easyMultiple ChoiceObjective-mapped
FC0-U71 A developer sees the above error message Practice Question
Exhibit
Refer to the exhibit. ``` Error: NullReferenceException at line 45 in Calculate.cs ```
A developer sees the above error message. What type of error is this?
⚠ Common exam trap
CompTIA often tests the distinction between compile-time and runtime errors by presenting a scenario where an error message appears during execution, leading candidates to confuse it with a syntax or compile error because they focus on the error message itself rather than when it occurs.
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
✓
Runtime error
D is correct because a runtime error occurs when a program is executing and encounters an unexpected condition, such as division by zero, null pointer dereference, or an unhandled exception. The error message shown (not provided here but implied) typically appears during program execution, not during compilation or syntax checking. Runtime errors are distinct from compile-time errors because they only manifest when the code is actually running.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Syntax error
Why it's wrong here
Syntax errors are caught by the compiler before execution.
- ✗
Compile error
Why it's wrong here
Compile errors prevent the program from compiling.
- ✗
Logic error
Why it's wrong here
Logic errors do not throw exceptions; they produce incorrect output.
- ✓
Runtime error
Why this is correct
NullReferenceException occurs at runtime when an object is null.
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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.