Java Fundamentals_Array

Which of the following is not a Java features?

• Dynamic

• Architecture Neutral

• Object-oriented

• Use of pointers

What is the extension of java code files?

• .class

• .txt

• .java

• .js

Predict the Output

• 10

• Compilation Error

• Run time Error

• 11

Which of the following is a valid declaration of an object of class Box?

• Box obj = new Box;

• Box obj = new Box();

• obj = new Box();

• new Box obj

What is the type of variable ‘b’ and ‘d’ in the following Java snippet?

int a[], b;

int []c, d;

• Both are int

• Both are array

• 'b' is int and 'd' is array

• 'b' is array and 'd' is int

Which of these is an incorrect array declaration?

• int arr[] = new int[5];

• int [] arr = new int[5];

• int arr[] = int [5] new;

• int[] arr={1,2,3,4,5};

How do you determine the number of elements in an array?

int buses[] = new int[5];

• buses.length

• buses.length()

• buses.size

• buses.size()

Which of the following creates an empty two-dimensional array with dimensions 2×2?

• int[][] blue = new int[2, 2];

• int[][] blue = new int[2], [2];

• int[][] blue = new int[2][2];

• int[][] blue = new int[2 x 2];

Predict the output

• 1

• 0

• Compilation error

• Runtime Error

Predict the output

• 0

• 1

• Compilation Error

• Runtime Error