[amp_mcq option1=”rostopic bw” option2=”rostopic delay” option3=”rostopic echo” option4=”rostopic hz” correct=”option1″]<\/p>\n
The correct answer is: rostopic echo<\/strong>.<\/p>\n rostopic echo<\/strong> is a command-line tool that can be used to display messages published to a topic. It takes the name of the topic as an argument and prints out all of the messages that have been published to that topic since the last time the tool was run.<\/p>\n For example, to display all of the messages that have been published to the topic This would print out all of the messages that have been published to the topic, one per line.<\/p>\n The output of [amp_mcq option1=”rostopic bw” option2=”rostopic delay” option3=”rostopic echo” option4=”rostopic hz” correct=”option1″]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[730],"tags":[],"class_list":["post-44777","post","type-post","status-publish","format-standard","hentry","category-internet-of-things-iot","no-featured-image-padding"],"yoast_head":"\n\n
\/chatter<\/code>, you would run the following command:<\/p>\nrostopic echo \/chatter<\/code><\/p>\nrostopic echo<\/code> can be useful for debugging applications that are publishing messages to topics. It can also be used to monitor the activity of a topic, such as the number of messages that are being published per second.<\/p>\n","protected":false},"excerpt":{"rendered":"