Java Online Quiz
Following quiz provides Multiple Choice Questions (MCQs) related to Core Java. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.
Answer : A
Explaination
Primitive variables like int, float are stored on Stack.
Answer : C
Explaination
The short data type is represented by 16-bit signed two's complement integer.
Minimum value: -32,768
Maximum value: 32,767
Answer : A
Explaination
Byte variable has default value of 0 if defined as an instance/static variable.
Q 4 - Which of the following is true about protected access modifier?
A - Variables, methods and constructors which are declared protected can be accessed by any class.
Answer : C
Explaination
Protected access modifier is used to restrict access to variables, methods and constructors to subclass only. Subclass can lie in different package.
Q 5 - What is inheritance?
A - It is the process where one object acquires the properties of another.
B - inheritance is the ability of an object to take on many forms.
C - inheritance is a technique to define different methods of same type.
Answer : A
Explaination
It is the process where one object acquires the properties of another. With the use of inheritance the information is made manageable in a hierarchical order.
Answer : B
Explaination
No, this is not possible.
Q 7 - What is function overloading?
A - Methods with same name but different parameters.
B - Methods with same name but different return types.
C - Methods with same name, same parameter types but different parameter names.
Answer : A
Explaination
If a class has multiple functions by same name but different parameters, it is known as Method Overloading.
Q 8 - What is Serialization?
A - Serialization is the process of writing the state of an object to another object.
B - Serialization is the process of writing the state of an object to a byte stream.
Answer : B
Explaination
Serialization is the process of writing the state of an object to a byte stream.
Q 9 - What will happen if static modifier is removed from the signature of the main method?
B - RunTime Error: NoSuchMethodError.
C - Program will compile and run without any output.
D - Program will compile and run to show the required output.
Answer : B
Explaination
Program throws "NoSuchMethodError" error at runtime.
Answer : A
Explaination
Postfix operators i.e () [] . is at the highest precedence.
