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| Section | Weight | Objectives |
|---|---|---|
| Common Information Model (CIM) | 10% | - Data normalization
|
| Field Aliases and Calculated Fields | 10% | - Field enrichment
|
| Data Models | 10% | - Data model concepts
|
| Filtering and Formatting Results | 10% | - Search and evaluation commands
|
| Using Transforming Commands for Visualizations | 5% | - Visualization commands
|
| Correlating Events | 15% | - Event correlation techniques
|
| Workflow Actions | 10% | - Workflow action types
|
| Tags and Event Types | 10% | - Knowledge objects
|
| Creating and Managing Fields | 10% | - Field extraction methods
|
| Macros | 10% | - Search macros
|
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問題 #201
Which field will be used to populate the field if the productName and product:d fields have values for a given event?
| eval productINFO=coalesco(productName,productid)
答案:B
解題說明:
Explanation
The correct answer is B. The value for the productName field because it appears first.
The coalesce function is an eval function that takes an arbitrary number of arguments and returns the first value that is not null. A null value means that the field has no value at all, while an empty value means that the field has a value, but it is "" or zero-length1.
The coalesce function can be used to combine fields that have different names but represent the same data, such as IP address or user name. The coalesce function can also be used to rename fields for clarity or convenience2.
The syntax for the coalesce function is:
coalesce(<field1>,<field2>,...)
The coalesce function will return the value of the first field that is not null in the argument list. If all fields are null, the coalesce function will return null.
For example, if you have a set of events where the IP address is extracted to either clientip or ipaddress, you can use the coalesce function to define a new field called ip, that takes the value of either clientip or ipaddress, depending on which is not null:
| eval ip=coalesce(clientip,ipaddress)
In your example, you have a set of events where the product name is extracted to either productName or productid, and you use the coalesce function to define a new field called productINFO, that takes the value of either productName or productid, depending on which is not null:
| eval productINFO=coalesce(productName,productid)
If both productName and productid fields have values for a given event, the coalesce function will return the value of the productName field because it appears first in the argument list. The productid field will be ignored by the coalesce function.
Therefore, the value for the productName field will be used to populate the productINFO field if both fields have values for a given event.
References:
Search Command> Coalesce
USAGE OF SPLUNK EVAL FUNCTION : COALESCE
問題 #202
Why would the following search produce multiple transactions instead of one?
答案:C
解題說明:
In Splunk, the transaction command is used to group events that share common characteristics into a single transaction1. By default, the transaction command groups all matching events into a single transaction1.
However, you can use the maxspan option to limit the time span of the transactions1. If the time span between the first and last event in a transaction exceeds the maxspan value, the transaction command will start a new transaction1.
Therefore, if the maxspan option is not included in the search, the transaction command might produce multiple transactions instead of one if the time span between the first and last event in a transaction exceeds the default maxspan value1.
Here is an example of how you can use the maxspan option in a search:
index=main sourcetype=access_combined | transaction someuniqefield maxspan=1h In this search, the transaction command groups events that share the same someuniqefield value into a single transaction, but only if the time span between the first and last event in the transaction does not exceed 1 hour1. If the time span exceeds 1 hour, the transaction command will start a new transaction1.
問題 #203
Which of the following statements would help a user choose between the transaction and stats commands?
答案:D
解題說明:
Reference: https://docs.splunk.com/Documentation/Splunk/8.0.3/SearchReference/Transaction One of the statements that would help a user choose between the transaction and stats commands is that there is a 1000 event limitation with the transaction command3.
The transaction command is used to group events that share a common value for one or more fields into transactions3. The transaction command has a default limit of 1000 events per transaction, which means that it will not group more than 1000 events into a single transaction3. This limit can be changed by using the maxevents parameter, but it can affect the performance and memory usage of Splunk3. Therefore, option C is correct, while options A, B and D are incorrect because they are not statements that would help a user choose between the transaction and stats commands.
問題 #204
Which of the following is included with the Common Information Model (CIM) add-on?
答案:C
解題說明:
The correct answer is B. Event category tags. This is because the CIM add-on contains a collection of
preconfigured data models that you can apply to your data at search time. Each data model in the CIM consists
of a set of field names and tags that define the least common denominator of a domain of interest. Event
category tags are used to classify events into high-level categories, such as authentication, network traffic, or
web activity. You can use these tags to filter and analyze events based on their category.You can learn more
about event category tags from the Splunk documentation12. The other options are incorrect because they are
not included with the CIM add-on. Search macros are reusable pieces of search syntax that you can invoke
from other searches. They are not specific to the CIM add-on, although some Splunk apps may provide their
own search macros. Workflow actions are custom links or scripts that you can run on specific fields or events.
They are also not specific to the CIM add-on, although some Splunk apps may provide their own workflow
actions. tsidx files are index files that store the terms and pointers to the raw data in Splunk buckets. They are
part of the Splunk indexing process and have nothing to do with the CIM add-on.
問題 #205
Which one of the following statements about the search command is true?
答案:D
問題 #206
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