IBM Security QRadar SIEM V7.5 Administration C1000-156 Exam Practice Test

Answer : B

Tuning a building block in IBM QRadar SIEM V7.5 is primarily aimed at reducing the number of false positives. This process involves adjusting the rules and logic within the building block to better differentiate between normal and suspicious activity. Here's the detailed explanation:

False Positives: High numbers of false positives can overwhelm analysts and obscure genuine threats. Tuning helps in refining detection criteria to reduce these false alarms.

Rule Adjustments: Modifying the thresholds, conditions, and filters within the building block rules to ensure they more accurately reflect the environment's typical behavior.

Improved Accuracy: Enhanced precision in detecting true security incidents, thus improving the overall effectiveness of the SIEM solution.

Reference IBM QRadar SIEM administration guides and best practice documents emphasize the importance of tuning to minimize false positives, ensuring more actionable alerts.

Answer : D

To check an IP address against the Spam X-Force category with a confidence greater than 3 using an advanced search query in QRadar, the correct query format is:

Query Structure: select * from events where XF0RCE_IP_C0NFIDENCE('Malware',sourceip)>3

Components:

select * from events: This part of the query selects all events from the QRadar events database.

where XF0RCE_IP_C0NFIDENCE('Malware',sourceip)>3: This filter checks if the source IP address has a confidence level greater than 3 for being associated with malware according to the X-Force category.

This query is designed to filter out and display events where the source IP is identified with high confidence as being associated with malicious activity.

Reference The syntax and usage of advanced search queries are detailed in the IBM QRadar SIEM search and analytics guides, providing specific examples for utilizing X-Force threat intelligence data.

Answer : A, E

Administrators can download QRadar security content from the following two resources:

QRadar Application Repository: This repository contains a wide range of applications, rules, reports, and other content specifically designed for QRadar.

IBM Security App Exchange: A platform where users can find and download security applications, including those for QRadar. It offers a variety of tools to extend and enhance the functionality of QRadar SIEM.

These resources provide curated and validated security content, ensuring that administrators have access to the latest and most effective tools for their security needs.

Reference IBM QRadar documentation and support resources detail the QRadar Application Repository and IBM Security App Exchange as primary sources for downloading and updating QRadar security content.

Answer : A

The primary method used by IBM QRadar SIEM V7.5 to alert users to problems is through System Notifications. Here's how it works:

System Notifications: These are alerts generated by QRadar to inform users of various issues, such as system performance problems, license issues, or security incidents.

Visibility: Notifications are prominently displayed in the QRadar GUI, ensuring that administrators and users can quickly identify and respond to any problems.

Customization: Users can configure notification settings to receive alerts for specific types of issues, ensuring they stay informed about critical aspects of the system's health and performance.

Reference IBM QRadar SIEM documentation outlines the use of System Notifications as the primary method for alerting users to issues, detailing how to configure and manage these alerts.

Answer : C

To quickly check the disk space for all managed hosts in IBM QRadar SIEM V7.5, the administrator uses the following command:

Command: /opt/qradar/support/all_servers.sh -C -k 'df -Th'

Function: This command checks the disk space across all managed hosts, providing detailed information about the filesystem types and disk usage.

Parameters:

-C: Executes the command on all managed hosts.

-k: Keeps the output in a human-readable format.

'df -Th': The specific command to display the disk space usage in a tabular format with human-readable file sizes.

Reference The IBM QRadar SIEM documentation provides a comprehensive list of commands for system administration, including those for checking disk space on managed hosts.

Answer : C

In IBM QRadar SIEM V7.5, the license giveback rate can be viewed in the License Pool Management section. Here's the step-by-step process:

Access Admin Tab: The administrator needs to navigate to the Admin tab in the QRadar GUI.

License Pool Management: Under the Admin tab, there is an option for License Pool Management.

View License Giveback Rate: Within the License Pool Management section, the administrator can view details about license usage, including the giveback rate.

Reference The QRadar SIEM administration guide provides detailed steps on accessing and managing license information, including the giveback rate, under the Admin tab.

Answer : D

When adjusting a custom email template in IBM QRadar SIEM V7.5, the two elements that need to be edited to include customizations are:

<subject>: This element defines the subject line of the email, which can be customized to provide a clear and relevant description of the email's content.

<body>: This element contains the main content of the email. Customizing the body allows administrators to include specific information, formatting, and messages relevant to the recipient.

Customizing these elements ensures that the email notifications are informative and tailored to the needs of the recipients.

Reference The QRadar SIEM user and configuration guides provide instructions on customizing email templates, highlighting the <subject> and <body> elements as key areas for customization.