D487 STUDY GUIDE 2026 FULLY SOLVED
QUESTIONS AND COMPLETE SOLUTIONS
COMPREHENSIVE REVIEW MATERIAL
GRADED A+
⩥ SDLC Planning Phase.
Answer: Defines scope, goals, cost, timeline, and high-level risks.
⩥ SDLC Requirements Phase.
Answer: Captures what the system must do, including functional and
security needs.
⩥ SDLC Design Phase.
Answer: Creates architecture, data flows, and technical design decisions.
⩥ SDLC Implementation Phase.
Answer: Writes and integrates code based on designs and requirements.
⩥ SDLC Testing Phase.
Answer: Validates software behavior, quality, and security through
testing.
,⩥ SDLC Deployment Phase.
Answer: Releases software into production or a target environment.
⩥ SDLC Maintenance Phase.
Answer: Fixes bugs, patches vulnerabilities, and improves software over
time.
⩥ End-of-Life (EOL) Phase.
Answer: The stage where software is retired and no longer supported.
⩥ SDL (Security Development Lifecycle).
Answer: A security-focused set of activities added to the SDLC to
reduce vulnerabilities.
⩥ SDL Purpose.
Answer: Reduce the number of vulnerabilities and reduce the severity of
those that remain.
⩥ Secure by Design.
Answer: Building security into the design instead of adding it later as a
patch.
⩥ Security at the Source.
,Answer: Preventing flaws during development rather than relying only
on perimeter defenses.
⩥ Defense in Depth.
Answer: Multiple security layers so one failure does not cause total
compromise.
⩥ Least Privilege.
Answer: Give only the minimum access needed to complete a task.
⩥ Secure Defaults.
Answer: Default settings should be the safest option for users and
systems.
⩥ Attack Surface.
Answer: All places where an attacker can interact with the system.
⩥ Attack Surface Reduction.
Answer: Removing unnecessary entry points, services, and exposed
functionality.
⩥ Software Security.
, Answer: Building secure software through design, coding, and testing
practices.
⩥ Application Security.
Answer: Protecting software while running, often after release, using
operational controls.
⩥ Quality Code.
Answer: Code that is maintainable, reliable, and meets functional
requirements.
⩥ Secure Code.
Answer: Code that prevents unauthorized access, misuse, and
exploitation.
⩥ Quality vs Security.
Answer: Quality focuses on usability/maintainability; security focuses
on protection and resistance to attacks.
⩥ CIA Triad.
Answer: The three core security objectives: confidentiality, integrity, and
availability.
⩥ Confidentiality.
QUESTIONS AND COMPLETE SOLUTIONS
COMPREHENSIVE REVIEW MATERIAL
GRADED A+
⩥ SDLC Planning Phase.
Answer: Defines scope, goals, cost, timeline, and high-level risks.
⩥ SDLC Requirements Phase.
Answer: Captures what the system must do, including functional and
security needs.
⩥ SDLC Design Phase.
Answer: Creates architecture, data flows, and technical design decisions.
⩥ SDLC Implementation Phase.
Answer: Writes and integrates code based on designs and requirements.
⩥ SDLC Testing Phase.
Answer: Validates software behavior, quality, and security through
testing.
,⩥ SDLC Deployment Phase.
Answer: Releases software into production or a target environment.
⩥ SDLC Maintenance Phase.
Answer: Fixes bugs, patches vulnerabilities, and improves software over
time.
⩥ End-of-Life (EOL) Phase.
Answer: The stage where software is retired and no longer supported.
⩥ SDL (Security Development Lifecycle).
Answer: A security-focused set of activities added to the SDLC to
reduce vulnerabilities.
⩥ SDL Purpose.
Answer: Reduce the number of vulnerabilities and reduce the severity of
those that remain.
⩥ Secure by Design.
Answer: Building security into the design instead of adding it later as a
patch.
⩥ Security at the Source.
,Answer: Preventing flaws during development rather than relying only
on perimeter defenses.
⩥ Defense in Depth.
Answer: Multiple security layers so one failure does not cause total
compromise.
⩥ Least Privilege.
Answer: Give only the minimum access needed to complete a task.
⩥ Secure Defaults.
Answer: Default settings should be the safest option for users and
systems.
⩥ Attack Surface.
Answer: All places where an attacker can interact with the system.
⩥ Attack Surface Reduction.
Answer: Removing unnecessary entry points, services, and exposed
functionality.
⩥ Software Security.
, Answer: Building secure software through design, coding, and testing
practices.
⩥ Application Security.
Answer: Protecting software while running, often after release, using
operational controls.
⩥ Quality Code.
Answer: Code that is maintainable, reliable, and meets functional
requirements.
⩥ Secure Code.
Answer: Code that prevents unauthorized access, misuse, and
exploitation.
⩥ Quality vs Security.
Answer: Quality focuses on usability/maintainability; security focuses
on protection and resistance to attacks.
⩥ CIA Triad.
Answer: The three core security objectives: confidentiality, integrity, and
availability.
⩥ Confidentiality.
