- The Honest Difficulty Verdict
- What You Are Actually Facing: Format and Scoring
- Difficulty Domain by Domain
- The Topics That Trip Candidates Up
- Skills You Must Be Able to Apply, Not Just Recognize
- What Makes It Easier or Harder for You
- A Domain-Ordered Prep Plan
- Attempts, Vouchers, and Credential Lifespan
- Who This Exam Suits and Where It Leads
- Frequently Asked Questions
- The exam is 45 multiple-choice questions in a 90-minute online timed session, so pacing is rarely the problem.
- The passing score is 60%, which means you can miss roughly 18 of 45 questions and still pass.
- CodeHS publishes six topic areas but no percentage weights, so study all six rather than gambling on one.
- There are no prerequisites, and CodeHS recommends its Fundamentals of Cybersecurity course as the preparation path.
The Honest Difficulty Verdict
The CodeHS Cybersecurity Level 1 exam (CHS-CY1) is an entry-level credential, and its difficulty reflects that. It is not designed to filter out all but the most experienced professionals. It is designed to confirm that a learner who has worked through foundational cybersecurity material can recognize core concepts, vocabulary, and basic techniques across six topic areas.
That said, "entry-level" does not mean "effortless." The exam is broad. It moves from ransomware and phishing to Caesar ciphers, from IPv6 addressing to SQL injection, and from peripheral devices to browser developer tools. Candidates rarely fail because a single question is impossibly deep. They fail because they studied three areas thoroughly and walked into the other three cold.
If you want a broader overview of what the credential covers before judging its difficulty, the guide to what the CHS-CY1 certification is is a good starting point, and the complete guide to all 6 content areas breaks down each domain in more detail.
What You Are Actually Facing: Format and Scoring
Understanding the mechanics removes a lot of anxiety, because several features of this exam work in the candidate's favor.
| Exam Feature | CHS-CY1 Detail | What It Means for Difficulty |
|---|---|---|
| Question count | 45 multiple-choice questions | Manageable volume; every question counts roughly 2.2% of your score |
| Time limit | 90 minutes, online and timed | About two minutes per question, which is generous for recognition-style items |
| Passing score | 60% (per the CodeHS Certifications FAQ) | Forgiving threshold compared with many professional certifications |
| Prerequisites | None | Anyone can attempt it, so preparation quality determines the result |
| Retakes | New voucher required for each attempt | Failing has a real cost, which raises the stakes of preparing properly |
| Topic weights | Six topic areas, no published percentages | You cannot safely skip any domain |
Ninety minutes for 45 questions is a comfortable ratio. Most candidates who know the material finish with time to review flagged items. If you have been worried about running out of time, that worry is usually misplaced. A more useful concern is making sure you do not rush through straightforward questions and lose points to misreading.
For a deeper look at the scoring threshold, see the explainer on the CHS-CY1 passing score, and for an honest look at what is and is not known about outcomes, the CHS-CY1 pass rate analysis. Note that CodeHS does not publish a pass rate in the sources used for this guide, so any site claiming a precise figure should be treated skeptically.
Difficulty Domain by Domain
Because the six topic areas are not equally easy for every candidate, it helps to judge them individually. The ratings below describe how demanding each domain tends to be for a learner with no prior cybersecurity experience.
Domain 1: Cybersecurity Essentials
Generally the most approachable domain. It covers ransomware, phishing, Internet of Things, the CIA Triad, cyber ethics, credit and copyright, and legal versus illegal hacking.
- The CIA Triad (confidentiality, integrity, availability) shows up as a framework for classifying scenarios, so practice applying it, not just reciting it.
- Legal versus illegal hacking questions hinge on authorization and consent.
- Phishing and ransomware questions are usually scenario-based and reward common sense plus vocabulary.
Domain 2: Cryptography
The domain where candidates feel the most variation. It covers basic cryptography, code breaking, brute force, frequency analysis, the Caesar cipher, and the Vigenere cipher.
- You should be able to encrypt and decrypt with a Caesar shift by hand.
- Understand why frequency analysis defeats simple substitution but struggles against Vigenere.
- Know what brute force means and why key length matters.
Domain 3: System Administration
Moderate difficulty, with more practical flavor. It covers operating systems, software and software licenses, application security, browsers, system administration, and the command line.
- Command line questions reward actual hands-on familiarity with a terminal.
- Software license types are a vocabulary-heavy area worth memorizing precisely.
- Application security and browser topics tend to be conceptual.
Domain 4: IT Concepts
Often rated the most technical of the six for newcomers. It covers internet addresses, IPv4 and IPv6, the DNS hierarchy, routing, and packets and protocols.
- Know how IPv4 and IPv6 addresses differ in format and size.
- Be able to walk through how a DNS lookup moves through the hierarchy.
- Understand what a packet is and why protocols exist.
Domain 5: IT Infrastructure
Moderate, with a lot of terminology. It covers internal components, peripheral devices, network devices, storage options, network options, network communication, and network management.
- Distinguish network devices by function (for example, what a router does versus a switch).
- Compare storage options by characteristics rather than memorizing lists.
- Expect questions that ask you to match a device or option to a scenario.
Domain 6: Digital Safety and Data Security
Mixed difficulty, because it blends soft and technical topics. It covers digital footprint, cyberbullying, internet safety, clients and servers, SQL queries, SQL injection, and developer tools.
- The SQL material is the technical core: read a basic query and understand what it returns.
- SQL injection questions test whether you can recognize unsafe input handling.
- Digital footprint and cyberbullying questions are usually the easier points to bank.
The Topics That Trip Candidates Up
Across the six domains, a handful of topics tend to generate the most uncertainty. None are advanced, but each requires deliberate practice rather than passive reading.
Vigenere versus Caesar
Candidates often blur these two together. The Caesar cipher uses a single fixed shift, which makes it vulnerable to both brute force (only a small number of possible keys) and frequency analysis. The Vigenere cipher uses a repeating keyword, so different letters shift by different amounts, which flattens the letter-frequency pattern that frequency analysis depends on. If you can explain that difference in a sentence, you are in good shape.
IPv4, IPv6, and DNS in one mental model
Domain 4 tends to feel abstract until you connect the pieces: a human types a name, DNS resolves it to an address, and routing carries packets toward that address. Studying these as a connected flow, instead of as three separate topics, makes the questions much easier to reason through.
SQL injection
This is the topic where reading about it is not enough. You should be able to look at a simple query that incorporates user input and recognize how an attacker could alter its meaning. Pair the concept with a basic understanding of SELECT statements so the attack logic makes sense.
Network devices and options
Domain 5 contains a lot of similar-sounding hardware and connectivity terms. The failure mode here is memorizing definitions without being able to choose between them in context. Practice with scenario-style questions, not flashcards alone.
Skills You Must Be Able to Apply, Not Just Recognize
Even in a multiple-choice format, a few topics reward real hands-on experience. Candidates who have actually done these things find the corresponding questions noticeably easier.
- Shifting letters with a Caesar cipher: Do a few by hand until it is automatic.
- Using a command line: Navigate directories, list files, and run basic commands so that terminal questions feel familiar.
- Reading a basic SQL query: Trace what a SELECT with a WHERE clause returns.
- Opening browser developer tools: Know what the tool is for and what kinds of information it exposes.
- Tracing a request: Describe how a browser request travels through DNS, routing, and a server.
The recommended preparation path from CodeHS is its Fundamentals of Cybersecurity course, which is designed around exactly this kind of applied learning. For a step-by-step approach to using it, the CHS-CY1 study guide walks through a first-attempt strategy, and the one-page cheat sheet is useful for a final review pass.
What Makes It Easier or Harder for You
Your personal difficulty depends heavily on your starting point. The table below maps common backgrounds to the domains where they usually have an edge or a gap.
| Your Background | Likely Strength | Likely Gap |
|---|---|---|
| Programming coursework | SQL queries, developer tools, command line | Networking hardware and infrastructure terms |
| Networking or IT hobbyist | IP addressing, DNS, network devices | Cryptography and legal/ethical topics |
| Math-oriented student | Caesar, Vigenere, frequency analysis | Software licensing and system administration vocabulary |
| Complete beginner | Digital safety, phishing, cyber ethics | Domains 3 through 5, which need the most new vocabulary |
Notice that there is no background that covers all six domains comfortably. That is by design: the exam is meant to confirm well-rounded foundational knowledge. If you are unsure whether you meet the eligibility conditions, the CHS-CY1 requirements guide confirms that there are no prerequisites to sit the exam.
A Domain-Ordered Prep Plan
Rather than a generic schedule, the most effective approach is to order your study by how much each domain depends on the others. Start with the easy points to build confidence, then move to the technical foundation, then finish with the connected topics.
Cybersecurity Essentials and Digital Safety
- Cover phishing, ransomware, the CIA Triad, and legal versus illegal hacking.
- Add digital footprint, cyberbullying, and internet safety from Domain 6.
- These are your quickest wins and set the vocabulary for everything else.
Cryptography
- Work Caesar and Vigenere examples by hand.
- Practice explaining why frequency analysis works on one and struggles with the other.
- Cover brute force and key length.
IT Concepts and IT Infrastructure
- Build the DNS-to-routing-to-packet mental model first.
- Then layer on network devices, storage options, and network management.
- This is the densest vocabulary block, so give it the most time.
System Administration, SQL, and Full Review
- Practice command line basics and software license types.
- Finish Domain 6 with SQL queries, SQL injection, and developer tools.
- Take full-length timed practice sets to find remaining weak spots.
Timed practice matters more than reading time in the final week. The CHS-CY1 practice test lets you rehearse the 45-question format so that the real session feels familiar, and reviewing which domains cost you points tells you where to spend your last few study sessions.
Key Takeaway
Because CodeHS does not publish domain weights, treat all six areas as equally testable. A candidate who is solid across all six will clear a 60% threshold far more reliably than one who is excellent in two and weak in four.
Attempts, Vouchers, and Credential Lifespan
One factor that quietly raises the effective difficulty is the voucher structure. CodeHS requires a new voucher for each exam attempt, so a retake is not free. That makes it worth preparing thoroughly before your first sitting rather than treating the first attempt as a trial run.
On the positive side, CodeHS states that certification credentials expire after 10 years, which is a long validity window for an entry-level credential. You are not facing frequent recertification pressure once you pass.
Specific voucher pricing is not published in the sources used for this guide, so confirm current details directly with CodeHS. For context on how to think about the financial side, the CHS-CY1 certification cost breakdown explains what is and is not publicly stated, and the exam dates and scheduling guide covers how to plan your attempt.
Who This Exam Suits and Where It Leads
CHS-CY1 is best suited to students and early learners who want a verifiable credential showing they have mastered foundational cybersecurity concepts. It is commonly pursued alongside the CodeHS Fundamentals of Cybersecurity course, which makes it a natural fit for high school and early college learners building a technical portfolio.
It is worth being realistic about what it does and does not do. The credential demonstrates foundational literacy, not job-ready expertise, and it is a starting point rather than a destination. If you are weighing the investment, the ROI analysis takes a measured look at the value, and the CHS-CY1 jobs overview discusses the kinds of pathways foundational credentials can support. Earnings data specific to this credential is not published, so treat any precise salary claims with caution.
This exam covers Cybersecurity Level 1 content only. It should not be confused with Cybersecurity Level 2 topics, which are a separate scope.
Frequently Asked Questions
It is moderately challenging for complete beginners, mainly because of its breadth across six domains rather than the depth of any one topic. With a 60% passing score and no prerequisites, a learner who completes the recommended CodeHS Fundamentals of Cybersecurity course and practices across all domains is well positioned to pass.
The exam has 45 multiple-choice questions and a 60% passing score, so you need 27 correct answers. That means you can miss up to 18 questions and still pass, though aiming well above the minimum gives you a safety margin.
It depends on your background, but newcomers most often find IT Concepts (IP addressing, DNS, routing, packets and protocols) and the SQL material in Digital Safety and Data Security the most demanding. Programmers tend to find networking hardware harder, while networking hobbyists often struggle more with cryptography.
Generally yes. You have 90 minutes for 45 multiple-choice questions, which is roughly two minutes per question. Most recognition-style items take far less, leaving time to review flagged questions at the end.
You can retake the exam, but CodeHS requires a new voucher for each attempt. Because of that added cost, it is wise to use timed practice tests to confirm you are consistently scoring comfortably above 60% in every domain before booking your first sitting.