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Web Security

100 Web Security interview questions

Only coding challenges
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Web Security Fundamentals


  • 1.

    What is web security, and why is it important?

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  • 2.

    Can you explain what HTTPS is and how it differs from HTTP?

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  • 3.

    What are SSL and TLS, and what role do they play in web security?

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  • 4.

    How do SSL certificates work, and what is the purpose of a Certificate Authority (CA)?

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  • 5.

    What is the difference between encryption and hashing?

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  • 6.

    Define the concept of a secure session and explain how it is established.

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  • 7.

    What are some common web security vulnerabilities?

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  • 8.

    Can you explain the Cross-Site Scripting (XSS) attack and how to prevent it?

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  • 9.

    What is SQL Injection and how can you defend against it?

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  • 10.

    Describe what Cross-Site Request Forgery (CSRF) is and how to prevent it.

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  • 11.

    Explain the Same-Origin Policy and its importance in web security.

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  • 12.

    What is Clickjacking, and what measures can prevent it?

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  • 13.

    How can web cookies compromise security, and how do you safeguard against these risks?

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  • 14.

    What is a Man-in-the-Middle (MitM) attack and how can it be prevented?

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  • 15.

    Describe the concept of session management in web security.

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Authentication and Authorization


  • 16.

    What is the difference between authentication and authorization?

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  • 17.

    Explain basic authentication and its weaknesses.

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  • 18.

    What is OAuth, and how does it work?

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  • 19.

    What is OpenID and how does it relate to web security?

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  • 20.

    Can you describe Multi-Factor Authentication (MFA) and where it’s used?

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  • 21.

    What is JWT (JSON Web Tokens) and how are they used in authentication?

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  • 22.

    How do you securely store user passwords?

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  • 23.

    What is Single Sign-On (SSO) and what are its benefits?

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  • 24.

    Explain role-based access control (RBAC) and how it is implemented.

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  • 25.

    What are the best practices for handling user session timeouts?

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Network Security Concerns


  • 26.

    What is a firewall, and how does it contribute to web security?

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  • 27.

    Define a Virtual Private Network (VPN) and its significance in enhancing web security.

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  • 28.

    What is an Intrusion Detection System (IDS) vs. an Intrusion Prevention System (IPS)?

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  • 29.

    How does a Distributed Denial-of-Service (DDoS) attack work, and how can websites be protected from it?

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  • 30.

    Explain the concept of a Content Delivery Network (CDN) and its importance in web security.

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Secure Coding Practices


  • 31.

    What are secure coding practices, and why are they needed?

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  • 32.

    How can input validation prevent web security threats?

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  • 33.

    What are parameterized queries, and how do they prevent SQL injection?

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  • 34.

    Why should developers avoid security through obscurity?

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  • 35.

    How do you securely handle file uploads to prevent web security issues?

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Data Protection and Privacy


  • 36.

    Define Personally Identifiable Information (PII) and discuss how it should be protected.

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  • 37.

    What is the General Data Protection Regulation (GDPR), and what are its key tenets?

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  • 38.

    What are data encryption best practices for sensitive information?

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  • 39.

    Explain data masking and how it can protect sensitive data.

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  • 40.

    What steps can organizations take to ensure data privacy?

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Advanced Web Security Concepts


  • 41.

    What are security headers, and why are they important?

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  • 42.

    What is Content Security Policy (CSP) and how does it improve web security?

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  • 43.

    Can you explain the role of Subresource Integrity (SRI) in web security?

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  • 44.

    What is Domain Name System Security Extensions (DNSSEC), and how does it work?

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  • 45.

    What is HTTP Strict Transport Security (HSTS) and how can it be used?

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Security Testing and Audits


  • 46.

    What is penetration testing, and how does it differ from vulnerability scanning?

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  • 47.

    How is fuzzing used in security testing?

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  • 48.

    What are the main objectives of a security audit?

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  • 49.

    Can you explain the concept of threat modeling?

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  • 50.

    What is static code analysis and how it is beneficial in identifying security risks?

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Compliance and Standards


  • 51.

    What are some common web security compliance standards?

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  • 52.

    Explain the purpose and key aspects of ISO/IEC 27001.

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  • 53.

    What is PCI DSS and its relevance to web security?

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  • 54.

    Can you discuss the importance of HIPAA compliance in web applications?

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Emerging Threats and Trends


  • 55.

    How do you stay informed about the latest web security threats?

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  • 56.

    Can you discuss the implications of quantum computing on web security?

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  • 57.

    What role does artificial intelligence play in web security?

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  • 58.

    How can Internet of Things (IoT) devices create web security risks?

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  • 59.

    What is Zero Trust security architecture?

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Incident Response and Handling


  • 60.

    What is an incident response plan, and why is it critical?

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  • 61.

    Explain the steps you would take after discovering a data breach.

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  • 62.

    How important is user training in preventing web security incidents?

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  • 63.

    Can you discuss the role of a Security Operations Center (SOC)?

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Cloud Security


  • 64.

    How does web security change when applications are moved to the cloud?

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  • 65.

    What are the shared responsibility models in cloud security?

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  • 66.

    Explain how encryption is handled in the cloud.

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  • 67.

    What special considerations are there for web security with cloud storage services?

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  • 68.

    How does a Web Application Firewall (WAF) protect cloud-hosted web applications?

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Security in Web Application Frameworks


  • 69.

    What built-in security features do modern web application frameworks typically include?

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  • 70.

    How does Ruby on Rails handle web security, and what are its built-in protection mechanisms?

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  • 71.

    What are the security features provided by Django for Python web applications?

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  • 72.

    How does ASP.NET Core enforce web security?

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  • 73.

    What security considerations must be taken into account when using client-side JavaScript frameworks like Angular, React, or Vue.js?

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Mobile Web Security


  • 74.

    How do mobile web applications pose unique security challenges?

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  • 75.

    What steps can be taken to secure mobile APIs and services?

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  • 76.

    Discuss the security implications of third-party libraries in mobile web app development.

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  • 77.

    What are common vulnerabilities found in mobile web applications?

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Secure Infrastructure


  • 78.

    How does server hardening affect web security?

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  • 79.

    Explain the importance of patch management in maintaining web security.

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  • 80.

    What is network segmentation, and how can it improve security for web applications?

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  • 81.

    Describe how load balancers can be configured to improve web application security.

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Cryptography in Web Security


  • 82.

    What is the difference between symmetric and asymmetric encryption, and how are they used in web security?

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  • 83.

    Explain the role of digital signatures in maintaining web security.

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  • 84.

    What is a cryptographic hash function, and where is it used in web security?

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  • 85.

    How can Public Key Infrastructure (PKI) be used to secure web applications?

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DevSecOps and Web Security


  • 86.

    How does DevSecOps integrate security into the web development lifecycle?

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  • 87.

    What are security Information and Event Management (SIEM) systems and their role in web security?

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  • 88.

    How can containerization improve web security?

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  • 89.

    Discuss the role of automated security pipelines in web application deployments.

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API and Web Service Security


  • 90.

    What are the primary concerns for REST API security?

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  • 91.

    How does OAuth 2.0 provide secure delegated access?

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  • 92.

    What are best practices for securing GraphQL APIs?

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  • 93.

    How can webhooks be secured to ensure they are not exploited?

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  • 94.

    Explain the significance of rate limiting in API security.

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Web Security Culture and Policy


  • 95.

    How do you foster a culture of security within a web development team?

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  • 96.

    What should a web security policy include?

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  • 97.

    Discuss the process of conducting a security risk assessment for web applications.

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  • 98.

    How does change management impact web security?

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  • 99.

    Why should a company have an established data breach response protocol?

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Miscellaneous Web Security


  • 100.

    What is the Secure Development Lifecycle (SDL) and its relevance to web security?

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