Compare mongodb and couchdb at high level?
How many indexes does mongodb create by default for a new collection?
what is objecld composed of?
What is the difference between mongodb and mysql?
Compare mongodb and cassandra?
Does mongodb need a lot of ram?
how to do transactions/locking in mongodb?
Which all languages can be used with mongodb?
Explain replica set?
what is the role of profiler in mongodb?
If you remove a document from database, does mongodb remove it from disk?
Why 32 bit version of mongodb are not preferred ?
In mongodb how do you use $set to update a nested value?
Can you explain pdq priority?
Explain multi version concurrency control.