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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: other
[Posted by: Admin | Chicago, USA]

Question: 2

Which of these are Access Modifiers in java?

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

Level: Practitioner Category: other
[Posted by: Admin | Chicago, USA]

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: other
[Posted by: Admin | Chicago, USA]

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: other
[Posted by: Admin | Chicago, USA]

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: other
[Posted by: Admin | Chicago, USA]

Question: 6

Arrays is a group of similar type of datatype

(A) True
(B) False

Level: Beginner Category: other
[Posted by: Admin | Chicago, USA]

Question: 7

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

(A) True
(B) False

Level: Beginner Category: other
[Posted by: Admin | Chicago, USA]

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: other
[Posted by: Admin | Chicago, USA]

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: other
[Posted by: Admin | Chicago, USA]

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: other
[Posted by: Admin | Chicago, USA]

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: other
[Posted by: Arvind | Navi Mumbai India]

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: other
[Posted by: Arvind | Navi Mumbai India]

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: other
[Posted by: Admin | Chicago, USA]

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Java Interview Questions different topics - 13

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