The interviewer asks: "What does 'shift-left security' mean and how have you implemented it?" Which answer best demonstrates DevSecOps practice?
Option B is strongest because it defines shift-left precisely (SDLC integration at each stage) and provides concrete tooling at each layer: IDE → pre-commit → CI pipeline. Key structure: IDE plugins → pre-commit hooks → SAST/SCA in CI → threat modelling at design phase → remediation cost metric. Option A describes a single gate (before production) which misses the "left" point. Option C confuses a process change with a tooling/architectural change. Option D confuses responsibility distribution with shift-left.
2 / 14
The interviewer asks: "What is the difference between SAST and DAST, and when do you use each?" Which answer best demonstrates security testing knowledge?
Option B correctly reverses the order of A's definition, names the vulnerability classes each finds, and provides tooling for each. Key structure: SAST = static → CI → SonarQube/Semgrep; DAST = dynamic → staging → ZAP/Burp Suite; combined coverage = code + runtime. Option A completely reverses the definitions. Option C is a false dichotomy. Option D is incorrect — pen testing and SAST/DAST are related but distinct practices.
3 / 14
The interviewer asks: "How do you secure container images in a production Kubernetes environment?" Which answer best demonstrates container security depth?
Option B is strongest because it covers all five security layers in the container lifecycle: build (image hardening), CI (scanning), admission (policy enforcement), runtime (anomaly detection), and network (segmentation). Key structure: distroless → digest pinning → Trivy in CI → OPA/Kyverno admission → Falco runtime → network policies → Cosign signing. Option A is dangerous — "latest" tag is unpredictable and can introduce regressions. Option C is reactive (weekly) and misses in-cluster protection. Option D names tools but lacks architectural depth.
4 / 14
The interviewer asks: "What is compliance-as-code and which tools have you used?" Which answer best demonstrates policy automation maturity?
Option B is strongest because it defines the concept precisely (policies as code, enforced automatically), names tools at each layer (IaC, Kubernetes, cloud), and connects to audit requirements (SOC 2, ISO 27001). Key structure: Checkov (IaC) → OPA/Conftest (K8s manifests) → AWS Config/Azure Policy (cloud) → Git-versioned policies → audit trail. Option A confuses documentation-as-code with policy-as-code. Option C describes manual checklist compliance (the opposite of automation). Option D misdefines the concept entirely.
5 / 14
The interviewer asks: "How do you handle secrets management in a CI/CD pipeline?" Which answer best demonstrates production-grade secrets hygiene?
Option B is strongest because it addresses secrets at every stage: pre-commit (scanning), CI/CD (OIDC, no stored keys), runtime (Vault/Secrets Manager injection), and operational (rotation + audit). Key structure: Gitleaks pre-commit → OIDC no static keys → Vault/Secrets Manager injection → dynamic credentials → audit logging. Option A stores secrets in CI env vars — they are visible in logs and to CI admins. Option C uses .env files which are manually shared (no rotation, no audit). Option D — base64 is encoding, not encryption — a critical misconception.
6 / 14
Sarah from the security team just posted this Slack message: 'We're seeing a high number of failed attempts to access the database using default credentials. Should we immediately block all IPs?' Which response best reflects a DevSecOps engineer's approach?
This scenario tests understanding of proactive security. Blocking all IPs is a blunt instrument that could disrupt legitimate operations. A DevSecOps engineer would prioritize investigation and remediation, aiming for a targeted solution rather than a sweeping one. The correct answer emphasizes identifying the root cause before taking drastic action.
7 / 14
Mark, during a code review, comments on your PR: 'This endpoint doesn't handle rate limiting. An attacker could easily overwhelm the system.' Which of the following is the MOST appropriate response to Mark's comment?
This question evaluates a developer's responsiveness to security feedback. Simply dismissing the concern or deferring it isn't acceptable. A DevSecOps engineer would immediately acknowledge the vulnerability and propose a concrete solution, demonstrating commitment to secure coding practices. The token bucket algorithm is a common and effective rate limiting technique.
8 / 14
David from the infrastructure team sent this message in Slack: 'We've just deployed a new version of the API. Can you confirm it's running on port 8080?' Which response best demonstrates a DevSecOps engineer's approach to validating the deployment?
The key here is proactive monitoring. Simply confirming availability isn't enough; a DevSecOps engineer would immediately consider potential security implications and establish baseline metrics for traffic patterns. Option 1 demonstrates this by suggesting continuous observation – crucial for detecting anomalies that could signal an attack.
9 / 14
Liam, during a code review of your PR for a new microservice, states: 'I'm concerned about the lack of input validation on this endpoint. A malicious user could inject SQL through the `username` parameter.' Which action is MOST appropriate to take in response?
Liam's comment highlights a critical vulnerability. The correct response involves immediate action—implementing parameterized queries is the standard defense against SQL injection. Options 1 and 3 demonstrate a lack of urgency and security awareness, while option 2 acknowledges the risk but doesn't prioritize mitigation.
10 / 14
David from the DevSecOps team is reviewing a PR for a new web application. He notes: 'The application doesn't currently implement any input sanitization. This could lead to Cross-Site Scripting (XSS) vulnerabilities.' Which of the following actions should David prioritize during this review?
While server-side validation and output encoding are crucial for preventing XSS, a simple blacklist provides an immediate, albeit limited, defense. A CSP header offers a more robust layered approach, controlling resource loading and reducing the impact of successful attacks. Deferring until deployment is not a proactive security measure; it simply postpones addressing the vulnerability. This option demonstrates understanding of basic mitigation strategies.
11 / 14
Maria, a DevSecOps engineer, is drafting an update for a daily standup meeting. She states: 'We've recently integrated SonarQube into our CI pipeline to automatically scan code for security vulnerabilities and coding standard violations.' Which of the following best describes Maria's contribution to the team's DevSecOps practices?
The key here is 'shift-left'. Integrating static analysis tools like SonarQube into CI allows for vulnerability detection *before* code reaches production. While fixing vulnerabilities is part of the process, Maria's statement highlights the proactive element of this approach—it's not just about remediation; it's about prevention.
12 / 14
Ben is reviewing a PR for a new API endpoint. The developer has included a JSON response with the following structure:
```json
{
"status": "success",
"data": {
"user_id": 12345,
"username": "john.doe"
}
}
```
He asks: 'How should we ensure the `username` field is properly sanitized to prevent potential injection attacks?' Which of the following is the MOST appropriate response?
While regular expressions and URL encoding have their place, a whitelist approach is the most secure. By explicitly defining the acceptable characters and formats for the `username`, you prevent *any* potentially malicious input from reaching the database. Trusting the client is risky; it assumes proper sanitization which isn't guaranteed.
13 / 14
Chloe, a DevSecOps engineer, is investigating a security alert from an automated vulnerability scanner. The scan identified a critical SQL injection vulnerability in a legacy application. She decides to implement parameterized queries to mitigate the risk. Which of the following best describes Chloe's approach?
Parameterization prevents SQL injection by treating user input as data rather than executable code. It's a fundamental secure coding practice directly addressing the vulnerability. While defense-in-depth and layering controls are good principles, Chloe's action is the most direct response to *this* particular issue. Patching only addresses the symptom; parameterization fixes the root cause.
14 / 14
David, a DevSecOps engineer, is explaining the concept of 'Infrastructure as Code' (IaC) to a junior developer. He states: 'We use Terraform to define and manage our cloud infrastructure – including security groups and network configurations – as code. This allows us to automatically enforce consistent security policies across all environments.' Which statement BEST reflects David's understanding?
The core benefit of IaC is its ability to treat infrastructure (including security) as code. This provides version control, auditability, and repeatability – crucial elements for consistent security policies across environments. While beneficial for larger organizations, it's not limited to them. IaC doesn't eliminate manual reviews; it automates them.
What does "DevSecOps Engineer Interview Questions" cover?
Practice answering DevSecOps Engineer interview questions in professional English. 5 exercises covering SAST/DAST, shift-left security, container security, compliance-as-code, and threat modelling.
How many questions are in this interview set?
This set has 14 exercises, each with a full explanation.
Is this exercise free to use?
Yes. Every exercise on CoderSlingo, including this one, is free to use with no account, sign-up, or paywall.
Do these exercises include model answers?
Yes. Each interview question gives you several possible responses and asks you to pick the one that communicates most clearly and completely — the explanation then breaks down exactly why that answer works, including the specific vocabulary a strong candidate would use.
What if I choose an answer that isn't the strongest one?
You'll see which option was correct and read a full explanation of why it's stronger than the alternatives, plus the key vocabulary and phrasing worth reusing in a real interview.
Can I retry the questions?
Yes — use the "Try again" button on the results screen to reset and go through the set again.
Is this the same as a real technical or behavioural interview?
No — it's focused practice for the language side of interviewing: recognising which phrasing sounds precise and confident versus vague, and knowing the vocabulary interviewers expect for this role. It won't replace mock interviews, but it builds the vocabulary you'll need in one.
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Who writes these interview questions?
Every question is written by the CoderSlingo team based on real technical interview patterns for this role, then reviewed for accuracy and clarity.