ISC2 CSSLP Practice Test

The ISC2 CSSLP Practice Test is a free intermediate-level, 20-minute skill test from Science of Apps. Exam-style practice for the ISC2 Certified Secure Software Lifecycle Professional (CSSLP). Covers secure software concepts and requirements (security principles and risk), secure design and architecture (threat modeling and secure design principles), secure coding and testing (secure coding, OWASP risks and security testing), and secure deployment, operations, supply chain and the lifecycle. Written to ISC2 CSSLP, OWASP and the NIST SSDF for 2026. Score 70% or more on its 20 questions to earn a verifiable CSSLP Exam Preparation certificate (SOA-ISC2). Every question is based on published standards and research — including ISC2 Certified Secure Software Lifecycle Professional (CSSLP) (ISC2), Secure Software Development Framework (SSDF), NIST SP 800-218 (NIST), OWASP Top 10 (OWASP) — and each answer is explained with its source.

Yes. Science of Apps has a free ISC2 CSSLP Practice Test built on the current ISC2 exam outline for 2026 and 2027. It covers secure software concepts and requirements, secure design and architecture, secure coding and testing and deployment, operations and supply chain, scores you instantly and issues a verifiable certificate.

Read the four skill areas on this page, then take the 20-minute test online — no fee, course or sign-up. You see every answer explained when you finish. Score 70% or more and you get a CSSLP Exam Preparation certificate straight away, on screen, as a PDF and by email, with a credential ID anyone can verify.

Yes. The questions are original scenarios written by Science of Apps, and each one is based on a public source you can read: ISC2 Certified Secure Software Lifecycle Professional (CSSLP) (ISC2); Secure Software Development Framework (SSDF), NIST SP 800-218 (NIST); OWASP Top 10 (OWASP). The source is shown under each question and linked in the answer review. Science of Apps doesn't copy questions from other tests.

Four skill areas with five questions each, drawn from a bank of 10 per area so a retake brings new questions: Secure Software Concepts and Requirements (Principles, Requirements and Risk); Secure Design and Architecture (ThreatModeling, Principles and Patterns); Secure Coding and Testing (Coding, OWASP and Testing); Deployment, Operations and Supply Chain (Deployment, SupplyChain and Lifecycle). Every question is an original scenario written to the 2026–2027 standard, with the published source named under it.

Software developer or engineer, Application security engineer, Security architect, DevSecOps engineer and CSSLP candidate. It suits anyone who wants a quick, verifiable way to show ISC2 CSSLP knowledge in 2026 and 2027, from students and career switchers to experienced professionals.

The Certified Secure Software Lifecycle Professional (CSSLP) is an ISC2 certification validating expertise in building security into every phase of the software development lifecycle — from requirements and design through coding, testing, deployment, operations and supply chain. It is vendor-neutral.

Fixing a security flaw late (in production) is far costlier and riskier than preventing it early. Addressing security in requirements, design, coding and testing — "shifting left" — catches issues when they are cheaper to fix and produces more resilient software.

No. It is an independent practice test written to the publicly available ISC2 CSSLP content outline for 2026 and 2027, for checking your readiness before you book the real exam. Passing earns a Science of Apps certificate rather than the official credential.

Yes. The test is online, in English and free everywhere — people take it from India, the US, the UK, Europe, Africa, Latin America and Asia-Pacific. Your certificate is dated with your own local date and can be verified from anywhere at scienceofapps.com/certification/verify/.

20 questions — 5 from each of 4 skill areas — with a 20-minute limit. You need 70% (14 of 20) to pass and 90% for distinction.

We rate it Intermediate: assumes hands-on experience in the role. It has 20 scenario questions — 5 from each of 4 skill areas — and a 20-minute limit. You need 70% (14 of 20) to pass and 90% for distinction.

Nothing. There is no fee to take a test, to receive the certificate, to have it emailed or to verify it, and no sign-up.

On our server, not in your browser. The answers never reach the page until you submit, so a certificate can only be earned by passing. Each certificate gets a unique credential ID stored by Science of Apps.

You see your score for each area and every question with the correct answer and why, with the published source behind it. You can retake after 30 minutes, and the retake draws questions you haven't seen yet.

No. Every certificate is dated, so it always shows when you passed. Retake a test any time for a newer date or a higher score.

Yes. After you pass, Add to LinkedIn opens the Licenses & certifications form with the certificate name, Science of Apps as the issuer, the issue date, your credential ID and the verification link filled in. You can also download it as a PDF or PNG, and it's emailed to you as a PDF.

Every certificate has a credential ID and a QR code. Scanning it, or entering the ID at scienceofapps.com/certification/verify/, shows the holder's name, the certification, the score and the issue date from our records.

No. They are Science of Apps' own assessments of applied skill. They aren't issued by a university or standards body, and they work best alongside a portfolio that shows the skills in real work.