참고: Fast2test에서 Google Drive로 공유하는 무료 2026 MongoDB C100DBA 시험 문제집이 있습니다: https://drive.google.com/open?id=1s09t-MQkRKIItgMczdyzoli0m0h1d0tE
Fast2test의 덤프선택으로MongoDB C100DBA인증시험에 응시한다는 것 즉 성공과 멀지 않았습니다. 여러분의 성공을 빕니다.
| Section | Objectives |
|---|---|
| Topic 1: Sharding and Scalability | - Sharded cluster architecture - Balancing and scaling operations - Shard keys and distribution strategy |
| Topic 2: Aggregation Framework | - Aggregation operators - Data transformation and grouping - Aggregation pipeline stages |
| Topic 3: Indexing and Performance Tuning | - Query performance optimization - Index types and usage - Explain plans and diagnostics |
| Topic 4: Data Modeling | - Embedding vs referencing - Relationships in MongoDB - Schema design principles |
| Topic 5: Security | - Authentication and authorization - Role-based access control (RBAC) - Encryption at rest and in transit |
| Topic 6: Replication and High Availability | - Failover and elections - Replica set architecture - Read/write concerns |
| Topic 7: Backup, Restore, and Operations | - Backup strategies and tools - Monitoring and maintenance - Restore procedures |
| Topic 8: MongoDB CRUD Operations | - Insert, update, and delete operations - Querying and filtering documents - Working with documents and BSON types |
Fast2test의 덤프선택으로MongoDB C100DBA인증시험에 응시한다는 것 즉 성공과 멀지 않았습니다. 여러분의 성공을 빕니다.
질문 # 165
Which TWO commands can be used to check for all active operations on the current node?
정답：B,D
설명：
db.currentOp() is the mongosh helper used to inspect operations currently executing on a MongoDB server.
Passing true requests a broad view that includes all in-progress operations as well as additional idle/system entries, so it can be used when the administrator wants to see the complete current-operation picture. The database-command form, db.adminCommand({ currentOp: true }), invokes the corresponding administrative command and is also valid for obtaining in-progress operation information. Option A adds a filter restricting the result to operations whose op field is " command " ; it therefore does not represent all operation types.
Option B is not valid currentOp command syntax, and option E uses an all field that is not the documented special form for this helper. In modern MongoDB administration, the $currentOp aggregation stage is generally preferred for richer filtering and aggregation, but the question is testing the traditional helper and command interfaces. Therefore, C and D are the two valid choices among those presented.
Study Guide reference/topic:Performance Monitoring and Tuning - current operations, currentOp, and administrative diagnostics.
질문 # 166
In a replica set, a_________number of members ensures that the replica set is always able to select a primary.
정답：D
질문 # 167
A collection named products contains the following documents:
{ " _id " : 1, " name " : " Laptop " , " price " : 1500 }
{ " _id " : 2, " name " : " Smartphone " , " price " : 800 }
{ " _id " : 3, " name " : " Tablet " , " price " : 600 }
{ " _id " : 4, " name " : " Monitor " , " price " : 300 }
{ " _id " : 5, " name " : " Headphones " , " price " : 200 }
Given the following query:
db.products.find().sort({ " price " : -1 }).limit(2)
What is the expected output?
정답：B
설명：
The query first applies .sort({ price: -1 }). In MongoDB, -1 specifies descending order, so the result stream is ordered from the highest price to the lowest: Laptop at 1500, Smartphone at 800, Tablet at 600, Monitor at
300, and Headphones at 200. The subsequent .limit(2) restricts the cursor to the first two documents in that sorted sequence. Therefore, only Laptop and Smartphone are returned. Option B identifies the two lowest- priced products rather than the highest. Option C reflects the sort but ignores the limit(2) stage. Option D shows the two lowest products in ascending order and therefore contradicts both the requested sort direction and the limit semantics. For a large collection, a single-field index on price could support this sort efficiently because MongoDB can traverse an index in either direction; an ascending index can be scanned backward to satisfy a descending sort and vice versa. The logical query result, however, is independent of whether such an index exists. Option A is the correct output.
Study Guide reference/topic:MongoDB Architecture and Core Operations - cursor sorting, limiting result sets, and query result ordering.
질문 # 168
Which TWO commands can be used to remove the role, " specialRole " from " user1 " ?
정답：C,D
설명：
The documented mongosh helper is db.revokeRolesFromUser(), and its second argument is an array of roles to revoke. MongoDB permits each role in that array to be expressed either as an explicit document { role: < roleName > , db: < database > } or, when the role belongs to the database in which the command is run, as a simple role-name string. Option C uses the explicit role-document form and is therefore valid for a role named specialRole defined in myDB. Option E uses the shorthand string form and is valid when specialRole is in the current database context. Option A reverses the required document structure and does not supply the mandatory role and db keys. Options B and D use a singular helper, db.revokeRoleFromUser(), which is not the documented MongoDB method. The plural method name reflects that multiple roles can be revoked in a single operation. Administrators should also remember that revoking a directly assigned role does not necessarily remove privileges inherited through other roles. Among the choices, C and E are the syntactically valid revocation forms.
Study Guide reference/topic:Security, Networking, and Encryption - RBAC, user administration, and revokeRolesFromUser().
질문 # 169
In a sharded replicas set environment with multiple mongos servers, which of the following would decide the mongos failover?
정답：D
질문 # 170
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Fast2test의MongoDB C100DBA시험자료의 문제와 답이 실제시험의 문제와 답과 아주 비슷합니다. 우리의 짧은 학습가이드로 빠른 시일 내에 관련지식을 터득하여 응시준비를 하게 합니다. 우리는 우리의MongoDB C100DBA인증시험덤프로 시험패스를 보장합니다.
C100DBA퍼펙트 최신 덤프: https://kr.fast2test.com/C100DBA-premium-file.html
참고: Fast2test에서 Google Drive로 공유하는 무료 2026 MongoDB C100DBA 시험 문제집이 있습니다: https://drive.google.com/open?id=1s09t-MQkRKIItgMczdyzoli0m0h1d0tE