Crowdly

We have an Info class defined by the attributes: identity, name, firstName. What does the following code display ?

with ==, info1 et info2 are equal : (info1 == info2)

with ==, info1 et info2 are equal : false

Something else

with ==, info1 et info2 are equal : true

false

In which case it is better to use an ArrayList instead of a LinkedList for an application?

ArrayList is preferred when there is an increasing need for merge or sort operations.

ArrayList is preferred when insert or delete methods are required in the application.

None of the answers

ArrayList is better when there is more demand for get() method via index operations.

No difference

What will be the order of the array elements at the end of the program?

12, 15, 11, 13, 9, 25

Compilation Error

9, 11, 12, 13, 15, 25,

12, 11, 13, 9, 15, 25

Throws ArrayIndexOutOfBoundsException

Which of the following code fragments correctly uses the ArrayList class?

List list = new ArrayList[10];

list[0] = "Hello";

List list = new ArrayList[10];

list.add("Hello");

List list = new ArrayList();

list.add(10);

List list = new ArrayList();

list.add(Hello);

List list = new ArrayList();

list.add("Hello");

What is the output of the following Java Program?

Base

Derived

Base

Derived

Base

Derived

What is the output of the following Java code?

What is the output of the following program?

Both XXXXX and ppp will be displayed once

Prints ppp 8 times and XXXXX 7 times

Prints XXXXX 15 times

Prints ppp 15 times

Prints XXXXX 8 times and ppp 7 times

What is the correct output for this code?

G = 3.14

G = 3.14

Consider a Java interface InterfaceEx and a method of a class A whose signature is the following: public String proc(InterfaceEx i)

It is possible to pass as a parameter of the method proc an object which type (class B) implements the interface InterfaceEx.

The class A must implement the methods of the InterfaceEx interface

The InterfaceEx interface must implement the method proc