CompTIA DataSys+ study guide · 2026

The 5 CompTIA DataSys+ domains, explained

5 domains and 17 official objectives. Database Management and Maintenance carries the most weight at 25%. Each guide explains what the domain covers, how its questions are framed and where candidates lose marks.

Start with Domain 3 See all domains
Questions
Maximum of 90 (multiple-choice and performance-based)
Time
90 minutes
Passing score
700 (on a scale of 100-900)
Outline
CompTIA DataSys+ DS0-001 Exam Objectives, Version 4.0 (exam launched 18 July 2023)

Exam blueprint

Bar widths follow the official weights. Weight ranges are drawn at their midpoint.

  1. 1 24%
  2. 2 16%
  3. 3 25%
  4. 4 23%
  5. 5 12%
  1. 1 Database Fundamentals
  2. 2 Database Deployment
  3. 3 Database Management and Maintenance
  4. 4 Data and Database Security
  5. 5 Business Continuity

All 5 domains

17 official objectives 100–135 hrs suggested study

  1. Domain 01 24%

    Database Fundamentals

    The technical core of DataSys+: how relational and NoSQL databases store data, how SQL changes it safely, and how scripts and ORM code load the server. Every later domain assumes this fluency.

    Inside this domain

    • Compare and contrast database structure types.
    • Given a scenario, develop, modify, and run SQL code.
    • Compare and contrast scripting methods and scripting environments.
    • Explain the impact of programming on database operations.

    Watch for Relational by default

    Objectives
    4
    Questions est.
    ~22
    Study time est.
    25–35 hrs
  2. Domain 02 16%

    Database Deployment

    How a database goes from a requirement to a running, tested system: sizing, architecture and design documents, then installation, network connectivity, testing and validation before users arrive.

    Inside this domain

    • Compare and contrast aspects of database planning and design.
    • Explain database implementation, testing, and deployment phases.

    Watch for Technology before requirements

    Objectives
    2
    Questions est.
    ~14
    Study time est.
    15–20 hrs
  3. Domain 03 25%

    Database Management and Maintenance

    The heaviest DataSys+ domain and the daily work of a DBA: watching the database against a baseline, tuning and patching it under change control, documenting it, and shaping data with tables, views and indexes.

    Inside this domain

    • Explain the purpose of monitoring and reporting for database management and performance.
    • Explain common database maintenance processes.
    • Given a scenario, produce documentation and use relevant tools.
    • Given a scenario, implement data management tasks.

    Watch for Hardware first

    Objectives
    4
    Questions est.
    ~23
    Study time est.
    25–35 hrs
  4. Domain 04 23%

    Data and Database Security

    How a DBA protects data at every layer: encryption and masking, compliance obligations, least-privilege access, physical and network defenses, and the attacks each control is meant to stop.

    Inside this domain

    • Explain data security concepts.
    • Explain the purpose of governance and regulatory compliance.
    • Given a scenario, implement policies and best practices related to authentication and authorization.
    • Explain the purpose of database infrastructure security.
    • and 1 more objectives

    Watch for Encrypt to hide from users

    Objectives
    5
    Questions est.
    ~21
    Study time est.
    25–30 hrs
  5. Domain 05 12%

    Business Continuity

    What keeps data recoverable when everything else fails: disaster recovery plans, techniques and tests measured against RPO and RTO, and backup and restore practices that actually work on the day.

    Inside this domain

    • Explain the importance of disaster recovery and relevant techniques.
    • Explain backup and restore best practices and processes.

    Watch for Replication is a backup

    Objectives
    2
    Questions est.
    ~11
    Study time est.
    10–15 hrs

Study the heaviest domains first

Marks follow weight. This order puts the most marks behind you first, across about 100–135 hrs of study.

  1. 3 Database Management and Maintenance 25% · 25–35 hrs
  2. 1 Database Fundamentals 24% · 25–35 hrs
  3. 4 Data and Database Security 23% · 25–30 hrs
  4. 2 Database Deployment 16% · 15–20 hrs
  5. 5 Business Continuity 12% · 10–15 hrs

Try one

Practice questionDomain 3: Database Management and Maintenance

A sales dashboard aggregates 200 million order rows and is opened by hundreds of users every minute, overloading the server. Business owners confirm that figures up to one hour old are acceptable. Which change BEST meets the requirement?

One trap from every domain

The answer that looks right, and the clue that gives it away.

  • Domain 1

    Relational by default

    Clue Words like connections, hops, friends of friends, or paths between entities.

  • Domain 2

    Technology before requirements

    Clue The stem says the project is in its early or planning stage, or requirements are not yet documented.

  • Domain 3

    Hardware first

    Clue A single query or report is slow while the rest of the system is normal.

  • Domain 4

    Encrypt to hide from users

    Clue The people involved are authorized to query but should see only part of the data.

  • Domain 5

    Replication is a backup

    Clue Recovering from an accidental delete, corruption or malware rather than hardware loss.

Other Data & Analytics certifications

Study guides for exams that overlap with CompTIA DataSys+.

Practise what you read

CompTIA DataSys+ domains: common questions

How many domains are in the CompTIA DataSys+ exam?

CompTIA DataSys+ has 5 domains with 17 official objectives between them: Database Fundamentals, Database Deployment, Database Management and Maintenance, Data and Database Security and Business Continuity.

Which CompTIA DataSys+ domain carries the most weight?

Database Management and Maintenance is the heaviest at 25%, followed by Database Fundamentals (24%). The lightest is Business Continuity (12%). Weights come from CompTIA's official outline.

What is the CompTIA DataSys+ exam format?

Questions: Maximum of 90 (multiple-choice and performance-based). Time allowed: 90 minutes. Passing score: 700 (on a scale of 100-900).

How long should I study for CompTIA DataSys+?

Our planning estimate is 100–135 hrs across all domains, split by weight. It is an editorial estimate, not an official figure, so adjust it to your experience and to how you score on practice questions.

Where should I start?

Start with Database Management and Maintenance, because it carries the most marks, then work down by weight. Use the checklist on each domain page to confirm you can do what the domain asks before moving on.

Which outline is this guide based on?

This guide follows CompTIA DataSys+ DS0-001 Exam Objectives, Version 4.0 (exam launched 18 July 2023), published by CompTIA. It was last reviewed in October 2026.

Domain names, weights and objectives come from CompTIA's official outline (CompTIA DataSys+ DS0-001 Exam Objectives, Version 4.0 (exam launched 18 July 2023)). Question counts and study hours are editorial planning estimates, not official figures. Last reviewed October 2026.