Interview Questions

Q:

What is stored in the 'this' reference?

Answer

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'.

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Subject: Java
Job Role: Analyst

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Q:

What is the use of IP based hosting?

Answer

The web hosting on the server can be accomplished by using the IP based hosting that provides resources and services as follows:


- IP based hosting provides dedicated IPs that consists of virtual hosts and having the different IP address. 


- Web server is configured with different and multiple physical network interfaces using the same physical interface. 


- Web server uses this IP address to connect the client with the server to determine the web site that provides the client a view of it. 


- IP addresses provide the resources that are required in order to use the SSL certificates and other resources rather than shared certificate.

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Subject: Web Technology

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Q:

How to Add a new column to an existing table?

Answer

New column can be added using the ALTER TABLE command as shown below:
Example:
ALTER TABLE employee ADD DateOfBirth date

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Subject: Oracle

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Q:

Describe Android Application Architecture.

Answer

Android Application Architecture has the following components:


> Services - like Network Operation


> Intent - To perform inter-communication between activities or services


> Resource Externalization - such as strings and graphics


> Notification signaling users - light, sound, icon, notification, dialog etc.


> Content Providers - They share data between applications

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Q:

What is JAR file? what are the main uses of JAR files?

Answer

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.

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Subject: Java

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Q:

What is the use of Name based hosting?

Answer

- Name based is the virtual hosting that allows the virtual hosts to serve multiple hostnames that runs on single machine and having only one IP address.


- This is used when the web browser is used to request the resource from the server then the server respond using the hostname. 


- Web server uses HTTP protocol to respond to the requested hostname as the part of the request. 


- The server contains all the information of the website and the user that requests for the resources given. 


- Name based web hosting includes the resources and services that need to be given at the time of client’s request.

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Subject: Web Technology

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Q:

In a class if private data member is declared then how to set data to that private data member?

Answer

By using method.


The method used to set the data is called setter method.

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Subject: Java

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Q:

What is the differences between structure and table in data dictionary in ABAP?

Answer

Structure and table both are 2/2 matrices but there are many differences between table and structure.

1. Table can store the data physically but a structure dose not store.
2. Table can have primary key but a structure dose not have.
3. Table can have the technical attribute but a structure dose not have.

structure doesn't contain technical attributes.
structure doesn't contain primary key.
structure doesn't stores underline database level.

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Subject: ABAP

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