US Search

Q:

What is Javascript namespacing? How and where is it used?

Answer

Using global variables in Javascript is evil and a bad practice. That being said, namespacing is used to bundle up all your functionality using a unique name. In JavaScript, a namespace is really just an object that you’ve attached all further methods, properties and objects. It promotes modularity and code reuse in the application.

Workspace

Report Error

View answer Workspace Report Error Discuss

Subject: Web Technology

Q:

How to determine the state of a checkbox using Javascript?

Answer

var checkedP = window.document.getElementById("myCheckBox").checked;

Workspace

Report Error

View answer Workspace Report Error Discuss

Subject: Web Technology

Q:

How to get the contents of an input box using Javascript?

Answer

Use the "value" property.
var myValue = window.document.getElementById("MyTextBox").value;

Workspace

Report Error

View answer Workspace Report Error Discuss

Subject: Web Technology

Q:

How to read and write a file using javascript?

Answer

I/O operations like reading or writing a file is not possible with client-side javascript. However , this can be done by coding a Java applet that reads files for the script.

Workspace

Report Error

View answer Workspace Report Error Discuss

Subject: Web Technology

Q:

How do you submit a form using Javascript?

Answer

Use document.forms[0].submit();

(0 refers to the index of the form – if you have more than one form in a page, then the first one has the index 0, second has index 1 and so on).

Workspace

Report Error

View answer Workspace Report Error Discuss

Subject: Web Technology

Q:

Which keyword is used to declare the min and max functions?

A) iostream	B) string
C) algorithm	D) None of these

Answer & Explanation Answer: C) algorithm

Explanation:

Algorithm header file contain the supporting files needed for the execution of these functions.

Report Error

View Answer Report Error Discuss

Filed Under: C++

Q:

Why is it expensive to use objects for exception?

A) Exception object is created only if an error actually happens	B) Because of execution time
C) Memory space involved in creating an exception object	D) None of the mentioned

Answer & Explanation Answer: A) Exception object is created only if an error actually happens

Explanation:

If an error occurs in program, then only exception object is created otherwise, It will not be created. So it’s expensive to use in the program.

Report Error

View Answer Report Error Discuss

Filed Under: C++

Q:

Which operator is used in catch-all handler?

A) ellipses operator	B) ternary operator
C) string operator	D) unary operator

Searching for "US"

Quick Links