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Java - Test Questions on 'Commvault' - 11 questions found
Which of the following Java feature promotes access protection or Hiding ?
Reference
Core Java
Inheritance
Encapsulation
Abstraction
Composition
java
java concepts
java features
oops concepts
oops features
access protection
information hiding
Which of the following is true ?
Core Java
Composition is Tightly Bound
Inheritance is Tightly Bound
Object can only hold reference of only one other object
A Class cannot be extended by multiple classes
What is the relationship between Vehicle and Engine in this example ?
public class Vehicle {
Enginer engine;
public void move(){
engine = new Engine();
engine.start();
}
}
Core Java
Composition ( Vehicle has a Engine )
Composition ( Engine has a Vehicle )
Inheritance ( Vehicle is a Engine )
Inheritance ( Engine is a Vehicle )
composition
inheritance
oops concepts
What is the relationship between Car and Vehicle in the following code ?
public class Car extends Vehicle{
Engine engine;
public static void main(String[] args){
Vehicle vehicle = new Car();
car.move();
}
public void move(){
engine = new Engine();
engine.start();
}
}
Core Java
Composition ( Vehicle has a Car )
Composition ( Car has a Vehicle )
Inheritance ( Vehicle is a Car )
Inheritance ( Car is a Vehicle )
Inheritance
Composition
Oops concepts
What is the problem with the following code ?
public class Car extends Vehicle{
Vehicle vehicle;
Car(){
super();
this.vehicle = new Vehicle();
}
}
Core Java
There is an Inheritance as well as Composition relationship between Vehicle and Car which is not permitted
We cannot initialize the parent class instance within the constructor
Call to super is illegal
There is no problem
Composition
Inheritance
OOPS concepts
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
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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