After completing the exam, Cloudera will send a mail with a scorecard with pass/ fail status in less than an hour. Mostly it goes into your spam/junk files. So keep an eye on the spam folder. On clearing the exam, Cloudera sends the certificate along with the Licence Number to your registered email in 2–3 US business days. If you clear the exam, you cannot retake to improve your score as per the Cloudera policy. If you fail in the exam, you must wait for 30 days to give another attempt.
If you are preparing for the CCA 175 Certification exam, I recommend this Hadoop Certification Program by Intellipaat.
Also, watch this video on CCA175 Certification: