10 OCJP questions to puzzle you

We are compiling 10 OCJP question with explanation for every question.

Use the basic java concept to answer all the below questions.

Question :1 

Explanation:

Choice B is correct.

When we compile above code we wont get any error as it is legal to write class in 

interface.

Question :2

Explanation:

Choice A is correct.

private members of a class can be accessed with in the class. According to this statement 

the inner class can also access the private member of a outer class

Question :3

Explanation:

Choice A is correct.

Arrays are objects because of which we will get true. InstanceOf can be used as variable 

so 10 will be printed

Question :4

Explanation:

Choice B is correct.

Creating File instance will not create a file, once we say createNewFile() with file instance 

then only a file will be created. so first f.exists() will give false and second f.exists() will 

give true

Question :5

Question :6

Explanation:

Choice C is correct.

Index based remove() method will return element at the specified position in this list.

Question :7

Explanation:

Choice A is correct.

Thread prioriy will have same priority as the priority of thread created it.

Question :8

Explanation:

Choice D is correct.

Character class don't have constructor which accepts String as argument.

Question :9

Question :10

You can check more questions on SCJP here.