DevSecOps Interview Questions

Top DevSecOps interview questions and answers covering Secure SDLC, Shift Left Security, SAST, DAST, SCA, Container Security, Kubernetes Security, Supply Chain Security, SBOM, Zero Trust, SIEM, SOAR, and enterprise production scenarios.

Introduction

DevSecOps has become one of the most important skills for modern DevOps Engineers, Platform Engineers, Cloud Engineers, Security Engineers, SREs, and Solution Architects.

Interviewers expect candidates to understand not only security tools but also how security integrates throughout the software development lifecycle, CI/CD pipelines, Kubernetes platforms, cloud environments, and production systems.

This guide contains the most frequently asked enterprise DevSecOps interview questions.

Enterprise DevSecOps Architecture

flowchart LR

Developer --> GitHub --> CI

CI --> SAST

CI --> SCA

CI --> ContainerScan

CI --> IaCScan

CI --> ImageSigning

CI --> Registry

Registry --> ArgoCD

ArgoCD --> Kubernetes

Kubernetes --> Falco

Falco --> SIEM

SIEM --> SOC

DevSecOps Basics

1. What is DevSecOps?

Answer

DevSecOps integrates security into every phase of software development and operations.

Instead of performing security only before production deployment, security becomes part of

Development
Build
Testing
Deployment
Runtime
Monitoring

2. Why is DevSecOps important?

Benefits

Early Vulnerability Detection
Faster Releases
Reduced Risk
Automated Security
Better Compliance
Lower Cost

3. Difference between DevOps and DevSecOps?

DevOps	DevSecOps
Automation	Secure Automation
Faster Delivery	Secure Delivery
Security Later	Security Everywhere
Shared Operations	Shared Security Responsibility

Shift Left Security

4. What is Shift Left Security?

Security activities are performed earlier in the SDLC.

Examples

Secure Coding
SAST
Dependency Scanning
Secret Detection

Benefits

Faster Fixes
Lower Cost
Better Security

Secure SDLC

5. What is Secure SDLC?

Secure SDLC integrates security into every software development phase.

flowchart LR

Planning --> Design --> Development --> Testing --> Deployment --> Monitoring

Security activities include

Threat Modeling
Secure Coding
Security Testing
Monitoring

Security Testing

6. What is SAST?

Static Application Security Testing analyzes source code without executing the application.

Finds

SQL Injection
XSS
Hardcoded Secrets
Insecure Coding Patterns

Popular Tools

SonarQube
Checkmarx
Semgrep
Fortify

7. What is DAST?

Dynamic Application Security Testing scans a running application.

Finds

Authentication Issues
Runtime Vulnerabilities
API Security Problems

Popular Tools

OWASP ZAP
Burp Suite

8. Difference between SAST and DAST?

SAST	DAST
Source Code	Running Application
Early SDLC	After Deployment
White Box	Black Box
Fast Feedback	Runtime Testing

9. What is SCA?

Software Composition Analysis scans third-party libraries.

Detects

Vulnerable Dependencies
License Issues
Outdated Packages

Popular Tools

Snyk
Dependabot
Mend
OWASP Dependency-Check

Secrets Management

10. Why should secrets never be stored in Git?

Because repositories may expose

Passwords
API Keys
Tokens
Certificates

Use

HashiCorp Vault
AWS Secrets Manager
Azure Key Vault

Container Security

11. How do you secure Docker images?

Best Practices

Minimal Base Images
Scan Images
Run as Non-root
Remove Unused Packages
Sign Images

12. Which tools scan container images?

Examples

Trivy
Grype
Clair

Infrastructure Security

13. What is IaC Security?

Infrastructure as Code templates are scanned before deployment.

Checks

Public Storage Buckets
Open Security Groups
Weak IAM Policies
Encryption Disabled

Tools

Checkov
tfsec
Terrascan

Kubernetes Security

14. How do you secure Kubernetes?

Security Areas

RBAC
Network Policies
Secrets
Admission Controllers
Runtime Monitoring

15. What are Admission Controllers?

Admission Controllers validate requests before Kubernetes creates resources.

Examples

Gatekeeper
Kyverno

Policy as Code

16. What is Policy as Code?

Policies are written as code and automatically enforced.

Benefits

Automation
Compliance
Governance
Consistency

17. What is OPA?

Open Policy Agent validates security rules.

Example Policies

No Privileged Containers
Mandatory Labels
Resource Limits

18. Difference between OPA and Kyverno?

OPA	Kyverno
General Policy Engine	Kubernetes Native
Uses Rego	Uses YAML
Flexible	Easier Learning

Supply Chain Security

19. What is Software Supply Chain Security?

Protects

Source Code
Dependencies
Build Pipelines
Container Images
Registries

Goal

Only trusted software reaches production.

20. What is SBOM?

Software Bill of Materials.

Contains

Dependencies
Versions
Licenses
Components

Benefits

Compliance
Faster CVE Response
Supply Chain Visibility

21. What is Image Signing?

Digitally signs container images.

Benefits

Integrity
Authenticity
Tamper Detection

Popular Tool

Cosign

Runtime Security

22. What is Runtime Security?

Protects applications after deployment.

Detects

Container Escape
Privilege Escalation
Reverse Shells
Suspicious Processes

23. What is Falco?

Falco monitors Linux kernel events.

Detects

Shell Access
File Modifications
Privilege Escalation
Container Escape

Zero Trust

24. What is Zero Trust?

Security model based on

"Never Trust, Always Verify"

Principles

Identity Verification
Least Privilege
Continuous Authentication

Cloud Security

25. Which cloud security services have you used?

AWS

IAM
GuardDuty
Security Hub
Inspector
KMS

Azure

Defender for Cloud

Google Cloud

Security Command Center

SIEM & SOAR

26. What is SIEM?

Security Information and Event Management.

Collects

Logs
Events
Alerts
Audit Data

Examples

Splunk
Microsoft Sentinel
IBM QRadar

27. What is SOAR?

Security Orchestration, Automation and Response.

Automates

Incident Response
Alert Correlation
Ticket Creation
Threat Investigation

CI/CD Security

28. How do you secure a CI/CD pipeline?

Best Practices

Code Reviews
SAST
SCA
IaC Scanning
Image Scanning
Signed Artifacts
Least Privilege
Secrets Management

Production Scenarios

29. A build fails because of a critical vulnerability. What would you do?

Steps

Review Scan Report
Identify CVE
Upgrade Dependency
Rebuild
Verify Results

30. Container image contains critical vulnerabilities.

How do you fix it?

Update Base Image
Remove Unused Packages
Upgrade Dependencies
Scan Again
Redeploy

31. Developer accidentally committed AWS credentials to GitHub.

What are your immediate actions?

Revoke Credentials
Rotate Keys
Remove Secret from Repository History
Investigate Access Logs
Enable Secret Scanning

32. Kubernetes deployment was rejected.

Possible reasons

OPA Policy
Kyverno Validation
Missing Labels
Security Context Violation
Resource Limits Missing

33. Application passed SAST but failed DAST.

Why?

Because

SAST checks source code.

DAST tests runtime behavior.

34. Production container unexpectedly opened a shell.

How would you investigate?

Falco Alerts
Kubernetes Audit Logs
Container Logs
User Activity
SIEM Events

35. How would you design a secure enterprise CI/CD pipeline?

flowchart LR

Developer --> GitHub --> CodeReview --> SAST --> SCA --> IaCScan --> ContainerScan --> SBOM --> Cosign --> Registry --> ArgoCD --> Kubernetes --> Falco --> SIEM

Common DevSecOps Tools

Category	Tool
Source Control	GitHub
CI/CD	Jenkins
SAST	SonarQube
DAST	OWASP ZAP
SCA	Snyk
Secrets	Vault
Container Scan	Trivy
IaC Scan	Checkov
Policy	OPA
Kubernetes Policy	Kyverno
Runtime Security	Falco
Image Signing	Cosign
GitOps	Argo CD
SIEM	Splunk
SOAR	Cortex XSOAR

Production Best Practices

Shift Security Left
Secure Coding Standards
Scan Every Pull Request
Scan Dependencies
Scan Infrastructure as Code
Scan Container Images
Use Signed Images
Encrypt Secrets
Enable Runtime Monitoring
Automate Incident Response
Continuously Patch Vulnerabilities

Real-World Example

A banking application is deployed to Amazon EKS.

Workflow

Developers submit code to GitHub.
Pull Requests trigger SonarQube SAST and Snyk dependency scanning.
Terraform templates are validated with Checkov.
Docker images are scanned with Trivy.
An SBOM is generated and the image is signed using Cosign.
Argo CD deploys only verified images to Kubernetes.
OPA Gatekeeper validates admission policies.
Falco detects suspicious runtime activity and forwards alerts to Splunk Enterprise Security.
SOAR automatically opens an incident ticket and notifies the security operations team.

Quick Revision Cheat Sheet

Topic	Key Point
DevSecOps	Security in SDLC
Shift Left	Early Security
SAST	Static Code Analysis
DAST	Runtime Testing
SCA	Dependency Scanning
Secrets	Vault
IaC Security	Checkov
Container Security	Trivy
Policy as Code	OPA
Kubernetes Policy	Kyverno
Image Signing	Cosign
SBOM	Software Inventory
Runtime Security	Falco
Zero Trust	Never Trust, Always Verify
SIEM	Security Monitoring
SOAR	Automated Response

Interview Tips

Remember these keywords

DevSecOps
Shift Left
Secure SDLC
SAST
DAST
SCA
OWASP Top 10
Secrets Management
Container Security
IaC Security
SBOM
Cosign
OPA
Kyverno
Falco
Zero Trust
SIEM
SOAR

Summary

DevSecOps interviews focus on integrating security into every stage of software delivery rather than treating security as a separate activity. Interviewers expect candidates to understand secure CI/CD pipelines, automated security testing, software supply chain security, Kubernetes security, runtime protection, policy enforcement, and cloud security.

Hands-on experience with SonarQube, Snyk, Trivy, Checkov, Vault, OPA, Kyverno, Cosign, Falco, Splunk, and Argo CD will significantly strengthen your ability to solve enterprise security challenges and succeed in DevOps, Platform Engineering, Cloud Engineering, Security Engineering, SRE, and Solution Architect interviews.