Recent questions tagged Mongodb

0 votes

Q: Aggregation with $limit , $match , $ne returns more documents than expected

I have two collection vmdetails and rsc_installtion_status , i want to select the documents from rsc_installtion_status ... Interview, JavaScript MCQ (Multiple Choice Questions)...

asked Jun 2, 2022 in Education by JackTerrance

0 votes

Q: Use MongoDB ObjectID to Group By Date (ymd) and unique IP per day

Input: {_id:ObjectID(123),ip:'123.123.123.123'} {_id:ObjectID(123),ip:'123.123.123.123'} ... , JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...

asked May 7, 2022 in Education by JackTerrance

0 votes

Q: Can the $in operator return null for unmatched documents?

I have a requirement to return the same length of the array provided to mongo. usernames = ['user1' ... Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...

asked May 7, 2022 in Education by JackTerrance

0 votes

Q: Use MongoDB ObjectID to Group By Date (ymd) and unique IP per day

Input: {_id:ObjectID(123),ip:'123.123.123.123'} {_id:ObjectID(123),ip:'123.123.123.123'} ... , JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...

asked May 6, 2022 in Education by JackTerrance

0 votes

Q: Use MongoDB ObjectID to Group By Date (ymd) and unique IP per day

Input: {_id:ObjectID(123),ip:'123.123.123.123'} {_id:ObjectID(123),ip:'123.123.123.123'} ... , JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...

asked Apr 26, 2022 in Education by JackTerrance

0 votes

Q: Equivalent of mongo shell UUID() in java mongo driver

Following query is perfectly working in mongo shell. db.collection.find({ "_id" : UUID("87aa9ed6-8485-4517 ... Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...

asked Apr 21, 2022 in Education by JackTerrance

0 votes

Q: mongodb, replicates and error: { “$err” : “not master and slaveOk=false”, “code” : 13435 }

I tried mongo replica sets for the first time. I am using ubuntu on ec2 and I booted up three instances ... replicate across machines? Select the correct answer from above options...

asked Feb 1, 2022 in Education by JackTerrance

0 votes

Q: How to query MongoDB with “like”?

I want to query something with SQL's like query: SELECT * FROM users WHERE name LIKE '%m%' How to do I ... like in the documentation. Select the correct answer from above options...

asked Jan 26, 2022 in Education by JackTerrance