Practice converting hexadecimal numbers to binary and decimal numbers, in this set of practice questions designed for AP Computer Science Principles students.

Each computer receives input from a variety of devices, processes that data with the CPU and memory, and sends results to some form of output. This diagram visualizes that flow.

Learn the basics of what makes up a computer.

Computer memory and storage are explained.

Learn about malware, how it is installed on a computer, and what type of damage it can do.

Learn about the internet, the world's largest computer network.

Learn about some of the different computer file types.

Over 800 questions to help prepare for the AP Computer Science Principles exam.

Practice using compound boolean expressions with AND/OR/NOT for programs in the AP CSP pseudocode, in this set of free practice questions designed for AP Computer Science Principles students.

Check your understanding of the DNS (domain name system) and DNS spoofing, in this set of free practice questions designed for AP Computer Science Principles students.

Check your understanding of IP addresses (v4 and v6), in this set of free practice questions designed for AP Computer Science Principles students.

Practice using nested conditionals in programs in the AP CSP pseudocode, in this set of free practice questions designed for AP Computer Science Principles students.

Practice defining procedures with parameters for programs in the AP CSP pseudocode, in this set of free practice questions designed for AP Computer Science Principles students.

Practice computer science problems expressing algorithms.

Check your understanding of lossy and lossless compression techniques, in this set of free practice questions designed for AP Computer Science Principles students.

Reducing the file size using Lossless and Lossy for file compression.

Bits and binary data are explained.

Practice using iteration in computer programs to repeat code until a boolean expression is true for programs written in the AP CSP pseudocode, in this set of practice questions designed for AP Computer Science Principles students.

Practice storing strings in computer programs, in this set of free practice questions designed for AP Computer Science Principles students.

Check your understanding of run time efficiencies and categorize which ones are reasonable in these practice questions designed for AP Computer Science Principles students.

Check your understanding of copyright, DMCA, Creative Commons and open source licenses in this set of free practice questions designed for AP Computer Science Principles students.

Check your understanding of expressing simple algorithms in flow charts, natural language, and pseudocode, in this set of free practice questions designed for AP Computer Science Principles students.

Check your understanding of what simple statistics can be computed on a data set, in this set of free practice questions designed for AP Computer Science Principles students.

Check your understand of the ways you can find patterns in data sets (like trends and correlations) in this set of free practice questions designed for AP Computer Science Principles students.