CSSLP - Certified Secure Software Lifecycle Professional Practice Test
Prepare for the ISC2 CSSLP exam with free practice tests designed around the current 3-hour, 125-question exam format. Each test includes 20 questions with a proportional timer of about 29 minutes to help you build speed and accuracy across the full secure software development lifecycle.
Mixed Set — CSSLP Practice Tests
These mixed practice tests distribute questions across all eight CSSLP domains using the current ISC2 exam outline. Higher-weighted domains like Secure Software Architecture and Design, Secure Software Implementation, and Secure Software Testing appear more often to better reflect the real exam blueprint.
Domain Wise — CSSLP Mock Tests
Focus on one CSSLP domain at a time with targeted mock tests. Each set contains 20 questions from a single domain so you can reinforce weak areas before returning to mixed practice.
About the CSSLP Certification Exam
Learn what the CSSLP validates, who should take it, and why it remains one of the strongest credentials for secure software and application security professionals.
What Is the CSSLP?
The Certified Secure Software Lifecycle Professional (CSSLP) is an ISC2 certification for professionals who build, assess, and manage security throughout the software development lifecycle. It validates the ability to apply security practices from concepts and requirements through architecture, implementation, testing, deployment, operations, and supply chain governance.
The CSSLP is designed for software architects, software engineers, developers, application security specialists, QA testers, software program managers, project managers, procurement analysts, and IT or security leaders who influence secure development. It is especially valuable for teams working in DevSecOps, secure SDLC programs, cloud-native engineering, product security, and regulated environments where software assurance is a core requirement.
Professionals with CSSLP-aligned skills often move into roles such as Application Security Engineer, Secure SDLC Lead, Product Security Engineer, DevSecOps Engineer, Software Security Architect, and Security Consultant. In many markets, these roles commonly command six-figure compensation because they combine software engineering depth with security expertise.
Exam Format (2026)
Testing method: Linear exam delivered at Pearson VUE testing centers.
Questions: 125 items.
Duration: 3 hours.
Question types: Multiple-choice and advanced item types.
Passing score: 700 out of 1,000 points.
Exam fee: $599 USD in the Americas and many regions, with regional pricing variations.
Eligibility Requirements
Experience: 4 years of cumulative, full-time experience in one or more of the 8 CSSLP domains.
Education waiver: A bachelor’s or master’s degree in computer science, IT, or a related field may satisfy up to 1 year of the requirement.
Associate path: If you pass the exam without the required experience, you can become an Associate of ISC2 and have 5 years to earn the 4 years of experience.
Accepted experience: Part-time work and internships may count when properly documented.
Renewal: Maintain certification through ISC2 continuing education and annual maintenance requirements.
CSSLP Domain Weights — Current ISC2 Exam Outline
The CSSLP exam covers eight domains across the secure software lifecycle. The weights below reflect the current ISC2 exam outline updated in September 2023 and still in effect for current candidates.
| Domain | Topic | Weight |
|---|---|---|
| Domain 1 | Secure Software Concepts | 12% |
| Domain 2 | Secure Software Lifecycle Management | 11% |
| Domain 3 | Secure Software Requirements | 13% |
| Domain 4 | Secure Software Architecture and Design | 15% |
| Domain 5 | Secure Software Implementation | 14% |
| Domain 6 | Secure Software Testing | 14% |
| Domain 7 | Secure Software Deployment, Operations, Maintenance | 11% |
| Domain 8 | Secure Software Supply Chain | 10% |
How Our Practice Tests Are Designed
Aligned to the current blueprint — Our mixed sets follow the official eight-domain CSSLP outline so higher-weighted areas like Architecture and Design, Implementation, and Testing naturally receive more attention.
Timer matched to the real exam — The live CSSLP exam gives you 180 minutes for 125 questions, which is about 1.44 minutes per question. We apply that pace to each 20-question practice set, giving you roughly 29 minutes.
Scenario-based software security focus — The questions are written to reflect real secure development decisions, including threat modeling, requirements, secure coding, testing choices, release controls, and supply chain governance.
Domain-wise improvement — The focused tests let you drill one domain at a time, which is especially useful when mixed-set results show weaker areas in requirements, architecture, implementation, or testing.
CSSLP Exam Preparation Tips
Study Strategy
Follow the SDLC in order: Study the exam as a lifecycle, not as isolated topics. Understand how concepts, requirements, architecture, implementation, testing, deployment, and supply chain controls connect.
Map security to engineering decisions: The CSSLP rewards candidates who can explain why a control belongs in a specific phase of the lifecycle and how it reduces real software risk.
Use practical examples: Review threat models, secure coding issues, CI/CD controls, dependency risks, and testing outputs from real projects so the concepts become easier to apply.
Test-Taking Strategy
Read for lifecycle context: Many answer choices look plausible until you identify which SDLC phase the question is really asking about.
Think in terms of prevention first: On architecture and implementation questions, the best answer often prevents classes of issues rather than merely detecting them later.
Manage time steadily: With just over 1.4 minutes per question, keep moving. Use timed practice to build a consistent pace before exam day.
Frequently Asked Questions
Ready to Test Your CSSLP Knowledge?
Start with a mixed set to measure your readiness, then use domain-wise tests to strengthen specific phases of the secure software lifecycle.
Start CSSLP Practice Test 1 →
