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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Database Fundamentals | 20% | - ACID Properties - Database Design Principles - Data Normalization - Database Concepts and Architecture - CAP Theorem - Data Models (Relational, NoSQL, etc.) |
| Topic 2: Database Deployment & Planning | 19% | - Replication Strategies - Database Server Requirements - High Availability Architecture - Disaster Recovery Planning - Database Clustering - Capacity Planning |
| Topic 3: Database Implementation | 22% | - Data Types and Constraints - Database Objects (Tables, Views, Indexes) - Data Import/Export - Stored Procedures and Functions - Triggers - SQL DDL Statements |
| Topic 4: Data Analytics & Engineering | 19% | - Data Governance - ETL Processes - Data Quality - Reporting Concepts - Data Warehousing Concepts - Data Visualization Basics |
| Topic 5: Database Support, Maintenance & Optimization | 20% | - Database Security (Users, Roles, Permissions) - Index Management - Patch Management - Backup and Recovery Procedures - Performance Monitoring - Query Optimization |
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NEW QUESTION # 77
Which of the following NFs is considered the most preferable for relational database design?
Answer: B
Explanation:
The NF (normal form) that is considered the most preferable for relational database design is 3 NF. 3 NF, or Third Normal Form, is a level of normalization that organizes data into tables and columns to reduce redundancy and improve consistency. Normalization is a process that applies a set of rules or criteria to eliminate or minimize the anomalies or problems that may arise from inserting, updating, or deleting data in a database. 3 NF is achieved when a table satisfies the following conditions: - It is in 2 NF (Second Normal Form), which means that every non-key column depends on the whole primary key and not on any subset of it - It has no transitive dependencies, which means that every non-key column depends directly on the primary key and not on any other non-key column 3 NF is considered the most preferable for relational database design because it ensures that each table has only one purpose or theme and that each column has only one value or meaning. This helps avoid data duplication, inconsistency, and update anomalies. The other options are either lower or higher levels of normalization that are either less preferable or less practical for relational database design. For example, 1 NF (First Normal Form) is the lowest level of normalization that requires each column to have atomic values and each row to have a unique identifier; 4 NF (Fourth Normal Form) is a higher level of normalization that requires each table to have no multi-valued dependencies, which means that there are no columns that can have more than one value for the same primary key value; 2 NF (Second Normal Form) is an intermediate level of normalization that requires each non-key column to depend on the whole primary key and not on any subset of it. 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 # 78
An automated script is using common passwords to gain access to a remote system. Which of the following attacks is being performed?
Answer: D
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.
NEW QUESTION # 79
An IT department needs to validate who signs in and has permissions to use the company's cloud resources. Which of the following can be used to accomplish this task?
Answer: C
Explanation:
Identity and Access Management (IAM) systems authenticate users and authorize permissions, ensuring that only validated individuals can access cloud resources.
NEW QUESTION # 80
Which of the following should a company develop to ensure preparedness for a fire in a data center?
Answer: D
Explanation:
The document that a company should develop to ensure preparedness for a fire in a data center is a disaster recovery plan. A disaster recovery plan is a document that outlines how an organization will continue its operations in the event of a disaster or disruption, such as fire, flood, earthquake, cyberattack, etc. A disaster recovery plan typically includes the following elements: - The objectives and scope of the plan - The roles and responsibilities of the staff involved - The identification and assessment of the risks and impacts - The strategies and procedures for restoring the critical functions and data - The resources and tools required for the recovery process - The testing and maintenance schedule for the plan A disaster recovery plan helps an organization to minimize the damage and downtime caused by a disaster, as well as to resume normal operations as soon as possible. The other options are either different types of documents or not specific to fire preparedness. For example, a deployment plan is a document that describes how a system or software will be installed or launched; a backup plan is a document that specifies how data will be copied and stored for backup purposes; a data retention policy is a document that defines how long data should be kept and when it should be deleted or archived. References: CompTIA DataSys+ Course Outline, Domain 5.0 Business Continuity, Objective 5.4 Given a scenario, implement disaster recovery methods.
NEW QUESTION # 81
A database administrator has configured a Resource Governor with three resource pools. The first resource pool is assigned a minimum CPU and memory value of 25%. The second resource pool is assigned a minimum CPU and memory value of 35%. The database administrator wants to assign the maximum CPU and the maximum resource pool to the third resource. Which of the following is the maximum memory the database administrator should assign to the third resource?
Answer: C
Explanation:
The first and second resource pools have a combined minimum memory allocation of 25% + 35%
= 60%. The maximum memory that can be assigned to the third resource pool is the remaining memory, which is 100% - 60% = 40%.
NEW QUESTION # 82
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