CMDB Interview Questions

[Azim Kazi]

CMDB Interview Questions

1. CMDB stands for?
2. What is CMDB?
3. What is CI?
4. Which are base tables in CMDB?
5. Difference between Asset and CI
6. Datacenter is asset or not?
7. In CMDB where we store datacenter
8. In how many ways to populate CMDB data?
9. what is CMDB Relationship?
10. How to test CMDB Health?
11. what is identification rules?
12. What are reconciliation rules?
13. what is data precedence?
14. which role is needed to manage CMDB?
15. How CMDB works, how does the data flow? How CI relations are maintaining, how are they normalized.
16. Asset vs CI with example
17. can we create multiple criterian attribute for a table.
18. Main base table of cmdb,windows server,router,business application?
19. Any five best practice for CMDB?
20. How CMDB rules work explain with their order.

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[msiraj]

CMDB - Configuration Management Database

[Rahman786]

1. CMDB stands for: Configuration Management Database

2. What is CMDB?: CMDB is a database that stores information about IT assets, configurations, and relationships.

3. What is CI?: CI stands for Configuration Item, which represents a single IT asset or component.

4. Base tables in CMDB: The base tables in CMDB are:
- cmdb_ci (stores CI records)
- cmdb_rel_ci (stores relationships between CIs)

5. Difference between Asset and CI: Assets represent financial ownership, while CIs represent functional ownership.

6. Datacenter is asset or not?: A datacenter is typically considered a CI, not an asset.

7. Where to store datacenter in CMDB: Datacenter information is stored in the cmdb_ci table.

8. Ways to populate CMDB data: CMDB data can be populated through:
- Manual entry
- Import sets
- Discovery tools
- API integrations

9. CMDB Relationship: CMDB relationships define how CIs are connected or depend on each other.

10. Test CMDB Health: CMDB health can be tested through:
- Data integrity checks
- Reconciliation rules
- Identification rules

11. Identification rules: Identification rules help identify and merge duplicate CI records.

12. Reconciliation rules: Reconciliation rules ensure data consistency between CMDB and external sources.

13. Data precedence: Data precedence determines which data source takes priority when conflicting data is found.

14. Role needed to manage CMDB: The "cmdb_admin" role is typically required to manage CMDB.

15. How CMDB works: CMDB works by storing and managing CI records, relationships, and data from various sources.

16. Data flow: Data flows into CMDB through various sources, and CMDB rules ensure data consistency and integrity.

17. CI relations maintenance: CI relations are maintained through cmdb_rel_ci table and reconciliation rules.

18. Normalization: Normalization ensures data consistency and reduces duplicates.

19. Asset vs CI example: A laptop (asset) can have multiple CIs (e.g., CPU, RAM, HDD).

20. Multiple criteria attribute: Yes, multiple criteria attributes can be created for a table.

21. Main base table of CMDB: cmdb_ci

22. Examples of base tables: windows_server, router, business_application

23. Five best practices for CMDB:
- Define clear CI and relationship criteria
- Establish data governance and ownership
- Use identification and reconciliation rules
- Regularly audit and clean up data
- Train users on CMDB processes

24. CMDB rules order:
- Identification rules
- Reconciliation rules and Data precedence rules
**Data precedence rules are now merged with reconciliation rules starting Paris release

[Subrat Jain]

@Rahman786 - on last question (#24), data precedence rules are now merged with reconciliation rules starting Paris release.

https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB0756709

[Anubhav24]

Hi @Azim Kazi @Rahman786 

21. Main base table of CMDB: cmdb_ci : Isnt the base CMDB table is Base Configuration Items [cmdb]