Technology Questions

Q:

Which of the following statements is true concerning subqueries?

A) Does not start with the word SELECT. B) Involves the use of an inner and outer query.
C) Cannot return the same result as a query that is not a subquery. D) All of the above
 
Answer & Explanation Answer: B) Involves the use of an inner and outer query.

Explanation:
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Filed Under: SQL
Job Role: Analyst , Database Administration , IT Trainer

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Q:

What is SVG?

Answer

- SVG is the abbreviation for Scalable Vector Graphics and is recommended by W3C. 


- It is used to define vector-based graphics for the Web


- The graphics are defined in XML format


-An important quality of SVG graphics is that their quality is maintained even when they are zoomed or resized. 


- All the element and attributes of SVG files can be animated

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Subject: Web Technology

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Q:

what is non-static member class?

Answer

Non-static member class is a class defined inside outer class with out static modifier.


EX:


class A { // top level class or outer class


    ......


    class B { //non-static member class


    }


    .....


}

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Subject: Java

0 1864
Q:

How does traffic measured in hosting platform?

Answer

- The traffic can be measured using the size of the files that are transferred from one place to another (server-client). 


- It can also be measured by the size of the file that is being requested by the client from the server. 


- The number of visitors arriving on the website also involve in the measurement of the traffic using the web hosting platform. 


- The advertisements of the sites take more bandwidth to allow more number of users to be on the website. 


- More number of users provides higher traffic on the website thus it requires more bandwidth on the web hosting sites.

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Subject: Web Technology

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Q:

What are meta tags used for?

Answer

-To store information usually relevant to browsers and search engines.


-To only store information usually relevant to browsers


-To only store information about search engines.


-To store information about external links

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Q:

What is the difference between start_form and open_form in scripts? Why is it necessary to close a form always once it is opened?

Answer

strat_form using this we can open many layoutses
open_form using this we can open the layout
performance will be high

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Subject: ABAP

0 1862
Q:

Which of the following topologies has the highest reliability?

A) Mesh B) Ring
C) Bus D) Star
 
Answer & Explanation Answer: A) Mesh

Explanation:

In the mesh topology, each computer is connected to the other with a separate physical link in a network. It is most reliable topology as the network does not get down in case one of the nodes is failed.

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1 1862
Q:

How can we read and write operating system files from PL/SQL program?

Answer

The UTL_FILE database package can be used to read and write operating system files. You need to have read /write access rights in that directory before the package can be used.


Example to write file:


Fhandler is a variable of type UTL_FILE.FILE_TYPE


UTL_FILE.PUTF(fHandler, 'Im writing to a file\n');


 


Example to read file:


UTL_FILE.GET_LINE(fHandler, buf);

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Subject: Oracle

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