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 Technology Questions

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Q:

What is difference between HTML and HTML5?

Answer

The differences between HTML and HTML5 are:


- Document of HTML is very large as compare to the HTML5.


- Audio and Video tags are not present in HTML whereas HTML5 contains audio and video tags.


- Vector technology is not integral part of HTML whereas HTML5 Vector technology is the integral part of it.


- HTML supported by all old browsers whereas HTML5 is supported by new browser.


- In HTML web sockets are not available whereas in HTML5 Full duplex communication channel is present.

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Subject: Web Technology

0 1798
Q:

What is database clusters?

Answer

Group of tables physically stored together because they share common columns and are often used together is called Cluster.

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Subject: Database Administration

1 1796
Q:

A database is used to

A) store data B) modify data
C) extract data D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

A database is used to store, modify, extract and to search for the data within it.

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

2 1794
Q:

How to insert Javascript in HTML?

Answer

We can insert JavaScript in HTML using <Script tag>. JavaScript can be enclosed in <script type = text/javascript> and ending with </script>.


Example: 


<html> 


  <body> 


        <script type="text/javascript"> 


               ...JavaScript….


         </script> 


   </body> 


</html>

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Subject: Web Technology

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Q:

Explain how to create users through SQL PLUS.

Answer

We need to first login to the data base as: SQLPLUS followed by user_name/password. Then we need to execute the following query:


CREATE USER user_name IDENTIFIED BY abcd; in this query a user_name suggest the user that is created which has a password abcd which is required for login in database.

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Subject: Oracle

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Q:

How do you traverse through a collection using its Iterator?

Answer

To use an iterator to traverse through the contents of a collection, follow these steps:


- Obtain an iterator to the start of the collection by calling the collections iterator() method.


- Set up a loop that makes a call to hasNext(). Have the loop iterate as long as hasNext() returns true.


- Within the loop, obtain each element by calling next().

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Subject: Java

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Q:

What are Native methods in Java?

Answer

Java applications can call code written in C, C++, or assembler. This is sometimes done for performance and sometimes to access the underlying host operating system or GUI API using the JNI.


 


The steps for doing that are:


First write the Java code and compile it


Then create a C header file


Create C stubs file


Write the C code


Create shared code library (or DLL)


Run application

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Subject: Java

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Q:

What are the Advantages of PL/SQL?

Answer

- Because of the block nature, multiple statements are processed at once thereby improving performance. 


- PL/SQL handles exceptions on catching which, action can be taken. 


- PL/SQL is highly portable as it works with all procedural languages and is highly secured because of privileges.


 

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Subject: Oracle

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