A new application is being deployed, and the DBA is responsible for ensuring the database is ready. The application team has provided a connection string that uses a specific port. The DBA has confirmed the database is listening on that port. However, the application is still unable to connect. What is the most likely cause?

A firewall is blocking the port between the application server and the database server.

The database schema is not validated.

The database is not under enough load.

The version control system is not up to date.

During schema validation, a database developer discovers that a column defined as VARCHAR(50) in the design document was implemented as VARCHAR(100). What is the most appropriate action?

Document the discrepancy and update the schema to match the design specification

Leave the schema as is because VARCHAR(100) is more flexible

Ignore the difference because it does not affect functionality

Change the design document to reflect VARCHAR(100)

An application is intermittently failing to connect to the database. The DBA has verified that the database service is running and the connection string is correct. The failures seem to occur more frequently during peak usage hours. What is the most likely cause of this issue?

The version control system is not tracking the latest schema changes.

The schema is not validated against the application's requirements.

The database is running out of available connections or resources during peak load, causing new connection attempts to fail.

The network firewall is permanently blocking the database port.

A database team is using a version control system to manage schema changes. They have a policy that every change must have a corresponding migration script. A developer has made a change to a stored procedure and wants to commit it. What should the developer do?

Create a migration script for the stored procedure change and commit it to version control.

Commit the change directly to the version control system without a migration script.

Apply the change directly to the production database and then commit the change.

Email the change to the DBA and ask them to apply it.

CompTIADataSys+

Domain 2Objective 2

Implementation and Testing DS0-001 Practice Questions (Page 2)

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 26 practice questions to prepare you well beyond it. (estimate)

26questions here

6free pages

4concepts

16%of the exam

Questions 6–10

6expert · hard
A new application is being deployed, and the DBA is responsible for ensuring the database is ready. The application team has provided a connection string that uses a specific port. The DBA has confirmed the database is listening on that port. However, the application is still unable to connect. What is the most likely cause?
Select an answer first
7foundation · easy
During schema validation, a database developer discovers that a column defined as VARCHAR(50) in the design document was implemented as VARCHAR(100). What is the most appropriate action?
Select an answer first
8expert · hard
An application is intermittently failing to connect to the database. The DBA has verified that the database service is running and the connection string is correct. The failures seem to occur more frequently during peak usage hours. What is the most likely cause of this issue?
Select an answer first
9application · medium
A database team is using a version control system to manage schema changes. They have a policy that every change must have a corresponding migration script. A developer has made a change to a stored procedure and wants to commit it. What should the developer do?
Select an answer first
10foundation · easy
Which command-line tool is commonly used to test connectivity to a database server?
Select an answer first

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Implementation and Testing DS0-001 Practice Questions (Page 2)

Questions 6–10

During schema validation, a database developer discovers that a column defined as VARCHAR(50) in the design document was implemented as VARCHAR(100). What is the most appropriate action?

An application is intermittently failing to connect to the database. The DBA has verified that the database service is running and the connection string is correct. The failures seem to occur more frequently during peak usage hours. What is the most likely cause of this issue?

A database team is using a version control system to manage schema changes. They have a policy that every change must have a corresponding migration script. A developer has made a change to a stored procedure and wants to commit it. What should the developer do?

Which command-line tool is commonly used to test connectivity to a database server?

Keep studying — Database deployment