

The syntax of capture events method for document object is ______________

  

  

  

  

In March 1996, _______________ was released, featuring support for JavaScript.

  

  

  

  

Is this correct syntax to include JS Code inside HTML Page ?

<script type="text/javascript">
...
</script>

 

  

  

Which of the following is the structure of an if statement?

  

  

  

  

The “var” and “function” are

  

  

  

  

A conditional expression is also called a

  

  

  

  

function message() {
    var name = "Pritesh";
    alert(name);
}

Variable declared above is example of ___________ Variable.

  

  

How does JavaScript store dates in a date object? 

  

  

  

  

Multiple Declarations of variables are separated by ___________ symbol

  

  

  

  

JavaScript Code is written inside file having extension __________.

  

  

  

  

To open a dialog box each time an error occurs, which of the following is added to prefs.js?

  

  

  

  

Microsoft Developed a compatible dialect of JavaScript called _____________.

  

  

  

  

"async" attribute is used to include External JS Code Asynchronously.

<script src="main.js" async="async"></script>

 

  

  

Consider the following statements

var count = 0;
while (count < 10) 
{
     console.log(count);
     count++;
}

In the above code snippet, what happens?

  

  

  

  

____________ is used to assign value to the variable.

  

  

  

  

Why so JavaScript and Java have similar name?

  

  

  

  

What is the correct syntax for referring to an external script called " abc.js"?

  

  

  

  

Java Script have following type of Comment(s) -

  

  

  

  

JavaScript contains a _________________ that assigns a value to a variable based on some condition.

  

  

  

  

Which of the following operator is used to concatenate two strings.

  

  

  

  

Comments in JS are ignored by ____________.

  

  

  

  

____________ is the tainted property of a window object.

  

  

  

  

var num;

Above Statement is called as __________ Statement.

  

  

  

  

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

  

  

JavaScript was invented at _______ Lab .

  

  

  

  

What are variables used for in JavaScript Programs?

  

  

  

  

Following JS Code Consists of different Type of Statements -

<script type="text/javascript">
    var i = 10;
    if (i < 10) {
        document.write("<h1>This is a heading</h1>");
        document.write("<p>This is a paragraph.</p>");
        document.write("<p>This is another paragraph.</p>");
    }
</script>

What are different Type of statements written inside above JS.

  

  

  

  

  

To automatically open the console when a JavaScript error occurs which of the following is added to prefs.js?

  

  

  

  

The development environment offers which standard construct for data validation

  

  

  

  

Which of the following function of String object causes a string to be italic, as if it were in an tag?

  

  

  

  

<script type="text/javascript">
x=4+"4";
document.write(x);
</script> 

What is the output.?

  

  

  

  

Which of the following function of Array object returns the last (greatest) index of an element within the array equal to the specified value, or -1 if none is found?

  

  

  

  

All modern browsers supports JS.

  

  

/* This is Simple Comment */

This is the example of ____________ Comment.

  

  

What type of value gets printed if we add following two variables.

var a = "1";
var b = 5;

 

  

  

  

  

Which JavaScript variable cannot be used as First character but can be use after first character ?

  

  

  

  

Comment Statement is _________________ type of statement.

  

  

  

  

The syntax of close method for document object is ______________

  

  

  

  

var num=20;

Above Statement is called as __________ Statement. Select all the appropriate options.

  

  

  

  

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

  

  

  

  

Local Variables are Destroyed as soon as ______________.

  

  

  

  

<html>
    <body>
        <script>
            var x = 5;
            var y = 6;
            document.write((x + y) + "<br>");
        </script>
    </body>
</html>

What will be the output of the following code ?

  

  

  

  

JavaScript code contain sequence of ___________.

  

  

  

  

What will be the output of the following script ?

<!DOCTYPE html>
<html>
    <body>
        <script>
            var x = 5;
            document.write(x === "5");
        </script>
    </body>
</html>

 

  

  

  

  

We cannot Place JS Code in the body tag . Say true/false.

  

  

Variable declared outside JavaScript Function is called as _______________ .

  

  

JavaScript is ideal to

  

  

  

  

When a JavaScript object is sent to Java, the runtime engine creates a Java wrapper of type ___________

  

  

  

  

_____ JavaScript statements embedded in an HTML page can respond to user events such as mouse-clicks, form input, and page navigation.

  

  

  

  

______method evaluates a string of JavaScript code in the context of the specified object.

  

  

  

  

Why JavaScript is called as Lightweight Programming Language ?

  

  

  

  

Which was the first browser to support JavaScript ?

  

  

  

  

Which of the following is not considered a JavaScript operator?

  

new

 

  

this

 

  

delete

 

  

typeof

 

Guess the ternary operator used in the following example !!!

marks = (mark<35)?"Fail":"Pass";

 

  

  

  

  

Variable declared without a value will have the value ______________.Eg.

var num;

 

  

  

  

undefined

 

  

Executable single line of Script is called as _________________.

  

  

  

  

If para1 is the DOM object for a paragraph, what is the correct syntax to change the text within the paragraph?

  

  

  

  

Scripting language are

  

  

  

When an empty statement is encountered, a JavaScript interpreter

  

  

  

  

<!DOCTYPE html>
<html>
    <body>
        <script>
            var x = "5";
            var y = 6;
            var z = x + y;
            document.write(x + "<br>");
            document.write(y + "<br>");
            document.write(z + "<br>");
        </script>
    </body>
</html>

Guess output of the following code.

  

  

  

  

var var1 = "Pritesh";

Above variable can store value of type.

  

  

  

  

How to create a Date object in JavaScript?

  

  

  

  

Multiple JS statements are written inside pair of ________ to form a statement block.

  

  

  

  

JavaScript Code can be called by using _________.

  

  

  

  

JavaScript is ______ Side Scripting Language.

  

  

  

  

<html>
<body>
<script type="text/javascript">
<!--
document.print("Hello");
//-->
</script>
</body>
</html>

What will be the Output of the above Code ?

  

  

  

  

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

  

  

  

  

Is it necessary to use "var" keyword while declaring variable.

  

  

Non Initialized Variable have value "undefine", What value be printed in following case.

var carname="Volvo"; 
var carname;

 

  

  

  

  

______ attribute is used to specify the character encoding used in an external script file.

  

  

  

  

Conditional Operator shown in the following example is _____________.

marks = (mark<35)?"Fail":"Pass";

 

  

  

  

  

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