Q: 1
What does the following aggregate query perform?
Options
Discussion
No comments yet. Be the first to comment.
Be respectful. No spam.
Free C100DBA Practice Test Questions and Answers (2026) | Cert Empire Practice Questions
Free preview: 20 questions.
MongoDB C100DBA
Q: 2
You are in a sharded cluster. What will you do prior to initiating backup in sharded cluster?
Options
Discussion
No comments yet. Be the first to comment.
Be respectful. No spam.
Q: 3
Using an arbiter allows one to easily ensure an odd number of voters in replica sets. Why is this
important?
Options
Discussion
No comments yet. Be the first to comment.
Be respectful. No spam.
Q: 4
You have a replicated cluster with 1 primary, 3 secondary, 1 arbiter. One of the secondary is hidden.
What is the replication factor of this replicated cluster?
Options
Discussion
No comments yet. Be the first to comment.
Be respectful. No spam.
Q: 5
Which of the following operator can be used to control the number of items of an array that a query
returns?
Options
Discussion
No comments yet. Be the first to comment.
Be respectful. No spam.
Q: 6
What is the on-premise solution having functionality equivalent to cloud manager?
Options
Discussion
No comments yet. Be the first to comment.
Be respectful. No spam.
Q: 7
Which of the following does MongoDB use to provide High Availability and fault tolerance?
Options
Discussion
No comments yet. Be the first to comment.
Be respectful. No spam.
Q: 8
Which of the following commands finds all the documents in the posts collection with post
timestamp field as null?
Options
Discussion
No comments yet. Be the first to comment.
Be respectful. No spam.
Q: 9
Consider that you have a collection called population which has fields state and city. Which of the
following query will calculate the population grouped by state and city?
Options
Discussion
No comments yet. Be the first to comment.
Be respectful. No spam.
Q: 10
MongoDB is a schema-less design.
Options
Discussion
No comments yet. Be the first to comment.
Be respectful. No spam.
Q: 11
What tool would you use if you want to save a gif file in mongo?
Your Answer
Discussion
No comments yet. Be the first to comment.
Be respectful. No spam.
Q: 12
Write the command(s) are correct to enable sharding on a database "testdb" and shard a collection "testCollection" with _id as shard key. 
Your Answer
Discussion
No comments yet. Be the first to comment.
Be respectful. No spam.
Q: 13
What tool do you use if you want to extract a CSV from mongo?
Your Answer
Discussion
No comments yet. Be the first to comment.
Be respectful. No spam.
Q: 14
What tool do you use to see if you have a problem in the consumption of disk I / 0?
Your Answer
Discussion
No comments yet. Be the first to comment.
Be respectful. No spam.
Q: 15
Which mongodb tools allow us to work with our data in a human readable format?
Options
Discussion
No comments yet. Be the first to comment.
Be respectful. No spam.
Q: 16
The________operator can be used to identify an element in the array to be updated without
explicitly specifying
the position of the element.
Options
Discussion
No comments yet. Be the first to comment.
Be respectful. No spam.
Q: 17
Which of the following is correct about MongoDB?
Options
Discussion
No comments yet. Be the first to comment.
Be respectful. No spam.
Q: 18
Which of the following is incorrect statement about find and findOne operations in MongoDB?
Options
Discussion
No comments yet. Be the first to comment.
Be respectful. No spam.
Q: 19
What is the replication factor for a replicated cluster with 1 primary, 3 secondaries with one of them
hidden. The set also has an arbiter?
Options
Discussion
No comments yet. Be the first to comment.
Be respectful. No spam.
Q: 20
What does the following query do when performed on the posts collection?
db.posts.update({_id:l},{Title:This is post with ID 1"})
Options
Discussion
No comments yet. Be the first to comment.
Be respectful. No spam.
Question 1 of 20
