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Prepare for the CompTIA Tech+ FC0-U71 exam with this free practice test. Randomly generated and customizable, this test allows you to choose the number of questions.
When developing a web application that requires the interaction with a relational database, which method is the BEST for manipulating and retrieving database information while adhering to good security practices?
Employ command-line tools to execute database statements from within the application code.
Utilize a database API with prepared statements and parameterized queries.
Create and exclusively use stored procedures for all interactions from the web application.
Build SQL queries by directly concatenating user inputs to construct dynamic queries.
Using a database API allows an application to communicate with the database server programmatically, offering a secure and standardized method for performing database operations like query execution and data manipulation. It abstracts the complexity and helps prevent SQL injection attacks by using prepared statements and parameterized queries. On the other hand, building SQL queries by directly concatenating user inputs can be prone to SQL injection attacks. Using command-line tools is not practical for a web application because it is not dynamic and can be insecure if proper precautions are not taken. While stored procedures are a secure way to execute pre-defined SQL statements, they are not a direct method of achieving programmatic access from a web application.
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A device in your home network is having connectivity issues. To resolve this, you want to ensure it has a valid IP address. Which of the following is the BEST example of a correctly formatted IPv4 address that the device could be assigned?
256.100.50.25
123.456.78.90
192.168.1.999
192.168.1.1
An IPv4 address consists of four octets separated by dots. Each octet must be a decimal number ranging from 0 to 255. The correct answer follows this format and does not contain numbers outside of this range, unlike the other options provided.
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What is a constant in programming?
A container that can hold multiple values of the same type
A fixed value that the program may not alter during its execution
A type of function that performs an operation
A changeable value that can be modified during the program's execution
A constant is a type of identifier used in programming to represent a value that does not change during the execution of a program. It's important to understand the role of constants to ensure that values that are meant to be immutable are not accidentally altered, leading to potential errors in the program's logic.
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When connecting a monitor to a desktop computer, which option will BEST support an analog video connection?
HDMI connector
DisplayPort connector
VGA connector
Mini DisplayPort connector
VGA (Video Graphics Array) is a standard for connecting monitors to computers that transmits analog signals. HDMI, DisplayPort, and Mini DisplayPort are all newer standards that support digital signals, not analog.
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What number does the binary representation '1010' correspond to in decimal?
10
5
8
12
The binary number '1010' represents the decimal number 10. Each position in a binary number corresponds to a power of 2, starting from the rightmost digit. So, in '1010', the leftmost '1' represents 23 (8), and the second digit '0' represents 22 (0), the third '1' represents 21 (2), and the last '0' represents 20 (0). Adding these together (8 + 0 + 2 + 0) gives us 10. The other options either represent different binary values or do not correspond correctly to '1010'.
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Why is it important to regularly apply software updates to your computer system?
To fix security vulnerabilities and improve system stability
To increase the system's vulnerability to new threats
To consume more system resources and reduce performance
To change the user interface frequently to keep the user engaged
Regularly applying software updates is important because updates often contain patches for security vulnerabilities that have been discovered since the last version was released. If these vulnerabilities are not patched, they could be exploited by malware or hackers, leading to potential breaches of confidentiality, integrity, and availability of data and systems. The correct answer is 'To fix security vulnerabilities and improve system stability', as updates provide both security patches and enhancements for better performance.
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A small law firm requires a solution that permits its staff to access and save client files from any workstation in the office. As a very small business they do not have any centralized servers or a data center. Which device best fits this requirement?
A centralized storage management software on the main office workstation
A modem with file sharing capabilities
A USB storage device shared through one user's workstation
A Network Attached Storage (NAS) device
A Network Attached Storage (NAS) device is specifically designed to connect to a network to provide access to files across multiple users simultaneously without the need for a direct connection to a central computing resource like a workstation or dedicated server. A flash drive is for single-user, local storage; a file server would necessitate a dedicated system; and a modem is a device that facilitates internet connections without providing file storage services.
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In a database, what best describes a record?
A single, uniquely identifiable entry containing one or more values
Comprehensive data types encompassing a single entry
All the data stored within a database
A placeholder for future data within a table
A record in a database represents a single, uniquely identifiable entry that can contain one or more values in fields. It is equivalent to a row in a table within a relational database. Option 'Comprehensive data types encompassing a single entry' is incorrect because it does not accurately represent the idea of a record, which is an entry, not a data type. 'A placeholder for future data' is also incorrect as records contain actual data, not placeholders. 'All data within a database' is not correct because a record is just one entry among potentially many within a database.
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A small business has decided to implement a new server to manage their customer database and other applications. What is the main purpose of this server in the company's network?
To provide a connection between different networks
To host and manage resources for multiple users in a network
To operate as an individual user’s personal computer
To produce physical documents and images
The main purpose of a server in this scenario is to host and manage resources such as databases, applications, and services that clients or users can access over the network. In contrast, a workstation is designed for individual use and cannot serve multiple requests from clients simultaneously. A router connects different networks and does not directly host resources, while a printer is merely a peripheral device for producing physical copies.
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Using the drop statement on a table in a database would remove the table and all of its data indefinitely.
True
False
The drop statement is used in SQL to delete a table and all of its rows permanently from the database. Once a table is dropped, it cannot be recovered unless there is a backup available that can be restored. It is different from delete, which is used to remove specific rows from a table; the structure of the table remains intact with delete.
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An employee at a digital marketing agency is turning off their computer at the end of the day. Which type of memory will retain the company's website analytics reports they were viewing without a power source?
Non-volatile memory
Volatile memory
Cache memory
Virtual memory
Non-volatile memory retains data even when the power is turned off, which is necessary for storing files and documents. In this scenario, the analytics reports would need to be saved on non-volatile memory to ensure they are still available when the computer is turned back on. Volatile memory, such as RAM, would lose all its data once the power supply is interrupted.
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A company's policy requires that all workstations have a full backup of their operating system once a month. As an IT support technician, you are evaluating a backup plan to ensure that in the event of a system crash, the workstation can be restored to its last operational state with minimal data loss. Which of the following is the most important step to ensure adherence to the company’s backup policy?
Reinstall the operating system bi-monthly as a precaution.
Manually start the backup process at the end of every week.
Create a schedule for automatic backups to be performed monthly.
Check that there is enough available storage space on the server every day.
Creating a schedule for automatic backups ensures that the backup process occurs at regular intervals, complying with the company's monthly full backup policy. This reduces the risk of human error from forgetting to perform the backup manually. While verifying the processes and checking available space are also good practices, they do not directly ensure backups are executed as per the policy schedule. Reinstalling the operating system would not be related to the backup process itself but is rather an action taken after a system failure where a backup might be needed.
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Software licensed for single use allows installation on multiple devices for use by one individual at any one time.
True
False
Single-use licenses typically restrict the installation of the software to one machine at a time. This is to prevent multiple instances of the software from being used by different individuals which would violate the terms of the single-use license agreement. The license is 'single use' not in terms of how many individuals can use it, but in relation to how many machines it can be installed on concurrently.
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To maintain the security and integrity of the systems in an office, what is the BEST practice to follow when setting up new workstations?
Enabling the host firewall on every workstation.
Changing default passwords on all devices and accounts.
Manually verifying each patch before installation.
Scheduling regular backups for system data.
Changing default passwords is a fundamental security practice to prevent unauthorized access. Default passwords can often be easily found online and are one of the first things attackers try when attempting to gain access to a system. Enabling firewalls and scheduling regular backups are important security measures but do not directly address the issue of preventing unauthorized access as effectively as changing default passwords. Manual patch verification is a part of maintaining security but is not specifically a measure to secure a new workstation against unauthorized access.
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As part of designing a new inventory management system, a team member is constructing a flow chart to represent the logic. After an inventory count process, which symbol should be used to illustrate the subsequent action of checking whether the count is less than the reorder threshold?
Rectangle for process steps
Parallelogram for input/output
Oval for termination
Diamond for decision
The decision, whether the inventory count is less than the reorder threshold, is represented by a diamond shape in the flow chart, indicating a branching point where different paths can be taken based on a 'Yes' or 'No' answer. The other shapes -- rectangle, parallelogram, and oval -- do not represent decision points.
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