Interview Questions

Q:

Explain the difference between data mining and data warehousing.

Answer

Data mining is a method for comparing large amounts of data for the purpose of finding patterns. Data mining is normally used for models and forecasting. Data mining is the process of correlations, patterns by shifting through large data repositories using pattern recognition techniques.


Data warehousing is the central repository for the data of several business systems in an enterprise. Data from various resources extracted and organized in the data warehouse selectively for analysis and accessibility.

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Q:

What is an explicit constructor?

Answer

A conversion constructor declared with the explicit keyword. The compiler does not use an explicit constructor to implement an implied conversion of types. It’s purpose is reserved explicitly for construction

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Subject: C++
Job Role: Software Architect

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Q:

What is the purpose of UIWindow object?

Answer

The presentation of one or more views on a screen is coordinated by UIWindow object..

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Subject: IOS

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Q:

Explain i) Rename ii) Alias.

Answer

- Rename : It is a permanent name provided to a table or column.
- Alias : It is a temporary name provided to a table or column which gets over after the execution of SQL statement.

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Subject: Oracle

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Q:

What is a AngularJS?

Answer

AngularJS is a framework to build the large scale and high performance web application while keeping them as easy-to-maintain. These are the features of AngularJS framework.


AngularJS is a powerful Script based on JavaScript development framework to Implement RICH Internet Application (RIA).


AngularJS is a developers options to write client side application (using JavaScript) in a clean MVC (Model View Controller) side.


Application are written in AngularJS is also cross-browser compliant. AngularJS automatically handles JavaScript code suitable for any browser.


AngularJS is an open source, completely free, and used by large number of developers around the world. It is licensed under the Apache License version 2.0.

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Subject: Web Technology
Job Role: Software Architect

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Q:

What is the fastest type of JDBC driver ?

Answer

Type 4  (JDBC Net pure Java Driver) is the fastest JDBC driver.  Type 1 and Type 3 drivers will be slower than Type 2 drivers (the database calls are make at least three translations versus two), and Type 4 drivers are the fastest (only one translation).

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Subject: Java

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Q:

For printing out strings, there are echo, print and printf. Explain the differences.

Answer - echo is the most primitive of them, and just outputs the contents following the construct to the screen. print is also a construct (so parentheses are optional when calling it), but it returns TRUE on successful output and FALSE if it was unable to print out the string. However, you can pass multiple parameters to echo, like:

and it will output the string "Welcome to TechInterviews!" print does not take multiple parameters. It is also generally argued that echo is faster, but usually the speed advantage is negligible, and might not be there for future versions of PHP. printf is a function, not a construct, and allows such advantages as formatted output, but it’s the slowest way to print out data out of echo, print and printf.
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Subject: PHP

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Q:

Why Haven't you received any offers so far?

Answer

You're just as choosy about finding the right job as the interviewer is about hiring the right candidate. Don't whine or show that the search is upsetting you. If you've already fielded an offer or two,you might say


        " I have had an offer.But the situatioin was not right for me. I'm especially glad that I didn't accept, because I now have a shot at landing this position."


It's important to tell the truth, however, because the interviewer's next logical questions may be the following:


who made you an offer? For what type of position? At what salary?


If you've already lied, you're in hot water now! some interviewers will consider any admission of lying in these circumstances your "voluntary" offer to end the interview!


Many interviewers know a great deal about their competitors and which positions they're trying to fill. If you did the smart thing and told the truth, feel free to name the company.


It's important to stress that the position you turned down was very similar to the one you're applying for now. After all, if the job you are currently interviewing for is perfect for you-as you've undoubtedly already told the interviewer three or four times - why would be at all interested in something very different at the other company? 

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Subject: Salary Related

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