Technology Questions

Q:

Explain how to create random passwords.

Answer

Generating random passwords in PHP can be done in multiple ways depending on how much security the application demands:-


Md5 function can be passed one parameter as uniqid() function which in turn generates a random number. Passing the parameter as TRUE in uniqid() adds additional uniqueness.


<?php
   $passwd = md5(uniqid(rand(), true));
   Echo $passwd;
?>

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Subject: PHP

0 2805
Q:

What is MIME?

Answer

MIME - Multi-purpose Internet Mail Extensions. 


MIME types represents a standard way of classifying file types over Internet. 


Web servers and browsers have a list of MIME types, which facilitates files transfer of the same type in the same way, irrespective of operating system they are working in.


A MIME type has two parts: a type and a subtype. They are separated by a slash (/). 


MIME type for Microsoft Word files is application and the subtype is msword, i.e. application/msword.

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Subject: PHP

0 2803
Q:

What are the factors that are addressed to integrate data?

Answer

Following are the data integration factors:


- Sub set of the available data should be optimal. 


- Noise/distortion estimation levels because of sensory/processing conditions at the time of data collection.


- Accuracy, spatial and spectral resolution of data.


- Data formats, storage and retrieval mechanisms.


- Efficiency of computation for integrating data sets to reach the goals.

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Q:

How to open a file?

Answer

<?php
$file = fopen("file.txt","r");
?>

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Subject: PHP

0 2798
Q:

What strategies are available for backing-up an Oracle database?

Answer

The backup strategies that are provided by Oracle are as follows:


- Logical backup using Exports and import.


- Physical file system backup


- RMAN Recovery Manger which is also known as incremental files system backup.

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Subject: Oracle

0 2795
Q:

Which among the following are the capabilities of the Cursor?

A) It reads every row one by one. B) It can be parameterised and hence are flexible
C) It can be positioned to specific rows D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:

All the above listed actions are the functions of cursor

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3 2788
Q:

What are the differences between COBOL and COBOL II?

Answer

There are some differences:


COBOL II supports structured programming by using in line Performs and explicit scope terminators. It introduces new features (EVALUATE, SET. TO TRUE, CALL BY CONTEXT, etc). It permits programs to be loaded and addressed above the 16-megabyte line .  It does not support many old features (READY TRACE, REPORT-WRITER, ISAM, etc.). It offers enhanced CICS support.

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0 2783
Q:

what is flat aggregation?

Answer

If you create an Aggregate with more than 16 characteristics, then we call that aggregate as FLAT Aggregate. When an aggregate is active then new data is not available for reporting,These aggregates are called Flat Aggregates.

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