Interview Questions

JAR files are java's version of ZIP files. In fact, JAR uses the ZIP file format.

uses:

- to compress a number of . class files into one file

- to make a java executable JAR file.

This is a keyword and used as reference to Current object address in java. 

It means by using which object the method is called that object hashcode is stored inside the 'this'.

With HTML5, it is possible for the web pages to store the data locally in the user's browser. This web storage is much faster and secured than the cookies. Also, a larger amount of data can be stored without causing any adverse effect to the performance of the website. 

The data here is not included with every server request. It is used ONLY when it is asked for. It is only that particular web page that can access the data stored by itself.

JavaScripts uses a hierarchical structure that applies to the objects in a document. There are some objects that show the relationship of one object to another using the language.

Window object: This is the topmost object in the hierarchy. It represent the content area of browser window that consists of HTML documents. Each frame is also a window that has some actions inside it.

Document object: This object gets loaded in a window and consists of objects of different kind in the model. It consists of the content that will be written in the script.

Form object: Form objects are used for more interaction with the users. It represents the form elements inside <FORM>...</FORM> tag.

new ClassName();

This expression creates object in heap area and returns that obj address. Here JVM creates object but JVM does not returns object original address. JVM returns duplicate address, duplicate address is also called as hashcode. 

SVG stands for scalable vector graphics. It’s a text based graphic language which draws images using text, lines, dots etc. This makes it lightweight and renders faster.

Microsoft security patches are intended to solve certain security loopholes and problems, while at the same time upgrading any existing security features. This would provide better protection by reducing vulnerabilities in security.

The main reason why the scope resolution operator (::) cannot be overloaded is that only operators that take in values as parameters can be overloaded. The scope resolution operator does not take a value as parameter.