FC0-U71 Practice Exam 52 — 20 Questions

Question 1

A technician is upgrading a desktop computer's memory. Which component would the technician most likely replace to improve system performance using dual-channel architecture?

Accepted Answer

RAM. Dual-channel memory requires two identical RAM sticks installed in matching slots to increase memory bandwidth. The upgrade involves replacing or adding RAM modules.

Answer

GPU

Answer

Storage drive

Answer

CPU

Question 2

A user's home wireless network is experiencing interference. Which frequency band is more prone to interference from devices like microwaves and cordless phones?

Accepted Answer

2.4 GHz. The 2.4 GHz band is more crowded and prone to interference from common household devices, while 5 GHz offers less interference.

Answer

60 GHz

Answer

5 GHz

Answer

900 MHz

Question 3

An IT technician is setting up a virtualized server environment. The server will host multiple virtual machines for different departments. Which type of hypervisor should the technician install directly on the server hardware to maximize performance and resource efficiency?

Accepted Answer

Type 1 hypervisor. A Type 1 hypervisor runs directly on the hardware without an underlying OS, providing better performance and resource allocation for VMs.

Answer

Containerization platform

Answer

Dual-boot configuration

Answer

Type 2 hypervisor

Question 4

Which of the following is an input device?

Accepted Answer

Keyboard. A keyboard is an input device used to type data into a computer.

Answer

Monitor

Answer

Printer

Answer

Speaker

Question 5

Which of the following best describes a web application?

Accepted Answer

An application that runs within a web browser and processes data on a server. Web applications run in a browser and rely on server-side processing.

Answer

An application that runs only on mobile devices

Answer

An application installed locally that has direct hardware access

Answer

An application that connects services using APIs

Question 6

A developer writes code in C++ and must convert it to machine code before execution. This process is called:

Accepted Answer

Compilation. Compilation translates source code into executable machine code.

Answer

Interpretation

Answer

Linking

Answer

Debugging

Question 7

A developer is writing a program in C++. The source code needs to be translated into machine code before execution. Which process is required?

Accepted Answer

Compilation. Compilation translates source code into machine code that the CPU can execute directly.

Answer

Interpretation

Answer

Linking

Answer

Debugging

Question 8

Which TWO of the following are open-source licenses? (Select 2)

Accepted Answer

MIT License. GPL and MIT are well-known open-source licenses.

Answer

Shareware license

Answer

End-User License Agreement (EULA)

Answer

Commercial license

Question 9

A user wants to install software on a Linux system. Which file types are most commonly used for installing applications?

Accepted Answer

.deb and .rpm. Linux distributions commonly use .deb (Debian-based) and .rpm (Red Hat-based) packages.

Answer

.dmg and .pkg

Answer

.app and .apk

Answer

.exe and .msi

Question 10

A user wants to install a free text editor on their Windows computer. Which file extension is most likely used for the installer?

Accepted Answer

.exe. Windows installers commonly use .exe or .msi. .exe is the most common for executable installers.

Answer

.deb

Answer

.dmg

Answer

.pkg

Question 11

A user saves a document as 'report.docx'. Based on the file extension, what type of file is it?

Accepted Answer

Word processing document. The .docx extension is associated with Microsoft Word documents.

Answer

PDF file

Answer

Presentation

Answer

Spreadsheet

Question 12

A user receives an error 'This application cannot run on your PC' when trying to install a legacy program on Windows 10. What is the most likely cause?

Accepted Answer

Incompatible architecture (32-bit vs 64-bit). The error 'This application cannot run on your PC' typically occurs when a 32-bit legacy program is incompatible with the 64-bit architecture of Windows 10, or vice versa. 64-bit Windows cannot execute 16-bit or certain older 32-bit applications that rely on deprecated system components like NTVDM (NT Virtual DOS Machine) without proper compatibility layers. This is the most likely cause because the error specifically points to an architecture mismatch, not hardware or security issues.

Answer

Corrupted hard drive

Answer

Insufficient RAM

Answer

Missing antivirus

Question 13

Which device converts the signal from an ISP (e.g., cable or fiber) into a digital signal that a home network can use?

Accepted Answer

Modem. A modem modulates/demodulates signals from the ISP to digital data. It is essential for internet connectivity.

Answer

Access point

Answer

Router

Answer

Switch

Question 14

A developer is debugging a program that unexpectedly crashes. Which TWO tools or techniques are commonly used to identify the cause of the crash? (Select the two correct answers.)

Accepted Answer

Breakpoints. Breakpoints allow pausing execution to inspect state, and logging records events to trace execution flow.

Answer

Code compilation

Answer

Refactoring

Answer

Code review

Question 15

Which TWO of the following are core phases of the Software Development Life Cycle (SDLC)?

Accepted Answer

Testing. The SDLC includes phases like planning, analysis, design, implementation, testing, deployment, and maintenance. A flowchart is not an SDLC phase, and debugging is an activity within testing/implementation.

Answer

Algorithm design

Answer

Flowcharting

Answer

Debugging

Question 16

A mobile app needs to display weather data from an online service. The app sends HTTP requests and receives responses in JSON format. This communication is made possible by a set of rules and protocols that allow the app and the service to interact. This set of rules is called a(n):

Accepted Answer

API. An API (Application Programming Interface) defines how software components should interact, often using HTTP and JSON.

Answer

Data structure

Answer

SDLC

Answer

Algorithm

Question 17

A programmer needs to store a collection of key-value pairs where each key is unique and maps to a value. Which data structure is best suited for this purpose?

Accepted Answer

Dictionary. A dictionary (hash map) stores key-value pairs with unique keys for efficient lookup.

Answer

Array

Answer

Stack

Answer

List

Question 18

A developer is writing a program that stores a collection of unique student IDs. The program needs to quickly look up a student by ID and does not require the IDs to be stored in any particular order. Which data structure is most appropriate for this task?

Accepted Answer

Dictionary. A dictionary (hash map) provides fast key-based lookups and automatically handles uniqueness.

Answer

Queue

Answer

Array

Answer

Stack

Question 19

A technician is diagnosing performance issues in a wireless network. Users report intermittent slowdowns. Which of the following is the MOST likely cause?

Accepted Answer

Interference from neighboring networks. Intermittent slowdowns in a wireless network are most commonly caused by co-channel or adjacent-channel interference from neighboring networks. Wi-Fi operates on shared, unlicensed spectrum (2.4 GHz and 5 GHz), and overlapping channels or high utilization from nearby access points force stations to wait for clear channel access, causing latency spikes and throughput drops. WPA2 encryption overhead is negligible for modern hardware, and weak signal or incorrect channel width would typically cause consistent, not intermittent, issues.

Answer

WPA2 encryption overhead

Answer

Weak signal from the access point

Answer

Incorrect channel width setting

Question 20

A database has a table 'Orders' with columns OrderID (primary key), CustomerID, OrderDate, and TotalAmount. Which SQL statement will delete all orders placed before January 1, 2023?

Accepted Answer

DELETE FROM Orders WHERE OrderDate < '2023-01-01'. DELETE FROM table WHERE condition removes rows that satisfy the condition.

Answer

DROP FROM Orders WHERE OrderDate < '2023-01-01'

Answer

DELETE OrderDate < '2023-01-01' FROM Orders

Answer

REMOVE FROM Orders WHERE OrderDate < '2023-01-01'