JAVA ARRAYS Q1 Flashcards
What is the value of nums[4] after the code is execude?
int[] nums = new int[10];
for (int i = 0 ; i < 10 ; i++) for (int j = 1 ; j <= 10 ; j++)
nums[i] += i;
40
What is the value of nums[5] after this code is executed?
int[] nums = new int[10];
for (int i = 0 ; i < 10 ; i++) for (int j = 1 ; j <= 10 ; j++) nums[i] += j;
55
What is the result of this code executing?
nums[2]=nums[1];
nums[1]=nums[2];
nums[1] and nums[2] will both have the original nums[1] value.
which value is not valid as an index for the following array?
String[] words = new String[10];
10
TRUE OR FALSE
Java array indexes starts at 0
TRUE
what is the value of nums[3]?
int[] nums = new int[5];
for(int i=0; i <= 5 ; i++)
nums[i]= 4 * i;
12
Multiple choice
Which is the correct way to declare an array of 10 integers? (select 2)
A.) int[] nums = new int[10];
B.) int[] nums1 = {3, 5, 6, 1, 2, 7, 8, 12, 45, 6};
C.) int[] nums = new int[11];
D.) int[] nums1 = {6, 1, 2, 7, 8, 12, 45, 6);
A & B
Multiple Choice
What is the correct way to assign 4 to the 3rd position of the nums1 array?
A.) nums1[2]=3;
B.) nums1[3]=3;
C.) nums1[3]=4;
D.) nums1[2]=4;
D.) nums1[2]=4;
What number is at index 6?
int[] nums1 = {6, 1, 2, 7, 8, 12, 45, 6};
45
What is the length of the following array: int[] data = {12, 34, 9, 0, -62, 88 };
6
TRUE OR FALSE
A java array can hold multiple types of data
False
Which of the following is FALSE about arrays on java
A.) The size of an array can be changed after creation.
B.) Array inexes must be integers.
C.) Arrays can hold Strings.
D.) Arrays can hold doubles.
A.) The size of an array can be changed after creation.
What are the legal indexes for the array ar, given the following declaration:int[] ar = {2, 4, 6, 8}
0, 1, 2, 3
For the array:int stats [5]; What is the range of the index?
0-4
for(int i=0; i<10; i++) numbers[i] = 2 * i + 1;//Which index of the array holds the value of 7?
3
