SPLK-1004 Exam Dumps - Splunk Certification Questions and Answers

The correct search to generate a field with a value of"hello"is:

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| makeresults | eval field="hello"

Here’s why this works:

makeresults: This command creates a single event with no fields.

eval: Theevalcommand is used to create or modify fields. In this case, it creates a new field namedfieldand assigns it the value"hello".

Example:

| makeresults

| eval field="hello"

This will produce a result like:

_time field

------------------- -----

hello

The tstats command in Splunk is optimized for performance and has specific limitations regarding the use of wildcards.

According to Splunk Documentation:

"The tstats command does not support wildcard characters in field values in aggregate functions or BY clauses."

"You can use wildcards in the where clause to filter results."

This means that while wildcards are not permitted in the by or from clauses, they can be effectively used within the where clause to filter data based on pattern matching.

The list function of the stats command creates a multivalue entry, combining multiple occurrences of a field into a single multivalue field.

Thelistfunction of thestatscommand creates amultivalue entryby aggregating values from multiple events into a single field. This is particularly useful when you want to group data and collect all matching values into a list.

Here’s why this works:

Purpose of list: Thelistfunction collects all values of a specified field for each group and stores them as a multivalue field. For example, if you group byuser_id, thelistfunction will create a multivalue field containing all correspondingproductvalues for that user.

Multivalue Fields: Multivalue fields allow you to handle multiple values within a single field, which can be expanded or manipulated using commands likemvexpandorforeach.

Comprehensive and Detailed Step by Step Explanation:

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 of60 secondsfor 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 of10,000 resultsby 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.

Comprehensive and Detailed Step by Step Explanation:

Theuntablecommand in Splunk converts tabular data (rows and columns) into a format where each row represents a key-value pair. Its opposite is thechartcommand, which aggregates data into a tabular format with rows and columns.

Here’s whychartis the opposite ofuntable:

untable: This command takes structured data (e.g., a table with columnsA,B,C) and transforms it into a long format where each row contains a key-value pair (e.g.,field,value).

chart: This command aggregates data into a structured table format, grouping data by specified fields and calculating statistics (e.g., count, sum).

Example: Usinguntable:

spl

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| untable _time field value

This converts a table into key-value pairs.

Usingchart:

spl

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| chart count by field

This aggregates data into a structured table.

Other options explained:

Option B: Incorrect becausetablesimply selects specific fields for display but does not aggregate data likechart.

Option C: Incorrect becausebinis used for bucketing numeric or time-based data, not for creating tables.

Option D: Incorrect becausexyseriestransforms data into a series format but does not directly reverse the effect ofuntable.

The fill_summary_index.py script is a utility provided by Splunk to backfill data into a summary index. It's particularly useful when there are gaps in the summary index due to missed scheduled searches or when initializing a summary index with historical data.

According to Splunk Documentation:

"You can use the fill_summary_index.py script, which backfills gaps in summary index collection by running the saved searches that populate the summary index as they would have been executed at their regularly scheduled times for a given time range."

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:

spl

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| bin span=10ms bins=5 duration

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

Thetypeoffunction in Splunk is used to determine the data type of a field or value.It returns one of the following string results:

Number: Indicates that the value is numeric.

String: Indicates that the value is a text string.

Bool: Indicates that the value is a Boolean (true/false).

Here’s why this works:

Purpose of typeof: Thetypeoffunction is commonly used in conjunction with theevalcommand to inspect the data type of fields or expressions. This is particularly useful when debugging or ensuring that fields are being processed as expected.

Return Values: The function categorizes values into one of the three primary data types supported by Splunk:Number,String, orBool.

Example:

| makeresults

| eval example_field = "123"

| eval type = typeof(example_field)

This will produce:

_time example_field type

------------------- -------------- ------

123 String

Other options explained:

Option A: Incorrect becauseTrue,False, andUnknownare not valid return values of thetypeoffunction. These might be confused with Boolean logic but are not related to data type identification.

Option C: Incorrect becauseNullis not a valid return value oftypeof. Instead,Nullrepresents the absence of a value, not a data type.

Option D: Incorrect becauseField,Value, andLookupare unrelated to thetypeoffunction. These terms describe components of Splunk searches, not data types.

In a Splunk search containing a subsearch, the inner subsearch executes first. The result of the subsearch is then passed to the outer search, which often depends on the results of the inner subsearch to complete its execution.

In Splunk, the is_exact field indicates whether the count of distinct values for a particular field is exact or estimated. A value of:

1 means the count is exact.

0 means the count is an approximation.

Therefore, when is_exact is 0, it signifies that the distinct count of values for that field is an estimate, not an exact count.