Practice Examples and Dumps & Tips for 2026 Latest DS0-001 Valid Tests Dumps [Q13-Q34]

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Practice Examples and Dumps & Tips for 2026 Latest DS0-001 Valid Tests Dumps

Latest [Sep 16, 2026] 100% Passing Guarantee – Brilliant DS0-001 Exam Questions PDF

CompTIA DS0-001 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Database Fundamentals	24%	– Database structure types and characteristics – Impact of programming on database operations – Scripting methods and environments – SQL development, modification, and execution
Topic 2: Business Continuity	12%	– Backup and restoration methods – Disaster recovery planning and strategies – RTO and RPO definitions and application – High availability and fault tolerance
Topic 3: Database Deployment	16%	– Implementation, testing, and deployment phases – Database planning and design considerations – Migration and integration strategies
Topic 4: Database Management and Maintenance	25%	– Performance monitoring and reporting – Documentation and configuration management – Routine maintenance processes and tasks – Data lifecycle management
Topic 5: Data and Database Security	23%	– Infrastructure security and threat mitigation – Governance, risk, and compliance – Data security concepts and techniques – Authentication, authorization, and access control – Attack types and defense measures

QUESTION 13
A company wants to deploy a new application that will distribute the workload to five different database instances. The database administrator needs to ensure that, for each copy of the database, users are able to read and write data that will be synchronized across all of the instances.
Which of the following should the administrator use to achieve this objective?

[Peer-to-peer replication

Failover clustering

Log shipping

Availability groups

QUESTION 14
An account manager, who had employee ID number 0012, resigned from an organization. The account manager’s view privileges need to be removed from the customer table. Which of the following commands would be the best option for the organization’s database administrator to use to accomplish this task?
REVOKE SELECT

ON tblCustomer
FROM ‘0012’
REVOKE DELETE

ON tblCustomer
FROM ‘0012’
REVOKE UPDATE

ON tblCustomer
FROM ‘0012’
UPDATE TABLE tblCustomer

DROP SELECT
FROM ‘0012’

QUESTION 15
(A developer needs to integrate a trigger to execute an action in a database. Which of the following SQL snippets is a correct use of a trigger?)

CREATE TRIGGER trigger_test
BEFORE ALTER
ON flights
FOR EACH ROW
SET add_ons = 0;

CREATE TRIGGER trigger_test
DURING UPDATE
ON flights
FOR EACH ROW
SET flight_status = ‘booked’;

CREATE TRIGGER trigger_test
AFTER DROP
ON flights
FOR EACH ROW
SET add_ons = 0;

CREATE TRIGGER trigger_test
BEFORE UPDATE
ON flights
FOR EACH ROW
SET flight_count = flight_count_prev + 1;

QUESTION 16
(A database manager would like to reduce the overhead caused by log-based recoveries. Which of the following should the manager use to best mitigate the situation?)

Deadlocks

Checkpoints

Locks

Indexes

The correct answer is B. Checkpoints. CompTIA DataSys+ explains that checkpoints play a critical role in database recovery mechanisms by limiting the amount of transaction log data that must be processed during recovery. Log-based recovery relies on transaction logs to restore the database to a consistent state after a failure. If checkpoints are infrequent, the database engine must replay a large portion of the transaction log, which increases recovery time and system overhead.
A checkpoint is a process where the database writes all modified (dirty) pages from memory to disk and records a synchronization point in the transaction log. After a checkpoint completes, the database knows that all changes up to that point are safely stored on disk. During recovery, the system only needs to process log entries that occurred after the most recent checkpoint, significantly reducing recovery workload and time.
DataSys+ highlights checkpoints as a key performance and availability feature, especially in systems with high transaction volumes.
Option A, deadlocks, are concurrency issues that occur when two or more transactions block each other indefinitely. While deadlock handling is important for transaction throughput, it does not reduce log-based recovery overhead. Option C, locks, control concurrent access to data and help maintain consistency, but they do not affect how much log data must be replayed during recovery. Option D, indexes, improve query performance but can actually increase logging activity because index changes are also logged.
CompTIA DataSys+ emphasizes that effective recovery planning includes optimizing logging behavior and checkpoint frequency. Properly configured checkpoints strike a balance between runtime performance and recovery efficiency by reducing excessive log replay without causing unnecessary disk I/O.
Therefore, to best mitigate the overhead caused by log-based recoveries, the database manager should use checkpoints, making option B the correct and fully verified answer.

QUESTION 17
A new retail store employee needs to be able to authenticate to a database. Which of the following commands should a database administrator use for this task?

ALLOW USER

ALTER USER

CREATE USER

INSERT USER

QUESTION 18
(A healthcare company relies on contact forms and surveys on its website to properly communicate with patients. To which of the following attacks is the company’s data most vulnerable?)

DoS

Ransomware

SQL injection

Brute-force

The correct answer is C. SQL injection. According to CompTIA DataSys+ objectives, web-based input mechanisms such as contact forms and online surveys represent a significant attack surface for databases if they are not properly secured. These forms commonly accept user-supplied input that is later processed by backend database queries. If input validation and parameterized queries are not correctly implemented, attackers can exploit this by injecting malicious SQL code into form fields.
SQL injection attacks allow an attacker to manipulate database queries executed by the application. This can result in unauthorized access to sensitive data, data modification, data deletion, or even full database compromise. In a healthcare environment, this risk is especially critical because patient data is highly sensitive and often protected by regulatory requirements. DataSys+ highlights SQL injection as one of the most common and dangerous database-focused attacks due to its direct impact on data confidentiality, integrity, and availability.
Option A, Denial of Service (DoS), primarily affects system availability by overwhelming resources, but it does not directly target data stored within the database. Option B, ransomware, typically requires malware execution on servers or endpoints and is not specifically tied to web form input mechanisms. Option D, brute- force attacks, focus on repeatedly guessing authentication credentials and are more closely associated with login systems rather than data entry forms or surveys.
CompTIA DataSys+ materials emphasize that databases connected to web applications must use strong input validation, stored procedures, prepared statements, and least-privilege database accounts to mitigate SQL injection risks. Because contact forms and surveys directly interact with database queries and rely on untrusted user input, SQL injection represents the most direct and realistic threat in this scenario.
Therefore, SQL injection is the attack type to which the company’s data is most vulnerable, making option C the verified and correct answer.

QUESTION 19
Which of the following concepts applies to situations that require court files to be scanned for permanent reference and original documents be stored for ten years before they can be discarded?

Data loss prevention

Data retention policies

Data classification

Global regulations

QUESTION 20
A database administrator needs to aggregate data from multiple tables in a way that does not impact the original tables, and then provide this information to a department. Which of the following is the best way for the administrator to accomplish this task?

Create a materialized view.

Create indexes on those tables.

Create a new database.

Create a function.

QUESTION 21
Which of the following is part of logical database infrastructure security?

Surveillance

Biometric access

Perimeter network

Cooling system

QUESTION 22
Which of the following ORM tools enables developers to work with a database using .NET objects?

Ebean

Entity Framework

Eclipse

Hibernate

QUESTION 23
(A database administrator wants to create a database that does not have a predefined schema. Which of the following tools should the administrator use to create this type of database? Select two.)

PostgreSQL

MariaDB

MySQL

SQL Server

MongoDB

Cosmos

The correct answers are E. MongoDB and F. Cosmos. CompTIA DataSys+ clearly differentiates between relational databases, which require predefined schemas, and non-relational (NoSQL) databases, which support flexible or schema-less data models. A schema-less database allows data to be stored without enforcing a fixed table structure, making it ideal for rapidly changing data requirements, unstructured data, or applications with evolving schemas.
MongoDB is a document-oriented NoSQL database that stores data in flexible, JSON-like documents. Each document in a MongoDB collection can have a different structure, allowing developers to add or remove fields without modifying a predefined schema. DataSys+ highlights document stores like MongoDB as well- suited for modern applications that require agility, scalability, and the ability to handle semi-structured or unstructured data.
Cosmos (commonly referring to Azure Cosmos DB) is a globally distributed NoSQL database service that supports multiple data models, including core (SQL) API, MongoDB API, and other non-relational models. It is designed for high availability, horizontal scalability, and schema flexibility. DataSys+ includes cloud-based NoSQL platforms such as Cosmos as examples of databases that do not enforce rigid schemas.
Options A, B, C, and D-PostgreSQL, MariaDB, MySQL, and SQL Server-are all relational database management systems (RDBMS). These systems require predefined schemas with fixed table definitions, column data types, and constraints before data can be stored. While some relational systems support limited JSON storage, they are still fundamentally schema-based and do not meet the requirement described in the question.
CompTIA DataSys+ emphasizes selecting database technologies based on data structure and application needs. When schema flexibility is required, NoSQL solutions are preferred. Therefore, the tools best suited for creating a database without a predefined schema are MongoDB and Cosmos, making options E and F the correct and fully verified answers.

QUESTION 24
Which of the following is an advantage of creating indexes?

To help with space allocation

To provide quick and efficient access to data

To reduce memory

To update the query plan

QUESTION 25
Which of the following scripts would set the database recovery model for sys.database?

QUESTION 26
An on-premises application server connects to a database in the cloud. Which of the following must be considered to ensure data integrity during transmission?

Bandwidth

Encryption

Redundancy

Masking

QUESTION 27
Which of the following is an attack in which an attacker hopes to profit from locking the database software?

Spear phishing

Ransomware

SQL injection

On-path

QUESTION 28
Which of the following is a characteristic of all non-relational databases?

Columns with the same data type

Unstructured data

Logical record groupings

Tabular schema

QUESTION 29
Which of the following does a database administrator need to know before planning the setup of a new server for a client?

The performance of the server

The size and importance of the server

The connectivity status of the server

The transaction logs for the server

QUESTION 30
(Which of the following is a characteristic of a multizone region in a disaster recovery policy?)

Three or more availability zones

A single geographic location

Application high availability

Active/active deployment on secondary zones

The correct answer is C. Application high availability. CompTIA DataSys+ describes a multizone region as an architecture that deploys systems across multiple availability zones within the same geographic region to improve availability, fault tolerance, and resilience. Availability zones are physically separate data centers with independent power, cooling, and networking, but they are connected through low-latency links.
A key characteristic of a multizone disaster recovery (DR) design is high availability of applications. By distributing application components and databases across multiple zones, the system can continue operating even if one zone experiences a failure. DataSys+ emphasizes that multizone architectures are primarily designed to protect against localized infrastructure failures, such as power outages or hardware issues within a single zone, while maintaining service continuity.
Option A, three or more availability zones, is incorrect because a multizone region does not require a specific number of zones. Most implementations use two or more zones, and the exact count depends on the cloud provider and design requirements. Option B, a single geographic location, is misleading; while availability zones are within the same broader region, they are still separate physical locations and not a single data center. Option D, active/active deployment on secondary zones, more accurately describes a multi-region or advanced global DR strategy, not a basic multizone regional design. Secondary zones imply geographically separate regions used for regional disaster recovery.
CompTIA DataSys+ clearly distinguishes high availability from disaster recovery. Multizone deployments primarily focus on availability and fault tolerance within a region, while multi-region strategies address large- scale regional outages. In a multizone DR policy, applications are architected to remain available despite zone- level failures.
Therefore, the defining characteristic of a multizone region in a disaster recovery policy is application high availability, making option C the correct and fully verified answer.

QUESTION 31
Which of the following resources is the best way to lock rows in SQL Server?

TID

SID

RID

PID

QUESTION 32
A company needs to prepare a document that establishes the responsibilities, metrics, penalties, and other generalities that a provider would have to fulfill for customers to use its platforms.
Which of the following documents meets these requirements?

DOU

SLA

MOU

SOW

QUESTION 33
A database administrator has been asked to assign a user the ability to view a data set. Which of the following practices best describes this request?

Access control

Security audit

Database audit

Password policy implementation

QUESTION 34
Which of the following is most likely to prevent tampering with server hardware that houses data?

Biometric locks

Strong password policy

Network firewall

Surveillance cameras