XSIAM-Analyst Data Analysis With XQL — 20 Questions

Question 1

An analyst wants to parse a custom log string field containing key-value pairs separated by spaces into distinct XQL fields. Which command should be used?

Accepted Answer

parse raw_log 'KEY-VALUE' as extracted_field. The 'parse' command with regular expressions or predefined grok/kv patterns is used to extract fields from raw string data.

Answer

parse raw_log into $key = $val

Answer

parse raw_log "" as @timestamp, action

Answer

parse raw_log "*=*" as key, value

Question 2

An analyst wants to count the number of unique IP addresses communicating with external networks in an XQL query. Which command combination accomplishes this efficiently?

Accepted Answer

dataset = network_raw | stats count(distinct external_ip) as unique_ips. The 'dedup' or 'count by' with 'fields' or 'stats count(distinct)' is used. Using stats count(unique) is incorrect; stats count(distinct field) is the correct XQL syntax.

Answer

dataset = network_raw | stats count(unique external_ip)

Answer

dataset = network_raw | summarize unique_ips = count(external_ip)

Answer

dataset = network_raw | unique external_ip | count

Question 3

An analyst needs to sort query results by timestamp in descending order and limit the output to the top 10 records. Which syntax is correct?

Accepted Answer

dataset = xdr_data | sort - _time | limit 10. Sorting in XQL uses the 'sort' command with a field and order modifier (e.g., -field for descending), followed by 'limit'.

Answer

dataset = xdr_data | sort _time desc | head 10

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dataset = xdr_data | reverse _time | limit 10

Answer

dataset = xdr_data | order by _time desc | top 10

Question 4

When writing an XQL query involving time manipulation, how can an analyst filter events that occurred within the last 15 minutes dynamically?

Accepted Answer

filter _time >= ago(15m). XQL handles relative time filtering using the time range picker or the 'preset' or standard time modifiers, but within the query body, filtering can compare _time against current time or use pre-filter scopes. XSIAM queries typically scope time at the execution level or via `_time >= ago(15m)`.

Answer

filter timestamp > now() - 15 * 60

Answer

filter _time in last(15m)

Answer

filter timeframe = 'last_15_minutes'

Question 5

An analyst is grouping events by user and calculating the average CPU utilization. Which XQL aggregate function should be used inside the 'stats' command?

Accepted Answer

avg(). To calculate an average in XQL stats, the 'avg()' function is used.

Answer

average()

Answer

calc_avg()

Answer

mean()

Question 6

An analyst wants to write an XQL query that utilizes a lookup table called 'threat_ips' to tag events where the source IP matches a known malicious IP. Which command sequence is correct?

Accepted Answer

dataset = network_raw | lookup threat_ips local_ip as ip output threat_level. The 'lookup' command enriches records by matching fields against a lookup table defined in XSIAM.

Answer

dataset = network_raw | match threat_ips.ip = local_ip

Answer

dataset = network_raw | join table=threat_ips on local_ip

Answer

dataset = network_raw | enrich table=threat_ips match=local_ip

Question 7

An analyst writes an XQL query using the 'sliding window' or sequence correlation features to detect a failed login followed by a successful login within 5 minutes. Which command structure facilitates event sequencing in XQL?

Accepted Answer

dataset = xdr_data | sequence by actor_username [action = 'LOGIN_FAIL'] [action = 'LOGIN_SUCCESS'] maxspan=5m. XQL supports sequence analysis using the 'dedup', 'events', or correlation syntax, specifically utilizing sequence matching clauses.

Answer

dataset = xdr_data | chain first(action='LOGIN_FAIL') then(action='LOGIN_SUCCESS') window=5m

Answer

dataset = xdr_data | correlate order(LOGIN_FAIL, LOGIN_SUCCESS) span=5m

Answer

dataset = xdr_data | track actor_username steps(LOGIN_FAIL, LOGIN_SUCCESS)

Question 8

An analyst wants to output distinct values of a field while also showing a count of occurrences for each. Which XQL aggregation pattern is best suited for this?

Accepted Answer

dataset = xdr_data | stats count() by action_type. Grouping by a field and counting occurrences uses the 'stats count() by field' structure.

Answer

dataset = xdr_data | distinct action_type | count

Answer

dataset = xdr_data | summarize count = frequency(action_type)

Answer

dataset = xdr_data | group action_type | count_records

Question 9

Which XQL command allows an analyst to pivot or transform rows into columns, similar to a pivot table?

Accepted Answer

pivot. The 'xform' or 'pivot' command is used in data manipulation; specifically, 'pivot' reshapes rows into columns based on aggregate values.

Answer

transpose

Answer

matrix

Answer

reshape

Question 10

An analyst wants to calculate the time difference between two events (process creation and network connection) for the same process GUID. Which XQL function calculates the time delta?

Accepted Answer

alter time_diff = timestamp_diff(end_time, start_time). Subtracting timestamps or using duration calculation functions in event correlation is handled via timestamp arithmetic or delta functions.

Answer

alter time_diff = end_time - start_time

Answer

alter time_diff = elapsed(start_time, end_time)

Answer

alter time_diff = datetime_diff(end_time, start_time)

Question 11

Which THREE aggregate functions can be used with the 'stats' command in XQL to analyze numerical metrics? (Choose three)

Accepted Answer

count(). Valid stats aggregate functions include count, sum, and max.

Answer

highest()

Answer

total()

Question 12

When joining two datasets in XQL, which THREE join types are supported by the XQL join command? (Choose three)

Accepted Answer

inner. XQL supports inner, outer (or left outer), and right joins or similar relational join types in its syntax.

Answer

outer

Answer

recursive

Answer

cross

Question 13

An analyst wants to ensure that string comparisons in an XQL filter are case-insensitive. Which TWO methods or operators can achieve this? (Choose two)

Accepted Answer

Use regex matching operators with case-insensitive flags or appropriate syntax.. XQL supports case-insensitive operators (like ~= or specific modifiers) and string conversion functions like lower().

Answer

Use the case_insensitive=true parameter inside the filter command.

Answer

Use the exact match operator '===' which ignores case by default.

Answer

Append the suffix [ci] to the equals operator.

Answer

Convert fields to lowercase using lower() prior to comparison.

Question 14

An analyst wants to reshape query results to display statistical summaries. Which TWO commands are commonly used for data aggregation and shaping in XQL? (Choose two)

Accepted Answer

sort. Data aggregation uses the 'stats' command, and sorting uses the 'sort' command.

Answer

group_by

Answer

stats

Answer

aggregate

Answer

compile

Question 15

Which XQL command is used to rename a field in the output results dataset?

Accepted Answer

rename. The 'rename' command in XQL is used to change the display name of fields in the results table.

Answer

format

Answer

alter

Answer

fields

Question 16

When utilizing the 'compact' or 'dedup' commands in an XQL query, an analyst notices that certain fields are missing from the resulting dataset. Why does this behavior occur?

Accepted Answer

The dedup command drops all fields that are not part of the specified grouping key or explicitly retained.. By default, 'dedup' retains only the fields present in the groupby or distinct fields unless specified with specific retain parameters or prior projections.

Answer

XQL automatically normalizes all omitted fields to null values instead of dropping them.

Answer

The schema definition overrides field selection during sorting stages.

Answer

The query engine automatically truncates datasets larger than 1MB.

Question 17

Which XQL command restricts the fields included in the final output to only those explicitly specified?

Accepted Answer

fields. The 'fields' command is used to include or exclude specific fields from the output stream.

Answer

keep

Answer

select

Answer

project

Question 18

An analyst needs to query all endpoint events in XQL where the action type is explicitly equal to 'PROCESS_START'. Which XQL syntax correctly applies this filter?

Accepted Answer

dataset = xdr_data | filter event_type = "PROCESS_START". The correct XQL filter uses the dataset command followed by the filter criteria using standard comparison operators like '='.

Answer

dataset = endpoint_raw | filter action_evt = 'PROCESS_START'

Answer

dataset = xdr_data | where action_type IN ('PROCESS_START')

Answer

dataset = endpoint_raw | search action_type == 'PROCESS_START'

Question 19

An analyst writes an XQL query combining two different datasets using an inner join based on a matching hostname. Which syntax structure is correct?

Accepted Answer

dataset = xdr_data | join type=inner dataset = cloud_trail on actor_username = username. XQL supports the 'join' command with an optional type and an ON clause specifying the matching fields.

Answer

dataset = xdr_data, cloud_trail | correlate on actor_username

Answer

dataset = xdr_data | lookup dataset = cloud_trail on actor_username

Answer

dataset = xdr_data | merge dataset = cloud_trail where actor_username == username

Question 20

What is the primary purpose of the Cortex Data Model (CDM) in XSIAM?

Accepted Answer

To normalize disparate log sources into a standardized schema for consistent querying.. The Cortex Data Model normalizes disparate log sources into standardized schemas and fields for uniform querying.

Answer

To encrypt telemetry data before it leaves the endpoint agent.

Answer

To automatically remediate incidents without analyst intervention.

Answer

To compress log storage sizes on disk by removing redundant headers.