| Other Core Java Interview Questions |
| |
| Question | Asked @ | Answers |
| |
| What is the difference between throw and throws?
What is the similarity between try and throw? | | 2 |
| what is the difference between equals method and == | Professional-Access | 11 |
| Why const and goto are reserved keyword in java? | | 1 |
| Why do inner class cannot have static declaration except
static nested class? | Wipro | 1 |
| What are null interfaces? Give some examples? | | 2 |
| What happens when you assigned a 'double' value to
a 'String'? | | 6 |
| Nullpointer exception is a very common exception. Why is it
not made as a checked exception? | Ness-Technologies | 1 |
| Difference between array and arraylist. | Sai-Softech | 4 |
| What is the differenc between Enemuration interface and
iterator interface according to accessing? | | 4 |
| Hi Friends, can u give me Real Time example for interface
and abstract class.(With Banking Example) | | 1 |
| class A{
some variables;
public void a()throws Excepion1,Exception2{....}
}
class B extends A{
variables...
public void a()throws E2,E3{.....}
}
Qns:
here override of methods occurs or not,ore else wil give
any compilation error or run properly..plz tell me briefly
whts happening with the above codes.... | Quinnox | 3 |
| What is meant by packages? | | 2 |
| Program to find greatest prime number in n numbers? | Huawei | 3 |
| 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 |
| Which of these methods belong to Thread & Object class?
join, yield, sleep, wait, notify | Ericsson | 2 |
| which class to use when concatenating
strings in a loop. | IBM | 2 |
| Can we declare an anonymous class as both extending a class
and implementing an interface? | Wipro | 7 |
| What are teh sub-classes of a component class? | | 2 |
| what is life cycle of applet? | | 4 |
| what is java | Tech-Mahindra | 1 |
| |
| For more Core Java Interview Questions Click Here |
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