FC0-U71 Practice Test 21 — 15 Questions

Question 1

A user wants to synchronize contacts and calendar events between their Android smartphone and tablet. Which service is MOST likely used for this synchronization?

Accepted Answer

Google account sync. Google account sync is the native synchronization service for Android devices. When a user signs into a Google account on an Android smartphone and tablet, contacts and calendar events are automatically synced via Google's cloud services (Google Contacts and Google Calendar). This is the default and most seamless method for keeping data consistent across multiple Android devices.

Answer

Bluetooth pairing

Answer

Microsoft Exchange ActiveSync

Answer

iCloud

Question 2

Which of the following is a characteristic of a worm compared to a virus?

Accepted Answer

A worm can self-replicate without user intervention. A worm is defined by its ability to self-replicate and propagate across networks without requiring user interaction or a host file. It exploits vulnerabilities or uses network shares to spread autonomously, distinguishing it from a virus, which requires a host file and typically user action (like opening an attachment) to execute and replicate.

Answer

A worm is always disguised as legitimate software

Answer

A worm is a type of ransomware

Answer

A worm requires a host file to replicate

Question 3

A user is trying to connect a laptop to a high-definition monitor that supports 4K resolution at 60Hz. Which of the following ports on the laptop will support this video output?

Accepted Answer

HDMI. HDMI supports 4K resolution at 60Hz, making it the correct port for connecting a laptop to a 4K monitor. HDMI 2.0 and later versions specifically support 4K at 60Hz, which is the standard for modern laptops and monitors. The other ports listed are not video output interfaces and cannot carry a display signal to a monitor.

Answer

Ethernet RJ45

Answer

3.5mm audio jack

Answer

USB-A 3.0

Question 4

A server in a data center is running a critical application. The server is connected to a managed switch via two network cables for redundancy (link aggregation). Recently, the server experienced intermittent connectivity issues. The network logs show that every few hours, one of the links goes down and then comes back up within a minute. The other link remains up. The server's team reports no errors in the server logs. What is the most likely cause of this issue?

Accepted Answer

The network cable is poorly terminated. A poorly terminated cable can cause intermittent physical-layer issues such as impedance mismatches or partial breaks, which lead to link flaps (link down/up events) without generating errors in the server's operating system logs. In a link aggregation group (LAG) using LACP or static aggregation, a single faulty cable will cause only that link to drop, while the other link continues to carry traffic, matching the described symptom of one link cycling every few hours.

Answer

The switch's uplink port is faulty

Answer

The switch is experiencing broadcast storms

Answer

The server's network adapter is overheating

Question 5

A database administrator notices that queries on a large table are taking too long to execute. Which action would most likely improve performance?

Accepted Answer

Create an index on frequently queried columns.. Creating an index on frequently queried columns allows the database to locate rows using a B-tree or hash structure, reducing the need for full table scans. This directly addresses slow query performance on large tables by minimizing disk I/O and CPU overhead during SELECT operations.

Answer

Add more columns to the table.

Answer

Denormalize the table.

Answer

Perform further normalization.

Question 6

In a relational database, which constraint ensures that a foreign key value matches an existing primary key value in the referenced table?

Accepted Answer

Foreign key constraint. A foreign key constraint enforces referential integrity by requiring that any value in the foreign key column(s) must either match a primary key or unique key value in the referenced table, or be NULL. This ensures that relationships between tables remain consistent and prevents orphaned records. The constraint is defined on the child table and references the parent table's primary key (or a unique key).

Answer

Primary key constraint

Answer

Check constraint

Answer

Unique constraint

Question 7

Which of the following best describes the role of an operating system?

Accepted Answer

It manages hardware resources and provides a platform for applications.. The operating system (OS) is the core software layer that sits between hardware and applications. It allocates CPU time, memory, storage, and I/O devices to processes, and exposes system calls and APIs that applications use to run without directly manipulating hardware. This resource management and abstraction role is the defining function of an OS, making option A the correct description.

Answer

It runs only one application at a time.

Answer

It is responsible for data backup and recovery.

Answer

It connects the computer to the internet.

Question 8

Which TWO of the following are examples of input devices? (Select TWO).

Accepted Answer

Mouse. The mouse and keyboard are classic examples of input devices because they allow users to send data and commands to a computer. A mouse translates physical movement and button clicks into cursor control signals, while a keyboard converts key presses into electrical signals that the system interprets as characters or commands. Both operate by sending input to the computer for processing, not by receiving or outputting data.

Answer

Printer

Answer

Speaker

Answer

Monitor

Question 9

Which of the following license types allows users to view, modify, and distribute the source code, as long as they include the original copyright notice and any modifications are also open source?

Accepted Answer

GNU General Public License (GPL). The GNU General Public License (GPL) is a copyleft license that explicitly requires derivative works to be distributed under the same GPL terms, meaning any modifications must also be open source. It also mandates preservation of the original copyright notice. This copyleft requirement is the defining characteristic that matches the question's condition that 'modifications are also open source.'

Answer

Shareware

Answer

Apache License 2.0

Answer

MIT License

Question 10

A user is troubleshooting an issue with a web application that is only accessible through a browser. The user notes that the application runs slowly. Which component is most likely responsible for processing the application's server-side logic?

Accepted Answer

Web server. In a three-tier web application, the web server (e.g., Apache, Nginx, IIS) is the component that executes server-side logic — processing requests, running application code, and querying back-end resources before returning HTML/JSON to the browser. The browser only renders the response and runs client-side JavaScript; it does not execute server-side code. Therefore the web server is the component most likely responsible for the slow server-side processing.

Answer

Web browser

Answer

Local firewall

Answer

Operating system

Question 11

A user receives an email that appears to be from their bank, asking them to click a link and verify their account. The email contains urgent language and a generic greeting. Which type of security threat is this?

Accepted Answer

Phishing. Phishing is a social engineering attack where attackers send deceptive emails to steal credentials. The generic greeting and urgent language are common signs.

Answer

Smishing

Answer

Spear phishing

Answer

Vishing

Question 12

Which of the following is a characteristic of a worm in the context of malware?

Accepted Answer

It self-replicates without needing a host file. A worm is a standalone malware that replicates itself to spread to other computers without needing to attach to a host file, often exploiting network vulnerabilities.

Answer

It disguises itself as legitimate software

Answer

It encrypts files and demands a ransom

Answer

It requires a host file to spread

Question 13

A small business wants to connect its computers to share files and printers. Which of the following network devices would BEST facilitate this?

Accepted Answer

Switch. A switch operates at Layer 2 of the OSI model and uses MAC addresses to forward frames only to the specific port where the destination device is connected. This creates a dedicated, collision-free path between the computers, making it the ideal device for connecting multiple computers within a local area network (LAN) to share files and printers efficiently.

Answer

Router

Answer

Hub

Answer

Modem

Question 14

A software tester writes tests to verify that individual functions in a module return correct results when given specific inputs. These tests are isolated from other parts of the system. Which type of testing is being performed?

Accepted Answer

Unit testing. Unit testing is the correct answer because it involves testing individual functions or methods in isolation to verify they return correct outputs for specific inputs. This aligns directly with the scenario where the tester is focusing on single modules without dependencies on other system parts, which is the core definition of unit testing in software development.

Answer

Integration testing

Answer

User acceptance testing

Answer

System testing

Question 15

Which of the following storage technologies uses spinning platters and a mechanical arm to read and write data?

Accepted Answer

HDD. The correct answer is HDD (Hard Disk Drive). HDDs are electromechanical storage devices that use rapidly spinning magnetic platters and a moving read/write head mounted on an actuator arm to access data. This mechanical design is the defining characteristic of HDDs, distinguishing them from solid-state and volatile memory technologies.

Answer

RAM

Answer

Firmware

Answer

SSD