Quick Answer
The correct answer is to use `sort _time | dedup user`. This sequence works because `dedup` always keeps the first event it sees for each unique value of the specified field, so by sorting events by `_time` in ascending order before deduplication, you ensure that the earliest timestamped event for each user is retained. On the Splunk SPLK-1003 exam, this question tests your understanding of command order and how `dedup` interacts with data flow—a common trap is applying `dedup` first, which would keep whichever event appears first in the raw results, not necessarily the earliest by time. The search intent "dedup after sort to keep first occurrence" is a core pattern for deduplicating time-series data while preserving the oldest record. A helpful memory tip: think "Sort first, then dedup—oldest stays up."
This SPLK-1003 practice question tests your understanding of advanced searching and statistics. 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 search returns duplicate events for the same user. The analyst wants to keep only the first occurrence of each user based on timestamp. Which sequence of commands is best?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
sort -_time | dedup user
Why wrong: Sort descending keeps the latest event first, so dedup keeps the most recent.
dedup user
Why wrong: Dedup without sort keeps the first event it encounters, which may not be the earliest.
dedup user | sort _time
Why wrong: Sorting after dedup does not change which event is kept.
sort _time | dedup user
Sort ascending puts earliest first, then dedup keeps the first (earliest) per user.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
sort _time | dedup user
Option D is correct because it first sorts events by timestamp in ascending order (oldest first), then applies `dedup user` to keep only the first occurrence of each user. Since `dedup` retains the first event it encounters for each field value, sorting by `_time` ensures that the earliest event for each user is kept, satisfying the requirement to keep only the first occurrence based on timestamp.
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.
sort -_time | dedup user
Why it's wrong here
Sort descending keeps the latest event first, so dedup keeps the most recent.
dedup user
Why it's wrong here
Dedup without sort keeps the first event it encounters, which may not be the earliest.
dedup user | sort _time
Why it's wrong here
Sorting after dedup does not change which event is kept.
sort _time | dedup user
Why this is correct
Sort ascending puts earliest first, then dedup keeps the first (earliest) per user.
Clue confirmation
The clue words "best", "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Splunk often tests the order of operations in piped commands, specifically that `sort` must precede `dedup` to control which event is kept, and that `-` before a field name reverses the sort order, which candidates may misinterpret.
Detailed technical explanation
The `dedup` command in Splunk processes events in the order they are received and retains the first event for each combination of dedup fields. When combined with `sort`, the sort must occur before `dedup` to control which event is considered 'first'. In Splunk, `_time` is a metadata field representing the event timestamp, and sorting by `_time` (ascending) ensures that the earliest event for each user is the one retained by `dedup`. A real-world scenario is session tracking where you need the first login time per user from a stream of login events; without pre-sorting, you might keep a later login if the events arrive out of order.
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-1003 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.
Advanced Searching and Statistics — study guide chapter
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FAQ
Advanced Searching and Statistics — This question tests Advanced Searching and Statistics — Read the scenario before looking for a memorised answer..
The correct answer is: sort _time | dedup user — Option D is correct because it first sorts events by timestamp in ascending order (oldest first), then applies `dedup user` to keep only the first occurrence of each user. Since `dedup` retains the first event it encounters for each field value, sorting by `_time` ensures that the earliest event for each user is kept, satisfying the requirement to keep only the first occurrence based on timestamp.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "best", "first". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
This SPLK-1003 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-1003 exam.
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