The correct answer is `| lookup employee_lookup emp_id OUTPUTNEW employee_name`. This syntax is correct because `OUTPUTNEW` instructs Splunk to add the lookup field `employee_name` only if it does not already exist in the event, preventing accidental overwrites of any pre-existing data. In contrast, `OUTPUT` would overwrite any existing field with the same name, which is unnecessary here since the events already contain the `emp_id` field and only need the name appended. On the Splunk Core Certified User SPLK-1002 exam, this distinction between `OUTPUTNEW` and `OUTPUT` is a frequent trap—candidates often confuse the two, but the key is that `OUTPUTNEW` is the safer, non-destructive option when you want to add fields without risking data loss. A common memory tip: think of `OUTPUTNEW` as "output only if it's new" to avoid overwriting existing values.
SPLK-1002 Using Fields and Lookups Practice Question
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 lookup table contains employee names and IDs. An admin wants to add the employee name to events that contain an employee ID field called 'emp_id'. What is the correct lookup command syntax?
Option D is correct because the `OUTPUTNEW` clause in a lookup command only adds fields from the lookup table that are not already present in the event, preventing overwriting of existing field values. In this scenario, the admin wants to add the employee name to events that already contain an `emp_id` field, so `OUTPUTNEW employee_name` ensures the name is appended without modifying any existing data.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
| lookup employee_lookup employee_name FROM emp_id
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Splunk often tests the distinction between `OUTPUT` and `OUTPUTNEW` in lookup commands, and the trap here is that candidates may choose `OUTPUT` (option C) thinking it simply adds the field, without realizing it will overwrite any existing field with the same name.
Trap categories for this question
Command / output trap
OUTPUTNEW * outputs all fields, but may conflict.
Detailed technical explanation
How to think about this question
The `lookup` command in Splunk uses the `OUTPUT` clause to overwrite existing fields and `OUTPUTNEW` to only add fields that are not already present, which is critical when merging data from lookups with event data that may already contain the same field names. Under the hood, Splunk performs a left outer join between the event data and the lookup table based on the specified field(s), and the `OUTPUTNEW` modifier ensures that only non-conflicting fields are appended, preserving data integrity in scenarios like enrichment without duplication.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
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
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Using Fields and Lookups — This question tests Using Fields and Lookups — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: | lookup employee_lookup emp_id OUTPUTNEW employee_name — Option D is correct because the `OUTPUTNEW` clause in a lookup command only adds fields from the lookup table that are not already present in the event, preventing overwriting of existing field values. In this scenario, the admin wants to add the employee name to events that already contain an `emp_id` field, so `OUTPUTNEW employee_name` ensures the name is appended without modifying any existing data.
What should I do if I get this SPLK-1002 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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