What Are the Possible Return Values of Splunk's typeof Function?
Short answer
B Number, String, Bool
Question
Key Takeaways
The exam tests exact recall of Splunk's typeof type strings—the trap is selecting Null instead of Bool because Null is not a data type return in Splunk.
Learn the possible string results returned by the Splunk typeof function for your SPLK-1004 exam. Most candidates confirm the correct answers are Number, String, and Bool, while Null is a common misconception.
Common mistake: Choosing C (Number, String, Null) is the most common mistake. Candidates confuse Splunk's typeof with SQL or other programming languages where Null is a type, but Splunk returns Bool for boolean values.
Expert Analysis
Why the Answer Is Correct
The typeof function in Splunk returns a string that identifies the data type of an argument. According to Splunk Fundamentals 3 (page 58) and the official Search Reference, the possible results are Number, String, or Bool. Comment [2] explicitly cites this source, and comment [1] links to the official docs. The example in the docs returns NumberStringBoolInvalid, confirming that Number, String, and Bool are the type names. Therefore, option B is correct.
Why the Other Options Are Wrong
Option A lists True, False, Unknown, which are values, not type strings. Option C includes Null, which is not a return value for typeof in Splunk; instead, boolean values are returned as Bool. Option D lists Field, Value, Lookup, which are concepts related to field operations, not data types. None of these alternatives match the documented return strings.
Community Comment Notes
The community voted overwhelmingly for B, with all votes (100%) supporting it. Comments [1] and [2] provide authoritative references. However, comments [3] and [4] argue for C, likely due to a misunderstanding of Splunk's typeof output. The official documentation clarifies that Null is not a data type returned by this function; an invalid argument returns Invalid rather than Null. For exam purposes, trust the documented list.
Official Reference
- https://docs.splunk.com/Documentation/Splunk/latest/SearchReference/InformationalFunctions
- https://docs.splunk.com/Documentation/Splunk/latest/SearchReference/Typeof
- https://docs.splunk.com/Documentation/SCS/current/SearchReference/InformationalFunctions
These links open the official vendor documentation in a new tab.
Exam Strategy
Memorize the exact return strings of common SPL functions such as typeof (Number, String, Bool). When a question asks about 'potential results', look for the exact list from official Splunk documentation and be wary of adding language-specific types like Null.
Community Votes
100% of anonymous learners picked answer B. Votes are pick records left by other test-takers — they are not the verified answer.
Discussion 5 contributions
Compiled from public community threads and reader submissions, lightly edited for clarity. Handles and vote tallies are shown as recorded, and comments reflect the views of individual contributors.
From public community threads 5
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slayqueeenslay 👍 1 Answered BIts B, Splunk Fundementals 3 page 58 says: typeof: returns a string that represents the data type of X – Possible results: number, string, or bool
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Derag 👍 1Its B. The following example takes one argument and returns a string representation of its type. This example returns "NumberStringBoolInvalid"
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Soccerfan 👍 1B - https://docs.splunk.com/Documentation/SCS/current/SearchReference/InformationalFunctions
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poorisubash 👍 1The answer is C. C. Number, String, Null
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adamsca 👍 1Ans is C C. Number, String, Null
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