CompTIA IT Fundamentals (FCO-U61) # 3 Flashcards
Quiz 3
HTML and XML are examples of which of the following language categories?
Markup Language
Overall explanation
Markup languages like HTML and XML are designed to annotate or “mark up” text. They provide structure and format to a text document, like a web page, and offer tags that describe elements in the document. Elements can include paragraphs, headings, links, and more. “Scripted Language” and “Scripting Language” are often used interchangeably. They refer to programming languages that are used to automate commands and create scripts that perform a series of actions. HTML and XML do not fall into this category as they are used for structuring and presenting data, not for automating tasks or adding functionality. Scripting languages, such as JavaScript, are designed to automate processes that would usually need to be executed step-by-step by a human operator. While scripting languages can manipulate markup language elements in a web document, they are not categories that HTML or XML fall into. Interpreted languages are programming languages that are executed directly at runtime by an interpreter rather than being compiled into binary code beforehand. Examples include Python and JavaScript, but not HTML or XML.
Which of the following statements is true about common units of measure in computing?
Megabyte (MB) is a unit used to measure digital storage.
Overall explanation
A Megabyte (MB) is a unit of digital information typically used to quantify storage capacity in computing. It roughly equals one million bytes or precisely 1,048,576 bytes due to the binary system used in computers. Bits per second is a measure of data transfer speed, not image resolution. It quantifies how much data can be sent or received per second over a network or other data transmission channel. Hertz is a unit of frequency, not of storage. It’s used to measure cycles per second, such as the clock speed of a CPU, and is not related to storage capacity. A Gigabyte is not a measure of processing speed but rather of data storage. It is a unit of digital information storage that’s approximately 1 billion bytes, or more accurately, 1,073,741,824 bytes due to the binary system used in most storage devices.
According to the 802.11x wireless standards, which one offers the BEST speed?
802.11ac
Overall explanation
The 802.11ac version of the 802.11x standard incorporates technology that allows for the fastest data transfer rate, which makes it the fastest wireless standard currently available. 802.11g provides a faster data transfer rate than 802.11b, but it is still slower than the newer 802.11ac standard. Though the 802.11a standard offered a significant advancement in its time, is not the fastest standard of the options provided. 802.11b offers a lower bandwidth than newer standards, hence it provides slower data transfer speeds.
Samantha is installing a public Wi-Fi network for a café. She decided to use the 802.11b standard. What maximum speed can her customers expect from this network?
11 Mbps
Overall explanation
802.11b supports a maximum throughput of 11 Mbps, making it suitable for basic browsing and email, but slower for more data-intensive activities. 54 Mbps is associated with the 802.11g standard, not 802.11b. 433 Mbps is a typical speed associated with 802.11ac (per spatial stream), not 802.11b. 600 Mbps is associated with the 802.11n standard, not 802.11b.
Matthew works at Dion Training. As part of his role, he often accesses sensitive client information and confidential data. The security team wants to implement an additional layer of security to ensure that only authorized individuals can access this information. Which authentication method would provide the highest level of security for accessing sensitive client information and confidential data at Dion Training?
Multifactor authentication using a combination of password and biometrics
Overall explanation
Multifactor authentication involves using two or more factors for authentication. Combining a strong password with biometric authentication, such as fingerprint or iris scan, provides an additional layer of security and is suitable for accessing sensitive information. Therefore, this is the correct answer. Single-factor authentication with a strong password relies on a single factor, a strong password, for authentication. While a strong password is essential, it may not provide the highest level of security for accessing sensitive client information and confidential data, especially if the password is compromised. Single-factor authentication with a hardware token involves using a physical device, such as a USB token or smart card, for authentication. While it adds an extra layer of security compared to just a password, it may not be as strong as multifactor authentication with biometrics. Single sign-on (SSO) allows users to access multiple systems or applications with a single set of credentials. While convenient, SSO with a PIN alone may not offer the highest level of security for sensitive client information and confidential data.
Incorrect
Which among the following units of data measurement is the smallest?
Byte
Overall explanation
A byte is the smallest unit of digital information among the choices. It’s considered as the basic unit of data in computer systems. In most computer systems, a byte is a unit of data that is eight binary digits long. A byte is the unit most computers use to represent a character such as a letter, number, or typographic symbol (for example, “g”, “5”, or “?”). A Megabyte is larger than a Kilobyte, and is approximately one million bytes (more precisely 1,048,576 bytes due to the binary system). It is incorrect because it is much bigger than a Byte. A Kilobyte is larger than a Byte, equivalent to 1024 Bytes. It is incorrect because it is larger than a Byte. A Gigabyte is larger than a Megabyte, and is approximately one billion bytes (more precisely 1,073,741,824 bytes due to the binary system). It is again incorrect because it is even larger than both a Byte and a Megabyte.
In building the logic of a program, which of the following components allow the execution flow to be controlled and altered based on predetermined conditions? (Select TWO).
Looping
Branching
Overall explanation
Looping indeed controls the execution flow as it repeats a section of code a specified number of times or until a condition is met. Branching allows the flow of execution to be controlled as it can follow different paths based on conditional statements, effectively altering the flow based on the evaluation of these conditions. Comments are useful for readability and maintenance, but they’re only informational and do not impact the flow of execution. While variable declaration is a fundamental part of programming code, it doesn’t directly control the flow of execution based on conditions. Input and output operations interact with the user or system to receive or provide data but do not control the execution flow based on conditions.
What is the equivalent speed of 1 Gigabit per second (Gbps) in Megabits per second (Mbps)?
1000 Mbps
Overall explanation
Since throughput units always use the decimal system (base 10). For data transfer rates, 1 Gigabit per second (Gbps) is equal to 1000 Megabits per second (Mbps). This is in accordance with the SI (International System of Units) standards which are typically used for metric (decimal-based) measurements in throughput rates. The relationship between Gigabits and Megabits is not 1:1. Since throughput units always use the decimal system (base 10). For data transfer rates, 1 Gigabit per second (Gbps) is equal to 1000 Megabits per second (Mbps). 500 Mbps is half of the required amount. Since throughput units always use the decimal system (base 10). For data transfer rates, 1 Gigabit per second (Gbps) is equal to 1000 Megabits per second (Mbps). While in digital storage calculations we usually use the binary system (base 2), where 1 Gigabyte would equal 1024 Megabytes, for data throughput, we use the decimal system (base 10) where 1 Gigabit equals 1000 Megabits.
Which of the following server operating systems is known for its open-source availability?
Ubuntu Server
Overall explanation
Ubuntu Server is renowned as an open-source server operating system. It provides flexibility and adaptability, allowing users to modify and distribute their own versions as needed. While macOS Server is a server OS, it is not open-source. It is owned and controlled by Apple Inc. Windows Server 2019 is a product of Microsoft and is not open-source. It operates under a commercial license. IBM i is a server operating system developed by IBM, and it is not open-source. IBM maintains complete control over its development and distribution.
Adam wants to move large video files from his work computer to his home computer. Which storage device is MOST suitable to carry these files due to its portability?
Flash Drive
Overall explanation
Flash drives are portable and can hold a significant amount of data, which will allow the user to easily transfer his large video files between computers. Network Attached Storage devices are useful for shared, networked storage, but they’re not designed for portability, making them impractical for the user’s needs of moving data between locations. Hard Disk Drives, while storing a lot of data, are not as portable or convenient to move between computers as a flash drive. RAM is volatile, meaning it doesn’t retain data once the computer is switched off, making it unsuitable for the user’s need of transferring data.
John is a freelance graphic designer who created a unique poster design for a client’s event. A year later, he discovers that another company has been using his design in their marketing materials without his permission. What should John do in this situation?
Contact the company to discuss the issue and consult with a lawyer about copyright infringement
Overall explanation
The first step should be to communicate with the other party. If that doesn’t resolve the issue, consulting with a lawyer about potential copyright infringement would be the next step. John shouldn’t have to redesign his work. He has the right to protect his copyrighted material. Ignoring potential copyright infringement could lead to loss of income and damage to his professional reputation. While it’s understandable that John might be upset, public shaming isn’t a professional first step and could potentially escalate the situation.
Which of the following statements BEST describes why investing in security is crucial for an organization?
It protects the organization’s data and information assets
Overall explanation
Security measures protect an organization’s data and information from unauthorized access, alteration, or destruction, making it a crucial investment. While security can indirectly contribute to a company’s reputation, it’s not directly involved in marketing products. While effective security can prevent financial losses due to breaches, it’s not primarily aimed at increasing profit margins. While security is important for a website, it doesn’t directly influence the website’s aesthetic appeal.
Rosa wanted to use a geo-restricted service from abroad. What should she do in her web browser to access the service?
Configure proxy settings
Overall explanation
A proxy can disguise the actual location by providing a new IP address. This could help her access the geo-restricted service from abroad. Certificates confirm security between web browsers and websites, but they don’t help access geo-restricted content. Private browsing protects local privacy (like browsing history), but it doesn’t change the geographical location of the IP address. Unless the add-on or extension is specifically designed to bypass geo-restrictions, they do not affect access to geo-restricted services.
Lucy, a user, prefers typing commands to complete tasks on her computer rather than using graphical buttons. Which type of interface is she using?
Console/Command line
Overall explanation
The console or command-line interface requires the typing of textual commands to operate the computer, which fits the user’s preference. The graphical user interface (GUI) involves interaction with graphical icons and visual indicators, which is contrary to the user’s preference for typing commands. The File Manager is a type of utility that helps users manage files and folders, not a command-based interface. While a browser is a type of interface, it does not refer to the textual command-based interface.
Alex, an IT specialist, stumbles upon an unfamiliar error message while installing a new software. He has successfully identified the problem but is not quite sure of the next steps. Which of the following is the BEST approach to this challenge?
Research the error message on the vendor’s knowledge base or on the Internet
Overall explanation
Once the problem is identified, the next logical step would be to delve into the knowledge base or search the Internet. There’s a good chance that someone else might have encountered the same problem and found a solution. Ignoring the error message might lead to more complications. It’s crucial to understand the implications of the error before proceeding. Uninstalling and reinstalling the entire operating system is quite a drastic measure and could potentially result in data loss. It’s better to understand the error message and look for a less severe solution first. While restarting often solves minor issues, it might not be the best strategy when confronted with an error message during installation. Alex needs more information to troubleshoot effectively.
Which SQL command is MOST suitable for altering data already stored in an SQL database?
UPDATE
Overall explanation
The UPDATE command is used to modify existing records in a database. This command is ideally suited for data manipulation. The DELETE command is aimed at removing records from a database, not altering the existing data. The SELECT command is used to retrieve data from a database, it does not modify data. The INSERT command is used to add new records into a database, not for modifying existing ones.
Which of the following notational systems is the base-10 system, using ten unique digits (0-9), and serves as the most commonly used numbering system in everyday life and mathematics?
Decimal
Overall explanation
Decimal is the standard base-10 numbering system that uses ten unique digits from 0-9. It is the most commonly used numbering system in everyday life and mathematics. Binary utilizes a base of 2 and employs only two base digits (0 and 1). It represents the fundamental building blocks of digital computers but is not the most commonly used numbering system in everyday life and mathematics. ASCII (American Standard Code for Information Interchange) is a character encoding standard that represents text in computers, communication, and other devices. It is not a numbering system and thus does not meet the criteria of the question. Hexadecimal is a base-16 numbering system that uses digits from 0-9 and letters A-F to represent values. Though often used in programming and digital communication, it is not the standard numbering system for everyday life and mathematics.
What is a primary goal of implementing RAID 5 (disk striping with parity) in data redundancy?
To enable data recovery in case of a single disk failure without losing the whole array
Overall explanation
RAID 5 uses a combination of striping and parity data across at least three disks to allow for data recovery in case of a single disk failure. RAID 5 does not decrease total storage space. While it allows efficient use of disk space, it also requires extra space for parity information. While RAID 5 can offer some performance benefits, its primary purpose is to provide fault tolerance and allow data recovery in the event of a disk failure. Disk mirroring (creating an exact copy of data) is a feature of RAID 1, not RAID 5.
Which of the following hardware components is primarily responsible for storing data in a computer system?
Hard Disk Drive (HDD)
Overall explanation
The hard drive is primarily used for long-term data storage in a computer. The CPU processes instructions and data, but it does not store data for long term use. The keyboard is an input device. It is used to enter data and command instruction but doesn’t store data. The monitor is an output device that visually displays the processed information. It does not store data.
Which type of database commands enable you to insert or update records and extract information for viewing?
Data Manipulation Language (DML) commands
Overall explanation
Data Manipulation Language (DML) commands. DML commands, such as INSERT, UPDATE, and SELECT, are specifically designed to manipulate data within a database. They allow you to insert new records into a table, update existing records with new values, and extract information from records for viewing through queries. Data Definition Language (DDL) commands are used to define and manage the structure of a database, such as creating tables or altering their structure. DDL commands are not primarily focused on manipulating data records. Data Query Language (DQL) is not a widely used term in database systems. While queries are an essential part of data manipulation, the term DQL is not commonly used to represent a specific category of commands. Data Control Language (DCL) commands are used to manage user permissions and access control within a database. DCL commands are not directly involved in manipulating data records.
What is the critical function of an embedded operating system?
Control hardware in real-time
Overall explanation
The key function of an embedded OS is to control hardware in real time. It is primarily meant to run the device it is installed on. Network connectivity is typically a feature of many operating systems. However, it is not the primary function of an embedded operating system. While some embedded operating systems may have encryption capabilities, it is not their critical function. Embedded operating systems generally do not manage user interfaces, this typically falls under broader OS responsibilities.
Liam, a software engineer at a tech company, is designing a program that will perform calculations related to the speed of sound. The speed of sound in air under standard conditions is 343 meters per second. Which programming recommendation would work BEST for representing the speed of sound in his program?
Use a constant to represent the speed of sound
Overall explanation
Constants are used for values which do not change during execution of the program. Since the speed of sound in air under standard conditions remains consistent, a constant is the best choice. Functions represent actions or operations in a program, not values. While functions can return specific values, they are not meant for storing values. Since the speed of sound is a specific value, using a function to represent it doesn’t make sense in this context. Using an input parameter for an unchanging standard value within the program is not advisable. Input parameters are typically used for values that are provided by the user or can vary during program execution. While a mutable variable could technically work for holding the value, it’s not advised as the speed of sound under standard conditions does not change. Mutable variables are used when the stored value needs to be altered during program execution.
Which device, integrated with technology, regulates and optimizes the warmth of your home environment?
Thermostats
Overall explanation
Thermostats are designed to regulate and optimize temperatures in the user’s home environment. IP cameras are designed for remote viewing and recording. They do not monitor or adjust the overall temperature of the home. Tablets are primarily used for personal or entertainment purposes, but are not designed to regulate and optimize temperatures in a home. Home appliances like ovens, washing machines, etc., do not typically regulate and optimize temperatures in the overall home environment.
What is the role of a row in a Database Management System (DBMS)?
To represent a unique record in a database table
Overall explanation
In a DBMS, a row (also known as a record or tuple) represents a single, implicitly structured data item in a table. Each row in a table represents a set of related data, and every row in the table has the same structure. While having an organized row structure can help manage data effectively, the role of a row isn’t directly tied to improving the performance of database queries. Enhancing query performance is generally addressed via other strategies, such as indexing. Access permissions are not controlled by rows. They are generally managed at the database or table level in a DBMS and don’t relate to the function of a row. Relationships between tables are generally defined by keys and constraints, not by rows.
John lives in a small apartment block and decides to set up a home wireless network using the 802.11g standard. There are many other wireless networks from the neighbors’ apartments. What could be a potential issue for his network?
His network could suffer from interference from other networks
Overall explanation
In a dense apartment setting, multiple networks operating on the same frequency (2.4GHz in the case of 802.11g) could lead to interference, potentially affecting network performance. While 802.11g is faster than 802.11b, in a dense environment with potential interference, the network speed is more likely to be decreased, not increased. While possible, this doesn’t represent a direct issue related to signal interference or 802.11g speed limitations. Networks cannot automatically upgrade from 802.11g to 802.11n. It requires user intervention and compatible hardware.
As part of an initiative to enhance operations, an IT manager plans to introduce pseudocode into their software development processes. What main purposes would the implementation of pseudocode serve in this context?
To provide a high-level representation of an algorithm or process, aiding in understanding and communication
Overall explanation
Pseudocode helps in understanding the essential steps in a function or algorithm without getting tangled in syntax details. It’s an excellent tool for communication between team members who may not be familiar with specific coding languages used in a project. Pseudocode is not actual code and can’t be run or compiled. It is a simple, high-level representation of the logic behind an algorithm. Pseudocode isn’t implemented to increase complexity. Instead, it simplifies the understanding of complex algorithms and functions. Pseudocode is not a substitute for comprehensive documentation. It’s a tool used in planning stages and for illustrating algorithm logic but doesn’t handle details like variable types, error handling, etc.
What does DSL stand for in the context of network connections?
Digital Subscriber Line
Overall explanation
DSL stands for Digital Subscriber Line, which is a type of network connection that uses existing telephone lines to transmit data. Dual Simultaneous Link is not a commonly used term in the context of network connections. Direct Satellite Link refers to a direct connection between two satellite systems, which is not specific to DSL network connections. Digital System Link is not a commonly used term in the context of network connections.
Which of the following user account types has the highest level of privileges and allows the user to perform administrative tasks?
Administrator
verall explanation
An administrator account has the highest level of privileges and allows the user to perform administrative tasks. It has full control over the system, including the ability to install software, modify system settings, and manage user accounts. A power user account is a user account with elevated privileges compared to a standard user, but it does not have full administrative privileges. A guest user account is a restricted account that provides temporary access with limited privileges. It does not have the necessary privileges to perform administrative tasks. A standard user account is a regular user account with limited privileges and cannot perform administrative tasks.
Which cryptographic method is used to confirm that a digital message or document has not been altered, providing proof of data integrity?
Cryptographic Hashes
Overall explanation
Cryptographic hashes are used to verify the integrity of data or a document. By comparing the hash of the received data with the hash of the original data, it can be confirmed whether the data was altered during transmission. PKI is a method of securely exchanging data over networks, it doesn’t directly confirm that a digital message or document has not been altered. Symmetric encryption is primarily used to protect confidentiality of the data, not to confirm that the data has not been altered. Asymmetric encryption is mainly used to secure data in transit and for digital signatures, it’s not specifically used to confirm that a digital message or document has not been altered.
In which of the following scenarios would it be most beneficial to use a flowchart when designing your program’s logic?
When you’re conveying complex program logic to stakeholders who aren’t familiar with programming terminologies
Overall explanation
Flowcharts are ideal for visualizing complex program logic in a simple, easy-to-understand manner. They work well for explaining to stakeholders or team members who may not be well-versed in programming syntax. Flowcharts do not include programming syntax. They are used for visualizing program logic and flow rather than checking for language-specific syntax errors. Stress testing involves testing the limits of the software by subjecting it to heavy loads or tasks. A flowchart, on the other hand, is used for designing and visualizing the logic of the program. Flowcharts are primarily for planning and visualizing the logic of a code and aren’t language-specific. They aren’t typically used for immediate coding.