JAVA CONCEPTS

Important Java Mcq 1

You read the following statement in a Java program that compiles and executes submarine.dive(depth); What can you say for sure?

a. Depth must be an int.

b. Dive must be a method.

c. Dive must be the name of an instance field.

d. Submarine must be a method.

Answer:

b. Dive must be a method.

Explanation

Generally, the syntax is Class.methodname(parameters). Here b options says dive is a method which matches the syntax!

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