[Q50-Q69] Certification Training for C100DBA Exam Dumps Test Engine [2022]

Q50. Which of the following operator can be used to limit the number of documents in an array field of a document after an update is performed?

Q51. To add a new user and enable authentication in MongoDB, which of the following steps need be executed?

Q52. You have designed a web application with mongoDB. You have configured replication. The replica set is in place and function properly. What happens in case of failure?

Q53. In order to ensure that you can maintain high availability in the face of server failure, you should implement which of the following?

Q54. Consider a collection posts which has fields: Jd, post_text, post_author, post_timestamp, post_tags etc. Which of the following query retrieves ONLY the key named post_text from the first document retrieved?

Q55. Which of the following needs to be performed prior to initiate backup on a sharded cluster?

Q56. Consider the following posts document:

Which of the following queries will return the documents but with only the first two tags in the tags array?

Q57. MongoDB is a schema-less design.

Q58. Which of the following does MongoDB use to provide High Scalability?

Q59. Below is a sample document in a given collection test.
{ a : 5, b : 3, c: 2, d : 1 >
Given a compound index { a: 1, b:l, c:l, d:l}, Which of the below query will not use in-memory sorting? Select all valid.

Q60. You are comparing values of different BSON types in mongodb. You want to compare from lowest to highest.
Which comparison order is used?

Q61. JSON stands for

Q62. Given a replica set with five data-bearing members, suppose the primary goes down with operations in its oplog that have been copied from the primary to only one secondary. Assuming no other problems occur, which of the following describes what is most likely to happen?

Q63. Which of the documents below will be retrieved by the following query? Assume the documents are stored in a collection called “sample”. Check all that apply.
db.sample.find( { “$or” : [ { “a” : { “$in” : [ 3, 10] > }, { “b” : { “$lt” : 2 > > ] > )

Q64. Which option should be used to update all the documents with the specified condition in the MongoDB query?

Q65. What is the output of the following program?

Q66. Which of the following is supported by MongoDB?

Q67. 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?

Q68. Which option can be used with update command so that a new document gets created if no matching document is found based on the query condition?

Q69. What tool would you use if you want to save a gif file in mongo?