IBM C1000-156 Practice Exams
Last updated on Oct 21,2026- Exam Code: C1000-156
- Exam Name: IBM Security QRadar SIEM V7.5 Administration
- Certification Provider: IBM
- Latest update: Oct 21,2026
Question #21
An administrator is evaluating domain criteria based on an event. The result of a regular expression that was defined in a custom property does not match a domain mapping, and the event was automatically assigned to the default domain.
What is the order of precedence if the event does not match the domain definition for custom properties?
- A . Log source. Log source group, App Hosts
- B . Log source, Log source group, Event collector or data gateway, DDS
- C . DLC. Log source, Log source group, Event collector or data gateway
- D . DLS, Log source, Event collector or data gateway. Log source group
Correct Answer: B
B
Explanation:
In QRadar, when evaluating domain criteria based on an event, the precedence order for domain assignment if the event does not match the domain definition for custom properties is as follows:
Log Source: The first criterion checked is the log source. Each event is associated with a log source, and the domain is determined based on this source.
Log Source Group: If the log source does not provide a domain match, the next criterion is the log source group. Log sources can be grouped together, and domain definitions can be applied at the group level.
Event Collector or Data Gateway: If neither the log source nor the log source group provides a match, QRadar checks the event collector or data gateway for a domain definition.
DDS (Data Domain Service): As the final step, if no other criteria match, the DDS is used to assign the default domain.
This order of precedence ensures that the most specific criteria are checked first before falling back to more general criteria, ensuring accurate domain assignment for events.
Reference
IBM Security QRadar SIEM and IBM Security QRadar EDR integration.pdf
B
Explanation:
In QRadar, when evaluating domain criteria based on an event, the precedence order for domain assignment if the event does not match the domain definition for custom properties is as follows:
Log Source: The first criterion checked is the log source. Each event is associated with a log source, and the domain is determined based on this source.
Log Source Group: If the log source does not provide a domain match, the next criterion is the log source group. Log sources can be grouped together, and domain definitions can be applied at the group level.
Event Collector or Data Gateway: If neither the log source nor the log source group provides a match, QRadar checks the event collector or data gateway for a domain definition.
DDS (Data Domain Service): As the final step, if no other criteria match, the DDS is used to assign the default domain.
This order of precedence ensures that the most specific criteria are checked first before falling back to more general criteria, ensuring accurate domain assignment for events.
Reference
IBM Security QRadar SIEM and IBM Security QRadar EDR integration.pdf
Question #22
A user reports that some data points are missing from a generated report.
The logs show these notifications, which are determined to be the root cause of the problem:
The accumulator was unable to aggregate all events/flows for this interval.
In what timeframe does this system need to complete data aggregation for it to be deemed successful?
- A . 30 seconds
- B . 5 seconds
- C . 120 seconds
- D . 60 seconds
Correct Answer: D
D
Explanation:
In IBM QRadar SIEM V7.5, the accumulator process must complete data aggregation within a specific timeframe to be deemed successful:
Timeframe: 60 seconds
Aggregation Process: The accumulator aggregates events and flows for reporting and analysis. If it cannot complete this task within 60 seconds, it is considered unsuccessful.
Impact: Failure to aggregate within the specified timeframe can result in missing data points in reports and dashboards, affecting the accuracy and completeness of the information presented.
Reference
The QRadar SIEM administration guides detail the accumulator process and the importance of completing data aggregation within 60 seconds to ensure accurate reporting.
D
Explanation:
In IBM QRadar SIEM V7.5, the accumulator process must complete data aggregation within a specific timeframe to be deemed successful:
Timeframe: 60 seconds
Aggregation Process: The accumulator aggregates events and flows for reporting and analysis. If it cannot complete this task within 60 seconds, it is considered unsuccessful.
Impact: Failure to aggregate within the specified timeframe can result in missing data points in reports and dashboards, affecting the accuracy and completeness of the information presented.
Reference
The QRadar SIEM administration guides detail the accumulator process and the importance of completing data aggregation within 60 seconds to ensure accurate reporting.
Question #23
When creating an identity exclusion search, what time range do you select?
- A . Previous 7 days
- B . Real time (streaming)
- C . Previous 30 days
- D . Previous 5 minutes
Correct Answer: B
B
Explanation:
When creating an identity exclusion search in IBM QRadar SIEM V7.5, the time range selected is "Real time (streaming)." This setting ensures that the search continuously monitors and excludes identities in real-time as data is ingested.
Here’s the process:
Real-time Monitoring: Continuously updates the search results based on incoming data, providing immediate exclusion of specified identities.
Streaming Data: Processes data in a live stream, ensuring that the exclusion criteria are applied instantaneously as new events occur.
Reference
The setup and configuration of identity exclusion searches are detailed in the QRadar SIEM administration guides, highlighting the importance of real-time streaming for effective identity management.
B
Explanation:
When creating an identity exclusion search in IBM QRadar SIEM V7.5, the time range selected is "Real time (streaming)." This setting ensures that the search continuously monitors and excludes identities in real-time as data is ingested.
Here’s the process:
Real-time Monitoring: Continuously updates the search results based on incoming data, providing immediate exclusion of specified identities.
Streaming Data: Processes data in a live stream, ensuring that the exclusion criteria are applied instantaneously as new events occur.
Reference
The setup and configuration of identity exclusion searches are detailed in the QRadar SIEM administration guides, highlighting the importance of real-time streaming for effective identity management.
Question #24
Which QRadar components can be updated via the IBM Security App Exchange and QRadar Application Repository?
- A . Applications only
- B . Rules only
- C . Reports only
- D . Applications, rules, and reports
Correct Answer: D
Question #25
How many vulnerability processors can you have in your deployment?
- A . 5
- B . 3
- C . 10
- D . 1
Correct Answer: D
D
Explanation:
In QRadar SIEM V7.5, the number of vulnerability processors is limited to 1.
These vulnerability processors are responsible for handling and processing vulnerability data within the system.
Having multiple vulnerability processors is not supported in this version of QRadar.
Reference: IBM QRadar SIEM V7.5 Administration documentation.
D
Explanation:
In QRadar SIEM V7.5, the number of vulnerability processors is limited to 1.
These vulnerability processors are responsible for handling and processing vulnerability data within the system.
Having multiple vulnerability processors is not supported in this version of QRadar.
Reference: IBM QRadar SIEM V7.5 Administration documentation.
Question #26
What is the REST API interface to install and manage applications that are created by using the GUI Application Framework Software Development Kit?
- A . /api/gui_app_framework
- B . /api/data_classification
- C . /api/system
- D . /api/siem
Correct Answer: A
A
Explanation:
The primary method used by IBM QRadar to install and manage applications created using the GUI Application Framework Software Development Kit (SDK) is through the REST API interface:
API Endpoint: /api/gui_app_framework
Functionality: This endpoint allows administrators to manage the lifecycle of applications, including installation, updates, and removal.
Integration: Provides seamless integration with the GUI Application Framework, enabling the development and deployment of custom applications within QRadar.
Reference
The IBM QRadar API documentation provides details on the /api/gui_app_framework endpoint and its usage for managing GUI applications.
A
Explanation:
The primary method used by IBM QRadar to install and manage applications created using the GUI Application Framework Software Development Kit (SDK) is through the REST API interface:
API Endpoint: /api/gui_app_framework
Functionality: This endpoint allows administrators to manage the lifecycle of applications, including installation, updates, and removal.
Integration: Provides seamless integration with the GUI Application Framework, enabling the development and deployment of custom applications within QRadar.
Reference
The IBM QRadar API documentation provides details on the /api/gui_app_framework endpoint and its usage for managing GUI applications.
Question #27
Which three (3) resource restriction types are available in QRadar?
- A . Role-based restrictions
- B . Tenant-based restrictions
- C . User-based restrictions
- D . Service-based restrictions
- E . Event-based restrictions
- F . Domain-based restrictions
Correct Answer: A, B, F
A, B, F
Explanation:
IBM QRadar SIEM V7.5 provides several types of resource restriction mechanisms to manage access control and data visibility.
The three main types are:
Role-based restrictions: These restrictions limit what actions users can perform based on their assigned roles. Each role has specific permissions that dictate access to different functionalities and data within QRadar.
Tenant-based restrictions: This type of restriction is used in multi-tenant environments, where different tenants (organizational units) need to have isolated views and access to their data. Tenant-
based restrictions ensure that users from one tenant cannot access data from another tenant.
Domain-based restrictions: Domains in QRadar are used to segment data logically. Domain-based restrictions control which data is visible to users based on the domains they have been granted access to.
These restriction types ensure that access control is granular and adheres to organizational security policies.
Reference
IBM QRadar SIEM documentation outlines the use of role-based, tenant-based, and domain-based restrictions for managing access control and data visibility.
A, B, F
Explanation:
IBM QRadar SIEM V7.5 provides several types of resource restriction mechanisms to manage access control and data visibility.
The three main types are:
Role-based restrictions: These restrictions limit what actions users can perform based on their assigned roles. Each role has specific permissions that dictate access to different functionalities and data within QRadar.
Tenant-based restrictions: This type of restriction is used in multi-tenant environments, where different tenants (organizational units) need to have isolated views and access to their data. Tenant-
based restrictions ensure that users from one tenant cannot access data from another tenant.
Domain-based restrictions: Domains in QRadar are used to segment data logically. Domain-based restrictions control which data is visible to users based on the domains they have been granted access to.
These restriction types ensure that access control is granular and adheres to organizational security policies.
Reference
IBM QRadar SIEM documentation outlines the use of role-based, tenant-based, and domain-based restrictions for managing access control and data visibility.
Question #28
Which is the default port for the first NetFlow flow source that is configured in QRadar?
- A . 8413
- B . 21
- C . 2055
- D . 514
Correct Answer: C
C
Explanation:
The default port for the first NetFlow flow source configured in QRadar is 2055. Here’s a detailed explanation:
NetFlow Flow Sources: NetFlow is a network protocol developed by Cisco for collecting IP traffic information. QRadar can be configured to receive NetFlow data to monitor and analyze network traffic.
Default Port: When setting up the first NetFlow flow source in QRadar, the system uses port 2055 by default. This is a standard port commonly used for NetFlow traffic.
Configuration: During the configuration process, this default port can be used to receive data from devices that export NetFlow data, such as routers and switches.
Using port 2055 helps standardize the setup process and ensures compatibility with most NetFlow-
enabled devices.
Reference
IBM Security QRadar SIEM and IBM Security QRadar EDR integration.pdf
C
Explanation:
The default port for the first NetFlow flow source configured in QRadar is 2055. Here’s a detailed explanation:
NetFlow Flow Sources: NetFlow is a network protocol developed by Cisco for collecting IP traffic information. QRadar can be configured to receive NetFlow data to monitor and analyze network traffic.
Default Port: When setting up the first NetFlow flow source in QRadar, the system uses port 2055 by default. This is a standard port commonly used for NetFlow traffic.
Configuration: During the configuration process, this default port can be used to receive data from devices that export NetFlow data, such as routers and switches.
Using port 2055 helps standardize the setup process and ensures compatibility with most NetFlow-
enabled devices.
Reference
IBM Security QRadar SIEM and IBM Security QRadar EDR integration.pdf
Question #29
When do you consider reconfiguring your QRadar environment to a distributed deployment?
- A . When flow sources reach a threshold of 20 Mbps
- B . When processing or storage expands beyond capacity on your single deployed appliance
- C . When you need to upgrade the Log Source Manager application
- D . When your combined log sources are less than 2000 events per second
Correct Answer: B
B
Explanation:
Reconfiguring your IBM QRadar environment to a distributed deployment is considered under the following circumstances:
Capacity Limits: When the processing or storage requirements of your QRadar environment exceed the capacity of a single appliance, it becomes necessary to distribute the workload across multiple systems.
Performance Improvement: A distributed deployment allows for better load balancing and performance optimization by distributing event and flow processing tasks.
Scalability: As your organization’s data volume grows, a distributed deployment ensures that QRadar can handle the increased load without degradation in performance.
Reference
IBM QRadar SIEM administration guides discuss the considerations and benefits of moving to a distributed deployment when scaling beyond the capacity of a single appliance.
B
Explanation:
Reconfiguring your IBM QRadar environment to a distributed deployment is considered under the following circumstances:
Capacity Limits: When the processing or storage requirements of your QRadar environment exceed the capacity of a single appliance, it becomes necessary to distribute the workload across multiple systems.
Performance Improvement: A distributed deployment allows for better load balancing and performance optimization by distributing event and flow processing tasks.
Scalability: As your organization’s data volume grows, a distributed deployment ensures that QRadar can handle the increased load without degradation in performance.
Reference
IBM QRadar SIEM administration guides discuss the considerations and benefits of moving to a distributed deployment when scaling beyond the capacity of a single appliance.
Question #30
Domain assignments lake precedence over the settings of which other elements from a security profile?
- A . Security profiles, Networks, and Log Sources tabs
- B . Security profiles. Networks, and Domains
- C . Permission Precedence, and Log Sources tabs
- D . Permission Precedence. Networks, and Log Sources tabs
Correct Answer: D
D
Explanation:
In IBM QRadar SIEM, domain assignments take precedence over the settings of other elements from a security profile, specifically Permission Precedence, Networks, and Log Sources tabs. This hierarchical precedence ensures that the domain settings are enforced across different security configurations. The domain settings effectively override other configurations to maintain consistency and security across the environment. This structure helps in managing access and permissions more effectively by ensuring that the domain-level policies are the primary controlling factor.
Reference
QRadar SIEM V7.5 Administration Guide – Chapter on Domain Management and Security Profiles
D
Explanation:
In IBM QRadar SIEM, domain assignments take precedence over the settings of other elements from a security profile, specifically Permission Precedence, Networks, and Log Sources tabs. This hierarchical precedence ensures that the domain settings are enforced across different security configurations. The domain settings effectively override other configurations to maintain consistency and security across the environment. This structure helps in managing access and permissions more effectively by ensuring that the domain-level policies are the primary controlling factor.
Reference
QRadar SIEM V7.5 Administration Guide – Chapter on Domain Management and Security Profiles