Quick Answer
The correct answer is that the source field is a default metadata field and is always present in every Splunk event. This is because Splunk automatically extracts the source, sourcetype, and host fields at index time for all incoming data, making them inherent to every event regardless of the search query or data source type. On the SPLK-1002 exam, this concept tests your understanding of default fields versus extracted fields; a common trap is assuming that source only appears when explicitly searched or when the data comes from a specific file. In reality, even if you run a search for errors and don’t see source in the selected fields list, it is still present—it may simply be hidden if the fields sidebar is collapsed or filtered. Remember the memory tip: “Default three, always free”—source, sourcetype, and host are the three default fields that never disappear from an event’s metadata.
This SPLK-1002 practice question tests your understanding of using fields and lookups. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A user runs a search for errors but notices that the `source` field is not appearing in the selected fields list. What is the most likely reason?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
The field `source` is a default field and is always present.
source is a default field.
The search returned no results.
Why wrong: If no results, no fields appear, but source would be present.
The user may have closed the field sidebar.
Why wrong: Closing the sidebar hides the UI but does not remove the field.
The `source` field is only available if explicitly extracted.
Why wrong: source is automatically extracted.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
The field `source` is a default field and is always present.
Option A is correct because the `source` field is a default metadata field in Splunk, automatically extracted at index time for every event. It is always present in the selected fields list when events are returned, regardless of the search query or data source type.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
The field `source` is a default field and is always present.
Why this is correct
source is a default field.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
The search returned no results.
Why it's wrong here
If no results, no fields appear, but source would be present.
The user may have closed the field sidebar.
Why it's wrong here
Closing the sidebar hides the UI but does not remove the field.
The `source` field is only available if explicitly extracted.
Why it's wrong here
source is automatically extracted.
Common exam traps
The trap here is that candidates may think `source` is an optional or extracted field, but Splunk automatically includes it as a default metadata field for every event, so it is always available in the selected fields list when events exist.
Detailed technical explanation
Splunk automatically assigns default metadata fields (`source`, `sourcetype`, `host`, `index`, `_time`, `_raw`) at index time based on the input configuration. The `source` field is derived from the full path of the monitored file or the name of the network input, and it is always included in the field extraction process. In a real-world scenario, if a user sees the `source` field missing from the selected fields list, it typically indicates that the search returned no events or the field sidebar is not properly displayed, but the field itself is always present in indexed data.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the SPLK-1002 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Using Fields and Lookups — study guide chapter
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FAQ
Using Fields and Lookups — This question tests Using Fields and Lookups — Read the scenario before looking for a memorised answer..
The correct answer is: The field `source` is a default field and is always present. — Option A is correct because the `source` field is a default metadata field in Splunk, automatically extracted at index time for every event. It is always present in the selected fields list when events are returned, regardless of the search query or data source type.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
This SPLK-1002 practice question is part of Courseiva's free Splunk 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 SPLK-1002 exam.
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