AP Computer Science Principles Unit 1 practice questions
Try 10 multiple-choice questions from Unit 1 here. Pick an answer to see why it's right or wrong, then take the timed test above for a full AP-style set.
Question 1
A developer aims to create a computing innovation to introduce programming concepts to children who cannot yet read. Which interface design best achieves this specific purpose?
A block-based environment using iconographic symbols to represent commands and logic.
A text-based editor that uses simplified syntax and keywords to reduce typing errors.
A drag-and-drop interface requiring users to type parameters for each command block.
A command-line tool that provides audio feedback when syntax errors occur in code.
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Answer: (A)
Matching interface constraints to user capabilities reveals the best design. Iconographic symbols allow users to manipulate logic without needing literacy skills, directly addressing the target audience's limitation.
Question 2
Public health officials want to design a contact tracing app that alerts users of potential virus exposure. The design must prioritize user privacy by avoiding the collection of geolocation data. Which technical approach best achieves this purpose?
Exchanging randomized Bluetooth tokens between devices to log proximity without recording location.
Recording GPS coordinates every minute to map user movements and identify overlap points.
Uploading a list of visited businesses to a central server to cross-reference with infected users.
Requiring users to scan QR codes at building entrances to create a centralized travel log.
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Answer: (A)
Evaluating privacy-preserving technologies allows for selecting the right method. Bluetooth tokens measure relative proximity to identify exposure risk without ever recording absolute location data, satisfying the privacy constraint.
Question 3
A team is developing an app to reduce food waste by connecting restaurants with surplus inventory to local shelters. The primary constraint is that food must be claimed and picked up within two hours. Which feature design best addresses this time constraint?
A push notification system that instantly alerts nearby shelters when food becomes available.
A weekly email newsletter summarizing the types of food donated by participating restaurants.
A discussion forum where shelters can post requests for specific food items they need.
A rating system allowing restaurants to review the reliability of shelter pickup drivers.
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Answer: (A)
Aligning technical features with time-sensitive constraints ensures success. Push notifications provide the immediate, real-time alerts necessary for a two-hour window.
Question 4
A distributed team of developers needs to write and edit the same source code file simultaneously while discussing changes in real-time. Which tool provides the most effective solution for this specific requirement?
A collaborative document editor that supports live syntax highlighting
A version control system that requires checking out files before editing
A project management platform that tracks tasks and assigns deadlines
A shared network drive that allows users to overwrite existing files
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Answer: (A)
Evaluating solution options requires matching tool capabilities to the specific constraint of simultaneous, real-time editing. A collaborative editor allows multiple users to type and view changes instantly, supporting the required synchronous workflow.
Question 5
Two students are using pair programming to develop a mobile application. Which of the following arrangements best represents an effective implementation of this collaboration model?
The driver writes the code while the navigator reviews it and suggests logic
The driver writes the code while the navigator works on a separate module
The driver plans the logic while the navigator writes the code on the computer
The driver tests the code while the navigator documents the user interface
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Answer: (A)
Evaluating the pair programming model requires understanding the distinct roles of driver and navigator. This option correctly identifies the driver as the typist and the navigator as the observer who reviews code and considers strategic direction.
Question 6
A software team with members in different time zones needs to track bugs and feature requests asynchronously. Which tool would best support this collaboration without requiring simultaneous availability?
An issue tracking system that records status updates and comments
A video conferencing tool that requires all members to join calls
A screen sharing application that allows remote control of desktops
A live chat application that deletes message history after one hour
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Answer: (A)
Evaluating tools for asynchronous work requires identifying systems that store state persistently. An issue tracker allows members to update and review tasks at their own convenience, making it ideal for distributed teams.
Question 7
During a group project, two developers disagree on the most efficient algorithm to sort a dataset. Which approach best demonstrates effective interpersonal skills for resolving this technical conflict?
Implementing both algorithms to compare their performance metrics empirically
Voting on the preferred algorithm based on which developer is more popular
Asking the team leader to choose the algorithm without reviewing the code
Deleting the disputed code and rewriting the module from scratch individually
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Answer: (A)
Evaluating conflict resolution strategies involves finding objective, constructive solutions. Comparing data allows the team to build consensus based on evidence rather than opinion or authority.
Question 8
A team is using a version control system to manage a shared codebase. A critical bug is introduced on Tuesday, but the code worked correctly on Monday. Which feature of the system best helps the team resolve this issue?
Reverting the codebase to the version stored in the repository from Monday
Deleting the repository to restart the project with clean code from Wednesday
Locking the repository so no new code can be added until the bug is fixed
Renaming the files in the repository to indicate they contain a critical bug
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Answer: (A)
Evaluating version control features requires understanding how history is managed. Reverting allows the team to instantly restore a known working state, minimizing downtime while the bug is investigated.
Question 9
A pair of programmers has been working for two hours with one person typing and the other reviewing. Which action would most likely improve their long-term productivity and code quality?
Switching roles frequently to keep both partners engaged and alert
Keeping the current roles to maintain the typing speed of the driver
Splitting up to work on different computers to double the code output
Stopping the review process to allow the driver to focus on syntax
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Answer: (A)
Evaluating pair programming best practices involves managing cognitive load. Frequent switching prevents fatigue for the driver and keeps the navigator actively involved in the logic.
Question 10
A development team wants to ensure their new educational game is accessible to students with visual impairments. Which collaboration strategy would best achieve this goal?
Consulting with visually impaired users throughout the design process
Asking the developers to close their eyes while testing the game audio
Reading online articles about accessibility features for video games
Hiring a graphic designer to create high-contrast color schemes only
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Answer: (A)
Evaluating accessibility strategies requires prioritizing direct user input. Consulting the target demographic ensures the solution addresses real-world needs rather than assumptions.
What's on the AP Computer Science Principles Unit 1 practice test
The standard version takes about 64 minutes and follows the timing and directions of the AP exam, sized to one unit:
- 20 Multiple Choice Questions (34 minutes)
- 1 FRQ – Written Response 1 (30 minutes)
Questions are drawn from 539 multiple-choice questions and 7 FRQs written for Unit 1, Creative Development.
Practice AP Computer Science Principles Unit 1 FRQs
Answer the unit's free-response questions one at a time and get a score on every part.
- Written Response 1 (7 questions)
Review Unit 1 before you start
- 1.1 Collaboration
- 1.2 Program Function and Purpose
- 1.3 Program Design and Development
- 1.4 Identifying and Correcting Errors
- Big Idea 1 Overview: Creative Development