JAVA CONCEPTS

Important Java Mcq 1

Which of these keywords is used to refer to member of base class from a subclass?

a) upper

b) super

c) this

d) none of the mentioned

Answer

b) super

Explanation:

Whenever a subclass needs to refer to its immediate superclass, it can do so by use of the keyword super.

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