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Does CodeSignal Detect a Second Monitor? Screen Sharing, Proctoring, and Integrity Flags
Does CodeSignal detect a second monitor? Learn what screen sharing, proctoring, single-monitor rules, and integrity flags actually mean.
If you are taking a CodeSignal assessment, the honest answer to “Does CodeSignal detect a second monitor?” is sometimes, but the public documentation does not promise a universal second-monitor detector for every assessment. What CodeSignal does document is more concrete: some assessments use proctoring, candidates may have to share their screen, camera, and microphone, and the session can be reviewed for rule violations. The instructions shown before your own assessment control what is permitted.
For a proctored CodeSignal assessment, use one computer, one visible monitor, no unrelated apps or tabs, and the exact screen-sharing choice requested by the setup flow. If you need an external display, ask the hiring company or CodeSignal support before starting.
Quick answer: second monitor, screen sharing, and flags
| Situation | What CodeSignal publicly documents | Safe interpretation |
|---|---|---|
| Proctored assessment | Camera, microphone, and screen sharing can be required for the full evaluation; identity and the recording are reviewed | Assume the shared session is monitored and follow every displayed rule |
| Two monitors connected | CodeSignal’s general assessment help does not state that every proctored assessment automatically detects or blocks a second display | A second monitor is not automatically “approved”; ask before using it |
| Entire Screen selected | The screen-share setup can ask you to select Entire Screen, and the browser shows when CodeSignal is sharing | Share exactly what the prompt requests; do not choose a window to hide other activity |
| Single-monitor wording | CodeSignal documents a configurable single-monitor pledge for some live interview sessions | A live-interview setting is not proof that every online assessment has the same rule |
| Unrelated apps or tabs | The proctored assessment setup instructs candidates to close unrelated tabs, windows, and applications | Close them before sharing, and keep the workspace limited to allowed tools |
| Integrity review | Results can move through pending, verified, or rejected verification states | An integrity flag is a review signal, not a coding score or automatic explanation of what happened |
Does CodeSignal scan for a second monitor?
CodeSignal has not published a simple statement saying that every assessment scans the operating system for all connected displays. The candidate-facing proctoring guide describes screen sharing, camera and microphone capture, identity verification, and review of the rules displayed during setup. It does not give candidates a universal “second monitor allowed” or “second monitor blocked” rule.
That distinction matters because a shared screen and a connected screen are different things. A browser’s screen-share permission tells the browser which screen, window, or tab to capture. It does not automatically tell a candidate whether the assessment owner permits an additional display. A second monitor could be visible to a webcam, outside the shared surface, or covered by a local system setting; none of those possibilities should be treated as a guarantee that it is invisible or acceptable.
The safest conclusion is practical: if the assessment instructions say one monitor, use one monitor; if they do not say, ask before you begin. A recruiter or CodeSignal support agent can clarify a company-specific rule.
What CodeSignal proctoring can record
CodeSignal says some assessments include remote proctoring and identity verification. Before a proctored session, the candidate may be prompted to:
- share the screen for the duration of the evaluation;
- share camera and microphone access;
- show a valid government-issued photo ID;
- take a face photo; and
- acknowledge the assessment rules shown in the setup flow.
The proctoring team reviews whether the camera, microphone, and screenshare stayed available, whether the ID matches the candidate, and whether the displayed rules were followed. The timer does not begin until setup is complete.
The review may combine the selected screen recording, camera view, microphone, identity check, browser behavior, and the assessment’s specific rules. CodeSignal also documents other optional fraud signals, but that does not mean every assessment enables every safeguard or performs an operating-system scan.
Proctored and non-proctored assessments are different
Not every CodeSignal assessment uses the same controls. CodeSignal says candidates can see whether proctoring is required in the Assessments area before taking an evaluation. A non-proctored assessment may still have rules about outside help, copying, or allowed tools, but it does not necessarily collect the same camera, microphone, ID, and screen recording evidence.
Check the invitation and the first setup screen for clues:
| Prompt or label | What it usually means for your preparation |
|---|---|
| Proctoring required, camera, microphone, or ID | Plan for identity verification and a recorded session; use a quiet, uncluttered setup |
| Screen-share permission | The assessment expects the browser to receive a screen capture; select the surface requested by the prompt |
| Rules or pledge about tabs, apps, searches, or monitors | Treat those statements as binding for that evaluation |
| No proctoring or recording prompt | Do not invent a permission; read the assessment instructions and the employer’s email |
An employer can configure assessments differently. A screenshot or forum answer from another candidate is not a substitute for the rules in your invite.
Why “single monitor” appears in some CodeSignal documentation
CodeSignal’s documentation for creating live interview sessions describes configurable acknowledgements and sub-pledges. A customer can specify that an interviewee must close other tabs and apps, use a single monitor, or use only the CodeSignal IDE. With proctoring enabled, the interview configuration can add video, audio, and other session checks.
That is useful context, but it does not establish a blanket assessment policy. Live CodeSignal Interview and CodeSignal Assessments are different products and can have different settings. Follow the rules for the product in your invitation.
The defensible statement is that CodeSignal supports a single-monitor requirement in some configured interview workflows and expects candidates to follow the rules shown for their specific session.
What causes an integrity flag?
CodeSignal uses labels such as pending, verified, and not verified. Its support documentation gives examples of non-verification, including another person in the room, leaving the camera view, using other devices, an external IDE, or impermissible online help. A second monitor is not listed as a universal automatic rejection trigger.
That does not make it safe to use one secretly. The candidate must follow the specific rules displayed before the assessment. If those rules require a single monitor, an undisclosed second display could become part of a manual review even if no automated detector produced a dedicated “second monitor” event.
Also separate integrity from performance. CodeSignal says proctoring has no impact on the automatically calculated score. A verified result still does not guarantee that an employer will advance the candidate.
What the employer can see
CodeSignal’s current candidate-facing proctoring article says identification and proctoring data are reviewed by CodeSignal and are stored and deleted within 15 days; it says the requesting company receives the assessment result and score rather than the raw identity and proctoring data. Current customer documentation also describes proctoring-status filters and integrity context in assessment reports.
Those statements can coexist: a hiring team may receive a verification status or integrity decision without receiving the raw video, audio, ID image, or full screen recording. Do not promise candidates that an employer will see nothing; the report depends on the assessment configuration and current product policy.
If privacy matters, read the proctoring notice and privacy policy linked from the assessment. If you need an accommodation, ask before starting; CodeSignal says candidates without a government-issued ID can contact support about alternative identification.
A safe setup before the timer starts
Use this checklist before the deadline:
- Read the rules. Check monitor, tab, app, search, external-IDE, AI, calculator, and note restrictions.
- Use a supported computer. CodeSignal recommends an up-to-date Chrome, Firefox, or Edge browser and a laptop or desktop for proctored sessions.
- Choose one monitor by default. Disconnect or turn off an extra display unless it is explicitly approved.
- Close unrelated software. Quit messaging apps, remote-desktop tools, screen recorders, IDEs, extra browser windows, and overlays.
- Run permissions. Confirm camera, microphone, and screen-share access before the timed portion begins.
- Share the requested surface. If the prompt says Entire Screen, choose it and verify the browser sharing indicator.
- Keep the camera view stable. Stay visible and keep other people and devices away unless allowed.
- Document problems. Capture errors and contact CodeSignal support or the hiring company before restarting repeatedly.
The goal is to make the session match the rules you accepted.
What if you already used a second monitor?
Do not panic or create a second attempt just to change the recording. Identify what the invitation required, whether the assessment was proctored, and whether you received a pending, verified, or rejected result. If the rules expressly prohibited a second monitor, contact the hiring company or CodeSignal support with the assessment ID, submission time, and a concise explanation.
If the assessment never requested proctoring or screen sharing, the company may still have its own external-display policy. Ask the recruiter whether a review or new attempt is appropriate; the employer controls reissue decisions.
Practice without creating an integrity problem
Each complete title in the first column links to the question and solution.
| Question | Practice focus | How to use it |
|---|---|---|
| Find the Earliest Pair with a Target Sum | Hash maps and ordering | State the invariant, handle duplicate values, and test an empty input |
| Validate Properly Nested Brackets | Stack-based validation | Explain why each closing bracket must match the latest unmatched opener |
| Median of a Data Stream | Two heaps and streaming updates | Derive the balance invariant and state time and space complexity |
| Top K Frequent Values | Counting and selection | Compare sorting, a heap, and bucket-based approaches before coding |
| Make Progress When Requirements Are Ambiguous | Clarification and judgment | Practice a specific story about assumptions, trade-offs, and measurable results |
Frequently asked questions
Can CodeSignal see both of my monitors?
CodeSignal’s public assessment documentation does not promise a universal second-monitor detector. A proctored assessment can record the screen surface you share, camera, and microphone, and the session is reviewed against the displayed rules. Treat an undisclosed second monitor as risky and ask before using it.
Does selecting “Entire Screen” share every display?
The browser’s screen-share picker determines what is shared, and CodeSignal’s setup instructions may specifically request Entire Screen. Do not use that label to infer that every connected display is approved. Select the requested surface and follow the assessment rules.
Is one monitor always required for a CodeSignal OA?
No universal rule is published for every OA. Some CodeSignal live interview workflows can include a single-monitor pledge, while assessment requirements vary by configuration. Read the rules in your invite or ask the employer.
Will a second monitor lower my CodeSignal score?
CodeSignal says proctoring does not affect the automatically calculated score. A rule violation can still affect whether the result is verified or accepted, which is a separate decision from coding performance.
Can my employer watch the full recording?
Do not assume that. CodeSignal says raw identification and proctoring data are reviewed by CodeSignal, while customer reports can expose verification or integrity status. The exact report available depends on the assessment configuration and current product policy.
The practical answer
CodeSignal can record and review a proctored assessment’s shared screen, camera, microphone, identity check, and compliance with the rules shown before the timer starts. It does not publish a universal promise that every assessment detects every second monitor, and the existence of a single-monitor option in some live interviews does not automatically govern every OA.
Use one monitor by default, close unrelated software, share the requested surface, and ask before starting if your setup differs.
Sources and Further Reading
- CodeSignal: What is proctoring and how does it work?
- CodeSignal: I can’t share my screen. What do I do?
- CodeSignal: General Coding Assessment rules and setup
- CodeSignal: Taking an assessment on CodeSignal
- CodeSignal: Quick Start Guide for Assessments
- CodeSignal: Creating a new interview session
- CodeSignal: Which browsers and devices does CodeSignal support?
Research note: checked September 6, 2026. CodeSignal assessment controls are configurable by the assessment owner and can change. The rules shown in the candidate’s own invitation and setup flow control that session.