Learn Basics – Module 3 Lesson 2 – Quiz

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Question 1 of 5

1. Question

Which of the following best describes the main reasons for using packages in Java?

To increase compilation speed and reduce memory usage.
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To encrypt source code and hide it from other developers.
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To organize code and prevent naming conflicts.
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To improve performance and simplify debugging.
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Question 2 of 5

2. Question

If a class is declared without an access modifier (e.g., class TaskHelper), which visibility level does it have?

Public: It is visible to all classes in the project.
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Private: It is visible only within its own file.
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Package-private: It is visible only to other classes within the same package.
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Protected: It is visible to subclasses in any package.
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Question 3 of 5

3. Question

Which of the following statements is true regarding the directory structure of a Java project?

We have to create one directory for each package in the root folder, each matching exactly the corresponding package name (e.g. src/com.baeldung/, src/com.baeldung.domain/,…)
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While Java itself doesn't strictly enforce a directory structure, virtually all real-world projects and IDEs expect the directory layout to match the package name (e.g., package com.baeldung goes in src/com/baeldung).
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Package names must always be written in uppercase letters to match folder names.
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We have to add a metadata.xml file in the root directory, to indicate where each package is located in the directory structure
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Question 4 of 5

4. Question

Where must the package declaration appear in a Java source file?

It must be the very first line of code in the source file.
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Inside the main method.
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Immediately after the import statements.
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It must be the very last line of code in the source file.
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Question 5 of 5

5. Question

What is the standard naming convention for Java packages?

Use the organization's name followed by the year (e.g., baeldung2024).
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Use CamelCase with underscores (e.g., Com_Baeldung_Domain).
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Use the default package for all professional projects.
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Use the organization's internet domain name in reverse, using only lowercase letters (e.g., com.baeldung).
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Learn Basics – Module 3 Lesson 2 – Quiz

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