An administrator needs to take multiple snapshots per day and retain them for one week.

 The correct answer is D because it matches the requirement of taking multiple snapshots per day and retaining them for one week. Option A is incorrect because it only takes one snapshot per day, which is not enough for the administrator’s need. Option B is incorrect because it only retains the snapshots for one week, which means the older snapshots will be deleted after seven days. Option C is incorrect because it only takes two snapshots per week, which is not frequent enough for the administrator’s need.

The following sources provide more information about the SLA retention policies and how to create and modify them in NDB:

Nutanix Database Management & Automation (NDMA) course, Module 4: Protecting Databases Using Time Machine, Lesson 4.1: Creating and Modifying SLA Retention Policies

Nutanix Certified Professional - Database Automation (NCP-DB) v6.5, Knowledge Objectives, Section 5 - Protect NDB-managed Databases Using Time Machine

Nutanix Database Service (NDB) User Guide, Chapter 6: Protecting Databases Using Time Machine, Section 6.1: Creating and Modifying SLA Retention Policies