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NEW QUESTION # 12
Which of the following is a result of an on-path attack on a system?
Answer: D
Explanation:
A result of an on-path attack on a system is a Wi-Fi network that redirects to clones of legitimate websites. An on-path attack is a type of attack that intercepts and modifies the traffic between two parties without their knowledge or consent. An attacker can use an on-path attack to create a rogue Wi-Fi network that mimics a legitimate one, and then redirect the users to fake websites that look like the ones they intended to visit. The attacker can then steal the users' personal or financial information, such as usernames, passwords, credit card numbers, or bank account details. The other options are either results of different types of attacks or not related to attacks at all. For example, a website that has crashed and is no longer accessible may be a result of a denial-of-service attack, an email from an unknown source requesting bank account details may be a result of a phishing attack, and a web application that returns the addresses of its customers may be a result of a poor design or a data breach. Reference: 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 # 13
(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: B,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 # 14
Which of the following is an advantage of creating indexes?
Answer: B
Explanation:
The advantage of creating indexes is to provide quick and efficient access to data. An index is a data structure that stores the values of one or more columns of a table in a sorted order, along with pointers to the corresponding rows in the table. An index helps to speed up queries that search, filter, sort, or join data based on the indexed columns, as it reduces the number of disk accesses or scans required to locate the desired data. An index also helps to enforce uniqueness or referential integrity constraints on the indexed columns. The other options are either not true or not relevant for this purpose. For example, an index does not help with space allocation, as it consumes additional space in the database; an index does not reduce memory, as it may use memory for caching or buffering purposes; an index does not update the query plan, as it is an input or a factor for the query optimizer to generate the query plan. Reference: 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 # 15
Which of the following is used to document the system catalog in a database?
Answer: B
Explanation:
A data dictionary documents the system catalog by providing metadata about database objects, their structure, and relationships within the database.
NEW QUESTION # 16
Which of the following have data manipulation and procedural scripting power? (Choose two.)
Answer: A,D
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 # 17
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