When you work with MongoDB and if your queries is taking time to run and return resultset, then need to check execution query plan of your query, which will help you know, execution time of query, does query used colscan or indexscan, does any index used with query run etc.
NoSQL Workbench for AWS DynamoDB provide visual editor tool to create, view DB model/table. Insert record, run queries. Generally to achieve this we need AWS console access and then we can do all these things from there but think for developer who do not have access to AWS console, in that case either they can use AWS SDK to run API's and play with DynamoDB but that is not providing you UI. So in that we developer can prefer NoSQL Workbench which they can download and install on his machine and
Launch ec2 instance, download putty convert .pem file(which is your private key file provided by ec2 at last stage of ec2 launch to connect with instance) to .ppk file(Putty support to connect with instance) via Putty generator and with Putty connect to your Linux instance by using generated .ppk file and then install mongo db and work with mongo db.
