You need to get the names of all the indexes on your current collection. What is the best way to accomplish this?

June 25, 2021 Team Pa 0 Comment

MongoDB LinkedIn Assessment Questions and Answers

db.people.getName();
db.people.reIndex({names: 1});
db.people.getIndexKeys();
db.people.getIndexes();

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Which query bypasses the first 5 customers and returns the next 10?Which query bypasses the first 5 customers and returns the next 10?

db.customers.find({}, {skip: 5, limit: 10}) db.customers.find({}.page(5).take(10)) db.customers.find({}).skip(5).take(10) db.customers.find({}).skip(5).limit(10)[...]

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One of the documents in your collection has an _id based upon an older database design and you want to change it. You write an update command to find the document and replace the _id but the _id isn’t changed. How should you fix the issue?One of the documents in your collection has an _id based upon an older database design and you want to change it. You write an update command to find the document and replace the _id but the _id isn’t changed. How should you fix the issue?

Set the replace option to true. Use the replaceOne() command instead. You can’t. Once set, the _id field cannot be[...]

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In an MongoDB mapReduce command, the reduce function should .In an MongoDB mapReduce command, the reduce function should .

access the database be called only when the key has a single value access the database only to perform read[...]

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