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5 free, original PBQs for DataSys+ (DS0-001 and DS0-002), with drag-and-drop. Do each task, check it, and read why the answer is right.
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CompTIA DataSys+
You do each task instead of picking an answer. Every question is explained after you check it, and you get a score at the end.
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The questions
Each one with its scenario and task. Try it above first, then open the explanation.
Question 1 · Ordering · Database Fundamentals
A report needs each region’s total sales for 2026, but only regions that sold more than 10,000, with the largest first. The six clauses of the query were written on separate lines and have been shuffled.
Arrange the clauses in the order they are written in the query.
SQL fixes the order in which clauses are written: SELECT, FROM, WHERE, GROUP BY, HAVING, ORDER BY. WHERE filters rows before they are grouped, and HAVING filters the groups afterwards, which is why a condition on SUM(amount) has to go in HAVING. ORDER BY comes last because it sorts the finished result.
Question 2 · Sorting · Database Fundamentals
A permissions review splits SQL statements by what they do, because different roles are allowed to run different kinds.
Put each statement under its sublanguage.
Data definition language changes the structure: tables and indexes. Data manipulation language changes the rows inside them. Data control language manages permissions, and transaction control language ends a transaction by saving or undoing it. A developer may need the manipulation statements in production without ever needing the definition ones.
Question 3 · Matching · Database Management and Maintenance
The on-call database administrator has four tickets about a busy order database.
Match each problem to the action that fixes it.
A query that filters on a column with no index has to read the whole table, so an index on that column is the fix. Heavy deletes leave an index fragmented, and rebuilding it restores its order. The optimizer chooses plans from statistics about the data, so after a large load the statistics must be updated. A data file that is nearly full needs more space before inserts start failing. Removing foreign keys or switching off logging would trade a performance problem for a data integrity one.
Question 4 · Matching · Data and Database Security
A security assessment of the customer database found five weaknesses, and the report must recommend one control for each.
Match each finding to the control that addresses it.
Parameterized queries keep user input separate from the SQL command, which stops SQL injection. Encryption at rest makes stolen backups and disks unreadable. Data masking lets staff work with records without seeing whole card numbers. Least privilege means the application’s account can do only what the application needs. Auditing records who changed what, and when. An index or a different table design would do nothing for any of these.
Question 5 · Matching · Business Continuity
The recovery plan for the order database combines several kinds of backup with a standby server, and the new administrator needs to know what each one contributes.
Match each description to the term.
A full backup is the baseline. A differential backup holds everything changed since the last full backup, so a restore needs the full and one differential. An incremental backup holds only what changed since the last backup of any kind, so it is smaller but a restore needs every one in the chain. Transaction log backups let you restore to a chosen moment between backups. Replication keeps a standby server current, which is about staying available, not about recovering deleted data.
CompTIA lists DataSys+ among its certifications with simulation performance-based questions: tasks in an approximation of a real tool, such as a firewall, a network diagram or a terminal window. CompTIA’s page on performance-based questions, read on November 12, 2026.
Guide
CompTIA describes performance-based questions as exam items that test your ability to solve problems in real-world settings. Most are simulations: an approximation of a tool such as a firewall, a network diagram, a terminal window or an operating system.
You don’t pick an answer. You do the task, and there can be more than one correct way to do it.
Try each question cold. Getting it wrong first and then reading why teaches more than reading the answer and nodding along.
A right answer reached by guessing is a wrong answer waiting for exam day. Every question here explains why each part is what it is.
CompTIA says a simulation question can be skipped and returned to later, with your work saved. If one is eating your time, move on, answer the multiple-choice questions and come back.
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Yes. CompTIA lists DataSys+ among its certifications with simulation performance-based questions: tasks in an approximation of a real tool, such as a firewall, a network diagram or a terminal window. That is from CompTIA’s page on performance-based questions, read on November 12, 2026.
No. They’re original tasks written to each exam’s published objectives. Using leaked real exam questions breaks every vendor’s exam rules.
CompTIA says a performance-based question can have more than one correct way through it, that its scoring allows for the different approaches, and that partial credit may be given. Here, each question is scored by its parts, so you can see which part you missed.
CompTIA says a simulation question can be skipped and returned to later, and that your work on it is saved when you move on. A virtual-environment question has to be completed when you reach it: a warning screen tells you so first.
No. The questions run in your browser and nothing is saved. Sign up only if you want full practice exams and progress tracking.
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