Free CompTIA ITF+ FC0-U61 Practice Test

The ALTER TABLE command is used to modify the existing structure of a database table, such as adding a new column. In this scenario, the correct command to add a new column to an existing table is ALTER TABLE Employees ADD COLUMN PhoneNumber VARCHAR(10);. The incorrect options presented involve either SQL commands for other operations or incorrect syntax.

Critical data includes information essential to the operation of a business, such as customer databases, financial records, and proprietary information. This data must be identified and prioritized for effective business continuity planning. Backing up non-critical data, although important, does not have the same level of priority. Temporary files and system logs, while useful for various purposes, are generally not considered critical data and would not typically be the focus of immediate recovery efforts in most business continuity plans.

An associative array (also known as a map, dictionary, or hash table) is best suited for this kind of task where you have a key-value pair, where the key is the staff member's name and the value is their office room number. This allows for quick lookups of room numbers associated with staff names. Using a standard array would not be efficient, as it does not associate room numbers with names directly. A variable is too limited as it typically holds a single value or data point. A string cannot inherently represent the key-value relationship and would require additional mechanisms to pair room numbers with staff names.

In a relational database, a Primary key is used to uniquely identify each record in a table. This ensures that there are no duplicate records for any given entity and that each can be uniquely accessed. A Field/column is a different concept referring to an individual piece of data in a record, such as an employee's name or address. A schema defines the overall structure of the database, including tables and their relationships, but it itself does not uniquely identify records. A foreign key is a field in one table that uniquely identifies a row of another table, but it does not necessarily provide uniqueness within its own table.

The correct answer is 'CREATE TABLE'. This is because when establishing a new database, the 'CREATE TABLE' command is used to define a new table with its column definitions and data types. It sets the foundation for the data that will be stored. 'ALTER TABLE' is used to modify an existing table, not to create one. 'CREATE DATABASE' is used to create a database, not a table within a database. 'INSERT INTO' is used to add data to an existing table.

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.

802.11ac, also known as Gigabit Wi-Fi, offers significantly higher data transmission speeds than 802.11n. 802.11ac operates exclusively in the 5GHz band and can achieve speeds up to several gigabits per second, whereas 802.11n, which can operate in both 2.4GHz and 5GHz bands, has a theoretical maximum speed of 600 Mbps.

The correct answer is true because a function is a reusable block of code that performs a specific task. It can be called multiple times within a program, allowing for code reusability and better organization. While functions are designed to execute instructions, they must be explicitly called to perform their tasks; they do not execute independently or continuously without being invoked.

The data type that best describes a sequence of characters, such as 'John Smith', is a String. Strings are used to represent and work with text. A Char represents a single character, while Types Integers and Floats are used to store numerical data, and a Boolean represents true or false values, none of which are suitable for representing a full name.

The installation of the correct driver software is crucial as it allows the operating system to correctly identify and communicate with the printer, facilitating all its features and functions. While automatic or generic drivers might sometimes be installed, they may not support all the features of the printer. Manufacturer-provided drivers are specifically designed for their devices, which is why they are generally the best option.

Structured Query Language (SQL) is the correct answer because it is specifically designed to communicate with and manipulate databases. SQL is used to insert, query, update, and delete data from relational databases. Java is a general-purpose programming language, CSS is used for styling web pages, and HTML is used to create the structure of web pages, but none of these languages are used to interact directly with databases in the same way SQL is.

A function in programming is a set of instructions that performs a specific task and can be reused throughout the program. It helps to organize code, making it more modular and easier to maintain. A function typically takes input, processes it, and returns an output. The option 'A block of code designed to perform a particular task, which can be executed when the function is called' is the best answer because it encapsulates the essence of what a function is within programming. The incorrect options describe aspects that may be related to functions (like variables and looping) but do not accurately define the primary purpose and use of a function.

Non-structured data does not conform to a predefined data model or schema, allowing data to be stored in its natural form. This is different from structured data, which requires a predefined schema and is organized into tables with rows and columns. Semi-structured data is a form that does not reside in relational databases but still has some organizational properties that make it easier to analyze than non-structured data.

The correct answer is 'Online workspace'. An online workspace is designed to facilitate collaborative work in real time, and includes features such as simultaneous document editing, real-time feedback, and tracking version history, making it the most fitting option for the team's needs. 'Email client' is primarily for sending and receiving emails, which is not optimal for real-time collaboration and simultaneous document editing. 'Conferencing software' is mainly for virtual meetings and does not offer comprehensive document editing or versioning features. 'Instant messaging software' is designed for direct messaging and may lack the advanced document collaboration capabilities the team requires.

The correct unit of measure for data transmission speed over a network, such as the internet, is bps (bits per second). This measure is commonly used to describe the rate at which data is transferred. Options like Hz and ops are measures of frequency and operations per second, respectively, and are not directly related to data transmission speeds. GB is a unit of data storage capacity, not speed.