| Other Core Java Interview Questions |
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| Question | Asked @ | Answers |
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| 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 |
| Under what circumstances an object reference be cast to an
interface reference? | | 3 |
| Difference between Web-based applications,Client-
Server applications and Distributed applications? | Infosys | 2 |
| Why null interfaces are used in Java? | | 2 |
| What is an event? | | 1 |
| what release of java technology are currently available what
do they contain? | | 1 |
| can we create a instance for intwerface? | | 3 |
| What advantage does an entity bean have over a sessin bean? | Adobe | 3 |
| What is meant by serialisation and deserialisation? | | 3 |
| what are depricated methods ? | Satyam | 4 |
| What is dynamic binding? | | 2 |
| How can a class be accessed, If no access modifiers are
declared? | | 2 |
| How to find the size of an array
a)array.length()
b)array.length
c)array.size()
d)array.size | Accenture | 6 |
| who can we create the object of a class? in how many ways we
can create it (max 5) | | 1 |
| What is the difference between Abstract Class and Interface | AMDOC | 6 |
| when asub class inherits a super class and overrides a
public method of super class in sub class(public method in
super class).
why these methods needs to be public in sub class.
(otherwise compile time error). | | 2 |
| what is webservices? | CTS | 1 |
| What is the life cycle of Thread ? | HCL | 7 |
| How to avoid the runtime exception ? | | 2 |
| what are Checked & Unchecked exceptions ? | | 2 |
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