Podcast
Questions and Answers
Which statement best describes a Node in ROS 2?
Which statement best describes a Node in ROS 2?
In ROS 2 (Python), which is the typical way to create a node?
In ROS 2 (Python), which is the typical way to create a node?
Which of the following is NOT true about ROS 2 nodes?
Which of the following is NOT true about ROS 2 nodes?
In ROS 2, a topic is best described as:
In ROS 2, a topic is best described as:
Which command-line tool can be used in ROS 2 to list all active topics?
Which command-line tool can be used in ROS 2 to list all active topics?
When a node publishes on a topic in ROS 2:
When a node publishes on a topic in ROS 2:
In ROS 2, a message is:
In ROS 2, a message is:
Which command is used in ROS 2 to display the fields of a message type?
Which command is used in ROS 2 to display the fields of a message type?
Which of the following is NOT a valid message type in the standard ROS 2 message libraries?
Which of the following is NOT a valid message type in the standard ROS 2 message libraries?
In ROS 2, a Service is:
In ROS 2, a Service is:
Which command is used to list active services in ROS 2?
Which command is used to list active services in ROS 2?
When calling a service in ROS 2, the client typically:
When calling a service in ROS 2, the client typically:
Which best describes an action in ROS 2?
Which best describes an action in ROS 2?
Which command in ROS 2 can be used to list action servers?
Which command in ROS 2 can be used to list action servers?
In ROS 2’s action communication, which type of message is NOT part of the action interface?
In ROS 2’s action communication, which type of message is NOT part of the action interface?
URDF stands for:
URDF stands for:
In a URDF file, elements such as and are used to:
In a URDF file, elements such as and
Which of the following is NOT typically described by URDF?
Which of the following is NOT typically described by URDF?
SDF stands for:
SDF stands for:
Which statement is true about SDF compared to URDF?
Which statement is true about SDF compared to URDF?
In SDF, which element is commonly used to define friction, bounce, and contact parameters?
In SDF, which element is commonly used to define friction, bounce, and contact parameters?
SLAM stands for:
SLAM stands for:
In ROS 2, a common sensor type for SLAM is:
In ROS 2, a common sensor type for SLAM is:
Which of the following is often used in ROS (and ROS 2) for 2D SLAM?
Which of the following is often used in ROS (and ROS 2) for 2D SLAM?
Mapping in ROS 2 typically refers to:
Mapping in ROS 2 typically refers to:
When performing mapping, it is crucial to have:
When performing mapping, it is crucial to have:
In a 2D occupancy grid map, a cell value of 100 typically represents:
In a 2D occupancy grid map, a cell value of 100 typically represents:
Localization in ROS 2 is the process of:
Localization in ROS 2 is the process of:
Which of the following is a common ROS 2 package for 2D localization?
Which of the following is a common ROS 2 package for 2D localization?
Successful localization generally requires:
Successful localization generally requires:
MCL stands for:
MCL stands for:
In Monte Carlo Localization, the robot’s pose is estimated by:
In Monte Carlo Localization, the robot’s pose is estimated by:
Which sensor data is commonly used by MCL for the correction step in 2D localization?
Which sensor data is commonly used by MCL for the correction step in 2D localization?
Nav2 in ROS 2 is:
Nav2 in ROS 2 is:
Which of the following is a component of the Nav2 stack?
Which of the following is a component of the Nav2 stack?
Nav2 uses which concept to handle node states and transitions?
Nav2 uses which concept to handle node states and transitions?
In ROS 2, launch files can be written in:
In ROS 2, launch files can be written in:
Which statement about ROS 2 launch files is true?
Which statement about ROS 2 launch files is true?
Which command is used to start a launch file in ROS 2?
Which command is used to start a launch file in ROS 2?
Topic remapping in ROS 2 is used to:
Topic remapping in ROS 2 is used to:
Which syntax is typically used in the command line for remapping cmd_vel to /robot/cmd_vel?
Which syntax is typically used in the command line for remapping cmd_vel to /robot/cmd_vel?
Remapping can be configured:
Remapping can be configured:
In ROS 2, a parameter is:
In ROS 2, a parameter is:
Which command can you use to list parameters of a node (e.g., /my_node) in ROS 2?
Which command can you use to list parameters of a node (e.g., /my_node) in ROS 2?
When a ROS 2 parameter is dynamically changed:
When a ROS 2 parameter is dynamically changed:
Gazebo is:
Gazebo is:
Which file format does Gazebo primarily use for defining robots and worlds?
Which file format does Gazebo primarily use for defining robots and worlds?
In a Gazebo simulation, plugins are used to:
In a Gazebo simulation, plugins are used to:
Which middleware does ROS 2 primarily use for communication?
Which middleware does ROS 2 primarily use for communication?
Which statement is true regarding ROS 2’s architecture compared to ROS 1?
Which statement is true regarding ROS 2’s architecture compared to ROS 1?
Flashcards
ROS 2 Node
ROS 2 Node
An independent process communicating via topics, services, and actions.
Creating a ROS 2 Node (Python)
Creating a ROS 2 Node (Python)
Creating an instance of the 'Node' class within the 'rclpy' library.
ROS 2 Node Capabilities
ROS 2 Node Capabilities
Nodes can have publishers and subscribers.
ROS 2 Topic
ROS 2 Topic
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List Active Topics (ROS 2)
List Active Topics (ROS 2)
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Publishing on a ROS 2 Topic
Publishing on a ROS 2 Topic
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ROS 2 Message
ROS 2 Message
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Display Message Fields (ROS 2)
Display Message Fields (ROS 2)
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Invalid ROS 2 Message Type
Invalid ROS 2 Message Type
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ROS 2 Service
ROS 2 Service
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List Active Services (ROS 2)
List Active Services (ROS 2)
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Calling a ROS 2 Service
Calling a ROS 2 Service
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ROS 2 Action
ROS 2 Action
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List Action Servers (ROS 2)
List Action Servers (ROS 2)
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Not a ROS 2 Action Message
Not a ROS 2 Action Message
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URDF Stands For
URDF Stands For
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URDF Elements (, )
URDF Elements (,
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Typical URDF Description
Typical URDF Description
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SDF Stands For
SDF Stands For
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SDF Compared to URDF
SDF Compared to URDF
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SDF Element for Physics Parameters
SDF Element for Physics Parameters
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SLAM Stands For
SLAM Stands For
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Common Sensor Type for SLAM (ROS 2)
Common Sensor Type for SLAM (ROS 2)
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