You are currently viewing 50 ServiceNow Discovery Interview Questions 2023

50 ServiceNow Discovery Interview Questions 2023

ServiceNow Discovery is a crucial component of the ServiceNow IT Operations Management (ITOM) suite, used for creating an accurate and up-to-date representation of your infrastructure. Below are 50 ServiceNow Discovery Interview Questions and answers that can help gauge your depth of understanding and expertise in ServiceNow Discovery.

What is ServiceNow Discovery?

ServiceNow Discovery automates the identification of infrastructure components within an IT environment and maps the relationships between them.

What are CI and CMDB in ServiceNow Discovery?

A CI (Configuration Item) represents an IT asset. CMDB (Configuration Management Database) is the database that stores all CIs and their relationships.

What is a Discovery Schedule?

The Discovery Schedule is a pre-configured time period to run the Discovery process.

How does Discovery find CIs?

Discovery uses several methods like Shazzam probes, SNMP, and SSH to find CIs.

Explain the process of Discovery in ServiceNow.

Discovery works in three main steps: Discovery Schedule, Data Collection, and Identification and Reconciliation

What are Shazzam Probes?

Shazzam probes are a part of a Discovery that identifies what kind of device it is inspecting.

What is a MID Server?

MID (Management, Instrumentation, and Discovery) Server is an application that acts as a middleware between the ServiceNow instance and external systems.

Can you discover cloud resources with ServiceNow Discovery?

Yes, ServiceNow Discovery can discover cloud resources such as AWS, Azure, etc.

What are the patterns in ServiceNow Discovery?

Patterns are used to define the logic for discovering specific types of CIs.

What is the role of the ECC Queue?

The ECC Queue is the communication layer between the MID Server and the ServiceNow instance.

What is SNMP?

The Simple Network Management Protocol (SNMP) is a standard for collecting and organizing information about managed devices.

What is the difference between a probe and a sensor?

Probes collect data, while sensors process the collected data and populate the CMDB.

What are the identification rules?

Identification rules are used to uniquely identify CIs during the discovery process.

How does Discovery handle duplicate CIs?

It uses Identification and Reconciliation to avoid duplication of CIs.

Explain how ServiceNow handles load balancing.

ServiceNow can discover load balancers and the relationships between them and the devices they are balancing.

What is TCP port scanning?

It’s a method used to discover open ports on a network device.

What are application fingerprints?

These are unique patterns that help identify specific applications running on servers.

What is a Trigger probe?

It’s a specialized probe designed to trigger other probes based on the data it gathers.

What are classifiers?

Classifiers help determine the type of CI being discovered.

What are some limitations of ServiceNow Discovery?

Limited SNMP version support, discovery can be resource-intensive, etc.

How do you customize Discovery patterns?

By using the ServiceNow Studio or directly via the Pattern Designer.

Can Discovery identify software installed on devices?

Yes, it can identify software through various methods like registry lookups, file scanning, etc.

How do you debug Discovery issues?

By using Discovery logs, debug logs, and sometimes direct queries to the ECC Queue

What are Discovery Behaviors?

Behaviors in ServiceNow Discovery define how certain types of CIs are discovered.

What is Service Mapping?

Service Mapping is an extension of Discovery that helps map services to IT infrastructure.

How does ServiceNow integrate with third-party discovery tools?

Through APIs and customized connectors.

What is the use of a Horizontal Pattern?

Horizontal patterns are used to discover a broad range of similar CIs.

What is Orchestration in relation to Discovery?

Orchestration can automate tasks based on the CIs discovered and their attributes.

What is ServiceNow ITOM and how is Discovery a part of it?

ITOM (IT Operations Management) is a suite of applications, including Discovery, aimed at automating IT operations tasks.

How would you go about discovering a new subnet added to your network?

By updating the IP range in the Discovery Schedule.

How would you deal with false positives in Discovery?

By fine-tuning Identification Rules and Patterns.

What would you do if Discovery was unable to identify certain CIs?

Check for connectivity issues, credentials, and logs to identify the issue.

How would you configure a MID Server for Discovery?

By installing the MID Server software, registering it with the ServiceNow instance, and configuring it for Discovery.

A Discovery job is taking too long. How would you troubleshoot?

Check the ECC queue and logs, and possibly divide the job into smaller parts.

How would you ensure that Discovery doesn’t impact network performance?

By scheduling it during off-hours and monitoring its resource usage.

Can you do a selective Discovery of certain CIs? How?

Yes, by specifying the CI types or IP ranges in the Discovery Schedule.

How do you automate the updating of CI relationships?

By using Discovery to map relationships automatically based on patterns.

What would you do if two MID Servers returned conflicting data?

I would check the MID Server logs, versions, and configurations to identify the discrepancies.

How do you update or modify a Discovery pattern?

By using the Pattern Designer in ServiceNow.

How do you stay updated on the latest features in ServiceNow Discovery?

By following release notes, blogs, webinars, and online courses.

Can you share an example of how you improved the Discovery process in your organization?

Discuss the problem you identified, the steps you took to address it, how you implemented the improvements, and what the results were. Be prepared to share specific metrics that demonstrated the improvement, if possible.

How does ServiceNow Discovery differentiate between a physical server and a virtual machine?

Discovery uses attributes like ‘host_type’ and identifiers from virtualization platforms like VMware to distinguish between physical servers and virtual machines.

Explain how normalization and reconciliation work in the context of ServiceNow Discovery.

Normalization standardizes data to a common format, while reconciliation resolves conflicts and duplicates, ensuring that the most accurate data is stored in the CMDB.

What are the security considerations to keep in mind when setting up ServiceNow Discovery?

Considerations include secure storage of credentials, encrypted data transmission, and setting up firewall rules to allow only authorized traffic.

How do you handle configuration drift in your infrastructure with ServiceNow Discovery?

Discovery can be scheduled to run frequently to detect configuration changes. Any drift can be flagged for manual review or automatically reconciled based on rules.

How would you optimize the performance of ServiceNow Discovery in a large, complex environment?

Strategies may include distributing MID Servers strategically, fine-tuning Discovery schedules, and using targeted discovery for specific CI types.

What’s your strategy for rolling back changes in the CMDB if a Discovery run introduces errors?

You can use baseline snapshots and data auditing features to identify and revert erroneous changes made during Discovery runs.

Discuss a multi-tenancy setup in ServiceNow Discovery. How would you configure Discovery for multiple business units with distinct configurations?

Multi-tenancy in Discovery can be managed by setting up separate Discovery schedules, MID Servers, and identification rules for each business unit.

How can you extend the capabilities of ServiceNow Discovery using APIs?

You can use REST APIs to pull data from unsupported devices into the ServiceNow CMDB, or to push Discovery data to external systems.

What’s the significance of “first discovered” and “last discovered” timestamps for CIs in ServiceNow?

hese timestamps can be useful for auditing, compliance, and for identifying stale or unused CIs.

What is Dependency Views, and how does it interact with ServiceNow Discovery?

Using CI data and relationships from the CMDB, which Discovery populates, Dependency Views is a visualization tool that produces dependency maps.

How would you integrate a custom, in-house application into the ServiceNow Discovery process?

You could create custom probes, sensors, and identification rules to discover this application, or use APIs to bring the data into the CMDB.

How would you troubleshoot a scenario where ServiceNow Discovery is failing to discover new CIs after a network upgrade?

I would start by checking the MID Server logs, verifying network configurations, and ensuring that Discovery schedules are set up to scan the new IP ranges.

Suppose ServiceNow Discovery identifies a device but categorizes it incorrectly. How would you correct this?

I would examine the identification rules and patterns that led to the incorrect classification and modify them to correctly identify the CI.

How would you handle discrepancies in CI data between ServiceNow and a third-party asset management tool?

I would reconcile the data manually or programmatically by mapping fields between the two systems and resolving conflicts based on a predefined set of rules.

Describe a time when you had to modify out-of-the-box Discovery patterns to meet specific organizational needs.

In a previous role, I had to modify existing patterns to include custom attributes relevant to our business needs. I used the Pattern Designer to make these changes.

How do you assess the ROI (Return on Investment) of a ServiceNow Discovery implementation?

ROI can be assessed by comparing the time and resources saved in IT operations against the cost of implementing and maintaining the Discovery solution.

What are the critical components to consider when planning a phased rollout of ServiceNow Discovery?;

Key components include selecting pilot departments, defining success metrics, and planning for a gradual scaling-up of the Discovery process.

How do you ensure high availability and disaster recovery for your ServiceNow Discovery setup?

High availability can be achieved through redundant MID Servers and backup strategies for the CMDB and Discovery configurations.

What considerations would you take into account when migrating from a different discovery solution to ServiceNow Discovery?

Considerations include data mapping, transitional phases, and thorough testing to ensure data integrity and functionality.

Discuss the importance of governance and compliance in managing and operating ServiceNow Discovery.

Governance ensures that Discovery aligns with organizational policies, while compliance ensures adherence to industry standards and regulations.

50 + ServiceNow Discovery Interview Questions

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