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.
Q 1 - What is correct syntax for main method of a java class?
A - public static int main(String[] args)
B - public int main(String[] args)
Answer : C
Explaination
Correct syntax is public static void main(String[] args).
Answer : D
Explaination
The long data type is represented by 64-bit two's complement integer.
Minimum value: -263
Maximum value: 263-1
Answer : A
Explianation
Byte variable has default value of 0 if defined as an instance/static variable.
Q 4 - Which of the following is true about super class?
Answer : D
Explaination
All of the above are correct.
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 : A
Explaination
Holding the reference of the other class within some other class is known as composition. It represents a HAS-A relationship. For example, a Student has a Pen. Here Student class has Pen as its instance variable.
Q 7 - Method Overloading is an example of
Answer : A
Explaination
Method Overloading is example of static binding.
Q 8 - What is a transient variable?
A - A transient variable is a variable which is serialized during Serialization.
B - A transient variable is a variable that may not be serialized during Serialization.
C - A transient variable is a variable which is to be marked as serializable.
Answer : B
Explaination
A transient variable is a variable that may not be serialized during Serialization and which is initialized by its default value during de-serialization.
Answer : B
Explaination
No, constructor cannot be inherited.
Q 10 - Which of the following is a marker interface?
Answer : A
Explaination
serializable is a marker interface.
