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Hi, I just finished the questionnaire and I thought it'd be very interesting to share them to see what other possibilities there is for some answers and in that way learn a bit more about ROS.

Here are mine:

How do you find the sensor_msgs package? rospack find sensor_msgs

What is the path of the sensor_msgs package? /opt/ros/electric/stacks/common_msgs/sensor_msgs

What ROS messages are defined in the sensor_msgs package? vim manifest

msg/CameraInfo.msg msg/JointState.msg msg/PointCloud.msg msg/ChannelFloat32.msg msg/LaserScan.msg msg/PointField.msg msg/CompressedImage.msg msg/NavSatFix.msg msg/Range.msg msg/Image.msg msg/NavSatStatus.msg msg/RegionOfInterest.msg msg/Imu.msg msg/PointCloud2.msg msg/Joy.msg msg/JoyFeedback.msg msg/JoyFeedbackArray.msg

What nodes and topics are created when running roscore? /rosout

What ROS packages does the roscpp_tutorials package depend on? rospack depends roscpp_tutorials

rosbuild roslang cpp_common roscpp_traits rostime roscpp_serialization rospack roslib xmlrpcpp rosconsole std_msgs rosgraph_msgs roscpp std_srvs

alternative version: roscd roscpp_tutorials; vim manifest.xml roscpp, std_srvs, std_msgs

How do you run the talker and listener nodes in the roscpp_tutorials package? rosrun beginner_tutorials talker rosrun beginner_tutorials listener

What topic are the talker and listener nodes subscribing and publishing to? /chatter (talker publishing to and listener subscribing)

What is the message type of the topic in the previous question? std_msgs/String

How do you rename a node? __name:=

What is the difference between a topic and a service? A service let's you query a node and receive a reply for it, while a topic let's you broadcast messages (nodes can subscribe to the topic).

What does rxconsole show you? rxconsole displays the messages being published to rosout.

What does roslaunch do? Allow you to initialize multiple nodes on your machine.


Originally posted by jlo on ROS Answers with karma: 385 on 2011-10-07

Post score: 2

Original comments

Comment by jlo on 2011-10-09:
I would :-)

Comment by mmwise on 2011-10-07:
So far there are 219 responses to the questionnaire. I can anonymize the answers and make them public if that is something that people would like.

Comment by David Lu on 2011-10-07:
https://spreadsheets.google.com/viewform?formkey=dGJVOVhyXzd0b0YxRHAxWDdIZmo4cGc6MA but I don't know where its linked from.

Comment by Daniel Canelhas on 2011-10-07:
can you add a link to the questionnaire?

Comment by snakeninny on 2016-06-29:
@mmwise Can you provide us with a piece of "standard" answers?


1 Answer 1


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Here are the anonymous answers for ROS and TF tutorials:


Here are some other stats:

Preferred programming language

image description

python  57  26%
c++     148 67%
Other   17  8%

How well do you feel you understand ROS concepts after the tutorial?

image description

Not at all.
1       0      0%
2       0      0%
3       4      2%
4       3      1%
5       9      4%
6       37     17%
7       73     33%
8       43     19%
9       53     24%  
I have a good basic understanding.

Originally posted by mmwise with karma: 8372 on 2011-10-26

This answer was ACCEPTED on the original site

Post score: 3

Original comments

Comment by jlo on 2011-10-26:
Thanks, that's great!


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