Quick Answer
The answer is `dedup transaction_id`. This command is correct because the `dedup` function in Splunk removes duplicate events based on the specified field, keeping only the first occurrence by default—exactly what is needed when you want to eliminate redundant events while preserving the earliest instance of each unique `transaction_id`. On the Splunk Core Certified User SPLK-1002 exam, this question tests your understanding of data deduplication commands and their default behavior, often appearing in scenarios where you must filter out repeated log entries or transaction records. A common trap is confusing `dedup` with `stats` or `sort`, but remember that `dedup` is the direct, single-command solution for removing duplicates without aggregation. For a quick memory tip, think of the phrase “dedup first, keep the first”—the command’s default action is to retain the initial occurrence, so no extra options like `sort` are needed.
This SPLK-1002 practice question tests your understanding of basic searching and transforming commands. 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 wants to remove duplicate events based on the 'transaction_id' field, keeping only the first occurrence. Which command is appropriate?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
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.
Clue: "which command"
Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
fields - transaction_id
Why wrong: Removes the field, not duplicates.
sort transaction_id | dedup transaction_id
Why wrong: Works but not necessary; dedup itself handles ordering.
dedup transaction_id
Removes duplicates based on field.
uniq transaction_id
Why wrong: uniq requires adjacent duplicates.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
dedup transaction_id
The `dedup` command removes duplicate events based on specified fields, keeping only the first occurrence by default. Since the user wants to keep the first occurrence of each unique `transaction_id`, `dedup transaction_id` is the correct and simplest approach.
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.
fields - transaction_id
Why it's wrong here
Removes the field, not duplicates.
sort transaction_id | dedup transaction_id
Why it's wrong here
Works but not necessary; dedup itself handles ordering.
dedup transaction_id
Why this is correct
Removes duplicates based on field.
Clue confirmation
The clue words "first", "which command" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
uniq transaction_id
Why it's wrong here
uniq requires adjacent duplicates.
Common exam traps
The trap here is that candidates often confuse `dedup` with `uniq`, not realizing that `uniq` only removes consecutive duplicates and requires sorted input, while `dedup` works on any field and does not require prior sorting.
Detailed technical explanation
The `dedup` command internally processes events in the order they are received (or after any preceding pipe commands) and keeps the first event for each unique combination of the specified fields. If you need to control which event is considered the 'first' (e.g., based on a timestamp), you should sort the events before using `dedup`. In Splunk, `dedup` can also accept options like `sortby` to define the order for choosing which duplicate to keep.
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.
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FAQ
Basic Searching and Transforming Commands — This question tests Basic Searching and Transforming Commands — Read the scenario before looking for a memorised answer..
The correct answer is: dedup transaction_id — The `dedup` command removes duplicate events based on specified fields, keeping only the first occurrence by default. Since the user wants to keep the first occurrence of each unique `transaction_id`, `dedup transaction_id` is the correct and simplest approach.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "first", "which command". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
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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