Can anybody answer my question I have received a mail stating that I have to complete the maintenance exam for salesforce with link to Trailhead. I have completed the Platform Developer I Certification Maintenance (Summer '18) quiz in trailhead. Is that the only exam I have to appear for to maintain the certificate? How can I check the status that I have completed the exam?
Go to Trailhead Verification link and select Certification Holders: Check Your status by entering your email and then Request. Complete the captcha and you will get an email listing your all certifications and their status. This will have a subject of 'Your credential status' as below.
It takes some time for the updates to show, as I found that I didn't see the exam completion till the next day.
I definitely agree with the other answers posted that going to the Trailhead verification link and submitting your email will verify your status. Something to be mindful of is that you need to make sure your Trailhead and Webassessor accounts are linked. You can verify this from the same email and there is more information here regarding the actual status verification email.
Nonetheless, after doing exactly this, I found that even after doing the maintenance quiz on Trailhead, and verifying my accounts were linked, my status still did not update. I was only able to solve the problem by submitting a support request stating that I had verified that my accounts were linked and that I have completed the maintenance trail but was not seeing this reflected in my status verification. Trailhead support were then able to fix this on their end.
If you have completed Platform Developer I Certification Maintenance (Summer '18) module you can check your certification status using Verify Credentials. Provide your trailhead email id and request. Status will be send to your mail id.