Technology Questions

Q:

Explain the concept of states in ASP.NET.

Answer

State is quite an innovative concept in Web development because it eliminates the drawback of losing state data due to reloading of a Web page. By using states in a Web application, you can preserve the state of the application either at the server or client end. The state of a Web application helps you to store the runtime changes that have been made to the Web application. For example, as already described earlier, a change in the data source of the Web application might be initiated by a user when he/she selects and saves some products in the shopping cart.

If you are not using states, these changes are discarded and are not saved. You may think that the whole concept of storing states is optional. However, under certain circumstances, using states with applications is imperative. For example, it is necessary to store states for Web applications, such as an e-commerce shopping site or an Intranet site of a company, to keep track of the requests of the users for the items they have selected on the shopping site or the days requested for vacation on the Intranet site.

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Subject: .NET

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Q:

What are the CICS commands available for program control?

Answer

The following commands are available for the Program Control services:


LINK: To pass control to another program at the lower level, expecting to be returned. XCTL: To pass control to another program at the same level, not expecting to be returned.


RETURN:  To return to the next higher-level program or CICS. 


LOAD: To load a program. 


RELEASE: To release a program.

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Q:

What is difference between methods and blocks?

Answer

Method contains name, parameters, return type and executable body. But block does not contains name, parameters, return type.It contains only executable body.


Methods are executed by method call statements. Blocks are executed automatically with class loading and with object creation.

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Subject: Java

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Q:

What is the difference between a constructor and a method?

Answer

A constructor is a member function of a class that is used to create objects of that class. It has the same name as the class itself, has no return type, and is invoked using the new operator. We cannot invoke a constructor directly.


 


A method is an ordinary member function of a class. It has its own name, a return type (which may be void), and is invoked using the dot operator.

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Subject: Java

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Q:

What are the core BI tools that professionals work with? Which ones have you used?

Answer

SSIS, SSAS and SSRS are the most important reporting systems that BI professionals work with. On a detailed level, I have worked with data mining, master data management, data profiling and data cleansing and analysis.

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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).

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Subject: Web Technology

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Q:

What is DCLGEN?

Answer

DeCLarations GENerator : used to create the host language copy books for the table    definitions. Also creates the DECLARE table.

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Q:

What is an Index? Explain how to create an Index.

Answer

An index is a object which is used to improve performance during retrieval of records.


CREATE [UNIQUE] INDEX index_name 


ON employee[emp_id, emp_name,dept_id]


[COMPUTE STATISTICS]


The UNIQUE keyword is used when combined values of the index should be unique.


The COMPUTE STATISTICS during the creation of index optimizes the plan of execution of the SQL statement and improves performance.

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Subject: Oracle

0 2354