Interview Questions

Q:

What are different file OPEN modes available in COBOL?

Answer

Open for INPUT, OUTPUT, I-O, EXTEND.


1.INPUT : for read only purpose


2.OUTPUT : for write only purpose


3.EXTEND : for appending records


4.I-O : for read and write(using EXTEND) purpose

Report Error

View answer Workspace Report Error Discuss

0 3809
Q:

What is FBT (Fringe Benefit Tax)?

Answer

The tax payable on a non-salary benefit provided to an employee or an associate of the employee. The employer is liable to pay any FBT and may choose to recover the FBT amount from the employee.

Report Error

View answer Workspace Report Error Discuss

Subject: Accounts Payable

3 3791
Q:

State one similarity and difference between WHERE Clause and HAVING Clause?

Answer

Similarity: Both WHERE and HAVING Clause filters out records based on one or more conditions.


Difference: WHERE Clause can only be applied to a static non-aggregated column whereas HAVING is needed for aggregated columns.

Report Error

View answer Workspace Report Error Discuss

Subject: SQL

1 3786
Q:

Why static methods cannot access non static variables or methods?

Answer

A static method cannot access non static variables or methods because static methods doesnt need the object to be accessed. So if a static method has non static variables or non static methods which has instantiated variables they will no be intialized since the object is not created and this could result in an error.

Report Error

View answer Workspace Report Error Discuss

Subject: Java

9 3773
Q:

What is a DB2 bind?

Answer

A DB2 bind is a process that builds an access path to DB2 tables. 

Report Error

View answer Workspace Report Error Discuss

0 3771
Q:

What is Stop-and-Wait Protocol?

Answer

In Stop and wait protocol, sender sends one frame, waits until it receives confirmation from the receiver (okay to go ahead), and then sends the next frame.


 

Report Error

View answer Workspace Report Error Discuss

0 3765
Q:

What is WATER MARK in oracle? Explain the significance of High water mark.

Answer

WATER MARK is a divided segment of used and free blocks. Blocks which are below high WATER MARK i.e. used blocks, have at least once contained some data. This data might have been deleted later. Oracle knows that blocks beyond high WATER MARK don’t have data; it only reads blocks up to the high WATER MARK during a full table scan. 

Report Error

View answer Workspace Report Error Discuss

Subject: Oracle

3 3765
Q:

What is a Wrapper class?

Answer

Wrapper classes wrap primitive values in a class and offers utility to access them through objects. Some of the primitive wrapper data types are:


Byte, short, int, long, float, double, char, Boolean.


Example: 


Create a class name VectorAdd to populate it with integer values using the add(int, object) method.


public class VectorAdd


{


       public static void main(String argv[])


       {


             Vector v = new Vector();


             v.add(0,new Integer(10));


             v.add(1,new Integer(20));


             v.add(2,new Integer(30));


             for(int i=0; i < v.size();i ++)


             {


                  Integer iw =(Integer) v.get(i);


                  System.out.println(iw);


             }


       }


}

Report Error

View answer Workspace Report Error Discuss

Subject: C++

0 3761