If you're considering pursuing computer science and want to start earning college credit in high school, you're probably debating between taking AP computer science principles and AP computer science A.

These two advanced placement courses cover similar content, but the specifics and exam formats differ. 

The AP computer science A course and exam focus on computing skills associated with Java. AP computer science principles is a broader, conceptual look at the field of computer science. You can take one, the other, or both. Here's what you need to know to help you decide. 

What does AP computer science A cover?

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AP computer science A spans one semester and emphasizes using Java. Because Java is a vast programming language, the course focuses on object-oriented programming and design. 

The AP computer science A course includes 10 units of content. During the class, you gain insight into coding by using Java to write and test code as you explore topics like modularity, variables, arrays, and the impact of computing. 

By the time the course comes to an end, you'll have the skills to:

• Design programs
• Develop algorithms
• Write and implement code
• Test and document code

As part of the AP computer science A course, you complete a minimum of 20 hours of hands-on lab work. 

What classes should I take before enrolling in AP computer science A?

No previous coursework in computer science is required to enroll in AP computer science A.

However, the College Board