SERVICENOW-CIS-DISCOVERY Practice Test 21 — 15 Questions

Question 1

A discovery administrator has created a new Discovery Schedule for a data center subnet and wants the MID Server to begin scanning immediately without waiting for the next scheduled interval. Which action should the administrator take on the Discovery Schedule record?

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

Accepted Answer

Click the 'Discover Now' related link on the Discovery Schedule record.. The Discover Now related link on a Discovery Schedule record is the supported mechanism for launching a discovery run immediately. It uses the schedule's existing IP ranges, MID Server selection, and behavior settings, so no other configuration changes are needed. This directly meets the requirement to scan the new subnet without waiting for the next scheduled interval.

Answer

Set the schedule's 'Active' field to false and then back to true.

Answer

Restart the MID Server service assigned to the schedule.

Answer

Change the schedule's 'Run' field to 'Once' and save the record.

Question 2

A MID Server named MID-LON-01 must be dedicated exclusively to Discovery for the London data center, and it must not receive any other type of MID Server job. Where do you configure this restriction?

Accepted Answer

On the MID Server record, set the Capabilities field to Discovery only.. Capabilities on the MID Server record act as the contract for what work the instance may send to that MID Server. To dedicate MID-LON-01 to Discovery, the Capabilities field must list only Discovery, which excludes all other job types. Clusters, validation state, and MID Server user permissions influence routing and access, but none of them restrict the MID Server to a single job category.

Answer

On the MID Server record, set the Validated field to true and add the MID Server to a dedicated MID Server cluster.

Answer

Create a MID Server user with the discovery_admin role and configure MID-LON-01 to use only that user.

Answer

Create a system property glide.discovery.mid_server and set its value to MID-LON-01.

Question 3

A MID Server is configured to use a specific user account for SSH discovery of Linux servers. The discovery runs successfully for most servers, but fails for a few servers with the error 'Authentication failed'. The MID Server logs show that the SSH connection is established but the credentials are rejected. What is the most likely cause?

Accepted Answer

The credentials stored in the ServiceNow credential record are incorrect for those servers.. When SSH discovery establishes a connection but fails with 'Authentication failed', the issue is with the credentials themselves. The MID Server successfully reached the target and initiated the SSH handshake, but the username/password or key was rejected. This often happens when credentials are shared across many servers but a few have different local accounts or passwords. Verifying and updating the credential record for those specific servers resolves the issue.

Answer

The MID Server's IP address is not whitelisted on the target servers.

Answer

The MID Server's SSH key is not authorized on the target servers.

Answer

The target servers have a different SSH port configured.

Question 4

You are designing a pattern to discover virtualization hosts and their guest virtual machines. You need the pattern to correctly associate each guest VM with its parent host so the CMDB reflects the containment relationship. Which TWO pattern design practices support building this relationship correctly? (Choose two.)

Accepted Answer

Use a 'Set Relation' step in the guest section to define the parent-child link between the guest CI and the host CI using the captured host identifier.. Building host-guest containment requires capturing the host's identifier in a variable and then using a Set Relation step in the guest section to link each guest to that parent. Inference from serial numbers, static parent values, or reversing execution order cannot produce correct dynamic relationships, so those approaches fail in a multi-host environment.

Answer

Create a separate pattern for guest VMs that runs independently and sets the parent host as a static value in each guest record.

Answer

Configure the guest steps to run before the host steps so the guest CI exists first and the host can adopt it afterward.

Answer

Rely on the identification engine to infer the host-guest relationship automatically from matching serial numbers on both CIs.

Question 5

A CMDB administrator is configuring CI identification for a new class of network devices. The administrator wants to ensure that duplicate CIs are minimized. Which two actions should the administrator take? (Choose two.)

Accepted Answer

Regularly review and reconcile CIs using the CMDB Health Dashboard to identify and merge duplicates.. To minimize duplicate CIs, administrators should define identification rules using a combination of unique and consistently populated attributes, such as Serial Number and MAC Address. Additionally, regularly using the CMDB Health Dashboard to identify and merge duplicates ensures ongoing data integrity. These two actions work together: robust identification rules prevent many duplicates from being created, while reconciliation catches any that slip through. Relying on a single attribute like Name is risky, and disabling rules or avoiding updates would worsen the problem.

Answer

Enable the 'CI Identification' property to automatically create new CIs when no match is found, rather than updating existing ones.

Answer

Set the identification rule to use only the 'Name' attribute, as it is always unique and reliable.

Answer

Disable all identification rules and rely on manual creation of CIs to ensure accuracy.

Question 6

An administrator must install a MID Server on a Linux host in a data center with no direct internet access. The host can reach the instance only through an HTTP proxy. Which TWO configuration elements must be set for the MID Server to communicate through the proxy? (Choose two.)

Accepted Answer

Proxy host and port in the MID Server's config.xml.. In a proxy-only network, the MID Server must be told where the proxy is and, if required, how to authenticate to it. These values belong in the MID Server's own configuration because the MID Server is the component making outbound connections. Cluster membership, instance-side properties, and inbound firewall rules do not provide the proxy address or credentials and therefore cannot enable this communication path.

Answer

An inbound firewall rule allowing the proxy to connect to the MID Server.

Answer

A system property on the instance that lists the proxy address.

Answer

A MID Server cluster with at least two members.

Question 7

A discovery administrator is reviewing the Discovery Logs to troubleshoot why a Windows server was not properly discovered. The administrator notices that the Shazzam phase completed successfully, but the Classification phase did not identify the device. Which two actions should the administrator take to resolve the issue? (Choose two.)

Accepted Answer

Verify that the Windows classification criteria are correctly configured and ordered.. When Shazzam succeeds but classification fails, the issue is typically with classification criteria or pattern configuration. Verifying that Windows classification criteria are correct and ordered properly, and ensuring the Windows patterns are active and triggered by Shazzam results, are the key steps. Other actions do not address the root cause of classification failure.

Answer

Restart the MID Server to refresh the discovery process.

Answer

Increase the MID Server's thread pool size to handle more concurrent discoveries.

Answer

Modify the Discovery Schedule to include the server's IP address explicitly.

Question 8

After installing the MID Server files on a Linux host and configuring config.xml, an administrator starts the MID Server service. The MID Server record in the instance shows a status of Up but Validated is false. What does this indicate?

Accepted Answer

The MID Server has started and is communicating, but the validation step has not been completed.. An Up status means the MID Server process is running and successfully checking in with the instance, so connectivity and authentication are functioning. Validated false simply means the administrator has not yet run the validation step that confirms the configuration is correct. The two fields are independent, and a newly started MID Server commonly shows Up with Validated false until that action is performed.

Answer

The MID Server user account lacks the mid_server role.

Answer

The MID Server cannot reach the instance and is using a cached configuration.

Answer

The MID Server is installed on an unsupported operating system.

Question 9

A CMDB administrator is troubleshooting why a Linux server CI keeps losing its correct 'CPU count' value after each nightly discovery run. The discovery source correctly reports 8 CPUs, but the stored value reverts to 2. Which configuration should be inspected first to explain the reversion?

Accepted Answer

The reconciliation precedence list for the CPU count attribute on the Linux Server class. When Discovery reports the correct value but the stored CI reverts, the most likely cause is a competing data source with higher precedence for that attribute. Reviewing the reconciliation precedence list for CPU count on the Linux Server class identifies the source that is winning and allows the administrator to correct the ordering.

Answer

The Discovery schedule's MID Server selection criteria

Answer

The MID Server's probe timeout setting for the Linux command probes

Answer

The pattern's CI Identification section for the Linux Server class

Question 10

You have installed a new MID Server and want to ensure it can connect to the ServiceNow instance. After starting the MID Server service, you check the MID Server record and see the status is 'Down'. Which log file on the MID Server should you check first to troubleshoot the connection issue?

Accepted Answer

agent0.log.0. The 'agent0.log.0' file is the main log for the MID Server and records all significant events, including connection attempts and errors. When the MID Server status is 'Down', this log will contain the specific error, such as authentication failure or network timeout, guiding your troubleshooting efforts.

Answer

error.log

Answer

wrapper.log

Answer

mid.log

Question 11

An administrator needs to review which CIs were recently modified by an integration and confirm the source of each change. Which CMDB capability provides a chronological record of attribute-level changes on a CI, including the data source that made the change?

Accepted Answer

CMDB Audit History on the CI record. CMDB Audit History is the built-in mechanism that records attribute-level changes on CI records, including the actor and timestamp. It is the correct place to verify which integration or user changed a value. The other capabilities shown are administrative, scoring, or scheduling views that do not expose per-attribute change history.

Answer

Discovery Schedule history

Answer

CI Class Manager

Answer

CMDB Health Dashboard

Question 12

A pattern designer is creating a pattern to discover a Linux server. The pattern needs to extract the operating system version from the output of the 'uname -a' command. The output format varies slightly across distributions. Which parsing strategy should be used to reliably extract the version?

Accepted Answer

Regular expression. Regular expressions are the most reliable way to extract data from command output that may have variable formatting. They allow pattern matching around the target data, ignoring surrounding inconsistencies. XML and JSON parsing require structured data, and delimiter-based parsing assumes consistent field positions, which is not the case here.

Answer

XML parsing

Answer

JSON parsing

Answer

Delimiter-based parsing

Question 13

A discovery administrator is configuring a new Discovery Schedule for a subnet that contains both Linux and Windows servers. The administrator wants to minimize the load on the MID Server and ensure that only necessary probes are run. Which configuration should the administrator use?

Accepted Answer

Use a Discovery Behavior that includes only the probes necessary for Linux and Windows, and rely on classification to trigger them.. To minimize MID Server load while ensuring necessary probes run, the administrator should configure a Discovery Behavior that includes only the probes for Linux and Windows. Classification will then trigger the appropriate probes based on the detected OS. This avoids running unnecessary probes and reduces overall load, unlike enabling all probes or creating separate schedules.

Answer

Create two separate Discovery Schedules, one for Linux and one for Windows, and assign them to different MID Servers.

Answer

Disable the Shazzam phase to reduce port scanning overhead.

Answer

Enable all available probes in the Discovery Behavior to ensure comprehensive data collection.

Question 14

Your organization uses a MID Server cluster to distribute discovery tasks. You need to ensure that a specific MID Server in the cluster is used exclusively for discovering a sensitive network segment, while other MID Servers handle general discovery. Which MID Server capability should you assign to the dedicated MID Server to achieve this?

Accepted Answer

Create a custom capability and assign it to the dedicated MID Server and to the discovery schedule for the sensitive segment.. Custom capabilities are used to route specific discovery tasks to specific MID Servers. By creating a custom capability and assigning it to both the dedicated MID Server and the discovery schedule, you ensure that only that MID Server processes the schedule. This provides granular control and is the recommended practice for isolating sensitive network segments.

Answer

Assign the 'Discovery' capability to the dedicated MID Server and remove it from all other MID Servers.

Answer

Set the 'mid.network.ip_ranges' property on the dedicated MID Server to only the sensitive segment's IP range.

Answer

Configure the dedicated MID Server as the only member of a new MID Server cluster and associate the discovery schedule with that cluster.

Question 15

You are a ServiceNow Discovery administrator for a large enterprise. You have configured Discovery to populate the CMDB with data from multiple sources, including ServiceNow Discovery, SCCM, and a third-party asset management system. You need to ensure that the CMDB is not polluted with duplicate CIs and that the most authoritative data source wins when there are conflicts. Which feature should you use to achieve this?

Accepted Answer

CMDB Identification and Reconciliation Engine (IRE). The CMDB Identification and Reconciliation Engine (IRE) is the correct feature because it provides the framework for identifying unique CIs and reconciling data from multiple sources. It allows you to define identification rules that specify which attributes to use for matching, and reconciliation rules that determine which source is authoritative for each attribute. This ensures data integrity and prevents duplicates. Other options do not provide these capabilities.

Answer

Service Mapping

Answer

Discovery Schedules

Answer

CMDB Health Dashboard