Hi @Prem_kumar_Madheswaran and welcome to the community forum.
Since, MongoDB Atlas is a fully-managed cloud developer platform, that handles all the complexity of deploying, managing, and healing your deployments on the cloud service provider of your choice (AWS , Azure, and GCP).
This lets you avoid the operations to manage the infrastructure and provides a ready to use deployment.
If you wish to manage a deployment of your own, you can trying using MongoDB locally in your system and deploy and perform the above operations locally.
I hope this answers your questions. Please do not hesitate to reach out for any further assistance.
Regards
Aasawari