String immutability in Java - Interactive Code Practice

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Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a new string by adding " World" to the original string.

Java

String greeting = "Hello";
String newGreeting = greeting[1]" World";

🎯 Drag options to blanks, or click blank then click option

A+

B-

C*

D/

Attempts:

3 left

2fill in blank

medium

Complete the code to convert the string to uppercase.

Java

String text = "hello";
String upperText = text.[1]();

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AtoUpperCase

BtoLowerCase

Ctrim

Dsubstring

Attempts:

3 left

3fill in blank

hard

Fix the error in the code to correctly replace "cat" with "dog" in the string.

Java

String animal = "cat";
String newAnimal = animal.[1]("cat", "dog");

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AreplaceAll

BreplaceWith

CreplaceFirst

Dreplace

Attempts:

3 left

4fill in blank

hard

Fill both blanks to create a new string with "Java" repeated 3 times.

Java

String repeated = "Java".[1](3);
String result = repeated.[2]();

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Arepeat

BtoString

Ctrim

Dconcat

Attempts:

3 left

5fill in blank

hard

Fill all three blanks to create a new string with the first 4 characters of "immutable" in uppercase.

Java

String word = "immutable";
String part = word.[1](0, [2]);
String result = part.[3]();

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Asubstring

B4

CtoUpperCase

Dlength

Attempts:

3 left