最新的MongoDB C100DEV免費考試真題

問題1

Is MongoDB a NoSQL database?

A. No

B. Yes

正確答案: B

說明：（僅 Fast2test 成員可見）

問題2

Select all true statements regarding to schema validation in MongoDB.

A. Validation rules are on a per-collection basis.

B. MongoDB doesn't provide the capability to perform schema validation during updates and insertions.

C. We need to use db.createCollection() with the validator option to specify validation rules for a new collection.

正確答案: A,C

說明：（僅 Fast2test 成員可見）

問題3

Assign typical operational tasks to the Database Administrator.

A. write data

B. create index, create user

C. write data, read data

D. read data

正確答案: B

問題4

Select all true statements about setting up a replica set in MongoDB.

A. All nodes in a replica set must be running on the same port.

B. rs.initiate() should only be run on one node in the replica set.

C. When connecting to a replica set, the mongo shell will redirect to the connection to the primary node.

正確答案: B,C

說明：（僅 Fast2test 成員可見）

問題5

Select all default configurations for mongod.

A. The default port for mongod is 27017.

B. By default, mongod is only bound to localhost (or 127.0.0.1).

C. By default, mongod doesn't enforce authentication.

D. The default data directory for mongod is /data/db

正確答案: A,B,C,D

說明：（僅 Fast2test 成員可見）

問題6

Select true statements regarding to MongoDB. Check all that apply.

A. Documents in MongoDB are organized into collections.

B. MongoDB is a NoSQL database that uses documents to store data in an organized way.

C. MongoDB database organizes documents in rows and columns.

正確答案: A,B

說明：（僅 Fast2test 成員可見）

問題7

Select all true statements about indexes on a field with values of varying data types.

A. Values are ordered only by value.

B. Values are ordered by data type, then by value.

C. Values are ordered only by data type.

D. In MongoDB index cannot have different data types.

正確答案: B

說明：（僅 Fast2test 成員可見）

問題8

You have to create a simple configuration file for mongod instance. Here are the requirements of your mongod instance: * stores data files in /var/mongo/db * listens to connection from localhost * runs on port 27000 * uses authentication Which of the following configuration file meet these requirements?

A. storage:
dbPath: /var/mongodb/db
security:
authorization: enabled

B. net:
bindIp: localhost
port: 27000
security:
authorization: enabled

C. storage:
dbPath: /var/mongodb/db
net:
bindIp: localhost
port: 27000
security:
authorization: enabled

D. storage:
dbPath: /var/mongodb/db
net:
bindIp: localhost
port: 27000

正確答案: B

說明：（僅 Fast2test 成員可見）

問題9

Which of the following roles provides the same read-only privileges as read role on all databases except local and config?

A. readWriteAnyDatabase

B. userAdminAnyDatabase

C. readAnyDatabase

正確答案: C

說明：（僅 Fast2test 成員可見）

問題10

Select all true statements about differences between using aggregate() and find() methods?

A. Any aggregation pipeline can be translated into a find() query.

B. find() allows us to compute and reshape data in the cursor.

C. aggregate() allows us to compute and reshape data in the cursor (like $group, $min and other stages).

D. Any find() query can be translated into an aggregation pipeline.

正確答案: C,D

說明：（僅 Fast2test 成員可見）

問題11

You have the following index in a movies collection: { "title": 1, "imdb.rating": -1, "imdb.votes": -1, "type": 1 } Can the following query use the given index for both filtering and sorting?
db.movies.find( { "title": { "$lt": "M" } } ).sort( { "imdb.votes": -1 } )

A. No

B. Yes

正確答案: A

說明：（僅 Fast2test 成員可見）

問題12

Select true statements about sorting & indexing performance.

A. It's possible to have a sorted query use an index for both sorting and filtering.

B. Indexes can be traversed both forward and backward.

C. Index prefixes can be used in sort predicates to prevent sort in memory.

D. Index prefixes cannot be used in query predicates to increase index utilization.

正確答案: A,B,C

說明：（僅 Fast2test 成員可見）

問題13

Select all true statements regarding to transactions in MongoDB.

A. The collections used in a transaction can be in different databases.

B. Transactions are associated with a session.

C. We cannot read/write to collections in the config, admin, or local databases.

正確答案: A,B,C

說明：（僅 Fast2test 成員可見）

最新的MongoDB Certified Developer Associate - C100DEV免費考試真題

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