- CHS-CY1 refers to CodeHS Cybersecurity Level 1, a certification exam issued by CodeHS.
- The exam has 45 multiple-choice questions and a 90-minute time limit.
- CodeHS lists the passing score as 60% for all certification exams except Java.
- Six topic areas are covered, from Cybersecurity Essentials to Digital Safety and Data Security.
The Short Answer: What the Code Means
If you landed here searching for what "CHS-CY1" means, here is the direct answer: it is the shorthand for CodeHS Cybersecurity Level 1, a certification exam offered by CodeHS. The code points to an entry-level credential that tests foundational cybersecurity knowledge through an online, timed, multiple-choice exam.
On this site, the acronym means exactly that and nothing else. Other credentials in the wider certification world may reuse similar letters, but everything covered here refers specifically to the CodeHS exam. If you want the broader picture of the credential itself, our overview pages on what CHS-CY1 is and the CHS-CY1 certification go deeper into the basics.
Decoding the Label Piece by Piece
Certification codes often look cryptic, but this one breaks down into recognizable parts. Understanding the structure helps you search accurately, avoid confusion with unrelated credentials, and talk about the exam clearly with teachers, employers, or classmates.
| Part of the Label | What It Points To |
|---|---|
| CHS | The CodeHS certification family (the issuer's naming prefix) |
| CY | Cybersecurity as the subject area |
| 1 | Level 1, the foundational tier of the cybersecurity track |
The "Level 1" part matters. It signals that the exam targets foundational understanding rather than advanced, hands-on practitioner skills. CodeHS also has a Cybersecurity Level 2 offering, but that is a different exam with different topics. Nothing about Level 2 content should be assumed when you prepare for Level 1. For a fuller look at how the label gets interpreted, see what CHS-CY1 stands for and the CHS-CY1 meaning page.
What the Credential Actually Is
CHS-CY1 is a certification exam published by CodeHS, an education technology company known for computer science courses used in schools. The exam gives students and learners a way to demonstrate that they understand the core ideas of cybersecurity, from why phishing works to how SQL injection exploits a database.
Format at a Glance
- Question count: 45 multiple-choice questions
- Delivery: Online, timed exam
- Time limit: 90 minutes, per the CodeHS Certifications FAQ
- Passing score: 60% (CodeHS applies this to all certification exams except Java)
- Prerequisites: None
- Credential lifespan: CodeHS states certification credentials expire after 10 years
Because the passing mark is expressed as a percentage, the math on a 45-question exam is straightforward. You can work out the number of questions you need correct by applying 60% to 45. Our passing score breakdown walks through what that means in practice, and the requirements guide covers eligibility in more detail.
The Six Content Areas Behind the Name
The official exam overview lists six "Topics and Concepts Covered" headings. CodeHS does not publish percentage weights for these areas, so you should treat all six as fair game rather than assuming one dominates. Here is each area with the specific topics listed under it.
Domain 1: Cybersecurity Essentials
The conceptual foundation of the exam. Expect questions that test whether you can recognize threats and apply core security principles.
- Ransomware and phishing
- Internet of Things
- The CIA Triad (confidentiality, integrity, availability)
- Cyber ethics, credit and copyright
- Legal vs. illegal hacking
Domain 2: Cryptography
The classic ciphers and the methods used to break them. This domain rewards understanding how an approach works, not just recognizing its name.
- Basic cryptography and code breaking
- Brute force and frequency analysis
- Caesar cipher
- Vigenere cipher
Domain 3: System Administration
How computers are managed, secured, and operated day to day.
- Operating systems
- Software and software licenses
- Application security and browsers
- System administration and the command line
Domain 4: IT Concepts
The networking fundamentals that make the internet work.
- Internet addresses
- IPv4 and IPv6
- DNS hierarchy
- Routing
- Packets and protocols
Domain 5: IT Infrastructure
The physical and logical building blocks of computer systems and networks.
- Internal components and peripheral devices
- Network devices
- Storage options
- Network options, communication, and management
Domain 6: Digital Safety and Data Security
Personal safety online combined with a first look at data-layer attacks.
- Digital footprint, cyberbullying, and internet safety
- Clients and servers
- SQL queries and SQL injection
- Developer tools
For a deeper treatment of every topic, our complete guide to all six content areas expands on each one.
How the Exam Works
The meaning of the code is easier to appreciate once you see what sitting for the exam involves. All 45 questions are multiple choice, so there are no coding tasks or free-response answers to write. That said, multiple choice does not mean easy. Many questions ask you to apply a concept, such as working out what a Caesar cipher shift produces or spotting which scenario illustrates a breach of confidentiality.
What the Question Style Rewards
- Scenario recognition: identifying a phishing attempt or ransomware behavior from a short description
- Concept matching: pairing a term like DNS hierarchy or packet with its role
- Applied reasoning: decrypting a short message, or reading a simple SQL query and predicting its result
With 90 minutes for 45 questions, you have two minutes per question on average, which is generous for most items. The practical challenge is breadth: six areas spanning ethics, ciphers, networking, hardware, and databases. If you are wondering how demanding that breadth feels in practice, read how hard the CHS-CY1 exam is, and if you want a look at what the data says about outcomes, see the pass rate discussion (which is candid about what is and is not published).
Key Takeaway
Because CodeHS publishes no domain weights, do not skip a domain on a hunch that it is "light." A balanced pass through all six areas is safer than over-investing in your favorite one.
What CHS-CY1 Does Not Mean
Short alphanumeric codes get recycled across the certification landscape, and it is easy to land on the wrong page. To keep expectations accurate, here is what this credential is and is not.
| Question | Answer for CodeHS CHS-CY1 |
|---|---|
| Who issues it? | CodeHS |
| What level is it? | Cybersecurity Level 1, an entry-level exam |
| Does it include Level 2 topics? | No, Level 2 is a separate credential |
| Are there prerequisites? | No |
| Are domain weights published? | No, six topic headings are listed without percentages |
If a page you find discusses exam fees, pass-rate percentages, or domain weights for something called CHS-CY1, verify that it is about the CodeHS exam before trusting it. The official sources are the CodeHS Cybersecurity Level 1 Certification overview and the CodeHS Certifications FAQ. You can also read our dedicated explainers: what does CHS-CY1 mean, what is a CHS-CY1, and what is CHS-CY1 certification.
Who Takes It and Who Hires for It
CodeHS is widely used in classrooms, so the typical candidate is a student, often in a high school or early college setting, who has worked through cybersecurity coursework and wants a recognized credential to show for it. CodeHS recommends its Fundamentals of Cybersecurity course as preparation, though it states there are no prerequisites, so self-directed learners can sit the exam too.
Realistic Value
Level 1 is a foundational credential. It is best understood as proof of baseline literacy: you know the vocabulary, the common threats, how networks route traffic, and why SQL injection is dangerous. It signals readiness to keep learning rather than qualification for a senior security role.
- Students: a résumé line and portfolio item that shows initiative in a technical field
- Career explorers: a low-barrier way to test interest before committing to deeper certifications
- Educators and programs: a measurable outcome for cybersecurity pathways
We avoid quoting salary numbers because none are published for this credential. For an honest look at where it can lead, see the pages on CHS-CY1 jobs, the salary guide, and whether the certification is worth it.
Mapping Your Prep to the Domains
You do not need an elaborate system for an exam of this size, but sequencing the six domains sensibly makes a difference. A simple order moves from concepts you can read, to concepts you must practice, to concepts that build on earlier ones.
Cybersecurity Essentials and Digital Safety
- Learn the CIA Triad and map each threat (ransomware, phishing) to the principle it violates
- Review digital footprint, cyberbullying, and internet safety scenarios
Cryptography
- Work Caesar and Vigenere examples by hand until shifts feel automatic
- Practice explaining brute force vs. frequency analysis in your own words
IT Concepts and IT Infrastructure
- Trace how a request moves through DNS, routing, and packets
- Sort hardware into internal components, peripherals, storage, and network devices
System Administration, SQL, and Review
- Practice basic command line tasks and software license types
- Read SQL queries and spot injection patterns, then take full practice tests
Placing cryptography early works well because it is hands-on and builds confidence. Saving SQL and system administration for last lets you review them closest to exam day, when you can combine them with full-length practice. For a fuller plan, use the CHS-CY1 study guide, keep the one-page cheat sheet handy for last-minute review, and check training options if you want structured instruction. When you are ready to test yourself, try the CHS-CY1 practice tests and use the results to see which domains need another pass. Scheduling details are covered in the exam dates guide.
Frequently Asked Questions
CHS-CY1 refers to CodeHS Cybersecurity Level 1. It is the code for the entry-level cybersecurity certification exam issued by CodeHS.
The exam has 45 multiple-choice questions and is timed at 90 minutes, according to the CodeHS Certifications FAQ. It is delivered online.
CodeHS states the passing score is 60% for all certification exams except Java. Applied to 45 questions, that tells you roughly how many you need to answer correctly.
No. CodeHS states there are no prerequisites, though it recommends the Fundamentals of Cybersecurity course as preparation. Each exam attempt requires a new voucher.
CodeHS states that certification credentials expire after 10 years. Check the current CodeHS certification pages for any updates to that policy.
In short, CHS-CY1 is the label for CodeHS Cybersecurity Level 1: a focused, 45-question exam covering six foundational areas. Knowing what the code means is the first step, and the rest is a matter of working through those six domains methodically.