Technology Questions

Q:

Explain 5-4-3 rule

Answer

In a Ethernet network, between any two points on the network, there can be no more than five network segments or four repeaters, and of those five segments only three of segments can be populated.

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Q:

What is the purpose of garbage collection in Java, and when is it used ?

Answer

The purpose of garbage collection is to identify and discard those objects that are no longer needed by the application, in order for the resources to be reclaimed and reused.


 

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Subject: Java

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Q:

How to define a constant variable in Java?

Answer The variable should be declared as static and final. So only one copy of the variable exists for all instances of the class and the value can't be changed also.
static final int PI = 2.14; is an example for constant.
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Subject: Java

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Q:

What is sqlcode -811?

Answer

SELECT statement has resulted in retrieval of more than one row.

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Q:

If an array with name as "names" contain three elements, then how will you print the third element of this array?

Answer

Print third array element document.write(names[2]);

Note:- Array index starts with 0.

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Subject: Web Technology

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Q:

What do you mean by stack unwinding?

Answer

Stack unwinding is a process of calling all destructors for all automatic objects constructed at run time when an exception is thrown. Destructors are called between the places where the exception was thrown and where it is caught.

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Subject: C++

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Q:

What are the important topologies for networks?

Answer

BUS topology:


In this each computer is directly connected to primary network cable in a single line.


 


STAR topology:


In this all computers are connected using a central hub.

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Q:

HTML documents are saved in

A) Machine language codes B) ASCII text
C) Special binary format D) None of the above
 
Answer & Explanation Answer: B) ASCII text

Explanation:

Word and WordPad can save documents as ASCII text and HTML, but this approach can lead to problems. NotePad should launch with a new document open.

From the File pull-down menu, Select "Save As," save the file to the Desktop, and name the file using the ".html" extension (e.g., "home.html").

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