Technology Questions

Q:

What is meant by index cardinality?

Answer

The number of distinct values for a column is called index cardinality. DB2's RUNSTATS utility analyzes column value redundancy to determine whether to use a tablespace or index scan to search for data.

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Q:

Can I call an XLM macro from within Excel VB?

Answer

With the help of Excel App instance. we can execute a Macro in VB code.


EXcelAppInstance.Application.Run("MacroName")

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Q:

What is a .htacces file

Answer

 .htaccess is a configuration file running on Apache server.These .htaccess file used to change the functionality and features of apache web  server .

 e.g   .htaccess file used for url rewrite .

         .htaccess file used to make the site password protected.

         .htaccess file can restrict  some ip addresses ,so that on restricted ip adresses  site will not open.

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Subject: PHP

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Q:

What is the difference between the functions unlink and unset?

Answer

unlink()-deletes the given file from the file system.
unset() -makes a variable undefined.

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Subject: PHP

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Q:

Where can you define the icon for your Activity ?

Answer

Icon for an Activity is defined in the manifest file.


Code


<activity android:icon="@drawable/app_icon" android:name=".MyTestActivity"></activity>


...

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Q:

What is an Interactive Report?

Answer

An Interactive report allows the user to participate in retrieving and present data at each level.while classical report doesn't have access to interact.

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Subject: SAP

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Q:

What is the functionality of md5 function in PHP?

Answer

Calculate the md5 hash of a string. The hash is a 32-character hexadecimal number. I use it to generate keys which I use to identify users etc. If I add random no techniques to it the md5 generated now will be totally different for the same string I am using.

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Subject: PHP

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Q:

How to use SimpleDB with Amazon?

Answer

Every architecture rely on a database that is easy to maintain and gets easily configured Amazon uses the database by the name SimpleDB. This is the database that is used for cloud architecture to track the statuses of the components. The component of the system are asynchronous and discrete, it requires capturing the state of the system so that in any failure the user can easily revert back to its normal configuration. SimpleDB is schema-less database and there is no need to define the structure before the creation of any data. Every controller in the database defines their own structure and link the data to a job.

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Subject: Cloud Computing

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