Technology Questions

Q:

Which standard govern parallel communications?

A) CAT 5 B) RS232
C) RS-232a D) IEEE 1284
 
Answer & Explanation Answer: D) IEEE 1284

Explanation:
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Q:

Differentiate linked list from arrays.

Answer

Arrays can store data in a fix allotted space. The use of linked list allows more flexibility because space is dynamically allocated as needed.

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Q:

What are the the different ways for creating a thread?

Answer

A thread can be created by subclassing Thread, or by implementing the Runnable interface.

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Subject: Java

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Q:

What are the basic SQL*Plus commands?

Answer

1) START- Used to run a SQL script.
2) ACCEPT- Accepts input from user.
3) GET- Gets the sql file from user to place in buffer.
4) LIST- Displays the last command executed.
5) RUN- Used to list and run the command in buffer
6) SHOW- Shows the environment settings. Example: SHOW PAGESIZE

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Subject: Oracle

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Q:

What are the problems in processing batch input sessions and How is batch input process different from processing online ?

Answer

PROBLEMS:


i) If the user forgets to opt for keep session then the session will be automatically removed from the session queue(log remains). However if session is processed we may delete it manually.


ii)if session processing fails data will not be transferred to SAP database table.

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Subject: SAP

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Q:

What is the Dictionary class?

Answer

- The Dictionary class is an abstract class.


- Classes like Hashtable which map keys to values inherit from this class. 


- An object can be looked for if a dictionary and a key is provided.


- Any non-null object can be used as a key and as a value.

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Subject: Java

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Q:

What is the relationship between SOA and cloud architecture?

Answer

Service oriented architecture (SOA) is an architectural style that supports service oriented methodology that is being added in the cloud architecture as a mandatory component. Cloud architecture support the use of on-demand access to resources and it provides lots of other facilities that are being found in SOA as well. SOA makes these requirements optional to use. But, to get the full functionality and more performance based efficiency there is a requirement for the mixture of SOA and cloud architecture.

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Subject: Cloud Computing

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Q:

What is the difference between array and ArrayList ?

Answer

Array is collection of same data type. Array size is fixed, It cannot be expanded.


 


But ArrayList is a growable collection of objects.ArrayList is a part of Collections Framework and can work with only objects.

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Subject: Java

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