Last updated on Nov 17, 2023
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
Ans: Splunk is primarily used to make machine data accessible, usable, and useful to everyone. It also aids in the examination of the massive volume of machine data generated by technology infrastructure and IT systems in virtual, physical, and cloud environments.
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Ans: Most firms are investing in this new tech because it allows them to examine their end-to-end systems, avoid service outages, and gain real-time key insight into customer service experience, core business metrics, and transactions.
Ans: There are no specific prerequisites for taking Splunk Administration training, but desired aspirants with subject knowledge skills in system administration, Linux, Windows, and so on will have an advantage.
Ans: Aspirants who want to become Splunk Administration experts in today's IT world can enroll in this course. IT employees, data security professionals, business analytics professionals, Splunk beginners, and Big Data technology experts can all benefit from taking the course.
Ans: Splunk Free is a totally free Splunk version. It's a free license that never expires and allows you to index 500 MB per day. If the users require a larger amount of data, an Enterprise license can be purchased.
Ans: The Splunk configuration files are the main brains behind Splunk's operation, controlling the entire behavior of Splunk. All of the files are saved with the.conf extension and can be easily edited or read with the appropriate access.
Ans: When compared to other techniques, Splunk's Administration career is incredibly profitable, with experts earning the best earning pay scale. Splunk careers offer a wide range of job opportunities, including system engineers, software engineers, programmer analysts, security professionals, solutions architects, and technology consulting managers.
Ans: Splunk administration is up against tough opposition in order to determine validity, improve business intelligence, and provide security and managing IT operations.
Ans: Splunk administration is regarded as an excellent tool for providing visibility into data generated by machines such as hardware devices, IoT devices, servers, and other sources. It can be used for evaluating machine data quickly and easily because it helps to provide important insight into IT operations.
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Ans: Splunk administration is built around three main components: forwarded, indexer, and search head.
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Ans: The deployment server seems to be more effective, and it likely controls the host-independent implications, path naming conventions, and machine naming conventions from a central location.
Ans: Splunk administration might very well support a variety of authentication systems, including Splunk internal authentication with role-based user access, LDAP, a scripted authentication API for use with an external authentication system, such as PAM or RADIUS, multi factor authentication, and single sign-on.
Ans: The Splunk cloud administrator will handle the majority of the tasks in order to make the best use of the data.
Ans: Splunk can be thought of as a platform that makes data available to users. Data generated by hardware devices, networks, servers, and other sources can be easily viewed. Splunk administration aids in the analysis of large amounts of data that are used in a variety of IT operations, security, threat detection, and fraud detection. Splunk is a critical data analytics tool used in businesses.
Ans: You can clear the search history by deleting ‘$splunk home/var/log/splunk/searches.log' from the Splunk server.
Ans: To disable the message service, set a value like ‘OFFENSIVE=Less in splunk launch.conf' on the platform
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Certain features of the platforms are missing in the free version, such as
1. Authentication and pre-programmed searches
2. Dispersed search
3. Platform deployment management
4. Data forwarding into TCP or HTTP
Ans: This platform license is in charge of ensuring that the appropriate amount of data is submitted to the index. The license is activated based on the amount of data that flows into it within 24 hours. It also helps to ensure that the platform's environment stays within the volume of data that it receives.
Ans: Splunk enterprise installation must be kept private, and you must verify the hardware compatibility so that the framework can be implemented efficiently. Following verification, you could indeed install the organization on operating systems like windows, Linux, MoS, and others. Furthermore, you can upgrade the enterprise when necessary.
Ans: To explore or adjust the current LDAP configurations, follow these steps: Under users & authentication, click the access control button. Then click LDAP, and from the resulting page, you can easily control specific strategies, view information, and track the LDAP mappings to Splunk roles.
Ans. The following are the commonly used port numbers by the platform Splunk.:-
Ans: Splunk forwarder is a component of Splunk architecture that acts as an agent to collect logs from the remote machines. It forwards these logs to the indexer for storage and further processing. The following are the two types of Splunk Forwarders:-
Universal Forwarder - A Universal Forwarder in Splunk is the best forwarder to send the raw data to an indexer without processing. It performs initial processing and data analysis before sending it to the indexer.
Heavy Forwarder - It is a heavy component that helps to process and filter the required data. Using a heavy forwarder can resolve many problems as it processes data at the source before forwarding the same to the indexer.
Ans: Alerts in Splunk are the actions that are triggered when certain user-defined conditions are met. However, there are three different types of Splunk alerts available.
Scheduled alerts are mainly based on a historical search that runs on the schedule opted based on the set timing.
Rolling window alerts are hybrid alerts based on real-time searches. It examines all the events and states a specific time when a particular event meets a window.
Pre-result alerts are the most common type of Splunk alerts that run overall time.
Ans: Splunk Indexer is a Splunk component that helps to build and manage indexes. Further, it indexes and stores the incoming data from the forwarder. The indexer helps to transform the incoming data into various events and stores the same within indexes to execute search operations effectively.
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Splunk platform is useful for collecting huge amounts of machine-generated data and supports easy integration with Hadoop. It also makes it available for access to a large audience. Also, it works in a streaming mode.
Spark is an open-source software used for big data processing. It is mostly used with Apache projects and works on both streaming and batch mode.
Ans: Splunk has three different versions- Splunk Enterprise, Splunk Light, and Splunk Cloud. Let us know more about these Splunk versions,
Ans: The following are the different types of Splunk Licenses available.
Ans: There are various search modes that the Splunk platform holds, such as.
Ans: Splunk app is a directory comprising configurations, dashboards, search results, etc., within Splunk.
Ans: The following are the most important configuration files in the Splunk platform.
Ans: The following are the most important search commands in Splunk.
Ans: MapReduce is a programming model that helps in processing large data sets. In Splunk, this algorithm is useful for fast data searching. Moreover, it helps to process large data sets through a parallel and distributed algorithm on a cluster.
Conclusion:
In the above blog post we had covered all the important splunk admin interview questions 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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