Quick Answer
The answer is the `eval` command, which is the correct choice because it allows you to create a new field by evaluating an expression, such as using the `if` function combined with `like()` or `match()` to test whether the IP address contains a colon (indicating IPv6) or a dot (indicating IPv4). This enables you to categorize each event’s IP type into a new field like `ip_type` without altering the original data. On the Splunk Core Certified User SPLK-1002 exam, this question tests your ability to use `eval` for conditional field creation, a common scenario when you need to classify or transform data for aggregation. A frequent trap is confusing `eval` with `rex` or `fields`; remember that `eval` creates new fields from existing ones using functions, while `rex` extracts patterns and `fields` only retains or removes fields. Memory tip: think of `eval` as the Swiss Army knife for field creation—when you need to “if” your way to a new category, `eval` is your tool.
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 search returns events with a field 'ip' that contains both IPv4 and IPv6 addresses. An analyst wants to count events for each IP type (IPv4 vs IPv6). Which command should be used to create a new field that categorizes the IP type?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
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
Why wrong: fields selects existing fields.
convert
Why wrong: convert changes data types, not categorizes.
eval
eval can create a new field with conditional logic.
rex
Why wrong: rex extracts fields from raw text, does not categorize.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
eval
Option C is correct because the `eval` command can create a new field by evaluating an expression, such as using the `if` function with `like()` or `match()` to test whether the IP address contains a colon (IPv6) or a dot (IPv4). This allows the analyst to categorize each event's IP type into a new field like `ip_type` without altering the original data.
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
Why it's wrong here
fields selects existing fields.
convert
Why it's wrong here
convert changes data types, not categorizes.
eval
Why this is correct
eval can create a new field with conditional logic.
Clue confirmation
The clue word "which command" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
rex
Why it's wrong here
rex extracts fields from raw text, does not categorize.
Common exam traps
The trap here is that candidates often confuse `rex` with `eval` because both can manipulate fields, but `rex` only extracts existing patterns into new fields, whereas `eval` can create fields based on conditional logic or calculations.
Detailed technical explanation
The `eval` command supports functions like `if(match(ip, "^[0-9.]+$"), "IPv4", "IPv6")` to classify IP addresses, where `match()` uses PCRE regex. IPv4 addresses are 32-bit and typically dotted decimal, while IPv6 addresses are 128-bit and use colons; the presence of a colon is a reliable differentiator. In real-world scenarios, analysts might also use `cidrmatch()` for subnet classification, but for simple type detection, a regex check on the colon is efficient.
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: eval — Option C is correct because the `eval` command can create a new field by evaluating an expression, such as using the `if` function with `like()` or `match()` to test whether the IP address contains a colon (IPv6) or a dot (IPv4). This allows the analyst to categorize each event's IP type into a new field like `ip_type` without altering the original data.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
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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