easyMultiple Choice
FC0-U71 Practice Question: Refer to the exhibit
Network Topology
Refer to the exhibit. A user executes: SELECT AVG(Salary) FROM Employees; What is the result?
⚠ Common exam trap
Watch out — candidates often confuse AVG with SUM or MIN/MAX, leading them to pick the sum (165000) or an extreme value (50000 or 60000) instead of correctly computing the mean.
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
✓
55000
The AVG function calculates the arithmetic mean of the Salary column across all rows in the Employees table. Given the salaries 50000, 60000, and 55000, the average is (50000 + 60000 + 55000) / 3 = 55000. Therefore, option A is correct.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
55000
Why this is correct
AVG() computes the arithmetic mean of all non-NULL values in the Salary column, summing them and dividing by the row count. Given the exhibit's three salaries totalling 165000, the aggregate returns 55000, satisfying the query's requirement for a single averaged result rather than per-row output.
- ✗
50000
Why it's wrong here
AVG returns the arithmetic mean of the Salary column across all rows, not a fixed literal such as 50000. The value depends entirely on the stored data. 50000 would only be correct if the salaries happened to average exactly that.
- ✗
165000
Why it's wrong here
Averaging salaries of 165000 would require the total of all salaries divided by the row count to equal that figure, which the exhibit's values do not produce. It is tempting because it resembles a plausible high salary, but AVG returns the arithmetic mean, not a maximum or a single employee's pay.
- ✗
60000
Why it's wrong here
AVG(Salary) returns the arithmetic mean of the Salary column, not a fixed literal such as 60000. The value depends entirely on the rows present in the Employees table. 60000 is tempting because it resembles a plausible average, but the query's result cannot be predetermined without the data.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This FC0-U71 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 FC0-U71 exam.