Check your understanding of files types, file metadata, and file sizes (bytes/kilobytes/etc), in this set of free practice questions designed for AP Computer Science Principles students.

Check your understanding of HTTP requests and responses, in this set of practice questions designed for AP Computer Science Principles students.

Check your understanding of HTTPS (secure web browsing), in this set of practice questions designed for AP Computer Science Principles students.

Check your understanding of using wires to represent bits, in this set of free practice questions designed for AP Computer Science Principles students.

Practice verifying whether algorithms are correct with empirical analysis and logical reasoning, in this set of free practice questions designed for AP Computer Science Principles students.

Practice variable assignment in the AP CSP pseudocode, in this set of free practice questions designed for AP Computer Science Principles students.

Check your understanding of when algorithms use heuristics and which problems are undecidable, in this set of free practice questions designed for AP Computer Science Principles students.

Check your understanding of Transport Layer Security (TLS) / Secure Sockets Layer (SSL), in this set of free practice questions designed for AP Computer Science Principles students.

Check your understanding of bandwidth and latency in internet connections, in this set of free practice questions designed for AP Computer Science Principles students.

Check your understanding of packet sending on the internet with the TCP (Transmission Control Protocol), in this set of free practice questions designed for AP Computer Science Principles students.

Check your understanding of symmetric encryption techniques, in this set of free practice questions designed for AP Computer Science Principles students.

Practice using the building blocks of algorithms (sequencing, insertion, and selection), in this set of free practice questions designed for AP Computer Science Principles students.

Practice programming with string operations like concatenation and substring in the AP CSP pseudocode, in this set of free practice questions designed for AP Computer Science Principles students.

Practice storing and updating lists for programs written in the AP CSP pseudocode, in this set of free practice questions designed for AP Computer Science Principles students.

Practice iteration (repeating code multiple times with loops) for programs written in the AP CSP pseudocode, in this set of free practice questions designed for AP Computer Science Principles students.

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

Practice using mathematical expressions for programming in the AP CSP pseudocode, in this set of free practice questions designed for AP Computer Science Principles students.

Computer networks are based on passing messages from computer to computer. This sounds simple in principle, but in practice all sorts of contention and bottlenecks can occur. This activity gives some first hand experience of such issues,...

Learn the building blocks of algorithms in computer science.

Learn about the open source jQuery source code programmers use in programming interactive web pages.

Learn about IP packets in computer networking.

Find out how computer programs instruct computers how to process data.

A computer can compute results for them in a fraction of a second. Find out how we actually get the computer to do math for us?

Practice using procedures with parameters for computer programming.