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Java - Test Questions on 'jvm' - 13 questions found


Which is of the following is NOT TRUE for JVM ?Core Java
JVM reads Byte Code and generates Machine Code.
JVM is a virtual Machine that acts as a intermediary between Java Application and Host Operating System.
JVM reads Source Code and generates Byte Code.
JVM acts as a translator that translates different Machine code ( on the basis of Host Machine ) for a common Byte Code.

  java  jvm

When String literals are compared using ==, they always returns true if the string values are same because .. Core Java
of overridden compareTo method
of overridden compare method
of String Pool
== means that the object contents are equal

  

What is a default constructor ?Core Java
Constructor without parameters declared by user
Constructor provided by Java if no constructor is declared
Constructor with empty body
All of the above

  Constructor

What will be the output of following code ?

String str1 = "String1";
String str2 = "String2";
str1.concat("String3");
System.out.print(str1);
System.out.print(str2);
Core Java
String1String2
String1String3String3
String1String3String1String3
String1String1

  

Which of the following about Garbage collection is false ?Core Java
We can call Garbage collection explicitly
Garbage Collection guarantees that the application will not run out of memory
finalize method is used by Java for Garbage Collection
Garbage Collection Mechanism delete unclaimed objects that are no longer required

  garbage collection

Thread thats executed before the JVM exits is called ..Core Java
final thread
finally thread
daemon thread
shutdown hook

  

Which memory segment holds String Pool ?Core Java
Stack
Heap
Code Segment
Class Segment

  memory management  string pool

In this code

public class BuggyBread1{
   private static String staticVariable = "static Variable";
   
   private String instanceVariable = "instance Variable";
   
   public static void main (String args[]) {
String localVariable = "local Variable";
}
}

Where will the value 'static Variable' be stored ?
Core Java
Stack Memory Segment
Heap Memory Segment
Runtime Constant Pool within Heap Segment
Code Segment

  memory manegement

In this code

public class BuggyBread1{
   private static String staticVariable = "static Variable";
   
   private String instanceVariable = "instance Variable";
   
   public static void main (String args[]) {
String localVariable = "local Variable";
}
}

Where will the value 'static Variable' be stored ?
Core Java
Stack Memory Segment
Heap Memory Segment
Runtime Constant Pool within Heap Segment
Code Segment

  memory management

In this code

public class BuggyBread1{
   private static String staticVariable = "static Variable";
   
   private String instanceVariable = "instance Variable";
   
   public static void main (String args[]) {
String localVariable = new String("local Variable");
}
}

Where will the value 'local Variable' be stored ?
Core Java
Stack Memory Segment
Heap Memory Segment
Runtime Constant Pool within Heap Segment
Code Segment

  memory management

In this code

public class BuggyBread1{
   private static String staticVariable = new String("static Variable");
   
   private String instanceVariable = "instance Variable";
   
   public static void main (String args[]) {
String localVariable = "local Variable";
}
}

Where will the value 'static Variable' be stored ?
Core Java
Stack Memory Segment
Heap Memory Segment
Runtime Constant Pool within Heap Segment
Code Segment

  memory management

Default Constructor is provided by Java ... Core Java
To Reserve Memory
To provide at least one instance method
To Make it look good
To initialize the object state

  Constructor

Which of following memory segment is cleaned by Garbage Collection Mechanism ?Core Java
Stack
Heap
Code
Cache

  memory management  garbage collection







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