JAVA CONCEPTS

Important Java Mcq 1

Is the method overriding a combination of inheritance and polymorphism?

a) True

b) False

Answer:

a) True

Explanation:

For method overriding, a method with the same signature in both superclass and subclass is required with the same signature. That satisfies both concepts of inheritance and polymorphism.

Which keyword is used to import a package from the Java API library?

a) lib b) package c) getlib d) import Answer d) import

Which of the following statements is incorrect with respect to overriding?

a. When overriding a method, the names and type signatures of the override method must be the same as the virtual method that is being

Which of the following is an implicit object?

a. Vector b. ln c. Response d. Request Answer: d. Request Explanation: The JSP request is an implicit object of type HttpServletRequest. It can be used

What is the output of the below Java program with constructors?

a) Count=0 b) Count=10 c) Compile error d) None of the above Answer c) Compile error