DA0-002 Data Acquisition and Preparation Practice Question
A data analyst wants to combine first_name and last_name columns into a single full_name column in a SQL query. Which string function should be used?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
CONCAT()
CONCAT() joins two or more strings together.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
CONCAT()
Why this is correct
CONCAT() concatenates strings.
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UPPER()
Why it's wrong here
UPPER() converts to uppercase.
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LENGTH()
Why it's wrong here
LENGTH() returns string length.
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SUBSTRING()
Why it's wrong here
SUBSTRING() extracts part of a string.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DA0-002 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DA0-002 exam.