Interview Questions

Q:

What is the advantage of using frames?

Answer

- Frames make it easier to navigate through a site. 


- The links that appear in the frame can appear through out the site.

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Subject: Web Technology

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Q:

What is the difference between a Windows server operating system and a workstation version?

Answer

The server version of a Windows operating system is designed to provide more optimized networking services over a network. It can manage domains better and it includes more security feature and data backup support. Workstation versions act merely as clients and therefore do not need to have as much resources when compared to the server versions.

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Q:

What is the difference between throw and throws clause?

Answer

A throw is used to throw an exception manually, where as throws is used in the case of checked exceptions, to tell the compiler that we haven't  handled the exception, so that the exception will be handled by the calling function.

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Subject: Java

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Q:

What is Broadcast ?

Answer

To send data/info to all of the members of the network..( simple 176.16.255.255 for class B network)

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Q:

How E-commerce works?

Answer

=> When a consumer wants to buy a certain product, he go to the website and selects the product he wants to buy. 


=> Once the product is selected, the consumer transaction is moved to the online transaction server where he places an order. 


=> The informations is exchanged over a secure channel through a private gateway to a processing network. 


=> The networked banks accept or reject the transaction.


 All this happens in just a matter of seconds. E-commerce is a very secure due to the SSL (Secure Socket Layer) technology.

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Subject: Web Technology

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Q:

Explain Not Null constraint.

Answer

Oracle NOT NULL is used on a column to ensure that the value for that column can never be NULL.
Example:
Below, the constraint is that the id should never be NULL. If it is, oracle throws an error.
create table employee ( id number NOT NULL, Name varchar(200) );

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Subject: Oracle

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Q:

What are the principles in providing the security for the computer programs?

Answer

- The principle of least privilege is used to provide more security to the computer programs. 


- The principle allows the designing of the program such that any unauthorized access is not allowed and only the person who owns the program will be able to access it. 


- The services provided should be able to access only those products that need the services. 


- Web servers that are involved in responding the queries of the web users provide only accessing to the HTML files that will serve the purpose of the programs. 


- Computer programs should be made such that it provides secure features of logging into the program with proper authentication.

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Subject: Web Technology

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Q:

What is the difference between method overriding and overloading?

Answer

Overriding is a method with the same name and arguments as in a parent, whereas overloading is the same method name but different arguments

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Subject: Java

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