(ISC)² CSSLP Practice Exam with Explanation 2025 (Updated)

*Updated/Added new questions as of Sept. 2025*

CSSLP (Certified Secure Software Lifecycle Professional) is a certification from (ISC)2 that focuses on application security within the software development lifecycle (SDLC).

CSSLP certification recognizes leading application security skills. It shows employers and peers you have the advanced technical skills and knowledge necessary for authentication, authorization and auditing throughout the SDLC using best practices, policies and procedures established by the cybersecurity experts at (ISC)².

Companies are looking for talented workers who can implement software assurances, incorporate application access control and ensure the implementations of more secure coding. IT practitioners who are Certified Secure Software Lifecycle Professionals (CSSLP) might be the right answer to the needs of companies. With the current dependence on web applications and the rapid shift to virtual and mobile environments, an adequate number of CSSLPs who are dedicated to ensuring security through the software development lifecycle (SDLC) are a much-needed solution to pinpoint threats targeting web-based apps.

To qualify and be on your way to get certified, you must meet the CSSLP experience requirements:

“A minimum of four years of cumulative paid full-time software development lifecycle (SDLC) professional work experience in one or more of the eight domains of the (ISC)² CSSLP CBK, or three years of cumulative paid full-time SDLC professional work experience in one or more of the eight domains of the CSSLP CBK with a four-year degree or regional equivalent in computer science, information technology (IT) or related fields.”

Candidates must successfully pass the required CSSLP exam that evaluates testers across eight different domains, which are covered in the CSSLP exam outline.

CSSLP exam domains

Domain 1: Secure software concepts

Domain 2: Secure software requirements

Domain 3: Secure software architecture and design

Domain 4: Secure software implementation

Domain 5: Secure software testing

Domain 6: Secure software lifecycle management

Domain 7: Secure software deployment, operations, maintenance

Domain 8: Secure software supply chain