JAVA CONCEPTS

Important Java Mcq 1

What is byte code in the context of java?

a. The type of code generated by the java compiler

b. The type of code generated by the Java virtual machine

c. It is another name for a java source file

d. It is another name for comments written within a program

Answer:

a. The type of code generated by the java compiler.

Explanation:

During the java compilation process, the compiler compiles the source code it generates a .class file, this file contains the byte code. In simpler terms, as soon as the java program is compiled bytecode is generated.

How restrictive is the default?

a. Less restrictive than public. b. More restrictive than public, but less restrictive than protected. c. More restrictive than protected, but less restrictive than private.

In java, boolean array elements automatically are assigned the value ____.

a. True b. False Answer: b. false Explanation: Variables with boolean data type are not assigned the value automatically.

Java create distributed application using the concept ?

a. RMI & CORBA b. RMI & JDBC c. CORBA & JDBC d. None of the above Answer: a. RMI & COBRA Explanation: CORBA interfaces are

Which one of the following is not true?

a. A class containing abstract methods is called an abstract class. b. Abstract methods should be implemented in the derived class. c. An abstract class cannot