CompTIA ITF+ Practice Test (FC0-U61)

HDMI (High-Definition Multimedia Interface) is the correct choice as it is the industry standard for connecting consumer electronics like televisions, and it is designed to transmit both high-definition video and digital audio over a single cable. DisplayPort also supports HD video and audio but is more common on PCs and computer monitors than on televisions. VGA is an older, analog standard that does not transmit audio and generally supports lower resolutions. DVI is primarily a video-only digital interface and does not typically carry audio signals.

An attribute of an object is used to store data specific to that object. In this case, a unique code that identifies a project among others would be stored as an attribute of the 'Project' object. This would allow each 'Project' instance to have its own identification code. On the other hand, methods are used to define actions or behaviors of an object, not to store unique data.

The correct answer is 'Mbps', which stands for 'megabits per second'. It is used to measure network transmission speeds, and it is correct because '100 megabits per second' translates directly to '100 Mbps'. The 'M' stands for 'mega', indicating million, and 'bps' stands for 'bits per second'. 'MBps' would be incorrect because it means 'megabytes per second', where a byte is 8 bits and not commonly used in representing network speeds. 'Gbps' represents 'gigabits per second', which is one thousand times faster than 'Mbps'. 'Kbps' represents 'kilobits per second', which is one thousand times slower than 'Mbps'.

Changing the default password is crucial for the security of any device before it connects to a network, especially in sensitive environments such as healthcare. It helps prevent unauthorized access to the device. Keeping the default password is a common security risk, as default passwords are easily obtainable by malicious parties. Updating the firmware may contain important security patches but does not directly secure the device's access credentials. Enabling Bluetooth does not secure a device on a wireless network and can pose additional security risks if not managed properly.

The decimal system, also known as the base-10 system, uses ten digits (0 through 9) to represent numbers. This system is the most commonly used numerical system in everyday life.

The company's database is valuable because it can be analyzed to drive data-driven business decisions, allowing the company to create targeted marketing campaigns and thus increase its effectiveness and profitability. On the other hand, customer names and dates would not inherently drive business decisions without additional context. The size of the database does not directly relate to value unless that size correlates with comprehensive data that can be utilized for analysis. And while data entry is an important function, it is not a measure of the data's value.

Documenting findings, actions, and outcomes helps create a knowledge base that technicians can refer to when similar issues arise. This practice not only reduces problem resolution time but also aids in training new team members and improving overall system reliability. Reporting the issue to your immediate supervisor is a good step for transparency, but it does not help others learn from the problem. Testing the solution again ensures the immediate problem is fixed, but does not provide a long-term benefit. Creating a backup plan is proactive, but unrelated to documenting the process for others.

A uniqueness constraint ensures that all values in a column are different from one another. This is crucial to prevent duplicate entries that can lead to inconsistencies in the database. For example, if the uniqueness constraint is applied to a customer email column, it guarantees that each email address is only entered once, thus maintaining the uniqueness of the customer records. The other options are incorrect because a relational constraint does not ensure uniqueness, a primary key is a specific type of uniqueness constraint but does not describe its purpose, and the foreign key constraint is associated with linking tables together, not ensuring uniqueness.

In a two-tier architecture, the client application constitutes the first tier, directly interacting with the database or server as the second tier. This setup manages user interfaces and application logic on the client’s side, while the database system is stored on the server side. The absence of an intermediate layer between the client and the server is why it is named a two-tier architecture. A three-tier architecture would include another separate layer, typically the business logic, which is not mentioned in the scenario.

802.11ac (Wi-Fi 5) operates only in the less-crowded 5 GHz band and introduces wider 80/160 MHz channels, higher-order 256-QAM modulation, more spatial streams and mandatory beamforming. These enhancements raise theoretical throughput to well over 1 Gbps and maintain stronger links at a given distance compared with 802.11g or 802.11n gear. While 802.11n can work on both 2.4 GHz and 5 GHz and offers better performance than 802.11g, its maximum speed (≈450 Mbps) is still far below 802.11ac. Legacy standards such as 802.11a, 802.11b and 802.11g cannot meet modern bandwidth demands.

The best course of action to verify that the recent patches have not disrupted a critical application is to perform end-to-end testing of all the application's functions. Simply verifying that the application launches or relying on automated tools may not reveal intricate issues within specific workflows. Comprehensive testing is essential to confirm complete functionality and is an example of thorough post-update verification.

Configuration settings of an application are typically set once and do not change while the application is running. The use of a constant is appropriate in this case because constants are meant to store data that remains the same throughout the execution of the program. Although environment variables could seem like a tempting answer since they can hold configuration settings as well, they are not ideal in this case as they are mutable and can introduce risks if changed at runtime. Literal strings and user input variables are incorrect choices because they pertain to different contexts; literal strings represent fixed string data, and user input variables are intended for data that is expected to change as it relies on the user's interaction.

The correct answer is Indexing. A database index is a data structure used to improve the speed of data retrieval operations on a table. It works similarly to an index in a book, allowing the database to find specific data without scanning the entire table.

• A Full table scan is the process of reading every row in a table to find the requested data, which is generally slow and inefficient for large tables.
• A Primary key's main purpose is to uniquely identify each record in a table, ensuring data integrity. While primary keys are typically indexed to make them fast to look up, the key itself is a constraint for uniqueness, whereas the index is the feature for speed.
• Data persistence ensures that data is stored permanently on non-volatile storage and is not lost when the application or system shuts down. This relates to data durability, not retrieval speed.

This process is an example of data-driven business decisions. The company is using data capture and collection to analyze and correlate sales information to make informed decisions about product offerings, exemplifying how data can be turned into actionable insights to support business strategies.

In a relational database, a 'Primary Key' in one table is used to uniquely identify each record in that table. To relate this table to another, the primary key is included in the second table where it is known as a 'Foreign Key'. Therefore, the 'PatientID' from the 'Patients' table should be included in the 'Appointments' table as a 'Foreign Key' to establish a relationship between patients and their appointments. This approach correctly maintains referential integrity by ensuring that every appointment record is associated with a valid patient record. The other options do not correctly establish this connection within the context of a relational database structure.

Data persistence refers to the characteristic of stored data that survives beyond the lifetime of the process or power cycle that created it. By writing to non-volatile storage, the data remains available and intact after reboots, crashes, or power outages, until someone intentionally modifies or deletes it. This durability is essential to a database's role as long-term information storage, whereas factors such as speed, concurrency, or data variety are addressed by other database features.

Using point-of-sale (POS) systems allows for direct collection of detailed information on customer purchases, which is integral for analyzing shopping patterns. Customer surveys may provide insights but are less reliable due to their voluntary and often subjective nature. A website's "About Us" page and generic email feedback are not methods to collect data on customer shopping patterns, as they do not generally contain information specific to purchasing habits.

When a browser receives an expired SSL/TLS certificate, it cannot verify that the site is still trusted. Therefore, it halts the normal HTTPS handshake and presents the user with a full-screen security warning (for example, Chrome's "Your connection is not private"). The user may choose to view the certificate details, return to safety, or continue at their own risk. Browsers do not automatically trust the expired certificate, silently downgrade to HTTP, or fetch a replacement certificate on the site's behalf.

The correct answer is DELETE FROM Customer WHERE Status = 'Closed';. This SQL command specifies that only those records from the customer table where the 'Status' field is equal to 'Closed' should be deleted. It does not remove the table structure or records that do not meet the specified condition. The TRUNCATE TABLE Customer; command would remove all records from the table, not just those with a 'Closed' status. The DROP TABLE Customer; command would delete the entire table including its structure. The SELECT * FROM Customer WHERE Status = 'Closed'; command is incorrect because it only selects records without deleting them.

Smart thermostats typically connect to the internet through a Wi-Fi connection, enabling remote access and control through a smartphone app. Bluetooth is generally used for close-range connections, not for remote access. NFC is more commonly used for contactless payments, and IR is used for remote controls that require a direct line of sight and are not internet-enabled.