Hi, Badruduja.
If you fail a Microsoft certification exam, you must wait a certain amount of time before you can retake it. The amount of required waiting time is dependent on the number of exam attempts.
After the:
- First attempt - you can retake the exam after 24 hours.
- Second, Third, or Fourth attempt - you can retake the exam after 14 days.
- Fifth attempt - you must wait one (1) year from the date of the
Fifth attempt before you can retake the exam.
You can only attempt to pass a Microsoft certification exam five (5) times per year. This is why Microsoft's Booster Pack offer includes four (4) exam retakes.
To take a given exam more than five (5) times per year, a candidate must submit a request and obtain prior permission from Microsoft.
Note that once you pass any Microsoft certification exam, you can never retake it.
The exam retake policy is explained here:
https://www.microsoft.com/en-us/learning/certification-exam-policies.aspx#policies-1
Good luck!
Best wishes, Davin Mickelson