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Which search matches the events containing the terms "error" and "fail"?

Which search matches the events containing the terms "error" and "fail"?
A . index=security Error Fail
B . index=security error OR fail
C . index=security “error failure”
D . index=security NOT error NOT fail

Answer: B

Explanation:

In Splunk, search queries are case-insensitive by default, meaning that it doesn’t matter whether you use uppercase or lowercase letters for the terms you’re searching for. In this case, searching for "error" or "fail" will match events containing these terms in any case (like "Error," "ERROR," "fail," or "FAIL").

The operator OR in Splunk is used to specify that you want to find events that contain at least one of the specified terms. So, error OR fail will match events that contain either "error," "fail," or both.

Option A (index=security Error Fail) would only match events that contain both "error" and "fail" since, by default, Splunk treats space-separated terms as an AND operation.

Option C (index=security “ error failure ” ) would be looking for the exact phrase "error failure," which is not the requirement here.

Option D (index=security NOT error NOT fail) is incorrect as it would exclude events containing either "error" or "fail," which is the opposite of what is needed.

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