ShunyaEkai Technologies Interview Questions, Process, and Tips

ROS topics are communication channels for exchanging data between nodes in a Robotics system.

• ROS topics are named buses where nodes can publish or subscribe to messages.

• Nodes can publish data to a topic, and other nodes can subscribe to that topic to receive the data.

• Topics enable asynchronous communication between nodes in a distributed system.

• Topics can be used to transmit sensor data, control commands, or any other ...read more

The Raspberry Pi (RPI) has a varying number of GPIO pins depending on the model.

• The original Raspberry Pi Model A and B have 26 GPIO pins.

• The newer Raspberry Pi Model B+ and later models have 40 GPIO pins.

• Some Raspberry Pi models also have additional GPIO pins dedicated to specific functions like I2C or SPI.

• GPIO pins can be used to connect and control external devices such as sensors, motors, and LEDs.

PointCloud2 is a message type in ROS for representing 3D point cloud data.

• PointCloud2 is used to store and transmit large amounts of 3D point cloud data.

• It is a flexible and efficient way to represent point cloud data in ROS.

• PointCloud2 messages consist of a header and a data field, which contains the actual point cloud data.

• The data field is organized as a binary blob, allowing for different data types and structures ...read more

DH parameters are a set of four parameters used to describe the kinematics of a robotic manipulator.

• DH parameters define the geometry and motion of each joint in a robot

• They include parameters such as link lengths, joint angles, and link offsets

• DH parameters are commonly used in robotics to model and control robot manipulators

• They are used to calculate the transformation matrices between adjacent links in a robot arm