Interview Questions

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PATH and CLASSPATH are operating system level environment variables. PATH is used to define where the system can find the executables (.exe) files whereas CLASSPATH is used to specify the location of .class files.

Define new VSAM dataset allocated with more space.

Use IDCAMS to REPRO the old VSAM file to new VSAM dataset.

Use IDCAMS to ALTER / RENAME the old VSAM dataset to DELETE the old VSAM datset.

Use IDCAMS to ALTER / RENAME the new VSAM dataset to the name of the original VSAM dataset.

SELECT SERVERPROPERTY ('productversion'), SERVERPROPERTY ('productlevel') and SERVERPROPERTY ('edition').

The Apache configuration file is called httpd.conf.

Following are the steps to create a simple AD rotator script without using database in PHP:

- All the ad’s can be collected in one place and be displayed randomly.rand() function can be used for this purpose.

- In order to NOT use any database, a flat file can be used to store the ad’s.

- In order to store the Ad’s information (HTML code), a flat file say “ad.txt” can be created.

- The random number can be stored in a variable 

$result_random=rand(1, 100);

- Conditions can be checked to display the ad’s.

if($result_random<=70)

{

      echo "Display ad1";

}

A function prototype is a declaration of a function that omits the function body. It specifies the function’s name, argument types and return type.

E.g. int add(int,int)

Higher Quality Scores typically result in lower costs and better ad positions. Quality Score is Google's rating of the quality and relevance of both your keywords and PPC ads. It is used to determine your cost per click (CPC) and multiplied by your maximum bid to determine your ad rank in the ad auction process.