Curious about Actual MongoDB Certified DBA Associate (C100DBA) Exam Questions?

You perform the following query on the sayings collection, which has the index

{ quote : "text" }:

Assuming the documents below are in the collection, which ones will the following query return? Check all that

apply.

db.sayings.find( { $text : { $search : "fact find" } } )

Which of the following is a valid Replica Set configuration if you want:

1-Have 3 copies of everything

2- That RS3 is never primary

2- That RSI and RS2 can be primary?

You had to see the different configurations, RS3 could be hidden or priority 0 (But not a referee because we need

3 replicas), while RSI and RS2 could NOT have priority 0 or be hidden or anything like that

In a 4-member RS RSO , RSI, RS2 and RS3 + Referee, RSO (primary) falls after some write operations that have

replicated RSI and RS2 (but NOT RS3), who can get up as the new primary?

The configuration comes and in it we see that RS2 has a hidden: true (or a priority: 0, (I don't remember)

Addding the index {a:l} can potentially decrease the speed of which of the following operations? Check all that apply.

Consider the following example document from the sample collection. All documents in this collection have the same schema.

Which of the following queries will replace this with the document.

Consider the following document:

> db.c.find()

{ "_id" : 12, b : [ 3, 5, 7, 2, 1, -4, 3, 12 ] }

Which of the following queries on the "c" collection will return only the first five elements of the array in the "b"

field? E.g.,

Document you want returned by your query:

{ "_id" : 12, "b" : [ 3, 5, 7, 2, 1 ] >