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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: CRUD Operations and Indexing | 20% | - Query optimization and aggregation - Create, Read, Update, Delete operations - Index types, creation, and management |
| Topic 2: Sharding and Scalability | 10% | - Sharded cluster architecture - Query routing and cluster operations - Shard keys, chunk management, balancing |
| Topic 3: Monitoring, Performance and Troubleshooting | 10% | - Diagnostics and resolving common issues - Performance tuning and optimization - Monitoring tools and metrics |
| Topic 4: Replication and High Availability | 15% | - Failover, elections, read/write concern - Replica set architecture and components - Deployment and maintenance of replica sets |
| Topic 5: MongoDB Architecture and Deployment | 20% | - Installation and configuration - Storage engines and server management - Core concepts, JSON/BSON, data model |
| Topic 6: Backup, Recovery and Maintenance | 10% | - Logical and physical backup methods - Data consistency and integrity checks - Restore procedures and disaster recovery |
| Topic 7: Security and Access Control | 15% | - Authentication mechanisms - Encryption, auditing, and security best practices - Role-based access control |
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NEW QUESTION # 50
In a sharded replica set environment, the w Option provides ability for write concern and j Option provides ability for the data to be written on disk journal. Consider that we have a seven member replica set and we want to assure that the writes are committed to journal. What should be the value of j?
Answer: A
NEW QUESTION # 51
What command adds a document to the class101 collection where the student is " Randall " and the student passed the class?
Answer: D
Explanation:
db.collection.insertOne() inserts one BSON document into a collection. In mongosh, string values must be quoted and Boolean literals use JavaScript syntax: lowercase true or false. Therefore the student ' s name must appear as " Randall " , and the passed flag must be true. Option D is the only choice that gets both value types correct. Option A quotes the string properly but uses True, which is not the JavaScript Boolean literal.
Options B and C leave Randall unquoted, so mongosh would interpret it as an identifier or variable rather than as the literal string required by the document. Option C additionally uses the invalid capitalized Boolean form.
If an _id field is omitted, MongoDB automatically adds a unique _id, typically an ObjectId, before storing the document. That behavior does not affect the two requested fields. This question tests both CRUD syntax and the BSON/JavaScript literal representation used by mongosh. The correct command is db.class101.insertOne ({ student: " Randall " , passed: true }), so option D is correct.
Study Guide reference/topic:MongoDB Architecture and Core Operations - insertOne(), BSON values, strings, Booleans, and automatic _id.
NEW QUESTION # 52
Below is a sample document of " orders " collection
Answer:
Explanation:
$sort
NEW QUESTION # 53
In a collection that contains 100 post documents, what does the following command do? db. posts.
find().skip(5).limit(5)
Answer: B
NEW QUESTION # 54
What method should be used to configure dynamically runtime parameters for the mongod process in MongoDB?
Answer: C
Explanation:
MongoDB exposes server parameters that can be configured through the parameter framework. Among the choices, --setParameter is the option specifically designed to set a server parameter on the mongod command line, using syntax such as mongod --setParameter < name > = < value > . A configuration file can also contain a setParameter section, but --config by itself merely tells mongod which configuration file to load; it is not the parameter-setting mechanism identified by the question. Connection-string options control how clients connect and cannot be used to configure arbitrary server runtime parameters. Option D is also incorrect because the server must already be running for mongosh to issue administrative commands. A technical nuance is important: parameters that support modification while the process is already running are changed with the administrative setParameter command, for example db.adminCommand({setParameter:1, ...}). Such runtime changes may not persist across a restart unless the value is also configured for startup. Given the options provided and the exam wording, --setParameter is the intended method, so A is correct.
Study Guide reference/topic:MongoDB Architecture and Core Operations - server parameters, --setParameter, configuration files, and runtime administration.
NEW QUESTION # 55
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