MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4) - C100DBA FREE EXAM DUMPS QUESTIONS & ANSWERS]

Question 1

You perform the following operation in the shell: db.foo.insert( { } ); What gets inserted?

A. No document will be inserted; an error will be raised B. A document that matches the collection's existing schema, but with null fields C. A document with an _id assigned to be an Objectld D. An empty document E. A document will be inserted with the same _id as the last document inserted

Discussion 0

Correct Answer: C Vote an answer

Question 2

In a sharded replica set environment, the w Option provides ability for write concern and j Option provides ability for the data to be written on disk journal. Consider that we have a seven member replica set and we want to assure that the writes are committed to journal. What should be the value of j?

A. 7 B. 2 C. 1 D. 0

Discussion 0

Correct Answer: C Vote an answer

Question 3

Which is the correct order (lowest to highest) in which MongoDB compares the BSON types?

A. Number, Null, String and Object B. Null, Number, String and Object C. String, Null, Number and Object D. Null, Number, Object and String

Discussion 0

Correct Answer: B Vote an answer

Question 4

You are comparing values of different BSON types in mongodb. You want to compare from lowest to highest. Which comparison order is used?

A. Object/Array^inData/Symbol,MinKey, Null, Numbers,String B. MinKey, Null, Numbers,Symbol, String,Object,Array,BinData C. MinKey, Null, Numbers,Object,Array,BinData,Symbol, String D. Objec^Array^inData,Symbol, String,MinKey, Null, Numbers

Discussion 0

Correct Answer: B Vote an answer

Question 5

Which of the following is true about sharding?

A. Sharding is enabled at the database level B. Creating a sharded key automatically creates an index on the collection using that key C. A sharded environment does not support sorting functionality since the documents lie on various mongod instances D. We cannot change a shard key directly/automatically once it is set up

Discussion 0

Correct Answer: D Vote an answer

Question 6

If you have created a compound index on (A,B, C) which of the following access pattern will not be able to utilize the index?

A. B, C B. A, B, C C. A D. A, B

Discussion 0

Correct Answer: A Vote an answer

Question 7

Below is a sample document of "orders" collection

A. $project

Discussion 0

Correct Answer: A Vote an answer

Question 8

Which of the following commands can cause the database to be locked?

A. All of the above B. Map-reduce C. Inserting data D. Issuing a query

Discussion 0

Correct Answer: A Vote an answer