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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Database Fundamentals | 20% | - Data Models (Relational, NoSQL, etc.) - Database Design Principles - CAP Theorem - Data Normalization - ACID Properties - Database Concepts and Architecture |
| Topic 2: Database Implementation | 22% | - Triggers - Database Objects (Tables, Views, Indexes) - Stored Procedures and Functions - Data Types and Constraints - Data Import/Export - SQL DDL Statements |
| Topic 3: Database Deployment & Planning | 19% | - Database Server Requirements - Capacity Planning - High Availability Architecture - Replication Strategies - Database Clustering - Disaster Recovery Planning |
| Topic 4: Data Analytics & Engineering | 19% | - Data Visualization Basics - Data Quality - Data Warehousing Concepts - Data Governance - Reporting Concepts - ETL Processes |
| Topic 5: Database Support, Maintenance & Optimization | 20% | - Index Management - Backup and Recovery Procedures - Query Optimization - Database Security (Users, Roles, Permissions) - Performance Monitoring - Patch Management |
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NEW QUESTION # 46
Which of the following have data manipulation and procedural scripting power? (Choose two.)
Answer: A,F
Explanation:
The two options that have data manipulation and procedural scripting power are PL/SQL and T-SQL. PL
/SQL, or Procedural Language/Structured Query Language, is an extension of SQL that adds procedural features to SQL for Oracle databases. PL/SQL allows users to create and execute stored procedures, functions, triggers, packages, etc., using variables, loops, conditions, exceptions, etc., in addition to SQL commands. PL
/SQL helps improve the performance, functionality, modularity, and security of SQL queries and applications.
T-SQL, or Transact-SQL, is an extension of SQL that adds procedural features to SQL for Microsoft SQL Server databases. T-SQL allows users to create and execute stored procedures, functions, triggers, etc., using variables, loops, conditions, exceptions, etc., in addition to SQL commands. T-SQL helps improve the performance, functionality, modularity, and security of SQL queries and applications. The other options are either not related or not having both data manipulation and procedural scripting power. For example, PQL, or Power Query Language, is a data analysis and transformation language for Microsoft Power BI and Excel; Advanced SQL is a term that refers to the advanced features or techniques of SQL, such as subqueries, joins, aggregations, etc.; SQL, or Structured Query Language, is a standard language for manipulating and querying data in relational databases, but it does not have procedural features. References: CompTIA DataSys+ Course Outline, Domain 1.0 Database Fundamentals, Objective 1.2 Given a scenario, execute database tasks using scripting and programming languages.
NEW QUESTION # 47
Which of the following describes the purpose of a snapshot?
Answer: B
Explanation:
The purpose of a snapshot is to create an image of a database. A snapshot is a copy of the state and content of a database at a specific point in time. A snapshot can be used for various purposes, such as backup and recovery, testing and development, reporting and analysis, etc. A snapshot can be created using various techniques, such as full copy, incremental copy, differential copy, etc. A snapshot can also be created using various tools or commands provided by the database system or software. The other options are either incorrect or irrelevant for this question. For example, dynamic data replication is a process that copies and synchronizes data from one database server (the source) to one or more database servers (the target) in real time; a synonym is an alias or an alternative name for an object in a database; C is an incomplete option. 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 # 48
A company is launching a proof-of-concept, cloud-based application. One of the requirements is to select a database engine that will allow administrators to perform quick and simple queries on unstructured data.
Which of the following would be best suited for this task?
Answer: B
Explanation:
The best suited database engine for this task is MongoDB. MongoDB is a type of non-relational database that stores data as documents in JSON-like format. MongoDB allows administrators to perform quick and simple queries on unstructured data, such as text, images, videos, or social media posts, without requiring a predefined schema or complex joins. MongoDB also supports cloud-based deployment, scalability, and high availability. The other options are either relational databases that require a fixed schema and structure for data, or specialized databases that are designed for specific purposes, such as graph databases for storing and analyzing network data.
NEW QUESTION # 49
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?
Answer: A
Explanation:
The administrator should use peer-to-peer replication to achieve this objective. Peer-to-peer replication is a type of replication that allows data to be distributed across multiple database instances that are equal partners, or peers. Each peer can read and write data that will be synchronized across all peers. This provides high availability, scalability, and load balancing for the application. The other options are either not suitable for this scenario or do not support bidirectional data synchronization. For example, failover clustering provides high availability but does not distribute the workload across multiple instances; log shipping provides disaster recovery but does not allow writing data to secondary instances; availability groups provide high availability and read-only access to secondary replicas but do not support peer-to-peer replication. Reference: CompTIA DataSys+ Course Outline, Domain 5.0 Business Continuity, Objective 5.3 Given a scenario, implement replication of database management systems.
NEW QUESTION # 50
Which of the following code snippets would allow a SQL injection?
var name;
Answer: D
Explanation:
This code directly concatenates user input into an SQL query string without validation or parameterization, making it vulnerable to SQL injection attacks.
NEW QUESTION # 51
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