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- [FREE] Mongodb M102 Final Exam Answers
The database consists of two collections, albums, and images. Every image is supposed to be in an album, but there are orphan images that appear in no album. Here are some example documents not from the collections you will be downloading. When you...
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Subscribe now Get the highlights in your inbox every week. Fortunately for me, 10gen—the company behind the wildly successful MongoDB database—started doing free training using the same delivery method. This included examples in Python,...
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M102: MongoDB For DBAs Final ExamThese courses run during seven weeks and each lesson consists of short-videos and quizzes with a final homework assignment that has to be finished before the end of the following week. At the end of the seventh week there is a final exam that counts half towards the final grade, being the six weekly assignments the other half. MongoDB invited in September some of their former students to do the pilot exams in a new testing platform, but I made it just to the waiting list. Surprisingly and with the examination period already started, one of the 50 spots was opened and I registered to take the exam. Problem was that I had less than three days to prepare the exam. Exam The exam was scheduled at am in Examity and after being introduced to my proctor a friendly Indian guy who watched me along the duration of the exam , verify my ID to check my name and my face, and show him my room and desktop to find cheat sheets; I had 90 minutes to complete it.
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If I recall properly there was 54 questions which are multiple choice, what adds certain complexity. Indexing and aggregation were easy to follow with some thinking. Data modelling was pretty straight forward. And although I was a bit scared before the test about Replication and Sharding; at the end they were the easiest probably because these tasks are more related to the database administrator than to the developer. I passed the exam with a score of when the minimum required was , what makes me estimate that I failed just six questions. Share this:.
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There are no prerequisites. Anyone may take the exam. We recommend completing M and familiarity with the other resources listed above. You may complete the exam at any time, day or night between the start and end dates. Test takers have 90 minutes to complete an exam. All questions are weighted equally. There is no penalty for incorrect answers. Exam scores are based on the number of correct answers with an adjustment made for the overall difficulty of the exam as determined by the data and expert assessment.
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- M102: MongoDB For DBAs Chapter 2 Crud_and_administrative_commands学习记录
Exam question types are multiple choice and check all that apply. Please perform a system check before taking the exam. The system check includes a brief example exam as the final step. Exam results will be available weeks following the close of the exam period. We need time to review any questions raised by the proctors and calculate exam results. Exam Rules To be certified upon passing an exam, test takers must observe the rules below. Video, audio, and computer screen activity will be captured during the exam session and reviewed by exam auditors. During the authentication process, test takers must provide the following when prompted: A clear photograph of their face A government-issued photo ID such as a drivers license or passport A video scan of the testing environment Test takers must be alone in a quiet environment for the duration of the exam.
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Conversation with anyone else is not permitted. No headphones, radios, televisions, or other computer screens may be used for the duration of the exam. Test takers are permitted to view only the exam. No reference materials, resources, or software other than the exam software may be used.
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The file exists but is 0 bytes long. Final: Question 4 Keep the three member replica set from the above problems running. The member should still be visible as a secondary. Reconfigure the replica set so that the third member can never be primary. Note: to get a multiple answer question right in this final you must get all the components right, so even if some parts are simple, take your time. One way to assure people vote at most once per posting is to use this form of update: db. MongoDB v2. MongoDB supports atomic operations on individual documents. MongoDB allows you to change the storage engine on a collection level.
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MongoDB has a data type for dates and datetime data. Final: Question 7 Which of these statements is true? Most MongoDB queries involve javascript execution on the database server s. Final: Question 8 We have been asked by our users to pull some data from a previous database backup of a sharded cluster. The next few questions involve this user request. First we will restore the backup. The original cluster that was backed up consisted of two shards, each of which was a three member replica set. We have one mongodump backup for each shard, plus one of one of the config databases.
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As a first step, restore the config server backup and run a mongod config server instance with that restored data. The backups were made with mongodump. Thus you will use the mongorestore utility to restore. Once you have the config server running, confirm the restore of the config server data by running the last javascript line below in the mongo shell, and entering the 5 character result it returns. Use mongorestore to restore the data for each shard. If we inspect our restored config db, we see this in db. However, for this problem, our job is not to restore the cluster, but rather to create a new temporary datamart initialized with this dataset. Thus instead we will update the config. Update the config.
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- Daily MongoDB Blog: MongoDB University Course M MongoDB For DBAs
After the update restart the config server itself for the same reason. Then next step is to start a mongos for the cluster. Connect to the mongos with a mongo shell. No shards are queried.
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These courses run during seven weeks and each lesson consists of short-videos and quizzes with a final homework assignment that has to be finished before the end of the following week. At the end of the seventh week there is a final exam that counts half towards the final grade, being the six weekly assignments the other half. MongoDB invited in September some of their former students to do the pilot exams in a new testing platform, but I made it just to the waiting list. Surprisingly and with the examination period already started, one of the 50 spots was opened and I registered to take the exam. Problem was that I had less than three days to prepare the exam. Exam The exam was scheduled at am in Examity and after being introduced to my proctor a friendly Indian guy who watched me along the duration of the exam , verify my ID to check my name and my face, and show him my room and desktop to find cheat sheets; I had 90 minutes to complete it.
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If I recall properly there was 54 questions which are multiple choice, what adds certain complexity. Indexing and aggregation were easy to follow with some thinking. Data modelling was pretty straight forward. And although I was a bit scared before the test about Replication and Sharding; at the end they were the easiest probably because these tasks are more related to the database administrator than to the developer.
https://youtube.com/watch?v=kJxpAELOiuA
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I passed the exam with a score of when the minimum required was , what makes me estimate that I failed just six questions. Share this:.
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- Data Science Padawan: Course: MP - MongoDB For Developers
To demonstrate that you have done this, what is the text in the "state" field for the arbiter when you run rs. You are concerned about robustness, however. Which of the following are options that will allow you to ensure that failover can occur if the first server goes down? Check all that apply. Increase the number of votes for the first replica set member from one to two. Increase the priority of the first server from one to two. Homework: Homework 5. He mentions that you can find information on them in the docs, but he hasn't used them in the shell during this course. Also, this does not involve semicolons, so don't put any into the text box. You probably want to test this on your machine, and then copy and paste the insert query in the box below. You only have two data centers available.
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Which arrangement s of servers will allow you to be stay up as in, still able to elect a primary in the event of a failure of either data center but not both at once? All 3 servers in data center 1. The data center with the primary goes down, and is expected to remain down for the foreseeable future. Your secondary is now the only copy of your data, and it is not accepting writes. You want to reconfigure your replica set config to exclude the primary, and allow your secondary to be elected, but you run into trouble.
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Find out the optional parameter that you'll need, and input it into the box below for your rs. Use "double quotes" around the key s in your document. Hint: You may want to use this documentation page to solve this problem.
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- Eclass: CDBA: MongoDB Certified DBA Associate Exam, MongoDB University
It just shows you can read and understand English well enough to pass or perhaps cheat your way to that perfect score. The email said the closed-book exam would have roughly multiple-choice questions with a time limit of two hours. During the exam there would be an audio and video recording to check for any form of cheating. Reading about this exam got me excited to experience it, but the bad news was that I would be taking a vacation for most of the week that was available for the exam.
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