| Other Core Java Interview Questions |
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| Question | Asked @ | Answers |
| |
| what is the purpose of method overriding in java where v r
completely re-defining a inherited method instead y can't v
create a new method and define.If the question is very silly
plz excuse me and do reply.Thank U! | | 5 |
| steps to connect with Oracle Databse using TYPE-2 Jdbc driver. | | 1 |
| In the first round, there are 30 aptitude and 30 java
questions. We are suppose to finish both the papers within
60 minutes.
I cleared this round.
Next was test for programming skills.
In this section, Some 7 n's were asked.
1.
What is the difference b/w sleep(1000) and wait(1000)
2.
what is the diff b/w static block and static function?
3.
Write a program to validate IP address using string
tokenizer.
4.
Write a program to create singleton class
5.
write a function to reverse the string
6.
Write a prog to print prime nos upto n. EX: If n=9, It shld
print 1,2,3,5,7
7. One program on collections- Write a program to print no.
of times a number is repeating in an array.
EX- {1,3,1,2,5,7,3,7,34,3,8,3}
It should print: 1- 2 times
3- 4 times and so on
7. Write a func to print fibonocci series
After this I had technical interview, which went on for.
60 mins or so. There were qn's about multi threading,
Exception handling and collection classes.
Knowledge about collections was very important for the
post I was interviewed for. | Huawei | 1 |
| How many bits are allocated to represent character of
character sets - Unicode, ASCII, UTF-16, UTF-8? | | 1 |
| Difference between String and StringBuffer. | IBM | 3 |
| what is difference between Exception and Error? | | 13 |
| What is the use of ?this?? | | 4 |
| What are File and RandomAccessFile classes? | | 1 |
| how can we use the servlet as standalone apllication?should
we need to extend any class? | Logica-CMG | 2 |
| Is multiple inheritance allowed in Java? Why ? | | 5 |
| What are batch updates. in jdbc | Corent-Technology | 2 |
| my method "abc" return array of interface "xyz"
and "pqr" is abstract class implements abc
and class "jkl" extends pqr
My problem
1) when i call abc it retrun array xyz how can i do this
hint
xyz refer_xyz = new jkl();
but i can't create array.
2)I want to access method of jkl using reference of xyz??
| | 1 |
| What is an Iterator interface? | | 2 |
| Same common question what is Map,Set,HashMap,List???? | Symphony | 3 |
| What is Session and cookies?Explain in detail with an
example? | CTS | 2 |
| Explain the term serialization? | Wipro | 6 |
| How do you set security in applets? | Wipro | 1 |
| What is the importance in context in JDBC connection pools? | iFlex | 2 |
| What is adapter class? | | 2 |
| What are E and PI? | | 1 |
| |
| For more Core Java Interview Questions Click Here |
along with your userid / name. ThanQ
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