Certified Secure Software Lifecycle Professional (CSSLP) Practice Tests

CSSLP tests whether you can build security into every phase of the software lifecycle. The current outline, effective September 15, 2023, has eight domains: Secure Software Concepts (12%), Lifecycle Management (11%), Requirements (13%), Architecture and Design (15%), Implementation (14%), Testing (14%), Deployment, Operations, and Maintenance (11%), and Supply Chain (10%). ISC2's live outline page now also explains how AI security is folded into these domains, but it has not published a new effective date or different weights.

The exam has 125 items in three hours, mixes multiple-choice and advanced item types, is delivered in English only, and needs 700 out of 1000 to pass. Standard registration is $599 in the US, Asia Pacific, Middle East, and Africa, EUR 575.04 in EMEA, and GBP 485.19 in the UK. The 175-question, four-hour figure you will see in older guides is the pre-2020 format. Certification also needs four years of full-time experience in one or more domains (a degree can waive up to one), or you can pass first and become an Associate of ISC2 with five years to earn the experience.

Use these 841 questions to practise the secure-lifecycle owner's reasoning: which phase a control belongs in, how a requirement becomes a design decision, what a test should prove, and where third-party and open-source risk enters. Once certified, you keep CSSLP with 90 CPE credits per three-year cycle and a $135 annual maintenance fee.

ISC2 CSSLP validates the ability to build security into every phase of the software lifecycle. The current outline, effective September 15, 2023, has eight domains: Secure Software Concepts, Lifecycle Management, Requirements, Architecture and Design, Implementation, Testing, Deployment, Operations and Maintenance, and Supply Chain. ISC2's live outline page also explains how AI security is incorporated into the domains.

The credential suits software architects, developers, testers, and security professionals who are responsible for secure delivery, and it is accredited under ISO/IEC 17024.

The CSSLP is intended for experienced software and security professionals who bear responsibility for security outcomes across the development lifecycle. Primary candidates include software architects, software engineers, application security specialists, security engineers, and software program managers who work directly in development organizations. Secondary audiences include quality assurance testers, penetration testers, software procurement analysts, project managers, security managers, and IT directors who oversee software delivery or vendor relationships.

Candidates typically have four or more years of hands-on SDLC experience and are already working in roles where they make or influence security design decisions. The certification is particularly well-suited for professionals transitioning from pure development into security-focused engineering roles, or for AppSec practitioners who want a globally recognized credential to formalize their expertise.

ISC2 requires a minimum of four years of cumulative, paid, full-time professional work experience in one or more of the eight CSSLP CBK domains. Candidates who hold a four-year degree in Computer Science, Information Technology, or a related field may substitute one year of that experience requirement, reducing the minimum to three years. There are no formal prerequisites requiring other certifications before sitting the exam.

Beyond the experience requirement, candidates are expected to have working familiarity with secure coding practices, threat modeling methodologies such as STRIDE or PASTA, cryptographic concepts, access control models, and at least one SDLC methodology (e.g., Agile, DevSecOps, waterfall). Professionals without the required experience at exam time can pass the exam and become an Associate of ISC2, with five years to accumulate the qualifying work experience before converting to full CSSLP status. All certified members must adhere to the ISC2 Code of Ethics.

The exam has 125 items in three hours, mixes multiple-choice and advanced item types, and is delivered in English only. A scaled score of 700 out of 1000 is required. ISC2 lists standard registration at $599 in the US, Asia Pacific, Middle East, and Africa, with regional prices in EMEA and the UK. The older 175-question, four-hour format predates 2020.

Certification requires four years of cumulative full-time experience in one or more domains, and a relevant degree can waive up to one year. Candidates who pass without the experience become an Associate of ISC2 and have five years to earn it. Maintenance takes 90 CPE credits per three-year cycle and a $135 annual maintenance fee.

CSSLP shows that you can apply security throughout design, development, testing, deployment, and supply-chain decisions rather than only at the end of a project. It is most useful for secure-software, application-security, and architecture roles where lifecycle accountability matters. The credential is DoDM 8140.03 approved according to ISC2.