This SPLK-1002 practice question tests your understanding of using fields and lookups. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
An automatic lookup is configured but it is not enriching events. The lookup file is large (100MB) and is updated daily. What setting could improve performance?
Set `filter` in transforms.conf
Why wrong: Does not improve batch processing.
Enable `batch_index_lookup = true`
Speeds up lookups.
Increase `max_matches`
Why wrong: Could degrade performance.
Use `| lookup` instead of automatic
Why wrong: Not a setting and may be slower.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Enable `batch_index_lookup = true`
Option B is correct because enabling `batch_index_lookup = true` in transforms.conf allows Splunk to process the entire 100MB lookup file in a single batch operation rather than performing individual lookups for each event. This significantly reduces I/O overhead and improves performance for large, daily-updated lookup files by loading the entire lookup into memory once per batch.
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.
Set `filter` in transforms.conf
Why it's wrong here
Does not improve batch processing.
Enable `batch_index_lookup = true`
Why this is correct
Speeds up lookups.
Related concept
Read the scenario before looking for a memorised answer.
Increase `max_matches`
Why it's wrong here
Could degrade performance.
Use `| lookup` instead of automatic
Why it's wrong here
Not a setting and may be slower.
Common exam traps
The trap here is that candidates often confuse `batch_index_lookup` with other lookup optimizations like `filter` or `max_matches`, or assume that switching to a search-time `| lookup` command is always faster, when in fact the batch setting directly addresses the performance bottleneck of large automatic lookups.
Detailed technical explanation
Under the hood, `batch_index_lookup = true` leverages Splunk's internal batch lookup mechanism that reads the entire lookup file into a hash table or sorted list, then processes all events in a single pass. This avoids repeated disk I/O and file parsing for each event, which is critical for large files (e.g., 100MB) that are updated daily. In real-world scenarios, this setting is essential for CIDR lookups or large enrichment tables where individual lookups would cause severe search latency.
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
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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: Enable `batch_index_lookup = true` — Option B is correct because enabling `batch_index_lookup = true` in transforms.conf allows Splunk to process the entire 100MB lookup file in a single batch operation rather than performing individual lookups for each event. This significantly reduces I/O overhead and improves performance for large, daily-updated lookup files by loading the entire lookup into memory once per batch.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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