#Q1. Title - List of 20 popular commands of docker
  Ans : 
  1. docker version
  2. docker info
  3. docker help
  4. docker images
  5. docker ps
  6. docker ps -a
  7. docker create --name name1 httpd
  8. docker start abc
  9. docker stop abc
  10. docker restart abc
  10. docker pause abc
  11. docker unpause abc
  12. docker kill abc
  13. docker rm abc 
  14. docker run -d httpd
  15. docker pull httpd
  16. docker exec
  17. docker login
  18. docker image ls
  19. docker exec -it [id]
  20. docker exec  [id] touch /opt/abc.txt
  21. docker attach [id]
  22. docker inspect [id]

#Q2. Title - How to configure SMTP server in Sonarqube?
 1. go to SonarQube dashboard
 2. Click on the "Administration" tab.
 3. Browse to the “Configuration”
 4. Go to “General settings”
 5. Under General Setting Go to “General” menu.
 6. In General Menu Under the “Email” section, fill out  uname, pwd, port, host.
#Q3. Title - List of most popular plugins of Jenkins from plugins.jenkins.io/

 1. Jira
 2. Git 
 3. Build Pipeline Plugin
 4. Maven
 5. AWS CodeDeploy
 6. Junit
 7. Gradle
 8. Jdk