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[General] DS0-001 Guaranteed Success & Reliable DS0-001 Exam Book

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【General】 DS0-001 Guaranteed Success & Reliable DS0-001 Exam Book

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CompTIA DataSys+ Certification Exam Sample Questions (Q90-Q95):NEW QUESTION # 90
A database administrator would like for users to be able to access resources remotely from home. Which of the following best describes how the administrator can enable this access without compromising the security of the stored data?
  • A. Configure and deploy a firewall.
  • B. Implement a virtual private network.
  • C. Implement strong passwords polices.
  • D. Implement a parameter network for internet-facing database applications.
Answer: B

NEW QUESTION # 91
Which of the following types of RAID, if configured with the same number and type of disks, would provide the best write performance?
  • A. RAID 10
  • B. RAID 5
  • C. RAID 6
  • D. RAID 3
Answer: A
Explanation:
The type of RAID that would provide the best write performance if configured with the same number and type of disks is RAID 10. RAID 10, or RAID 1+0, is a type of RAID that combines mirroring and striping techniques to provide both redundancy and performance. Mirroring means that data is duplicated across two or more disks to provide fault tolerance and data protection. Striping means that data is split into blocks and distributed across two or more disks to provide faster access and throughput. RAID 10 requires at least four disks and can tolerate the failure of up to half of the disks without losing data. RAID 10 provides the best write performance among the RAID types because it can write data in parallel to multiple disks without parity calculations or overhead. The other options are either different types of RAID or not related to RAID at all. For example, RAID 3 is a type of RAID that uses striping with a dedicated parity disk to provide redundancy and performance; RAID 5 is a type of RAID that uses striping with distributed parity to provide redundancy and performance; RAID 6 is a type of RAID that uses striping with double distributed parity to provide extra redundancy and performance. Reference: CompTIA DataSys+ Course Outline, Domain 3.0 Database Management and Maintenance, Objective 3.1 Given a scenario, perform common database maintenance tasks.

NEW QUESTION # 92
A database administrator needs a tool to document and explain the relationships between data in an organization's database. Which of the following is the best tool to accomplish this task?
  • A. UML editor
  • B. SQL query
  • C. Word processor
  • D. Text editor
Answer: A
Explanation:
The best tool for the database administrator to document and explain the relationships between data in an organization's database is a UML editor. A UML editor is a software application that allows users to create, edit, and visualize diagrams using the Unified Modeling Language (UML). UML is a standard language for modeling software systems and their components, such as classes, objects, relationships, behaviors, etc. UML can also be used to document and explain the relationships between data in an organization's database by creating entity relationship diagrams (ERDs), which are graphical representations of the entities (tables), attributes (columns), and relationships (constraints) in a database. A UML editor can help the administrator to document and explain the relationships between data by providing features such as drag-and-drop, templates, symbols, validation, etc. The other options are either not suitable or not optimal for this task. For example, a text editor is a software application that allows users to create and edit plain text files; a word processor is a software application that allows users to create and edit text documents; an SQL query is a statement that performs an operation on a database using Structured Query Language (SQL). Reference: CompTIA DataSys+ Course Outline, Domain 2.0 Database Deployment, Objective 2.2 Given a scenario, create database objects using scripting and programming languages.

NEW QUESTION # 93
A database administrator is concerned about transactions in case the system fails. Which of the following properties addresses this concern?
  • A. Isolation
  • B. Durability
  • C. Atomicity
  • D. Consistency
Answer: B
Explanation:
The property that addresses this concern is durability. Durability is one of the four properties (ACID) that ensure reliable transactions in a database system. Durability means that once a transaction has been committed, its effects are permanent and will not be lost in case of system failure, power outage, crash, etc. Durability can be achieved by using techniques such as write-ahead logging, checkpoints, backup and recovery, etc. The other options are either not related or not specific to this concern. For example, isolation means that concurrent transactions do not interfere with each other and produce consistent results; atomicity means that a transaction is either executed as a whole or not at all; consistency means that a transaction preserves the validity and integrity of the data. Reference: CompTIA DataSys+ Course Outline, Domain 1.0 Database Fundamentals, Objective 1.3 Given a scenario, identify common database issues.

NEW QUESTION # 94
A database administrator would like to address data inconsistencies, define conventions to be used across the organization, make data easier to analyze, and enforce the use of data standards. Which of the following solutions would best meet the administrator's need?
  • A. Data dictionary
  • B. Word processor
  • C. Entity relationship diagram
  • D. Unified modeling language
Answer: A
Explanation:
A data dictionary standardizes definitions and formats, helping enforce data consistency, conventions, and easier analysis across the organization.

NEW QUESTION # 95
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