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

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Total 62 questions
Question 1

Which authentication type in QRadar encrypts the username and password and forwards the username and password to the external server for authentication?



Answer : C

TACACS (Terminal Access Controller Access-Control System) authentication is a protocol used in IBM QRadar SIEM V7.5 for authenticating users by forwarding their credentials to an external server. Here's how it works:

Encryption: TACACS encrypts the entire payload of the authentication packet, including the username and password, ensuring secure transmission.

Forwarding Credentials: After encryption, the credentials are forwarded to an external TACACS server, which performs the actual authentication.

Authentication Process: The external server checks the credentials against its database and sends a response back to QRadar indicating whether the authentication is successful or not.

Reference IBM QRadar SIEM documentation explains TACACS authentication in detail, highlighting its secure encryption and external server verification process.


Question 2

From which two (2) resources can an administrator download QRadar security content?



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.


Question 3

What is the main reason for tuning a building block?



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.


Question 4

A QRadar administrator needs to quickly check the disk space for all managed hosts. Which command does the administrator use?



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.


Question 5

When adjusting a custom email template, which two elements do you edit to include the customizations?



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.


Question 6

In the QRadar GUI. you notice that no new offenses were generated today. A review of the notifications shows:

MPC: Unable to create new offense. The maximum number of active offenses has been reached.

What is the default value of the maximum number?



Answer : D

In IBM QRadar SIEM V7.5, the default value for the maximum number of active offenses is set to 2500. This limit is in place to manage system performance and ensure efficient processing of security incidents. Here's the detailed information:

Default Setting: The default setting for the maximum number of active offenses is 2500.

Impact: If this limit is reached, QRadar will not generate new offenses until some of the existing offenses are closed or archived.

Configuration: Administrators can adjust this setting based on their organizational needs, but the default value is 2500.

Reference This information is detailed in the QRadar SIEM configuration and tuning guides, which specify default settings and provide instructions for modifying the maximum number of active offenses if necessary.


Question 7

What is the default day and time setting for when QRadar generates weekly reports?



Answer : A

In IBM QRadar SIEM V7.5, the default setting for generating weekly reports is configured to occur on:

Day: Sunday

This setting ensures that the reports are generated during a typical low-activity period, minimizing the impact on system performance and ensuring that the latest data from the previous week is included.

Reference The default configuration for report generation times is specified in the IBM QRadar SIEM V7.5 administration and user documentation.


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