Important ServiceNow CIS-Discovery Exam Questions

Answer: C, D

Explanation:

Horizontal pattern types are used to discover the configuration items (CIs) that belong to a specific category or class, such as infrastructure or application. They define the operations that Discovery performs to identify and classify the CIs, and the attributes that Discovery populates for each CI.Horizontal patterns can be applied to any operating system or platform that supports the required protocols and commands12.

Horizontal discovery patterns

Discovery pattern types

Answer: A, B, D

Explanation:

The image shows a part of a horizontal pattern in Pattern Designer that uses the WMI Query operation to retrieve information about the processes running on a Windows server. The operation takes a WQL query as an input parameter and returns a tabular variable that contains the results of the query. The tabular variable is named 'WMI Query' by default, but it can be renamed by the user. The WQL query in the image selects four attributes from the Win32_Process class: Name, MaximumWorkingSetSize, PageFaults, and PeakVirtualSize. These attributes are stored as scalar variables in the tabular variable, and they can be accessed by using the dot notation, such as WMI Query.Name or WMI Query.MaximumWorkingSetSize. Therefore, the most probable results of the image are a tabular variable named 'WMI Query' and two scalar variables named 'MaximumWorkingSetSize' and 'PeakVirtualSize'.

Pattern Designer | WMI Query

Win32_Process class

WQL (SQL for WMI)

Answer: C

Explanation:

The Parse Variable pattern operation allows you to extract information from the output of a previous operation and save it in a variable. You can choose from different parsing methods, such as JSON File, XML File, Regular Expression, or Custom Script. To have two different parsing methods to populate variables, you need to use two different steps, each with a different Define Parsing selection. For example, you can use one step to parse a JSON file and another step to parse an XML file. You cannot use two different parsing methods on the same step, as the Define Parsing selection is unique for each step.

Parse command output: This article explains how to use the Parse command output operation and the different parsing methods available.

Pattern Designer: Parse Variable - JSON File gives error: This article provides a troubleshooting tip for using the JSON File parsing method.

Examples of EVAL scripts used in Discovery patterns: This article provides some examples of custom scripts that can be used for the Custom Script parsing method.

Answer: C

Explanation:

When designing steps with operations requiring variables, it is best practice to query targets for variables1. This allows you to dynamically obtain the values of the variables from the target devices, rather than hard coding them or using scalar variables that may not reflect the current state of the target. Querying targets for variables also enables you to design for a dynamic environment, where the target configuration may change over time.

1:Define discovery steps

Answer: C

Explanation:

The Parse File operation is used to extract information from a file and create variables to contain the extracted information1.The two main options within a Parse File operation areSelect FileandDefine Parsing2. Select File allows you to specify the file path or browse to the file.Define Parsing allows you to select the relevant parsing strategy and define parsing criteria2.

1:Parse a file

2:Define discovery steps