A small business is installing Oracle Database on a Linux server. The installation requires a specific set of kernel parameters and system libraries. The DBA has already created the necessary operating system user and groups. What is the next critical step before running the Oracle installer?

Create the database using the Database Configuration Assistant (DBCA).

Set the required kernel parameters and install the required RPM packages.

Start the Oracle listener service to verify network connectivity.

Set the ORACLE_SID environment variable to the desired database name.

A DBA has configured a MySQL replication topology with one primary and two replicas to handle increased read traffic. After setting up the replicas, the DBA wants to validate that the read scaling is effective. Which action should the DBA take?

Check the replication lag on each replica.

Ensure that the primary server has enough memory to handle all queries.

Verify that the replicas are in sync by comparing checksums of the data.

Route read queries to the replicas and monitor their load and query response times.

A DBA is provisioning a new MongoDB sharded cluster for a large IoT application that will ingest millions of records per day. The cluster will have three shards. The DBA needs to ensure that data is distributed evenly across the shards. Which provisioning step is essential?

Create an index on the _id field for each shard.

Choose an appropriate shard key and enable sharding on the collection.

Set the write concern to majority for all write operations.

Configure the cluster to use the WiredTiger storage engine.

What is the primary purpose of scalability validation for a database?

To verify that the database can handle increased workloads without performance degradation

To ensure the database is free of security vulnerabilities

To check that the database schema matches the application's data model

To confirm that all database backups are restorable

A DBA has just deployed a new MongoDB cluster for a web application that is expected to grow rapidly. Before going live, the DBA wants to verify that the cluster can handle an increase in read traffic. Which test is most appropriate for scalability validation?

Check the MongoDB logs for any errors during the initial data load.

Verify that all nodes in the cluster have the same version of MongoDB.

Review the hardware specifications of the servers to ensure they meet the minimum requirements.

Run a load test that simulates increasing concurrent read requests while monitoring response times and throughput.

CompTIADataSys+

Domain 2Objective 3

Deployment Phases DS0-001 Practice Questions (Page 4)

Part of the Database deployment domain, which accounts for 16% of the DS0-001 exam. CompTIA does not publish an official question count, but from its 90-minute exam (~35–60 total, ~6–10 in this domain), expect 2–3 from this objective — we provide 24 practice questions to prepare you well beyond it. (estimate)

24questions here

5free pages

4concepts

16%of the exam

Questions 16–20

16application · medium
A small business is installing Oracle Database on a Linux server. The installation requires a specific set of kernel parameters and system libraries. The DBA has already created the necessary operating system user and groups. What is the next critical step before running the Oracle installer?
Select an answer first
17application · medium
A DBA has configured a MySQL replication topology with one primary and two replicas to handle increased read traffic. After setting up the replicas, the DBA wants to validate that the read scaling is effective. Which action should the DBA take?
Select an answer first
18application · medium
A DBA is provisioning a new MongoDB sharded cluster for a large IoT application that will ingest millions of records per day. The cluster will have three shards. The DBA needs to ensure that data is distributed evenly across the shards. Which provisioning step is essential?
Select an answer first
19foundation · easy
What is the primary purpose of scalability validation for a database?
Select an answer first
20application · medium
A DBA has just deployed a new MongoDB cluster for a web application that is expected to grow rapidly. Before going live, the DBA wants to verify that the cluster can handle an increase in read traffic. Which test is most appropriate for scalability validation?
Select an answer first

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