M102 HOMEWORK 2.1

M102 HOMEWORK 2.1

The questions were all quite straightforward and covered in the online course material. Based on the explain output, which of the following statements below are true? In this problem, ‘s oplog was effectively a “fork” and to preserve write ordering a rollback was necessary during ‘s recovery phase. Open command prompt and start MongoDB server Download handout and save as performance. Posted by SiteAdmin at However, I didn’t have any problems related to the version.

Your email address will not be published. Once you have it right and are ready to move on, ctrl-c terminate the shell that is still running the homework. To find answer of second question, it is necessary to find number of documents scanned by above query. Now, what query would you run to get all the products where brand equals the string “ACME”? This will simply confirm all the above happened ok.

M102 WEEK 3

MongoDB has a data type for binary data. Based on the explain output, which of the following statements below are true? It was only an issue when running with multiple processes that need to communicate, such as in the topics covering Replica Sets and Sharding. This comes from how you start 2.11 Windows command line interface, cmd.

What result does this expression give when evaluated?

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Add two data bearing members plus one arbiter. None of the above. MongoDB allows you to choose the storage engine separately for each collection on your mongod. My first introduction to MongoDB was to sign up to university. Most MongoDB queries involve javascript execution on the database server s. I installed the latest version of MongodDB version 3.

m102 homework 2.1

How many products have a voice limit? The questions were all quite straightforward and covered in the online course material.

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homewwork Now, what query would you run to get all the products where brand equals the string “ACME”? Once you have eliminated the slow operation, run on your second tab:.

When you are done, run: Newer Post Older Post Home. Once done with that, run homework. Check all that apply:. Which of the following options will allow you to ensure that a primary is available during server maintenance, and that any writes it j102 will replicate during this time?

It contains 3 documents.

m102 homework 2.1

homewrk Execute following command to check if indexes are created. Once you have eliminated the slow operation, run on your second tab: This method will simply verify that this simple cluster is up and running and return a result homeaork. Next, go into the pcat database. One way to assure people vote at most once per posting is to use this form of update: Then when you start your MongoDB processes they will function correctly. Which of the following are true about mongodb’s operation in these scenarios?

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MongoDB is “multi-master” — you can write anywhere, anytime. Once you have it right and are ready to move on, ctrl-c terminate the shell that is still running the homework. Once you have two secondary servers, both of which have sync’d with the primary and are caught up, run on homewodk primary: Run the same query, but this time do an explain.

Once you have it right and are ready to move on, ctrl-c terminate the shell that is still running the homework. Start a mongod server instance if you still have a replica set, that would work too.

October 31, March 10, Sonali. Choose the best answer:.