Free DA0-002: CompTIA Data+ Exam (2025) Exam Questions and Answers
CompTIA Data+ Exam (2025) (DA0-002) is a CompTIA certification exam. This page has free DA0-002 practice questions with answers and explanations, set out the way the real exam asks them, plus a timed DA0-002 practice test that scores you against the pass mark.
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Last updated: September 26, 2026
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Question #9
The following SQL code returns an error in the program console: SELECT firstName, lastName, SUM(income) FROM companyRoster SORT BY lastName, income Which of the following changes allows this SQL code to run?
Correct answer: B
Explanation
This question falls under theData Analysisdomain, focusing on SQL query correction. The query uses an aggregate function (SUM) but has two issues: it uses "SORT BY" (incorrect syntax) and lacks a GROUP BY clause for non-aggregated columns. • The query selects firstName, lastName, and SUM(income), but firstName and lastName are not aggregated, requiring a GROUP BY clause. • "SORT BY" is incorrect; the correct syntax is "ORDER BY." • Option A: SELECT firstName, lastName, SUM(income) FROM companyRoster HAVING SUM(income) > 10000000This adds a HAVING clause but doesn't fix the GROUP BY issue, so it's still invalid. • Option B: SELECT firstName, lastName, SUM(income) FROM companyRoster GROUP BY firstName, lastNameThis adds the required GROUP BY clause for firstName and lastName, fixing the aggregation error. While it removes the ORDER BY, the query will run without it, addressing the primary error. • Option C: SELECT firstName, lastName, SUM(income) FROM companyRoster ORDER BY firstName, incomeThis fixes "SORT BY" to "ORDER BY" but doesn't address the missing GROUP BY, so the query remains invalid. • Option D: SELECT firstName, lastName, SUM(income) FROM companyRosterThis removes the ORDER BY but still lacks the GROUP BY clause, making it invalid. The DA0-002 Data Analysis domain includes "applying the appropriate descriptive statistical methods using SQL queries," and adding GROUP BY fixes the aggregation error, allowing the query to run. Reference: CompTIA Data+ DA0-002 Draft Exam Objectives, Domain 3.0 Data Analysis. ==============
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Discussion
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More DA0-002 questions
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FAQ
Learn More: https://www.comptia.org/certifications
- Q1: What is the DA0-002: CompTIA Data+ Exam (2025) exam?
- A: DA0-002: CompTIA Data+ Exam (2025) is a CompTIA certification exam. Judging by the questions in our bank, it concentrates on analyst, lastname, firstname, studentid and table.
- Q2: What topics does the DA0-002: CompTIA Data+ Exam (2025) exam cover?
- A: Questions in our DA0-002: CompTIA Data+ Exam (2025) bank cluster around analyst, lastname, firstname, studentid, table, dashboard, tables and jane. Working through the full set is the quickest way to find which of these you are weakest on.
- Q3: How should I prepare for DA0-002: CompTIA Data+ Exam (2025)?
- A: Work through the DA0-002: CompTIA Data+ Exam (2025) practice questions here, checking your answer on each one, then sit the practice test to rehearse the exam under timed conditions before the real thing.
- Q4: Are these real DA0-002: CompTIA Data+ Exam (2025) exam questions?
- A: They are drawn from officially released past questions and from community members who have sat DA0-002: CompTIA Data+ Exam (2025). Answers are verified and updated weekly.
- Q5: Where do I register for the DA0-002: CompTIA Data+ Exam (2025) exam?
- A: Register through CompTIA directly. Exampractice is not affiliated with CompTIA and does not administer the exam.
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- A: Yes. Every DA0-002: CompTIA Data+ Exam (2025) page shows a free sample of real questions. Upgrading opens the full bank and the practice test.
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