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NEW QUESTION # 23
A database administrator manages a database server that is running low on disk space. A lot of backup files are stored on the server's disks.
Which of the following is the best action for the administrator to take?
Answer: A
Explanation:
The best action for the administrator to take is to delete all the backup files that are not required by the backup retention policy. This will free up disk space on the server and also comply with the best practices for data backup and recovery. The backup retention policy defines how long the backup files should be kept and when they should be deleted or archived. The other options are either risky, inefficient, or impractical. For example, moving all the backup files to external disks would require additional hardware and time, deleting all the backup files containing data that is rated as classified would compromise data security and compliance, and deleting all the backup files except for the most recent one would limit the recovery options in case of a disaster. References: CompTIA DataSys+ Course Outline, Domain 5.0 Business Continuity, Objective 5.2 Given a scenario, implement backup and restoration of database management systems.
NEW QUESTION # 24
An automated script is using common passwords to gain access to a remote system. Which of the following attacks is being performed?
Answer: A
Explanation:
The attack that is being performed is brute-force. A brute-force attack is a type of attack that tries to guess a password or a key by systematically trying all possible combinations of characters or values until the correct one is found. A brute-force attack can use common passwords, such as "123456", "password", or "qwerty", as well as dictionaries, word lists, or patterns to speed up the process. A brute-force attack can target a remote system, such as a web server, an email account, or a network device, and gain unauthorized access to its data or resources. The other options are either different types of attacks or not related to password guessing. For example, a DoS, or Denial-of-Service, attack is a type of attack that floods a system with requests or traffic to overwhelm its capacity and prevent legitimate users from accessing it; an SQL injection attack is a type of attack that inserts malicious SQL statements into an input field or parameter of a web application to manipulate or compromise the underlying database; a phishing attack is a type of attack that sends fraudulent emails or messages that appear to come from a trusted source to trick users into revealing their personal or financial information. References: CompTIA DataSys+ Course Outline, Domain 4.0 Data and Database Security, Objective 4.4 Given a scenario, identify common types of attacks against databases.
NEW QUESTION # 25
(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.)
Answer: A,E
Explanation:
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.
NEW QUESTION # 26
(An analyst in the United States configured a database server so it could be accessed remotely by users in Brazil and Canada. Users in Brazil can connect to the server, but users in Canada cannot connect to the server.
Which of the following is the reason for the issue?)
Answer: B
Explanation:
The correct answer is B. The rule set was configured to allow specific IP addresses. CompTIA DataSys+ materials emphasize the importance of network security controls, particularly firewall rules and access control lists (ACLs), in regulating remote database access. In this scenario, the database server is reachable by users in Brazil but not by users in Canada, which strongly indicates that access is being selectively permitted rather than globally blocked.
Firewall rule sets are often configured using IP-based allowlists, where only approved IP addresses or IP ranges are permitted to establish a connection. If the analyst allowed the IP address range associated with Brazil but did not include the IP range used by Canadian users, connections from Canada would fail while Brazilian users would still have access. This behavior aligns precisely with selective rule-based access control, a common best practice highlighted in DataSys+ for reducing attack surfaces.
Option A is incorrect because if the perimeter network were rejecting remote connections entirely, users in Brazil would also be unable to connect. Option C is incorrect for the same reason: a firewall rule denying all connections would block access from all locations, not just Canada. Option D, server port security being disabled, would typically prevent all inbound connections to the database service, again affecting all users regardless of geography.
CompTIA DataSys+ stresses that troubleshooting connectivity issues requires identifying whether failures are global or location-specific. Location-specific failures are most commonly caused by misconfigured firewall rules, IP filtering, or regional access restrictions. In database environments that support remote access, DBAs must ensure that firewall rules are consistently applied to all authorized networks.
Therefore, the most accurate and verified explanation is that the rule set was configured to allow specific IP addresses, and the Canadian users' IP range was not included. This makes option B the correct answer.
NEW QUESTION # 27
Which of the following services is responsible for assigning, managing, and reclaiming IP addresses on a TCP
/IP-based network?
Answer: B
Explanation:
The service that is responsible for assigning, managing, and reclaiming IP addresses on a TCP/IP-based network is DHCP. DHCP, or Dynamic Host Configuration Protocol, is a service that automatically assigns IP addresses and other network configuration parameters, such as subnet mask, default gateway, DNS server, etc., to computers or devices on a network. DHCP helps simplify the administration and management of IP addresses on a network, as well as avoid conflicts or errors caused by manual or duplicate assignments.
DHCP also allows computers or devices to release or renew their IP addresses when they join or leave the network. The other options are either different services or not related to IP addresses at all. For example, DNS, or Domain Name System, is a service that translates domain names into IP addresses and vice versa; LDAP, or Lightweight Directory Access Protocol, is a service that provides access to directory information such as users, groups, or devices on a network; ISMTP is not a valid acronym or service. References: CompTIA DataSys+ Course Outline, Domain 2.0 Database Deployment, Objective 2.1 Given a scenario, select an appropriate database deployment method.
NEW QUESTION # 28
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