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Java Interview Questions different topics - 13

Question: 1

On which platforms Java runs?

(A) Windows
(B) Mac OS
(C) UNIX
(D) All of these

Level: Beginner Category of MCQ: other

Question: 2

Which of these are Access Modifiers in java?

(A) default
(B) public
(C) protected
(D) All of these

Level: Practitioner Category of MCQ: other

Question: 3

public class CppBuzz {

public static void main(String args[]) {
    
     System.out.println(""cpp'� 'buzz"");
      
    }
}

(A) "cpp''buzz"
(B) "cpp''buzz"
(C) cpp''buzz
(D) Compilation Error

Level: Expert Category of MCQ: other

Question: 4

Java has 5 phases, Editing, Compilation, Loading, Verification & Execution. Which of the following unit is responsible for execution?

(A) Compiler
(B) Class Loader
(C) Byte Code Verifier
(D) Java Virtual Machine

Level: Beginner Category of MCQ: other

Question: 5

What is correct sequence of execution of any Java  program?

(A) Editing -> Compilation -> Class Loader -> Bytecode Verifier -> Execution
(B) Editing -> Bytecode Verifier -> Compilation -> Class Loader -> Execution
(C) Editing -> Compilation -> Bytecode Verifier -> Class Loader -> Execution
(D) None of the above

Level: Beginner Category of MCQ: other

Question: 6

Arrays is a group of similar type of datatype

(A) True
(B) False

Level: Beginner Category of MCQ: other

Question: 7

Java supports single-line and multi-line comments very similar to C and C++

(A) True
(B) False

Level: Beginner Category of MCQ: other

Question: 8

What is the use of Garbage Collector in Java?

(A) Automatic Memory Management
(B) Speed-up the Execution of Java code
(C) to handle runtime exceptions
(D) All of these

Level: Practitioner Category of MCQ: other

Question: 9

Converting an object of type (Integer) to its corresponding primitive (int) value is known as

(A) Autoboxing
(B) Morphing
(C) Unboxing
(D) Typecasting

Level: Expert Category of MCQ: other

Question: 10

What is use of join() in threads of Java?

(A) The main thread waits for other threads to finish
(B) The main thread is finished first then other threads
(C) Other threads will sleep until main is complete
(D) All of these

Level: Practitioner Category of MCQ: other

Question: 11

class Main {   
   public static void main(String args[]) {      
         int t;      
         System.out.println(t); 
    }   
}

(A) 0
(B) garbage value
(C) runtime error
(D) compile time error

Level: Beginner Category of MCQ: other

Question: 12

Which of the following statements is/are TRUE regarding JAVA ? (a) Constants that cannot be changed are declared using the ‘static’ keyword. (b) A class can only inherit one class but can implement multiple interfaces.

(A) a
(B) b
(C) a and both
(D) Neither a nor b

Level: Beginner Category of MCQ: other

Question: 13

Note: Apache PDFBox is an open source pure-Java library that can be used to create, render, print, split, merge, alter, verify and extract text and meta-data of PDF files.

(A)
(B)
(D)

Level: Beginner Category of MCQ: other

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Java Interview Questions different topics - 13

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