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NEW QUESTION # 79
Which of the following is a characteristic of all non-relational databases?
Answer: B
Explanation:
The characteristic of all non-relational databases is unstructured data. Unstructured data is data that does not have a predefined or fixed format, schema, or structure. Unstructured data can include various types of data, such as text, images, audio, video, etc. Non-relational databases, also known as NoSQL databases, are databases that store and manage unstructured data using different models, such as key-value, document, graph, columnar, etc. Non-relational databases are suitable for handling large volumes, variety, and velocity of data that do not fit well in the relational model. The other options are either characteristics of relational databases or not related to database types at all. For example, columns with the same data type, logical record groupings, and tabular schema are characteristics of relational databases, which are databases that store and manage structured data using tables, rows, columns, and constraints. References: CompTIA DataSys+ Course Outline, Domain 1.0 Database Fundamentals, Objective 1.1 Given a scenario, identify common database types.
NEW QUESTION # 80
Which of the following cloud delivery models provides users with the highest level of flexibility regarding resource provisioning and administration?
Answer: B
Explanation:
The cloud delivery model that provides users with the highest level of flexibility regarding resource provisioning and administration is IaaS. IaaS, or Infrastructure as a Service, is a cloud delivery model that provides users with access to virtualized computing resources, such as servers, storage, network, and operating systems, over the internet. Users can provision, configure, and manage these resources according to their needs and preferences, without having to worry about the maintenance or security of the physical infrastructure. IaaS offers users the most control and customization over their cloud environment, as well as the ability to scale up or down as needed. The other options are either different cloud delivery models or not related to cloud computing at all. For example, DBaaS, or Database as a Service, is a cloud delivery model that provides users with access to database management systems and tools over the internet; SaaS, or Software as a Service, is a cloud delivery model that provides users with access to software applications and services over the internet; PaaS, or Platform as a Service, is a cloud delivery model that provides users with access to development platforms and tools over the internet.
NEW QUESTION # 81
(Which of the following is a characteristic of a multizone region in a disaster recovery policy?)
Answer: D
Explanation:
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.
NEW QUESTION # 82
A database administrator needs to ensure database backups are occurring on a daily basis and at scheduled times. Which of the following actions should the administrator take?
Answer: C
Explanation:
The action that the administrator should take is to review the server logs for entries. Server logs are files that record the events and activities that occur on a server, such as database backups, errors, warnings, or failures. By reviewing the server logs, the administrator can verify that the database backups are occurring on a daily basis and at scheduled times, and also identify any issues or anomalies that may affect the backup process or the backup quality. The other options are either not relevant or not sufficient for this task. For example, querying the database to observe entries may not show the backup status or frequency, checking the database schema may not reflect the backup schedule or policy, and reviewing the backup media may not indicate the backup time or duration.
NEW QUESTION # 83
Which of the following describes a scenario in which a database administrator would use a relational database rather than a non-relational database?
Answer: C
Explanation:
A scenario in which a database administrator would use a relational database rather than a non- relational database is when an organization wants to maintain consistency among the data in the database. A relational database is a type of database that organizes data into tables with predefined columns and rows, and enforces rules and constraints to ensure data integrity and accuracy. A relational database also supports transactions, which are sets of operations that must be executed as a whole or not at all, to prevent data corruption or inconsistency. The other options are either not exclusive to relational databases or not relevant to the choice of database type. For example, data encryption can be applied to both relational and non-relational databases, processing complex data sets may require specialized tools or techniques that are not dependent on the database type, and storing a large number of videos, photos, and documents may be better suited for a non-relational database that can handle unstructured or semi- structured data.
NEW QUESTION # 84
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