# CompTIA DS0-001 DataSys+ Prep — Practice Questions & Exam Prep

> Practice Questions & Exam Prep (iPhone/iPad app by Davy Raitt.)

- Source: https://appshunter.io/ios/app/comptia-ds0/id6761265808 (this page in markdown: same URL + `.md`)
- Developer: [Davy Raitt](https://appshunter.io/developer/1795318281)
- Category: Education, Productivity
- Price: $12.99
- Age rating: 4+
- Requires: iOS 15.0 · 27 MB
- Languages: English
- Released: 2026-03-27
- Data updated: 2026-05-15
- User reviews in markdown: https://appshunter.io/ios/app/comptia-ds0/id6761265808/reviews.md

## What is CompTIA DS0?

PASS YOUR COMPTIA DATASYS+ EXAM
Master database systems and data infrastructure with 500+ practice questions designed to get you certified on your first attempt.
500+ practice questions
5-minute study sessions
Track your progress
Remove mastered questions
Text-to-speech support
Dark mode available

WHY GET CERTIFIED?
Data professionals earn up to $203K annually (Skillsoft 2024). CompTIA DataSys+ validates your ability to deploy, manage, and secure database environments — a credential that sets you apart in one of tech's fastest-growing fields.

WHAT YOU'LL MASTER:
• Relational database design with primary keys, foreign keys, and entity relationships
• Normalization through 1NF, 2NF, 3NF, and BCNF with strategic denormalization techniques
• NoSQL database types including document, key-value, column-family, and graph models
• MongoDB document databases with collections, BSON structures, and aggregation pipelines
• DynamoDB key-value stores with partition keys, sort keys, and provisioned throughput
• SQL operations including joins, subqueries, aggregations, and stored procedures
• ACID transaction properties for relational integrity and consistency guarantees
• BASE model principles for eventually consistent distributed database architectures
• CAP theorem trade-offs between consistency, availability, and partition tolerance
• Database deployment across on-premises, cloud, hybrid, and containerized environments
• Backup and replication strategies including full, incremental, differential, and log shipping
• Business continuity planning with RTO, RPO, failover clustering, and disaster recovery
• Database security with encryption at rest, encryption in transit, RBAC, and audit logging
• Database scaling with vertical scaling, horizontal sharding, read replicas, and load balancing
• Performance optimization through indexing strategies, query tuning, and execution plan analysis

STUDY ANYWHERE:
Coffee breaks. Commutes. Lunch hours. Turn dead time into database expertise.
Download now. Pass your exam. Master data systems.


## Version history (last 2 releases)

### 3.0.0 — 2026-04-16

New: Review missed questions after each quiz. Improved quiz experience with radio buttons for single-answer questions. Added exit button during quizzes. Better score display. Stability improvements.

### 2.1.0 — 2026-03-27

No release notes.

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All apps by Davy Raitt: https://appshunter.io/developer/1795318281

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-15.*