Splunk SPLK-1002 Practice Test - Questions Answers, Page 23

The correct answer is

A) Field alias123.

In Splunk, a field alias is a knowledge object that you can use to assign an alternate name to a field3. This can be particularly useful when you want to normalize your data to comply with the Splunk Common Information Model (CIM)12.

The CIM provides a methodology for normalizing values to a common field name1. It acts as a search-time schema to define relationships in the event data while leaving the raw machine data intact2. By using field aliases, you can map vendor fields to common fields that are the same for each data source in a given domain4. This allows you to correlate events from different source types by normalizing these different occurrences to a common structure and naming convention1.

In Splunk, you can create an event type from the search window by running a search that would make a good event type, then clickingSave Asand selectingEvent Type1.This opens theSave as Event Typedialog, where you can provide the event type name and optionally apply tags to it1.

You can also create an event type by editing theeventtypes.conffile and adding a new stanza1.Each stanza in theeventtypes.conffile represents an event type1.The stanza name is the name of the event type, and thesearchattribute specifies the search string that defines the event type1.

It's important to note that while you can use theeventtypecommand in a search to find events associated with a specific event type, adding| eventtypeto the SPL and executing the search does not create a new event type1.Similarly, clickingEvent Actions > Build Event Typein an event's detail dropdown does not create a new event type1.

The transaction command groups events that share a common value in a specified field, such as JSESSIONID, and that occur within a specified time range. The search command filters the results to show only the events that match the given value of JSESSIONID.This search groups the events by JSESSIONID and then shows only the events that have the value SD462K101C2F267 for JSESSIONID2

1: Splunk Core Certified Power User Track, page 9.2: Splunk Documentation, transaction command.

The Splunk Common Information Model (CIM) is an app that contains a set of predefined data models that apply a common structure and naming convention to data from any source. The CIM enables you to use data from different sources in a consistent and coherent way. The CIM contains 28 pre-configured datasets that cover various domains such as authentication, network traffic, web, email, etc. The data models included in the CIM are configured with data model acceleration turned on by default, which means that they are optimized for faster searches and analysis. Data model acceleration creates and maintains summary data for the data models, which reduces the amount of raw data that needs to be scanned when you run a search using a data model.

: Splunk Core Certified Power User Track, page 10. : Splunk Documentation, About the Splunk Common Information Model.

When defining a search macro, the required elements are the name and the definition of the macro. The name is a unique identifier for the macro that can be used to invoke it in other searches. The definition is the search string that the macro expands to when referenced.The arguments, validation expression, and validation error message are optional elements that can be used to customize the macro behavior and input validation2

1: Splunk Core Certified Power User Track, page 9.2: Splunk Documentation, Define search macros in Settings.

The span option is used to specify the time span for the timechart command. The span value can be a number followed by a time unit, such as h for hour, d for day, w for week, etc. The span value determines how the data is grouped into time buckets. For example, span=12h means that the data is grouped into 12-hour intervals.The timespan option is not a valid option for the timechart command2

1: Splunk Core Certified Power User Track, page 9.2: Splunk Documentation, timechart command.

The transaction and stats commands are two ways to group events from one or more data sources based on common fields or time ranges. The transaction command creates a single event out of a group of related events, while the stats command calculates summary statistics over a group of events. The eval and coalesce commands are used to create or combine fields, not to group events. The format command is used to format the results of a subsearch, not to group events.The top and rare commands are used to rank the most or least common values of a field, not to group events23

1: Splunk Core Certified Power User Track, page 9.2: Splunk Documentation, transaction command.3: Splunk Documentation, stats command.

Tags are a type of knowledge object that enable you to assign descriptive keywords to events. Tags can reference any of the following knowledge objects: extracted fields, field aliases, calculated fields, lookups, and event types. Tags cannot reference other tags or search macros.Tags are applied to events at search time based on the values of the fields that they reference2

1: Splunk Core Certified Power User Track, page 10.2: Splunk Documentation, About tags and aliases.