Robotic Operating System (ROS) MCQs December 22, 2025August 10, 2024 by u930973931_answers 50 min Score: 0 Attempted: 0/50 Subscribe 1. What does ROS stand for? (A) Robotic Online System (B) Robot Operating System (C) Robotic Operating Software (D) Robot Online Software 2. What is the main purpose of ROS? (A) To offer a framework for developing robot software (B) To provide a simulation environment for robots (C) To control robotic hardware directly (D) To replace robotic hardware 3. Which ROS component handles communication between different parts of a robotic system? (A) Nodes (B) Middleware (C) Services (D) Topics 4. What is a “ROS node”? (A) A process that performs computation in ROS (B) A physical component of a robot (C) A data storage unit in ROS (D) A hardware interface in ROS 5. In ROS, what is a “topic”? (A) A method for storing robot data (B) A type of robotic sensor (C) A communication channel for nodes to exchange messages (D) A method for controlling robot movement 6. What is the purpose of a “service” in ROS? (A) To store robot configurations (B) To manage node execution (C) To provide a way for nodes to request and receive data (D) To handle robot hardware interfaces 7. Which ROS command is used to initialize a ROS environment? (A) rosstart (B) rosinit (C) roscore (D) roslaunch 8. In ROS, what does the roslaunch command do? (A) Initializes the ROS environment (B) Starts the ROS master and nodes specified in a launch file (C) Launches a simulation environment (D) Compiles ROS packages 9. What is a “ROS package”? (A) A collection of nodes, libraries, and configuration files for a specific functionality (B) A type of robot sensor (C) A physical hardware unit (D) A command for robot movement 10. Which file in a ROS package contains configuration information for nodes and parameters? (A) CMakeLists.txt (B) package.xml (C) config.yaml (D) launch file 11. What is the role of the rosparam command in ROS? (A) To handle communication between nodes (B) To initialize the ROS environment (C) To launch ROS nodes (D) To manage and set parameters in the ROS parameter server 12. Which ROS tool is used to visualize data from topics and services? (A) gazebo (B) rosbag (C) rqt (D) rviz 13. What does the rosbag command do? (A) Records and plays back ROS topic data (B) Launches ROS nodes (C) Manages ROS parameters (D) Visualizes sensor data 14. Which ROS tool is used to create and manage robot simulations? (A) rviz (B) roslaunch (C) rqt (D) gazebo 15. What is a “ROS message”? (A) A data structure used for communication between ROS nodes (B) A command to initialize ROS nodes (C) A configuration file for ROS packages (D) A type of robot sensor 16. In ROS, what is the purpose of the catkin_make command? (A) To record ROS data (B) To launch ROS nodes (C) To manage ROS parameters (D) To build and compile ROS packages 17. What does the rosnode command do? (A) Records ROS topic data (B) Launches new ROS nodes (C) Provides information about running ROS nodes (D) Manages ROS parameters 18. What is a “ROS action”? (A) A goal-oriented communication mechanism allowing for feedback and result reporting (B) A method for handling hardware interfaces (C) A configuration file for ROS nodes (D) A type of ROS message 19. Which file is used to specify the dependencies of a ROS package? (A) CMakeLists.txt (B) package.xml (C) config.yaml (D) launch file 20. What is the rqt tool used for in ROS? (A) To record ROS data (B) To build and compile ROS packages (C) To provide a graphical user interface for monitoring and controlling ROS nodes (D) To create and manage simulations 21. Which ROS command is used to view the list of available topics? (A) rostopic list (B) rosnode info (C) roslaunch (D) rosparam 22. What does the rosservice command allow you to do? (A) Record and play back ROS data (B) Interact with and manage ROS services (C) Build and compile ROS packages (D) Launch new ROS nodes 23. Which ROS tool is used to debug and visualize the internal state of ROS nodes? (A) rosbag (B) rviz (C) gazebo (D) rqt 24. What is the purpose of the roslaunch file in a ROS package? (A) To build and compile ROS packages (B) To record and play back ROS data (C) To automate the launching of multiple nodes and set parameters (D) To visualize sensor data 25. Which ROS command is used to check the status of the ROS master? (A) rosmaster (B) rosnode list (C) rostopic info (D) roscore 26. What does the rosparam command do in ROS? (A) Records and plays back ROS topic data (B) Builds and compiles ROS packages (C) Allows you to get and set parameters on the ROS parameter server (D) Launches ROS nodes 27. What is a “ROS plugin”? (A) A type of ROS node (B) A hardware interface for robots (C) A modular piece of software that extends the functionality of ROS tools (D) A configuration file for ROS packages 28. In ROS, what is the “parameter server” used for? (A) To build and compile ROS packages (B) To store and manage global parameters that can be accessed by ROS nodes (C) To record and play back ROS topic data (D) To visualize sensor data 29. What is the rosbag tool used for? (A) To launch ROS nodes (B) To manage ROS parameters (C) To record and replay ROS topic data (D) To visualize sensor data 30. Which ROS command is used to display information about a specific topic? (A) rosnode info (B) rostopic info (C) rosservice info (D) rosparam get 31. What is the gazebo simulator used for in ROS? (A) To visualize ROS topics (B) To manage ROS parameters (C) To record and play back ROS data (D) To create and test robot simulations 32. What does the rqt_graph tool visualize? (A) The communication graph of ROS nodes and topics (B) The internal state of ROS nodes (C) The simulation environment (D) The data recorded by rosbag 33. What is the role of the rqt_console tool in ROS? (A) To create and manage simulations (B) To view and analyze ROS log messages (C) To build and compile ROS packages (D) To visualize sensor data 34. Which file in a ROS package defines the build configuration and dependencies? (A) package.xml (B) CMakeLists.txt (C) config.yaml (D) launch file 35. What does the roscd command do? (A) Changes the current directory to a ROS package directory (B) Compiles ROS packages (C) Launches ROS nodes (D) Records ROS data 36. What is the primary purpose of the roslaunch tool? (A) To record and play back ROS data (B) To start nodes and set parameters as specified in a launch file (C) To manage ROS parameters (D) To visualize sensor data 37. What is the role of the rosdep tool in ROS? (A) To record and replay ROS data (B) To build and compile ROS packages (C) To install system dependencies for ROS packages (D) To manage ROS parameters 38. Which ROS command is used to list all available services? (A) rosparam list (B) rosnode list (C) rostopic list (D) rosservice list 39. What is the purpose of the rostopic command? (A) To record and play back ROS data (B) To interact with and manage ROS topics (C) To visualize sensor data (D) To build and compile ROS packages 40. What does the rosnode kill command do? (A) Visualizes ROS data (B) Starts a new ROS node (C) Records ROS topic data (D) Terminates a running ROS node 41. In ROS, what is the primary function of a “message filter”? (A) To process and synchronize incoming messages from different topics (B) To visualize sensor data (C) To build and compile ROS packages (D) To manage ROS parameters 42. What does the roswtf tool do? (A) Checks for common configuration errors and issues in a ROS setup (B) Manages ROS parameters (C) Records and plays back ROS data (D) Builds and compiles ROS packages 43. Which ROS tool is specifically designed for real-time visualization of robot sensor data? (A) rosbag (B) gazebo (C) rqt (D) rviz 44. What is the purpose of the rosdep command? (A) To build and compile ROS packages (B) To record and play back ROS data (C) To visualize ROS topics (D) To resolve and install dependencies required by ROS packages 45. What type of data does a ROS “diagnostic” message typically contain? (A) Commands for controlling robot movement (B) Configuration details for ROS packages (C) Recorded sensor data (D) Information about the health and status of ROS nodes and hardware 46. In ROS, what is the purpose of a “launch file”? (A) To record and play back ROS data (B) To manage ROS parameters (C) To define and start multiple nodes and their configurations simultaneously (D) To visualize sensor data 47. Which ROS command is used to check the available nodes? (A) rosservice list (B) rostopic list (C) rosnode list (D) rosparam list 48. What is the primary role of the “rqt_robot_steering” plugin? (A) To provide a graphical interface for manually controlling robot movement (B) To visualize robot sensor data (C) To manage ROS parameters (D) To record and play back ROS data 49. What does the “rqt_graph” tool visualize in a ROS system? (A) The internal state of ROS nodes (B) The simulation environment (C) The communication graph between nodes and topics (D) The data recorded by rosbag 50. What is a “ROS driver”? (A) A type of ROS node (B) Software that interacts with hardware devices and provides data to ROS nodes (C) A configuration file for ROS packages (D) A visualization tool