String vs StringBuilder in Java - Interactive Practice

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Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a new StringBuilder object.

Java

StringBuilder sb = new [1]();

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

AString

BStringBuilder

CStringBuffer

DStringBuilderBuilder

Attempts:

3 left

2fill in blank

medium

Complete the code to append text to a StringBuilder.

Java

sb.[1]("Hello");

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

Aadd

Bconcat

Cappend

Dinsert

Attempts:

3 left

3fill in blank

hard

Fix the error in converting StringBuilder to String.

Java

String result = sb.[1]();

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

AtoString

BtoStr

Cstringify

Dconvert

Attempts:

3 left

4fill in blank

hard

Fill both blanks to create a StringBuilder and append text.

Java

StringBuilder [1] = new [2]();
[1].append("World");

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

Asb

BStringBuilder

Cstr

DString

Attempts:

3 left

5fill in blank

hard

Fill all three blanks to build a string and convert it to String.

Java

StringBuilder [1] = new [2]();
[1].append("Hi");
String [3] = [1].toString();

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

Abuilder

BStringBuilder

Ctext

DStringBuffer

Attempts:

3 left