Free Printable CSA Unit 3 Review

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CSA Unit 3 Review

Total questions: 20

Worksheet time: 17mins

Name

Class

Date

This is an array called values. What is the value of values.length?

Index values of an array range from ______________.

0 to length – 1

1 to length

0 to length

0 to length + 1

Create an array of 12 Strings called months.

String[] months = new String[12];

String months = new String[12];

String[] months = new String[];

String[12] months = new String[];

Based on the statement below, which of the following statements gives the length of the data array?
double[ ] data = new double[10];

data.size()

data.length

data.size

data.length()

What is the error in the following code fragment?
double[ ] data = new double[20];
data[20] = 15.25;

A cast is required

data not initialized

A two-dimensional array is required

Out-of-bounds error

The first value of an array called quizzes can be accessed with which of the following statements?

quizzes[1] = 100;

quizzes[0] = 100;

quizzes[zero] = 100;

quizzes[one] = 100;

String word = "A few good men";
What is word.length()?

String word = "A few good men";
What is word.charAt(7) ?

good men

String word = "A few good men";
What is word.indexOf('f')?

-1

10.

String word = "A few good men";
What is word.indexOf(“bad”)?

-1

11.

String word = "A few good men";
What is word.substring(3, 7) ?

ew g

ew go

few

few[space]

12.

What are the indexes for the array arr, given the following declaration:

int[] arr = {2, 4, 6, 8 }

0, 1, 2, 3

1, 2, 3, 4

2, 4, 6, 8

0, 2, 4, 6

13.

What is the output of the following code fragment:

int[] arr = {2, 4, 6, 8 };

System.out.println( arr[0] + " " + arr[1] );

2 6

2 4

6 8

14.

In the given code segment, assume String str has been declared and initialized. The code is supposed to print the number of Strings in the array animals that have str as a substring. The code does not work as intended. Which of the following changes should be made so the code works as intended.

The stopping condition should be changed to i < animals.length

The stopping condition should be changed to i < animals.length - 1

The stopping condition should be changed to i < animals[i].length

The if statement should be changed to animals[i].equals(str)

15.

String sentence = "Hello World!";
What is sentence.indexOf("W")?

-1

16.

Given an array int[] numbers = {10, 20, 30, 40};
What is the value of numbers[2]?

17.

What is the output of the following code fragment:

String[] fruits = {"apple", "banana", "cherry"};

System.out.println(fruits[1]);

apple

banana

cherry

fruits

18.

How would you get the value 6 out of the following array int[][] a = { {2, 4, 6, 8}, {1, 2, 3, 4}};?

a[0][3]

a[1][3]

a[0][2]

a[2][0]

a[3][1]

19.

Given the following code segment, what is the value of sum after this code executes?

20.

What are the contents of arr after the following code has been executed?

{ {6, 4, 2}, {2, 4, 6}}

{ {3, 2, 1}, {1, 4, 6}}

{ {3, 2, 1}, {1, 4, 8}}

{ {4, 4, 2}, {2, 4, 4}}

{ {3, 2, 1}, {2, 4, 4}}

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CSA Unit 3 Review

Total questions: 20

Worksheet time: 17mins

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