Technology Questions

Q:

Why synchronization?

Answer

When ever two or more threads are sharing same data for updating then unpredicted result will be there in the data.


For Example take a thread is depositing amount in Account Object and another thread is withdrawing amount from the same Account Object.


when ever both threads are executed simultaneously then unexpected result is stored in the balance of the  Account Object. 

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Subject: Java

0 2403
Q:

How can record locking be achieved in those DB2 versions which do not support it?

Answer

It can be done by setting the record length’s size to more than half of the page’s size.

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Q:

I do not want my class to be inherited by any other class. What should i do?

Answer You should declared your class as final. But you can't define your class as final, if it is an abstract class. A class declared as final can't be extended by any other class.
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Subject: Java

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Q:

why protected modifier?

Answer

Outside the package if any other class other than JVM calls the finalize method our class then it is not allowed

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Subject: Java

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Q:

What are the main advantages and disadvantages of Fiber-Optic-based networks?

Answer

Advantages      : More efficient and quality of service is better.


Dis advantages: Expensive, complicated

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Q:

Difference between transparent tables and pooled tables

Answer

Transparent tables: Transparent tables in the dictionary has a one-to-one relation with the table in database. Its structure corresponds to single database field. Table in the database has the same name as in the dictionary. Transparent table holds application data.



Pooled tables: Pooled tables in the dictionary has a many-to-one relation with the table in database. Table in the database has the different name as in the dictionary. Pooled table are stored in table pool at the database level.

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Subject: ABAP

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Q:

Are objects passed by value or by reference?

Answer Everything is passed by value.
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Subject: PHP

0 2391
Q:

What is DCLGEN?

Answer

DeCLarations GENerator : used to create the host language copy books for the table    definitions. Also creates the DECLARE table.

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