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Splunk is regarded as one of the best load reporting and planning tools in the IT industry. This is one of the leading analytics and Big Data tools, and Splunk professionals are in limited supply in the business world. If you want to be a successful Big Data professional, you must have specialist skills and knowledge in Splunk.
As a result, competitive rivalry for Splunk jobs is fierce in the market. We have compiled a list of Splunk interview questions and answers with the assistance of industry professionals to help you prepare for your interview. The splunk interview questions are divided into 3 sections, basic, intermediate and advanced based on the level of difficulty. Look over the following Splunk interview questions and prepare to ace your interview.
Ans: A Splunk app is a container/directory of Splunk configurations, searches, dashboards, and so on.
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Splunk Free lacks the following features:
Ans: If the license master is not available, the license slave will start a 24-hour timer, after which the license slave's search will be blocked (though indexing continues). Users will not be able to search for data in that slave until it can reconnect to the license master.
Ans: The default Splunk index is a summary index (the index that Splunk Enterprise uses if we do not indicate another one).
We may need to create additional summary indexes if we intend to run a variety of summary index reports.
Ans: Splunk DB Connect is a Splunk SQL database plugin that allows us to easily integrate database data with Splunk queries and reports.
Ans: $splunkhome/etc/system/default
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Ans: Splunk Forwarders are classified into two types, as shown below:
Ans: Splunk 8.2.1 is a search engine (as of June 21, 2021)
Ans: Splunk Indexer is the component of Splunk Enterprise that creates and manages indexes. An indexer's primary functions are as follows:
Ans: This is one of the most common Splunk interview questions. Splunk's components are listed below:
Ans: Splunk is the "Google" of machine-generated data. This is an application which can be used to search, visualize, monitor, and report on our enterprise data. Splunk transforms valuable machine data into powerful operational intelligence by providing real-time insights into our data via charts, alerts, reports, and so on.
Ans: The most common port numbers used by the splunk are:
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It's another commonly asked splunk interview question that will put Developer or Engineer knowledge to the test. The transaction command is most useful in two situations:
In the other cases, statistics are usually preferable.
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We could indeed extract the IP address from logs in a variety of ways. Here are some examples:
With the help of a regular expression:
rex field= raw "(?ip address>d+.d+.d+.d+.d+.d+.d+)" OR
rex field= raw "(?ip address>([0-9]1,3[.])3[0-9]1,3]0-9]1,3]0-9]1,3]0-9]1,3]0-9]1,3]0-9]1,3]0-9]1,3]0-9]1,3]0-9]1,3]0-9]1,3]0-9]1,3]0
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Ans: The answer to this question would be extremely broad, but an interviewer would primarily be looking for the following keywords:
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Splunk stores indexed data in directories known as ‘buckets.' It is a physical directory that contains events from a specific time period.As it ages, a bucket goes through several stages. The following are the stages it goes through:
The buckets have been located in the following locations by default:
$SPLUNK HOME/var/lib/splunk/defaultdb/db
We should be able to see the hot-db and any warm buckets there. Splunk's default bucket size is 10 GB for 64-bit systems and 750 MB for 32-bit systems.
Ans: The stats command generates summary statistics for all existing fields in the search results and saves them as new field values.Eventstats is similar to stats in that the aggregation results are added inline to each event and only if the aggregation is relevant to that event. The eventstats command, like stats, computes requested statistics but aggregates them to the original raw data.
Ans: Splunk's direct competitors include Logstash, Loggly, LogLogic, Sumo Logic, and others.
Ans: Splunk licenses limit the amount of data we can index per calendar day.
Ans: In terms of licensing, one day for Splunk is defined as midnight to midnight on the license master's clock.
Ans:They come standard with Splunk. Therefore, there is no need to purchase it separately.
Ans: This is another common interview question about Splunk commands. Learn everything there is to know about commands. Using the following command, we can restart the Splunk web server.
Ans:The Splunk Daemon can be restarted using the following command:
Splunk start splunkd
Ans: If we want to inspect the Splunk Enterprise processes that are currently running on Unix/Linux, we can use the following command:
ps aux | grep splunk
Ans: To get Splunk up and running, run the following command:
$SPLUNK_HOME/bin/splunk enable boot-start
Ans: We can use the following commands to disable Splunk boot-start:
$SPLUNK_HOME/bin/splunk disable boot-start
Ans: Splunk uses source type to identify data.
Ans: Resetting the Splunk Admin password is dependent on the Splunk version. If we are using Splunk 7.1 or higher, we must perform the following steps:
Ans: $SPLUNK_HOME/etc/system/local/
We will need to use the following command in the file (instead of ‘NEW PASSWORD,' we will enter our own new password):
[user_info]
PASSWORD = NEW_PASSWORD
After that, we can simply restart Splunk Enterprise and log in with the new password.
Now, if we are using a version prior to 7.1, we will do the following:
Ans: Set value OFFENSIVE=Less in splunk_launch.conf
Ans: We can delete the following file from the Splunk server to clear the Splunk search history:
$splunk_home/var/log/splunk/searches.log
Ans: Splunk Btool seems to be a command-line tool that allows us to troubleshoot configuration file issues or simply see what values our Splunk Enterprise installation is using in the current environment.
Ans: Both contain preconfigured configuration, reports, and so on, but the Splunk add-on does not have a visual app. A Splunk app, on the other hand, comes with a preconfigured visual app.
Ans: The order of precedence for files is as follows:
Ans: At the default location, Fishbucket is a directory or index:
/opt/splunk/var/lib/splunk
It contains seek pointers and CRCs for the files that were indexed so that ' splunkd' can tell us if it's already read them. We can find it in the GUI by searching for:
index=_thefishbucket
Ans: This is accomplished by defining a regex to match the required event(s) and sending everything else to NullQueue. Here's a simple example that excludes all events that contain the string login:
In Props.conf:
[source::/var/log/foo]
# Transforms must be applied in this order
# to make sure events are dropped on the
# floor prior to making their way to the
# index processor
TRANSFORMS-set= setnull,setparsing
In Transforms.conf;
[setnull] REGEX = . DEST_KEY = queue FORMAT = nullQueue
[setparsing]
REGEX = login
DEST_KEY = queue
FORMAT = indexQueue
Ans: This is something we can figure out:
By real-time monitoring of data from Splunk's metrics log:
index="_internal" source="*metrics.log" group="per_sourcetype_thruput" series="
eval MB=kb/1024 | chart sum(MB)
By watching everything split by source type:
index="_internal" source="*metrics.log" group="per_sourcetype_thruput" | eval MB=kb/1024
Since we are having problems with a data input and want to troubleshoot it, especially if our whitelist/blacklist rules are not working as expected, we will go to the URL:
https://yoursplunkhost:8089/services/admin/inputstatus
Ans: In Splunk Enterprise 6.0, we must use ‘ui-prefs.conf' to accomplish this. If we set the value to the following, it will be the default setting for all of our users:
$SPLUNK_HOME/etc/system/local
For example, if our
$SPLUNK_HOME/etc/system/local/ui-prefs.conf file
includes:
[search]
dispatch.earliest_time = @d
dispatch.latest_time = now
The search app's default time range for all users will be today.
The ui-prefs.conf configuration file is referenced here: http://docs.splunk.com/Documentation/Splunk/latest/Admin/Ui-prefsconf
Ans: $SPLUNK_HOME/var/run/splunk/dispatch
Includes a directory for every search that's also actually running or which has been completed. A directory decided to name 1434308943.358, for instance, will encompass a CSV file containing the search results, a search.log containing details about the search execution, and other files. Using the defaults (which we can change in limits.conf), these directories will be deleted 10 minutes after the search is finished—unless the user saves the search results, in which case they will be deleted after 7 days.
Ans: Both are Splunk features that ensure the high reliability of Splunk search heads in the event that any search head fails. However, the search head cluster is new, and search head pooling will be removed in future versions.
A captain commands the search head cluster, and the captain commands its slaves. The search head cluster outperforms the search head pooling in terms of dependability and efficiency.
Ans: The following are the steps for adding folder access logs to Splunk:
Ans: Splunk's fast information searching is made possible by the MapReduce algorithm. It is a common algorithm for batch-based large-scale parallelization. It is inspired by the map() and reduce() functions in functional programming.
Ans: Splunk's operatio16)n can be divided into three major parts:
Ans: Splunk data models are being used when it is important to process large amounts of unstructured data and start creating a comprehensive structure without running complex search queries on the data. Data models are widely used in the creation of sales reports, the addition of access levels, and the creation of an authorization framework for different applications.
Pivots, but on the other hand, allow you to create various viewpoints and then see the results as you need them. Even non-technical supervisors of stakeholders could indeed create views and obtain more information about their departments using pivots.
Ans: Splunk offers three different types of dashboards:
Ans: The command for starting Splunk service:
./splunk start
The command for stopping Splunk service:
./splunk stop
In the above blog post we had covered all the important splunk interview questions for all levels. These questions help the individuals to crack the interview process easily. If you found anything not covered please drop your query in the comments section to get them answered.
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