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Mongo DB Solution

Mongo DB Solution, Mongo DB exam solution which directs users to pass the exam and get good score

Final: Question 6 Solution M101JS: MongoDB for Node.js Developers

Final: Question 6 Suppose you have a collection of students of the following form: { "_id" : ObjectId("50c598f582094fb5f92efb96"), "first_name" : "John", "last_name" : "Doe", "date_of_admission" : ISODate("2010-02-21T05:00:00Z"), "residence_hall" : "Fairweather", "has_car" : true, "student_id" : "2348023902", "current_classes" : } Now suppose that...

Final: Question 4 Solution M101JS: MongoDB for Node.js Developers

Final: Question 4 Enhancing the Blog to support viewers liking certain comments In this problem, you will be enhancing the blog project to support users liking certain comments and the like counts showing...

Final: Question 3 Solution M101JS: MongoDB for Node.js Developers

Final: Question 3 In this problem you will update a document in the Enron dataset to illustrate your mastery of updating documents from the shell. Please add the email address "mrpotatohead@mongodb.com" to the...

Final: Question 2 Solution M101JS: MongoDB for Node.js Developers

Final: Question 2 Please use the Enron dataset you imported for the previous problem. For this question you will use the aggregation framework to figure out pairs of people that tend to...

Final: Question 1 M101JS: MongoDB for Node.js Developers

Final: Question 1 Please download the Enron email dataset enron.zip, unzip it and then restore it using mongorestore. It should restore to a collection called "messages" in a database called "enron". Note...

Solution to Homework 6.5 M101JS: MongoDB for Node.js Developers

Homework: Homework 6.5 In this homework you will build a small replica set on your own computer. We will check that it works with validate.js, which you should download from the Download...

Solution to Homework 6.4 M101JS: MongoDB for Node.js Developers

Homework: Homework 6.4 You have a sharded system with three shards and have sharded the collections "students" in the "school" database across those shards. The output of sh.status() when connected to mongos...

Solution to Homework 6.3 M101JS: MongoDB for Node.js Developers

Homework: Homework 6.3 Which of the following statements are true about choosing and using a shard key? MongoDB can not enforce unique indexes on a sharded collection other than the shard key itself,...

Solution to Homework 6.2 M101JS: MongoDB for Node.js Developers

Homework: Homework 6.2 Let's suppose you have a five member replica set and want to assure that writes are committed to the journal and are acknowledged by at least 3 nodes before...

Solution to Homework 6.1 M101JS: MongoDB for Node.js Developers

  Homework: Homework 6.1 Which of the following statements are true about replication in MongoDB? Check all that apply. The minimum sensible number of voting nodes to a replica set is three.MongoDB replication is...

Solution to Homework 5.4 M101JS: MongoDB for Node.js Developers

Solution to Homework 5.4 M101JS: MongoDB for Node.js Developers Homework: Homework 5.4 Removing Rural Residents In this problem you will calculate the number of people who live in a zip code in the US...

Solution to Homework 5.3 (Hands On) M101JS: MongoDB for Node.js Developers

Solution to Homework 5.3 (Hands On) M101JS: MongoDB for Node.js Developers Who's the easiest grader on campus? A set of grades are loaded into the grades collection.The documents look like this: { "_id" : ObjectId("50b59cd75bed76f46522c392"), "student_id"...

Solution to Homework 5.2 (Hands On) M101JS: MongoDB for Node.js Developers

Solution to Homework 5.2 (Hands On) M101JS: MongoDB for Node.js Developers Crunching the Zipcode dataset Please calculate the average population of cities in California (abbreviation CA) and New York (NY) (taken together) with...

Solution to Homework 5.1 (Hands On) M101JS: MongoDB for Node.js Developers

Homework: Homework 5.1 (Hands On) Finding the most frequent author of comments on your blog In this assignment you will use the aggregation framework to find the most frequent author of comments on...

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