Important Splunk SPLK-1004 Exam Questions

Answer: A

Explanation:

Comprehensive and Detailed Step by Step

The correct statement about bloom filters in Splunk is:

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Hot buckets have no bloom filters as their contents are always changing.

Here's why this is correct:

Bloom Filters : Bloom filters are data structures used by Splunk to quickly determine whether a specific value exists in a bucket. They are designed for cold and warm buckets where the data is static.

Hot Buckets : Hot buckets contain actively ingested data, which is constantly changing. Since bloom filters are precomputed and immutable, they cannot be applied to hot buckets.

Other options explained:

Option B : Incorrect because bloom filters can only return false positives (indicating a value might exist when it doesn't), but they never return false negatives.

Option C : Incorrect because all buckets use the same hashing algorithm to create bloom filters.

Option D : Incorrect because bloom filters only contain binary values (0 or 1), not trinary values.

Splunk Documentation on Bloom Filters: https://docs.splunk.com/Documentation/Splunk/latest/Indexer/Bloomfilters

Splunk Documentation on Buckets: https://docs.splunk.com/Documentation/Splunk/latest/Indexer/HowSplunkstoresindexes

Answer: C

Explanation:

The transaction command can be slow in large deployments because it requires all event data relevant to the transaction to be returned to the search head, which can be resource-intensive.

Answer: D

Explanation:

The default time limit for a subsearch to complete in Splunk is 60 seconds . If the subsearch exceeds this time limit, it will terminate, and the outer search may fail or produce incomplete results.

Here's why this works:

Subsearch Timeout : Subsearches are designed to execute quickly and provide results to the outer search. To prevent performance issues, Splunk imposes a default timeout of 60 seconds.

Configuration : The timeout can be adjusted using the subsearch_maxout and subsearch_timeout settings in limits.conf, but the default remains 60 seconds.

Other options explained:

Option A : Incorrect because 10 minutes (600 seconds) is far longer than the default timeout.

Option B : Incorrect because 120 seconds is double the default timeout.

Option C : Incorrect because 5 minutes (300 seconds) is also longer than the default timeout.

Example: If a subsearch takes longer than 60 seconds to complete, you might see an error like:

Error in 'search': Subsearch exceeded configured timeout.

Splunk Documentation on Subsearches: https://docs.splunk.com/Documentation/Splunk/latest/Search/Aboutsubsearches

Splunk Documentation on limits.conf: https://docs.splunk.com/Documentation/Splunk/latest/Admin/Limitsconf

Answer: B

Explanation:

The bin command in Splunk is used to group continuous numerical values into discrete buckets or bins. The span attribute defines the size of each bin, while the bins attribute specifies the number of bins to create.

For example:

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... | bin span=10ms bins=5 duration

This command creates 5 bins, each spanning 10 milliseconds, for the duration field.

Answer: A

Explanation:

Comprehensive and Detailed Step by Step

The default time and results limits for a subsearch in Splunk are:

Time Limit : 60 seconds

Results Limit : 10,000 results

Here's why this works:

Time Limit : Subsearches are designed to execute quickly to avoid performance bottlenecks. By default, Splunk imposes a timeout of 60 seconds for subsearches. If the subsearch exceeds this limit, it will terminate, and the outer search may fail.

Results Limit : Subsearches are also limited to returning a maximum of 10,000 results by default. This ensures that the outer search does not get overwhelmed with too much data from the subsearch.

Other options explained:

Option B : Incorrect because the results limit is 10,000, not 50,000.

Option C : Incorrect because the time limit is 60 seconds, not 300 seconds.

Option D : Incorrect because both the time limit (300 seconds) and results limit (50,000) exceed the default values.

Example: If a subsearch exceeds the default limits, you might see an error like:

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Error in 'search': Subsearch exceeded configured timeout or result limit.

Splunk Documentation on Subsearch Limits: https://docs.splunk.com/Documentation/Splunk/latest/Search/Aboutsubsearches

Splunk Documentation on limits.conf: https://docs.splunk.com/Documentation/Splunk/latest/Admin/Limitsconf