Java Array Test - 2 - Sanfoundry

1. Can you make an array volatile?

False

True

2. Where is an array stored in memory?

first generation memory

heap space

heap space and stack space

stack space

3. 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[];
arr = new int[5];

4. How to sort an array?

System.sort()

Arrays.sort()

Collection.sort()

Array.sort()

5. What will be the output of the following Java code?

int arr[] = new int [5];
System.out.print(arr);

00000

value stored in arr[0].

Garbage value

6. What will be the output of the following Java code snippet?

Object[] names = new String[3];
names[0] = new Integer(0);

Code runs successfully

Compilation Error

ArrayIndexOutOfBoundsException

ArrayStoreException

7. What is the type of variable 'b' and 'd' in the following Java snippet?

int a[], b;
int []c, d;

'd' is int variable; 'b' is int array

'b' and 'd' are arrays of type int

'b' and 'd' are int

'b' is int variable; 'd' is int array

8. An array elements are always stored in ________ memory locations.

Sequential and Random

Binary search

Random

Sequential

9. How to copy contents of array?

Arrays.copy()

System.arrayCopy()

Collection.copy()

Array.copy()

10. Generics does not work with?

Array

Tree

Set

List