Java Skill Assessment

Written by Coursera • Updated on

Test your Java skills with this quick assessment. Answer 10 multiple-choice questions to get your score, then check the Scoring Guide to find your level and recommended learning path.

Java Skill Assessment

Java Programming Quiz

1. What is the difference between == and .equals() when comparing objects?

No difference
== compares memory references, .equals() compares content
== is faster than .equals()
.equals() works only with strings

2. Which statement about Java interfaces is correct?

They can contain implemented methods only
They can contain both default and abstract methods
They can be instantiated
They can contain protected methods

3. What is the output of this code?

List<String> list = new ArrayList<>();
list.add("A");
list.add("B");
list.add(1, "C");
System.out.println(list);
[A, B, C]
[A, C, B]
[C, A, B]
Error

4. What is the purpose of the synchronized keyword?

To make code run faster
To prevent multiple threads from accessing the same resource simultaneously
To synchronize data with a database
To create synchronized collections

5. Which collection would you use to store unique elements in sorted order?

ArrayList
TreeSet
HashMap
LinkedList

6. What is the difference between Checked and Unchecked Exceptions?

No difference
Checked exceptions must be declared or handled, unchecked don't need to be
Unchecked exceptions are more severe
Checked exceptions occur at runtime only

7. What is a Lambda expression in Java?

A mathematical function
A way to implement functional interfaces
A type of loop
A method to handle exceptions

8. What is the purpose of the volatile keyword?

To mark variables as constant
To ensure a variable is read from main memory, not thread cache
To make variables thread-safe
To optimize performance

9. Which feature was introduced in Java 8?

Generics
Stream API
Try-with-resources
Switch expressions

10. What is the purpose of the Optional class?

To make variables optional in method parameters
To handle null values more gracefully
To create optional methods
To optimize memory usage

Scoring Guide & Course Recommendations

0-30: Beginner Level

40-70: Intermediate Level

80-100: Advanced Level

  • Skill Level: Experienced Java developer

  • Recommended Coursera Courses:

    1. Advanced Java by LearnQuest

      • Microservices with Spring Boot and Spring Cloud

      • Advanced web development techniques

    2. Java Enterprise by LearnQuest

      • Advanced web programming and Java EE

      • Enterprise application integration

Skills Covered by Level

Beginner Level

  • Basic syntax

  • Control structures

  • OOP basics

  • Basic data types

  • Arrays and collections

  • Exception handling

Intermediate Level

  • Advanced OOP

  • Collections framework

  • Multithreading basics

  • File I/O

  • JDBC

  • Basic design patterns

Advanced Level

  • Design patterns

  • Enterprise Java

  • Microservices

  • Performance optimization

  • Concurrency patterns

  • Application security

Career Paths

Key Technologies to Learn

  • Core Java

  • Spring Framework

  • Hibernate

  • JUnit

  • Maven/Gradle

  • Git

Updated on
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Coursera

Writer

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