0
Q:

What is the difference between path and classpath? 

Answer:



Q:

Which of these class have only one field 'TYPE' ?

A) Run time B) Process
C) Void D) System
 
Answer & Explanation Answer: C) Void

Explanation:

The Void class has one field, TYPE, which holds a reference to the Class object for the type void.

Report Error

View Answer Workspace Report Error Discuss

Filed Under: Java - Technology
Job Role: Analyst , IT Trainer

4 30
Q:

 What is the string contained in s after following lines of code?

StringBuffer s = new StringBuffer(“Hello”); s.deleteCharAt(0);  ?

A) llo B) Hllo
C) ello D) H
 
Answer & Explanation Answer: C) ello

Explanation:

deleteCharAt() method deletes the character at the specified index location and returns the resulting StringBuffer object.

So after deleting the character at 0 ie 'H', the string returns 'ello' as the output.

Report Error

View Answer Workspace Report Error Discuss

Filed Under: Java - Technology
Job Role: Analyst , IT Trainer

2 17
Q:

Which of the following are incorrect form of StringBuffer class constructor  ?

A) StringBuffer(int size , String str) B) StringBuffer(int size)
C) StringBuffer(String str) D) StringBuffer()
 
Answer & Explanation Answer: A) StringBuffer(int size , String str)

Explanation:
Report Error

View Answer Workspace Report Error Discuss

Filed Under: Java - Technology
Job Role: Database Administration , IT Trainer

1 45
Q:

Does not overriding hashcode() method has any performance implication ?

Answer

A poor Hashcode() function will result in frequent collision in HashMap which eventually increase time for adding an object into Hash Map.

Report Error

View answer Workspace Report Error Discuss

Subject: Java - Technology
Job Role: Analyst , IT Trainer

1 39
Q:

How do you handle error condition while writing stored procedure or accessing stored procedure from java ?

Answer

Stored procedure should return error code if some operation fails but if stored procedure itself fail than catching SQLException is only choice.

Report Error

View answer Workspace Report Error Discuss

Subject: Java - Technology

1 41