SPLK-1002 Advanced Searching and Statistics Practice Question
A Splunk search uses a subsearch to find the top 10 client IPs and then retrieve all events from those IPs. The subsearch is:
`index=web sourcetype=access | search [ top clientip | fields clientip ]`
What does this search return?
⚠ Common exam trap
Candidates often confuse the output of the subsearch (a table of IPs) with the final output of the entire search, failing to recognize that the outer search returns all matching events, not just the top IPs.
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
✓
All events from the top 10 most common client IPs.
The subsearch `[ top clientip | fields clientip ]` returns the top 10 most common client IPs as a list of values. The outer search then uses this list as a filter, effectively running `index=web sourcetype=access clientip=<ip1> OR clientip=<ip2> ...`. This retrieves all events from those IPs, not just the top 10 events. Option D correctly describes this behavior.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The top 10 client IPs in a table.
Why it's wrong here
The outer search returns events, not just IPs.
- ✗
Only the top 10 events based on some field.
Why it's wrong here
The outer search returns events, not summarized.
- ✗
All events where the client IP appears more than once.
Why it's wrong here
Not specifically; top 10 are most common, but not necessarily more than once.
- ✓
All events from the top 10 most common client IPs.
Why this is correct
The subsearch finds the top 10 client IPs, then outer search filters events matching those IPs.
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Same concept, more angles
2 more ways this is tested on SPLK-1002
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Which THREE of the following are valid ways to create a subsearch in SPL? (Choose three.)
medium- A.... | join type=inner [search index=other]
- ✓ B.... | map search="search index=other $field$"
- C.[return index=main | stats count]
- ✓ D.[search index=main | stats count]
- ✓ E.... | append [search index=other]
Why B: The `map` command in SPL allows you to run a subsearch for each result of the outer search, using field values from the outer result (e.g., `$field$`) to dynamically construct the inner search. This is a valid way to create a subsearch that iterates over search results, making it a legitimate subsearch pattern in Splunk.
Variation 2. A search uses the map command to run a search for each value of a field. The search is taking a very long time. Which alternative approach is recommended for better performance?
hard- A.Use the sort command
- ✓ B.Use a subsearch with the IN operator instead
- C.Use the transaction command
- D.Use the foreach command to loop over fields
Why B: Replacing a `map` command with a subsearch using the `IN` operator allows Splunk to retrieve all matching field values in a single search pass, rather than executing a separate search for each value. The `map` command runs one search per input row, which can cause significant overhead and slow performance, especially with large result sets. Using `IN` in a subsearch collects the values first and then applies them as a filter in the outer search, reducing the number of search operations to one.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.