The inputlookup command is a generating command used to read the contents of a specified lookup file (such as a .csv or a KV store collection) and return the data as search results. This allows an administrator or user to view, or "validate," the entire contents of the lookup table to ensure it is loaded correctly and contains the expected data. The command must be preceded by a pipe | character when it is the first command in a search string, which is the standard syntax for initiating generating commands in the Splunk search bar.

A. | lookup products.csv The lookup command is a transforming command used to enrich existing search results with fields from a lookup file; it does not generate results directly from the file itself.
B. inputlookup products.csv This is syntactically incorrect. As a generating command that starts a search, inputlookup requires a leading pipe | character in the Splunk search bar.
D. | lookup definition products.csv This is not a valid Splunk command. The lookup command does not have a definition argument, and this syntax does not exist in the Splunk Processing Language (SPL). ---

1. Splunk Enterprise

Search Reference

Version 9.2.1

"inputlookup" command.

Section: "Syntax" and "Usage". The documentation explicitly states

"The inputlookup command is a generating command... When a search starts with a generating command

the pipe | character is a prefix for the command." This confirms that | inputlookup is the correct syntax for viewing the contents of a lookup file.

2. Splunk Enterprise

Search Manual

Version 9.2.1

"About generating commands".

Section: "Types of commands". This section clarifies that generating commands

like inputlookup

are the first command in a search and create events or data structures from scratch. It reinforces that they do not require an initial dataset and are initiated with a pipe.

3. Splunk Enterprise

Search Reference

Version 9.2.1

"lookup" command.

Section: "Description". The documentation describes lookup as a command that "Adds field values from an external source." This confirms it is used for data enrichment

not for initially loading and viewing the lookup file's contents

making option A incorrect.