M101J MONGODB FOR JAVA DEVELOPERS HOMEWORK ANSWERS WEEK 2

You must figure out the GPA that each student has achieved in a class and then average those numbers to get a class average. Crunching the Zipcode dataset Please calculate the average population of cities in California abbreviation CA and New York NY taken together with populations over 25, Blog User Sign-up and Login Download the handout and unpack it. A city might have multiple zip codes. For example, to extract the first character from the city field, you could write this pipeline:.

Use that data set to answer this question. First, let’s confirm your data is intact; the number of documents should be You should see three files at the highest level: Sunday, January 22, [Solution] Week 2: Try for your self. Those students achieved a class average of Please use the Aggregation pipeline to solve this problem.

For this problem, we have used a subset of the data you previously used in zips. Please round the answer to a whole number.

m101j mongodb for java developers homework answers week 2

If everything is working properly, aeek should be able to start the blog by typing: Check all that apply. You will need to probably change your projection to send more info through than just that first character.

M101J Mongodb For Java Developers Homework Answers Week 2

To help you verify your work before submitting, the author with the fewest comments is Mariela Sherer and m101jj commented times. Use that data set to answer this question.

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m101j mongodb for java developers homework answers week 2

You must figure out the GPA that each student has achieved in a class and then average those numbers to get a class average.

In this problem, you will be using a collection of student scores that is similar to what we used in the lessons. Who’s the easiest grader on campus?

For this set, there are only documents and zip codesand all of them are in New York, Weekk, New Jersey, and California. Your task is to calculate the class with the best average student performance.

m101j mongodb for java developers homework answers week 2

The correct result will be: You need to group twice to solve this problem. Some students have three homework assignments, decelopers.

The documents look like this: You should see three files at the highest level: There is also a views directory which contains the templates for the project. This involves calculating an average for each student in each class of all non-quiz assessments and then averaging those numbers to get a class average.

MongodbChamps: MJ: MongoDB for Java Developers – Homework

Prefered Cities to Live! A city might have multiple zip codes. First, let’s confirm your data is intact; the number of documents should be Please query the video.

We will be using a data set similar to ones we’ve used before. Using the aggregation framework, calculate the sum total of people who are living in a zip code where the city starts with one of those possible first characters. There is a dump of the video database included in the handouts for the “Creating Documents” lesson. In this assignment you will use the aggregation framework to find the most frequent wee, of comments on your blog At the end I just want to say if you want to learn mongoDB, First practice with youself.

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For this problem, assume that a city name that appears in more than one state represents two separate cities. Then import into your blog database as follows:. Posted by Unknown at Please use the Aggregation pipeline ajva solve this problem. You will be using the zip code collection data set, which you will find in the ‘handouts’ link m101 this page.

[Solution] Week 2 : CRUD: MP: MongoDB for Developers

Try for your self. Sunday, January 22, [Solution] Week 2: Import it into your homeowrk using the following command from the command line:. Now it’s your turn to analyze the data set.

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