SERVICENOW-CIS-DISCOVERY Practice Test 20 — 15 Questions

Question 1

A discovery pattern must ensure that a CI is only created (not updated) when the identification process cannot find an existing record. The pattern currently has an Identification step that runs successfully. You need to configure the next step to execute only if the CI was not found. Which condition should you use in the step's 'Run if' condition?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

Set the condition to '${ci.sys_id}' is empty. The Identification step populates the pattern's CI context with the sys_id of a matched CI. If no match is found, that sys_id remains empty. Therefore, to run a step only when no CI exists, the condition must check that the sys_id is empty. This prevents duplicate CI creation and ensures the pattern follows the intended create-only logic.

Answer

Set the condition to '${ci.sys_id}' != null

Answer

Set the condition to '${identification.status}' == 'found'

Answer

Set the condition to '${ci.sys_id}' is not empty

Question 2

An implementation specialist is reviewing the discovery logs and notices that a network device is being classified as a 'Printer' instead of a 'Router'. The device responds to SNMP but the classification is incorrect. Which Discovery configuration element should be adjusted to correct the classification?

Accepted Answer

The Discovery Classification record for 'Router'. Discovery Classification records define the rules that map a device to a specific class based on attributes like SNMP OIDs, open ports, or system descriptions. When a device is misclassified, the criteria for the intended class (Router) or the competing class (Printer) need adjustment. Modifying the Router classification to include more specific SNMP OIDs ensures the device matches correctly.

Answer

The Discovery Behavior for the network device

Answer

The SNMP credentials used by the MID Server

Answer

The MID Server's IP address range configuration

Question 3

During a Discovery run, a Windows server is discovered and its hostname matches an existing CI in the CMDB, but the serial number differs. The CI Class Manager shows that the class uses a CI Identification rule with 'Hostname' as the only identifier. What is the most likely outcome for this CI?

Accepted Answer

The existing CI will be updated with the new serial number, and no new CI will be created.. The CI Identification rule defines which attributes are used to match discovered data to existing CIs. When Hostname is the only identifier, a match on hostname is sufficient to identify the CI, regardless of other attribute differences. Discovery then updates the CI's attributes, including serial number, to reflect the discovered state. This prevents duplicate CIs and maintains CMDB accuracy.

Answer

A new CI will be created because the serial number does not match, and the existing CI will be marked as duplicate.

Answer

A new CI will be created because the existing CI's serial number does not match, and the old CI will be retired.

Answer

The Discovery run will fail because the serial number mismatch violates the identification rule.

Question 4

A pattern includes a step that runs a command to retrieve a list of installed software. The command output is large and needs to be processed to create multiple CI records. Which pattern step type should be used to iterate over each line of output and create a CI for each?

Accepted Answer

For each step. The for each step is specifically designed to iterate over a collection of items and execute a set of steps for each one. This allows the pattern to process each line of software output and create a CI for each entry. Other step types do not provide iteration capabilities.

Answer

Parallel step

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Conditional step

Answer

Parse step

Question 5

You are creating a new Discovery pattern for a custom application. You need to define the pattern's entry point and specify which CI type it will discover. Where in the Pattern Designer do you configure the CI type that the pattern will create or update?

Accepted Answer

Pattern properties. The CI type that a pattern discovers is defined in the pattern properties. This setting is crucial because it determines the CMDB class for the CI records created or updated by the pattern. Other areas like step conditions, Parse Variable settings, and Create CI steps do not define the overall CI type.

Answer

Step conditions

Answer

Create CI step

Answer

Parse Variable settings

Question 6

A CMDB administrator notices that a Linux server CI has multiple IP addresses, but only one is being discovered and stored in the 'ip_address' field. The Discovery pattern uses the 'nmap' command to scan the server. What is the most likely reason for this behavior?

Accepted Answer

The 'ip_address' field is a single-value field and can only store one IP address; additional IPs are stored in related network adapter CIs.. The 'ip_address' field on a server CI is designed to hold a single primary IP address. To capture multiple IPs, Discovery creates or updates Network Adapter CIs, each representing a network interface with its own IP address. These adapters are related to the server CI via relationships. This approach maintains a normalized data model and allows for detailed network configuration tracking. The pattern's logic determines which IP is considered primary and stored on the server CI, while others are stored on adapters.

Answer

The CMDB does not support storing multiple IP addresses for a single CI, so only one can be recorded.

Answer

The server's firewall is blocking the discovery of secondary IP addresses, so only the primary IP is reachable.

Answer

The 'nmap' command only returns the first IP address it finds, so Discovery cannot capture additional IPs.

Question 7

You are a ServiceNow Discovery administrator. After a recent discovery run, you notice that a Linux server CI has an incorrect operating system version attribute. You want to manually correct this value in the CMDB. Which module should you use to edit the CI record?

Accepted Answer

Configuration > CIs. To manually edit a CI record in the CMDB, you use the Configuration > CIs module. This module lists all CIs and allows you to open and modify their attributes. The other options are not designed for editing individual CI records; they serve different purposes such as managing classes, scheduling discovery, or monitoring CMDB health.

Answer

Discovery > Discovery Schedules

Answer

Configuration > CI Class Manager

Answer

Configuration > CMDB Health Dashboard

Question 8

You are designing a Discovery pattern that runs a command on a Linux host and then parses the output to populate the 'CPU core count' field on the CI. The command's output contains multiple lines, and the relevant number appears on the same line as the label 'CPU(s):'. Which Pattern Designer step configuration should you use to reliably extract the numeric value?

Accepted Answer

Use a 'Parse Variable' step with a regular expression that captures the digits after 'CPU(s):'.. When a value is embedded in a labeled line, a regex-based Parse Variable step is the reliable extraction method because it isolates the capture group independent of line position or surrounding whitespace. Static assignment, table parsing, and whole-line iteration each fail to produce a clean numeric value for the CI attribute in this scenario.

Answer

Use a 'Get Next' step to iterate through lines until one contains 'CPU(s):' and then write that entire line to the CI.

Answer

Use a 'Parse Table' step configured with the column header 'CPU(s):' and a single row.

Answer

Use a 'Set Parameter' step with a static value of 'CPU(s):' and reference the line index.

Question 9

A MID Server is deployed in a DMZ and must communicate with the ServiceNow instance over HTTPS. The security team requires that all outbound traffic from the MID Server be encrypted and authenticated. Which MID Server configuration ensures that the MID Server validates the ServiceNow instance's SSL certificate?

Accepted Answer

Import the ServiceNow instance's SSL certificate into the MID Server's Java truststore.. To validate the ServiceNow instance's SSL certificate, the MID Server must have the instance's certificate (or its issuing CA) in its Java truststore. This ensures that the MID Server only communicates with a trusted instance. Importing the certificate is a standard security practice, especially when using self-signed certificates or internal CAs.

Answer

Set the MID Server property 'mid.ssl.trust_all_certs' to true.

Answer

Set the MID Server property 'mid.ssl.certificate.validate' to true.

Answer

Configure the MID Server to use HTTP instead of HTTPS by setting 'mid.service.use_https' to false.

Question 10

A CMDB administrator is investigating why a discovered printer CI is not showing any relationships to the network switch it is connected to, even though the switch was discovered. The Discovery pattern for printers includes steps to collect ARP tables and MAC addresses. What is the most likely reason for the missing relationship?

Accepted Answer

The relationship is created only if the switch's MAC address table is successfully collected and processed to map the printer's MAC to the switch port.. Network relationships between endpoints like printers and switches are typically derived from the switch's MAC address table, which maps MAC addresses to switch ports. Discovery patterns for switches collect this table, and then a process correlates the MAC addresses of discovered devices to create relationships. If the switch's MAC table is not collected or is incomplete, the relationship to the printer will be missing. Other data sources like ARP tables can help but are less reliable for port-level mapping.

Answer

The relationship between the printer and switch is not defined in the CMDB relationship rules, so it cannot be created.

Answer

The printer's ARP table does not contain the switch's MAC address, so the relationship cannot be inferred.

Answer

The switch's Discovery pattern does not include the necessary steps to create relationships to printers.

Question 11

You are building a pattern for a network device that exposes data only through an SSH session requiring a non-standard prompt and a two-step authentication exchange. Your pattern must run several commands after login and parse each result. Which approach correctly addresses the interactive login and command execution within the pattern?

Accepted Answer

Configure the pattern's connection section with the SSH credentials, set the prompt pattern to match the device's custom prompt, and add command steps that execute after the session is established.. Interactive SSH devices with custom prompts are handled by configuring the pattern's connection with credentials and a prompt match, then issuing command steps inside that session. Separate patterns, concatenated commands, or unrelated protocols like WMI and SNMP cannot establish or maintain the required interactive SSH session for sequential command execution and parsing.

Answer

Set the connection type to 'WMI' and provide the device's SNMP community string so the MID Server can retrieve the data without an interactive login.

Answer

Use a single 'Run Command' step with all commands concatenated by semicolons and parse the combined output with one regex.

Answer

Create separate patterns for each command and rely on the MID Server's automatic session reuse to keep the SSH connection alive across pattern runs.

Question 12

A pattern designer wants to reuse a set of steps that are common across multiple patterns, such as steps to gather basic system information. What should the designer do to avoid duplicating these steps in each pattern?

Accepted Answer

Create a new pattern that contains the common steps and then reference it from other patterns using a 'Pattern' step.. The 'Pattern' step in ServiceNow Discovery allows one pattern to invoke another, enabling modular design. By extracting common steps into a reusable pattern, you avoid duplication and simplify updates. This is the standard method for sharing pattern logic across multiple discovery patterns.

Answer

Define the common steps as a 'Subflow' in Flow Designer and call it from the pattern.

Answer

Copy and paste the steps into each pattern and maintain them separately.

Answer

Use the 'Include' directive in the pattern XML to import steps from a library.

Question 13

You are a ServiceNow Discovery administrator. A discovery pattern for a network device is failing to populate the 'Firmware Version' attribute. You have confirmed that the SNMP OID for firmware version is correctly queried and returns a value. However, the attribute remains empty in the CMDB. What is the most likely reason for this issue?

Accepted Answer

The discovery pattern does not have the correct step to map the SNMP OID to the 'Firmware Version' attribute.. The most likely reason is that the discovery pattern does not have the correct step to map the SNMP OID to the 'Firmware Version' attribute. Even if the OID is queried, without a mapping step, the value is not written to the CI. The other options are less likely: identification rules do not affect attribute population, the attribute likely exists, and the pattern is running if other data is collected.

Answer

The discovery schedule is not configured to run the pattern for this device.

Answer

The attribute is not included in the CI class's identification rule.

Answer

The CI class does not have a 'Firmware Version' attribute defined.

Question 14

A pattern designer is testing a new pattern for a network switch. The pattern includes a step that runs a command and parses the output. During testing, the designer notices that a specific attribute is not being populated even though the command output contains the expected value. The parsing step uses a regular expression. What is the most likely cause?

Accepted Answer

The regular expression does not match the output due to case sensitivity or whitespace differences.. When a regular expression fails to match, the attribute remains unpopulated. Common reasons include case sensitivity, unexpected whitespace, or slight format variations. The other options would typically cause more obvious failures, such as command failure or pattern validation errors, rather than silent non-population.

Answer

The MID Server does not have the necessary credentials to run the command.

Answer

The attribute is not defined in the CI class.

Answer

The step is marked as 'Continue on error' and is silently failing.

Question 15

While validating a newly built pattern in the Pattern Designer, you need to confirm that a step extracting the 'hostname' attribute from a device's command output is capturing the correct value before you commit changes to production. Which action best validates the extraction without deploying the pattern to a full discovery schedule?

Accepted Answer

Use the Pattern Designer's test/debug run against a target device to step through execution and inspect the variable values captured by each step.. The Pattern Designer's test/debug run executes the pattern against a chosen device and reveals each step's captured variables, allowing direct confirmation of the hostname extraction before publishing. Scheduled discovery, log review, and production monitoring are slower, less isolated, and risk affecting live data, so they are inferior validation methods.

Answer

Enable verbose logging on the MID Server and search the agent logs for the parsed hostname string after the next discovery cycle.

Answer

Publish the pattern to production and monitor the CMDB for records whose hostname field is populated correctly.

Answer

Create a discovery schedule scoped to the single device and wait for the next scheduled run to review the resulting CI record.