ISC Security Planning And Engineering Practice Question
When designing a secure multi-tenant cloud application, what is the best way to ensure tenant data isolation?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Implement row-level security (RLS) in the database for each tenant.
Row-level security (RLS) within a database or using separate database instances per tenant ensures that one tenant cannot access another's data.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use a single global admin account for all tenants.
Why it's wrong here
This violates the principle of least privilege.
- ✓
Implement row-level security (RLS) in the database for each tenant.
Why this is correct
RLS is a robust logical control for tenant isolation.
- ✗
Rely on application-level filtering.
Why it's wrong here
Application-level filters are easily bypassed if the code has bugs.
- ✗
Use a shared database with a common schema for all tenants.
Why it's wrong here
Without RLS, this is highly insecure and prone to data leakage.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official (ISC)² exam blueprint
This ISC practice question is part of Courseiva's free (ISC)² certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the ISC exam.