SERVICENOW-CIS-DISCOVERY Discovery Pattern Design — 40 Questions

Question 1

When debugging a pattern that fails to parse a JSON response, which tool in the Pattern Designer provides the most granular view of the variable state after a 'Parse JSON' step?

Accepted Answer

The 'Variables' tab in the Debugger. The 'Debug' panel in the Pattern Designer allows you to inspect variable values step-by-step after execution.

Answer

Pattern Log

Answer

The CMDB CI Class Manager

Answer

The Discovery Status record

Question 2

You are creating a new Discovery pattern and need to extract data from a command output where lines are separated by a consistent delimiter. Which parsing strategy should you use to map these specific values to table attributes?

Accepted Answer

Delimited parsing. The Delimited parsing strategy is specifically designed for structured text outputs where fields are separated by characters like commas, tabs, or pipes.

Answer

JSON parsing

Answer

XML parsing

Answer

Regex parsing

Question 3

You need to add a new CI type to an existing horizontal pattern. Which step must be performed in the Pattern Designer to ensure the CI is linked to the parent process?

Accepted Answer

Use the 'Related CI' step within the Identification section.. To link a CI to a parent process in a pattern, you must define the relation in the Identification section using the 'Related CI' step.

Answer

Add a new CI entry in the 'Identification Rules' table.

Answer

Modify the 'Discovery CI Identification' business rule.

Answer

Create a new pattern definition record in the CMDB.

Question 4

Which THREE of the following are valid ways to identify a CI in a pattern?

Accepted Answer

Using CI Identification Rules. Identification sections use identification rules, connection sections, and attribute matching to uniquely identify CIs.

Answer

Using a manual tag

Answer

Hard-coding the sys_id

Question 5

In the Pattern Designer, you need to set a CI attribute only if a specific command output returns a value. Which operation type should be used to define this conditional logic?

Accepted Answer

Set Parameter Value. The 'Set Parameter Value' operation in conjunction with 'Condition' blocks allows for conditional assignment based on previous step results.

Answer

Identification

Answer

Parse

Answer

Table Operation

Question 6

When debugging a pattern that fails during the identification phase, which TWO areas should you inspect in the Pattern Designer?

Accepted Answer

Identification section. The identification section is critical; checking the identification rule matches and the actual gathered data is the standard troubleshooting approach.

Answer

Credentials

Answer

Schedule

Answer

Discovery log

Question 7

During pattern debugging, you notice that a specific step is failing to run on a MID Server. You want to see the exact input and output of that step. Where should you look?

Accepted Answer

Pattern Designer Debugger. The Debugging mode in Pattern Designer provides an 'Input/Output' tab that captures the raw data for every step executed.

Answer

Discovery Log

Answer

ECC Queue

Answer

MID Server Agent Log

Question 8

You are modifying a pattern and need to extract a specific attribute from a JSON response returned by an API. Which step type is most appropriate for this task?

Accepted Answer

Parse JSON. The Parse JSON step type is specifically designed to parse structured JSON data and map values to variables.

Answer

Parse Variable

Answer

Set Parameter

Answer

Regex Extract

Question 9

In the Pattern Designer, what is the primary purpose of the 'Connection' section?

Accepted Answer

To establish relationships between the current CI and other CIs.. The connection section establishes the links and relationships between discovered CIs.

Answer

To parse command output.

Answer

To define the attributes of the CI.

Answer

To validate credentials.

Question 10

You are creating a pattern to capture a version number from a command line output. The output is 'Version: 1.2.3.4'. Which parsing strategy is most efficient for this specific string?

Accepted Answer

Regex parsing. Regex is the standard tool for extracting specific patterns from a single line of text.

Answer

Name-Value pair parsing

Answer

Delimiter parsing

Answer

XML parsing

Question 11

Which action allows you to test a pattern against a specific Discovery status record without running a full Discovery scan?

Accepted Answer

Pattern Designer Test mode. The 'Test' feature in the Pattern Designer allows you to simulate execution against a specific Discovery node.

Answer

Modify Discovery Schedule

Answer

Submit a change request

Answer

Re-run Discovery

Question 12

In a horizontal pattern, you have an Identification section that fails to match a CI. What is the most likely cause if the 'Identification' step has correct attributes?

Accepted Answer

The Identification rule does not support the CI class.. If attributes are correct, the 'Identification Rule' or 'CI Type' settings are usually the culprit for mismatches.

Answer

The pattern contains syntax errors.

Answer

The Discovery credentials are invalid.

Answer

The pattern is not published.

Answer

The MID Server is down.

Question 13

When designing a pattern to identify a custom application, which section is responsible for populating the CI attributes?

Accepted Answer

Identification section. The Identification section is specifically designed for matching and attribute population.

Answer

Pre-pattern execution

Answer

Extension section

Answer

Connection section

Question 14

When configuring a 'Set Parameter' step, where is the value retrieved from if you select 'Variable'?

Accepted Answer

From a memory variable created earlier in the pattern.. A 'Variable' parameter type retrieves its value from a previously defined variable in the pattern session.

Answer

From the MID server configuration.

Answer

From the CMDB table.

Answer

From a system property.

Question 15

When dealing with a nested XML response from an API, which parsing method should be used to drill down into a specific child node?

Accepted Answer

Parse XML with XPath. The 'Parse XML' step supports XPath, which is ideal for traversing nested XML structures.

Answer

Parse Delimited Text

Answer

Parse JSON

Answer

Parse Name-Value pair

Question 16

What happens if a pattern execution encounters an error in a step that is marked as 'Continue on error'?

Accepted Answer

The pattern proceeds to the next step in the sequence.. The 'Continue on error' flag allows the discovery to proceed to the next step despite failure.

Answer

The error is logged, and the pattern restarts.

Answer

The entire pattern execution stops.

Answer

The pattern skips to the next section.

Question 17

Which of the following is the correct order of operations in a horizontal pattern?

Accepted Answer

Identification, Connection, Extension. The standard flow is Identification, then Connection, then Extension sections.

Answer

Connection, Identification, Extension

Answer

Identification, Extension, Connection

Answer

Extension, Identification, Connection

Question 18

What is the benefit of using an Extension section in a pattern?

Accepted Answer

To allow for modularity and reuse of logic.. Extension sections promote code reusability across multiple patterns.

Answer

To bypass the need for identification.

Answer

To increase the execution speed.

Answer

To automatically update CMDB schemas.

Question 19

When should you use the 'Lookup' step in a pattern?

Accepted Answer

To retrieve data from an existing CMDB record.. The 'Lookup' step is used to find existing records in the CMDB that aren't the primary CI of the pattern.

Answer

To create a new CI.

Answer

To delete a CI.

Answer

To identify the primary CI.

Question 20

Which UI tool is used to visualize the pattern execution flow?

Accepted Answer

Pattern Designer. The Pattern Designer includes a graphical interface that displays the steps and flow of the pattern.

Answer

Discovery Dashboard

Answer

Service Mapping view

Answer

CI Class Manager