Implementation
Turn a clear written spec into correct code: strings, arrays, loops and conditions, with every rule in the spec handled.
Tip: Clear the easier questions quickly. Every minute saved is a minute for the hardest one.
Coding assessment guide · Checked November 3, 2026
The CodeSignal Assessment: GCA Format, Score and Rules
The CodeSignal General Coding Assessment (GCA) is a proctored coding test with 4 questions of rising difficulty in 70 minutes, taken in one sitting. You can answer in any order and submit as often as you like; your best submission counts. Certified results are scored from 200 to 600, you can see your score, and you can share a verified result with other companies instead of retaking. Proctoring records your camera, microphone and screen, and companies can turn on CodeSignal's own AI assistant.
CodeSignal assessment at a glance
Facts from CodeSignal's own pages, checked November 3, 2026. Employers can change settings, so your invitation email wins if it says something different.
| Most common test | General Coding Assessment (GCA): 4 questions, 70 minutes, one sitting |
|---|---|
| Other certified test | Industry Coding Assessment (ICA): one project question with 4 levels, up to 90 minutes |
| Order and submissions | Any order; submit as often as you like, the best submission counts |
| Test cases | Sample tests are visible; Submit runs the full suite, including hidden cases |
| Score | 200 to 600 on certified assessments; no official passing score |
| Your score | Visible in your account for certified assessments; custom company tests usually hide it |
| Sharing | Share a verified result with other companies; each company sets how old it can be (6 months by default, up to 3 years) |
| Retakes | Limited per test type and only with a new invite, for example at most 2 in 30 days and 3 in 180 days |
| Proctoring | Camera, microphone and screen recorded, plus a government photo ID, reviewed by CodeSignal |
| Integrity flags | A per-question Suspicion Score and an "Integrity Flagged" status for the employer |
| Built-in AI | Companies can turn on CodeSignal's own assistant, Cosmo, which will not hand out solutions |
| Languages | 38 listed for the GCA, including Python 3, Java, C++, JavaScript and Go |
| Device | Laptop or desktop; proctored tests cannot be taken on phones or tablets |
| Free practice | CodeSignal's practice assessments; companies cannot see your activity |
CodeSignal assessment question types
CodeSignal says the GCA's 4 questions vary in difficulty and focus on implementation and problem solving. These are the skills that covers.
Simulation and data manipulation
Follow a set of rules step by step, for example moving through a grid or updating a list as events arrive.
Tip: Write a small helper for each rule instead of one long function. It makes off-by-one bugs easier to spot.
Problem solving and efficiency
Pick a data structure (hash maps, sets, sorting, two pointers) that keeps your code fast enough for large hidden test cases.
Tip: Get a correct brute force passing and submit it, then optimize. Points come from test cases passed, so a partial solution still scores.
Industry Coding Assessment (project)
One project-style question built in 4 levels, each extending the last, up to 90 minutes.
Tip: Keep your code easy to extend. Each level builds on what you wrote before.
How CodeSignal scores work
Certified assessments report an Assessment Score from 200 to 600. Points come from the test cases your submissions pass, and bonus points come only from fully solving a group of questions. CodeSignal publishes no passing score; each company sets its own bar.
Proctored results are verified by CodeSignal within 1 to 3 business days and then sent to the company. You can see certified scores in your CodeSignal account and share an eligible result with other companies instead of retaking. Each company decides how old a shared result can be: 6 months by default, up to 3 years.
Retakes are limited by test type and always need a new invitation. CodeSignal's cooldown rules work out to, for example, at most 2 attempts in 30 days and 3 in 180 days for some tests; the Industry Coding Assessment allows 2 attempts in 180 days.
How to prepare for the CodeSignal assessment
- Step 1
Do CodeSignal's free practice assessments
They use the same editor and question style, and companies cannot see your activity. Do at least one full timed run of 4 questions in 70 minutes.
- Step 2
Practice the four-question pace
Aim to clear the first two questions quickly so the last two get most of the time. Submit early and often: your best submission counts.
- Step 3
Drill arrays, strings, grids and hash maps
Practice simulating step-by-step processes cleanly and choosing the right data structure, since the GCA tests implementation as well as problem solving.
- Step 4
Prepare the room for proctoring
Use a laptop or desktop with Chrome, Firefox or Edge, have your photo ID ready, close other apps and make sure nobody else is in the room.
Want problems to work through? CodeSignal practice test: 8 GCA-style questions
Is the CodeSignal assessment proctored, and can it detect cheating?
Proctored CodeSignal assessments record your camera, microphone and screen for the whole session, and you show a government photo ID first. CodeSignal's team reviews the recording and says it deletes it within 15 days without sharing it with the company.
Employers also see a Suspicion Score for each question, built from signals like code similarity, pasting, copying the question text and session replay, and an "Integrity Flagged" status when CodeSignal finds a problem.
Companies can turn on CodeSignal's own AI assistant, Cosmo, which will not hand out solutions, and some newer AI-assisted assessments include it up front.
CodeSignal assessment answers, AI help and cheating
Are there CodeSignal GCA answers online?
Lists of "GCA questions" circulate online, but your score depends on passing CodeSignal's full hidden test suite for the exact questions you get, and the Suspicion Score looks at code similarity. Coding Copilot reads the problem on your screen and writes a solution for it.
How does OphyAI work in a CodeSignal interview?
Coding Copilot in the OphyAI desktop app works during live coding interviews: it transcribes the spoken question, reads the problem on screen with one hotkey, and shows an approach, complexity notes and working code in a window hidden from screen sharing. It does not hide from a webcam or from CodeSignal's own checks.
Can AI help on the CodeSignal GCA?
Coding Copilot in the OphyAI desktop app reads a GCA problem on your screen with Cmd/Ctrl + Shift + A and returns an approach, complexity notes and working code in an overlay that screen sharing and recording leave out. It is not hidden from the webcam that the proctored GCA records. Separately, companies can turn on CodeSignal's own assistant, Cosmo, which will not hand out solutions.
Can CodeSignal detect cheating?
Proctored tests record your camera, microphone and screen, and you show a photo ID. Employers also see a Suspicion Score built from code similarity, pasting and session replay, and an Integrity Flagged status if CodeSignal finds a problem. The OphyAI window is hidden from screen sharing and recording, but not from a webcam, a person watching, or the platform's own keystroke, paste and tab tracking.
Compare every platform: Can online assessments detect AI?
OphyAI Desktop for Mac and Windows
OphyAI Coding Copilot and the CodeSignal assessment
Coding Copilot in the OphyAI desktop app reads the coding problem on your screen with one hotkey and returns an approach, complexity notes and working code in your language.
Use OphyAI Coding Copilot in your CodeSignal interviews, not just to practice. In a live CodeSignal interview, press Space or Cmd/Ctrl + Shift + L and it transcribes the question your interviewer asks out loud; press Cmd/Ctrl + Shift + A and it reads the problem on your screen. The approach, complexity notes and working code appear as a card in a floating overlay that your screen share leaves out, on top of a full-screen editor and without taking the keyboard from it. Follow-ups remember the problem, so "now make it faster" updates the same code.
On the proctored General Coding Assessment, CodeSignal records your camera, microphone and screen and checks your ID. Coding Copilot reads GCA problems with the same Cmd/Ctrl + Shift + A hotkey.
Cmd/Ctrl + Shift + A snaps the problem window, even when other windows cover it, and Cmd/Ctrl + Shift + S lets you drag a box around part of the screen. In a live interview, Space or Cmd/Ctrl + Shift + L transcribes the question the interviewer asks out loud.
Answers show as a card in a floating overlay that macOS and Windows leave out of screen sharing and recording. It stays on top of a full-screen editor or browser and opens without taking the keyboard from your editor.
Each answer card shows how OphyAI read the problem, what to say first, the code with line numbers, a dry run with edge cases, and the Big O. Follow-ups remember the problem, so "now handle duplicates" updates the same code.
Free download. Coding Interview is on the Premium plan ($59 a month, 500 credits) and uses 15 credits per session. See everything it does
What it is hidden from, and what it is not
Hiding a window from screen share does not hide it from a webcam, a person watching, keystroke and paste history, tab or focus tracking, or proctoring software.
CodeSignal assessment questions
The General Coding Assessment is 4 questions in 70 minutes, in one sitting, unless the company sets a different time. The Industry Coding Assessment runs up to 90 minutes.
There is no official passing score. Certified scores run from 200 to 600, and each company sets its own target for the role.
Yes, for certified assessments. You can share an eligible verified result instead of retaking; each company decides how old a result it will accept.
It depends on the test type and always needs a new invite. Some tests allow at most 2 attempts in 30 days and 3 in 180 days; the Industry Coding Assessment allows 2 in 180 days.
Yes. You can do the GCA questions in any order, your draft code is saved, and your highest-scoring submission is the one that counts.
For most CodeSignal assessments, no. You code in CodeSignal's built-in editor.
Sources
Read on November 3, 2026. CodeSignal General Coding Assessment (GCA) and Certified Assessments is a product of CodeSignal; OphyAI is not affiliated with CodeSignal.
- CodeSignal: GCA structure
- CodeSignal: GCA rules and setup
- CodeSignal: Industry Coding Assessment rules
- CodeSignal: understanding Assessment Score
- CodeSignal: cooldown periods
- CodeSignal: sharing results with employers
- CodeSignal: what proctoring is and how it works
- CodeSignal: Suspicion Score
- CodeSignal: browsers and devices
- CodeSignal: free practice
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Walk into the CodeSignal assessment prepared
Download OphyAI Desktop and bring Coding Copilot into your next coding interview: it hears the question, reads the problem, and shows the approach and code in an overlay your screen share leaves out.