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WorksheetsArrays
Total questions: 10
Worksheet time: 10mins
Name
Class
Date
1.
True or False: An array can be store different types of data (like store both doubles and ints).
a)
True
b)
False
2.
What is the correct way to create an array with these three numbers: 12 8 15
a)
int[] = {12, 8, 15};
b)
int[] nums = {12 8 15};
c)
int[] nums = {12, 8, 15}
d)
int[] nums = {12, 8, 15};
3.
What value is at index 3 in this array? String[] names = {"Mack", "Dennis", "Dee", "Charlie"};
a)
Mack
b)
Dennis
c)
Dee
d)
Charlie
4.
What value is at index 1 in this array? String[] names = {"Mack", "Dennis", "Dee", "Charlie"};
a)
Mack
b)
Dennis
c)
Dee
d)
Charlie
5.
What value is stored in each of the 5 positions in this array? (What is the default value provided by Java).
int[] numbers = new int[5];
int[] numbers = new int[5];
a)
null
b)
1
c)
0
d)
nothing
6.
What is the correct way to initialize an array with 10 positions?
a)
int numbers = new int[10];
b)
int[] numbers = new int[];
c)
int[10] numbers = new int[10];
d)
int[] numbers = new int[10];
7.
What does the following segment of code print out? int[] numArray = { 2, 7, 4, 12, 0, 2 };
System.out.println(numArray.length);
System.out.println(numArray.length);
a)
4
b)
5
c)
6
d)
7
8.
What does the following segment of code print out? int[] numArray = { 2, 7, 4, 12, 0, 2 };
System.out.println("Number: " + numArray[numArray.length - 1]);
System.out.println("Number: " + numArray[numArray.length - 1]);
a)
Number: 2
b)
Number: 0
c)
Number: 12
d)
Number: 6
9.
What does the following segment of code print out? int[] numArray = { 2, 7, 4, 12, 0, 2 };
System.out.println("Number: " + numArray[0]);
System.out.println("Number: " + numArray[0]);
a)
Number: 2
b)
Number: 7
c)
Number: 4
d)
Number: 12
10.
What does the following segment of code print out? int[] numArray = { 2, 7, 4, 12, 0, 2 };
System.out.println("Number: " + numArray[2]);
System.out.println("Number: " + numArray[2]);
a)
Number: 2
b)
Number: 7
c)
Number: 4
d)
Number: 12
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