JAVA CONCEPTS

Important Java Mcq 1

Which component is responsible to run the Java program?

a) JDK

b) JVM

c) JRE

d) SDK

Answer:

b) JVM

Explanation:

The JVM is the cornerstone of the Java programming language. It is responsible for Java’s cross-platform portability and the small size of its compiled code. The Solaris JVM is used to execute Java applications.

In Java control statements break, continue, return, try-catch-finally, and assert belong to?

a) Select statements b) Loop Statements c) Transfer statements d) Pause Statement Answer c) Transfer statements

Which of the following is a mutable class in java?

a) java.lang.String b) java.lang.Byte c) java.lang.Short d) java.lang.StringBuilder Answer d) java.lang.StringBuilder

Which of the following are not Java keywords?

a) Double b) Switch c) Then d) Instanceof Answer: c) Then

Which of the following are valid array declarations?

a. int number(); b. float average[]; c. counter int[]; d. []double marks; Answer: b. float average[]; Explanation: The correct syntax for declaring an array is