Selenium Cloud Computing & Services 4

Question 1

Which commercial cloud testing platform uses the concept of 'tunnels' to allow Selenium tests on their grid to access locally hosted applications?

Accepted Answer

BrowserStack / Sauce Labs (both use tunnels)

Answer

BrowserStack Local and Sauce Connect both establish an encrypted tunnel between the cloud grid and the user's private network or localhost.

Question 2

What is the purpose of 'tagging' cloud resources used by a Selenium test farm (e.g., AWS tags)?

Accepted Answer

Tagging enables cost allocation and resource tracking by project or team

Answer

Cloud provider tags attach metadata (project, owner, environment) to resources so billing and usage can be attributed to the correct team or workload.

Question 3

A Selenium test running in the cloud reports 'ERR_NAME_NOT_RESOLVED' for the application URL. What is the most likely cause?

Accepted Answer

The cloud node cannot resolve the application's DNS, likely a VPC or DNS misconfiguration

Answer

ERR_NAME_NOT_RESOLVED in a cloud browser means the node's DNS or network routing cannot reach the target hostname, often due to VPC or firewall settings.

Question 4

Which approach is recommended to minimize cloud costs when Selenium Grid nodes sit idle between CI pipeline runs?

Accepted Answer

Use spot/preemptible instances with auto-scaling that scales to zero when idle

Answer

Spot or preemptible instances are significantly cheaper, and scaling to zero during off-hours eliminates compute costs while tests are not running.

Question 5

In a multi-region cloud Selenium setup, why would you route test traffic to the cloud region geographically closest to the application server?

Accepted Answer

To reduce network latency and make tests more representative of real user conditions

Answer

Lower latency between the Selenium node and the AUT reduces network-induced flakiness and makes timing-sensitive tests more reliable.

(Selenium) Selenium Testing Certification Practice Test

(Selenium) Selenium Testing Certification Practice Test

Selenium Cloud Computing & Services 4