FC0-U61 Practice Test 5 — 25 Questions

Question 1

A small office has five computers connected to a switch, which is connected to a router that provides internet access. The office uses a single printer connected to one computer and shared over the network. The router has built-in DHCP and assigns IP addresses in the 192.168.0.0/24 range. Recently, the office manager added a wireless access point (WAP) to allow guests to access the internet. The WAP is connected to the switch and configured with its own DHCP server handing out addresses in the 192.168.1.0/24 range. The manager notices that some office computers are unable to access the shared printer, while others can. The computers that cannot access the printer have IP addresses in the 192.168.1.0/24 range. The printer's IP address is 192.168.0.50. What is the most likely cause of the issue?

Accepted Answer

The computers with IP addresses in the 192.168.1.0/24 range are on a different subnet than the printer.. The computers with IP addresses in the 192.168.1.0/24 range are on a different subnet than the printer, which has an IP address of 192.168.0.50. Without a router configured to route traffic between these two subnets, devices on the 192.168.1.0/24 network cannot communicate with devices on the 192.168.0.0/24 network. Since the WAP is acting as a separate DHCP server and is not routing between the subnets, the printer remains unreachable from the guest network.

Answer

The WAP's DHCP server is malfunctioning.

Answer

The switch port for the printer is faulty.

Answer

The printer is not powered on.

Question 2

Which THREE of the following are valid database integrity constraints?

Accepted Answer

UNIQUE. A UNIQUE constraint ensures that all values in a column or a set of columns are distinct from one another, preventing duplicate entries. This is a standard SQL integrity constraint that enforces data uniqueness at the table level, and it is correctly listed as a valid database integrity constraint.

Answer

INDEX

Answer

CONDITION

Question 3

A small business owner wants to protect sensitive customer data stored on a laptop that is frequently used on public Wi-Fi networks. The owner is considering implementing a security control that ensures data remains confidential even if the laptop is stolen. Which of the following is the BEST control for this scenario?

Accepted Answer

Implement full-disk encryption. Full-disk encryption (FDE) protects data at rest by encrypting the entire storage volume, typically using AES-128 or AES-256. Even if the laptop is stolen, the encrypted data remains unreadable without the decryption key, ensuring confidentiality. This directly addresses the requirement for data protection after physical theft.

Answer

Use a VPN when connected to public Wi-Fi

Answer

Install antivirus software

Answer

Require a strong password for user login

Question 4

A developer is troubleshooting an issue where a user can list the objects in an S3 bucket but cannot download any of them. Based on the exhibit, what is the most likely cause?

Accepted Answer

The Deny statement on s3:GetObject explicitly denies object retrieval.. The exhibit shows an explicit Deny statement for s3:GetObject, which overrides any Allow statements due to AWS IAM policy evaluation logic. Even if the user has s3:ListBucket permission to list objects, the Deny on s3:GetObject prevents downloading any objects. This is the most likely cause because AWS Deny statements are absolute and cannot be overridden by Allow statements.

Answer

The user lacks permissions to list the bucket.

Answer

The Allow statement on s3:ListBucket also allows downloads.

Answer

The policy is malformed and causes an error.

Question 5

A company needs to store customer orders with items and quantities. The database currently has a table 'Customers' and a table 'Products'. Which of the following is the best way to represent the many-to-many relationship between orders and products?

Accepted Answer

Create an Order_Items table with foreign keys to Orders and Products, plus a Quantity column.. Option B is correct because it creates a junction table (Order_Items) that resolves the many-to-many relationship between Orders and Products. The Order_Items table includes foreign keys referencing both the Orders and Products tables, plus a Quantity column to store the number of each product in an order, which is the standard normalized relational database design.

Answer

Create a single table containing all customer, order, and product information.

Answer

Store a JSON list of product IDs in an OrderProducts column in the Orders table.

Answer

Add columns Product1, Product2, Product3 to the Orders table.

Question 6

Refer to the exhibit. What is the most likely cause of the application crash?

Accepted Answer

A necessary system runtime library (msvcrt.dll) is corrupted or missing.. The error message indicates that the application cannot find the entry point for a function in msvcrt.dll, which is a critical system runtime library for C/C++ applications. This typically occurs when the DLL is corrupted, missing, or of an incorrect version, preventing the application from loading necessary functions. Since the error specifically references msvcrt.dll, the most likely cause is that this runtime library is corrupted or missing.

Answer

The computer does not have enough RAM to run the application.

Answer

The antivirus software is blocking the application from executing.

Answer

The application inventory.exe is incompatible with the operating system.

Question 7

An IT department is planning a new server deployment. They need to ensure that if one server fails, another can take over with minimal downtime. Which concept describes this requirement?

Accepted Answer

Fault tolerance. The requirement describes a system where a secondary server automatically takes over with minimal downtime upon failure of the primary server. This is the definition of fault tolerance, which uses redundant components (e.g., dual power supplies, RAID, or clustered servers) to ensure continuous operation without interruption. High availability (option C) is related but focuses on maximizing uptime through redundancy and failover, whereas fault tolerance specifically aims for zero or near-zero downtime by masking failures completely.

Answer

Disaster recovery

Answer

Scalability

Answer

High availability

Question 8

A technician runs the commands shown in the exhibit. Based on the output, which of the following can the technician conclude?

Accepted Answer

The computer can communicate on the local network. The output shows the computer has an IP address of 192.168.1.10 and a subnet mask of 255.255.255.0, which means it is on the 192.168.1.0/24 local network. The fact that the computer has a valid IP address and subnet mask configured indicates it can communicate with other devices on the same local network segment, as no gateway or external connectivity is required for local link-layer communication.

Answer

The computer has internet access

Answer

The DNS server is reachable

Answer

The default gateway is not configured

Question 9

A technician is troubleshooting a slow network and suspects a loop. Which command-line tool should the technician use to identify the loop?

Accepted Answer

ping -t 1 192.168.1.1. Option C is correct because the `ping -t 1 192.168.1.1` command sends ICMP echo requests with a Time-to-Live (TTL) value of 1. If a network loop exists, the packet will be forwarded in a cycle, and each hop decrements the TTL. When the TTL reaches 0, the router discards the packet and sends an ICMP Time Exceeded message back. By observing repeated Time Exceeded responses from the same or multiple IPs, the technician can identify the loop's location.

Answer

tracert example.com

Answer

netstat -a

Answer

nslookup example.com

Question 10

A user is trying to install a new printer driver on a Windows 10 workstation but receives an error stating the driver is not signed. Which security concept is most directly involved?

Accepted Answer

Authentication. Driver signing is a mechanism that verifies the publisher's identity and ensures the driver has not been tampered with. This directly relates to integrity, not authentication. Authentication is about verifying identity (e.g., user login), but the error here is about the driver's digital signature, which protects integrity. Option D is incorrect because authentication is not the primary concept involved.

Answer

Availability

Answer

Integrity

Answer

Confidentiality

Question 11

A network technician is troubleshooting a server that is not reachable from the LAN. The server has a static IP address of 192.168.1.100/24 and a default gateway of 192.168.1.1. The technician pings the gateway successfully but cannot ping the server from another workstation on the same subnet. Which TWO steps should the technician take to resolve the issue?

Accepted Answer

Verify the network adapter settings on the server. Option C is correct because the technician can ping the gateway from the server, confirming Layer 3 connectivity to the router, but cannot ping the server from another workstation on the same subnet. This points to a local configuration issue on the server itself, such as a misconfigured subnet mask, a disabled network adapter, or incorrect IP settings. Verifying the network adapter settings ensures the server's IP address, subnet mask, and default gateway are correctly applied and the adapter is enabled.

Answer

Clear the ARP cache on the server

Answer

Replace the network cable

Answer

Check DNS resolution for the server

Question 12

A company's database administrator notices that queries against a large customer table are running slowly. The table has millions of rows and is frequently filtered by the 'last_name' column. Which of the following is the BEST way to improve query performance without changing the application code?

Accepted Answer

Create an index on the 'last_name' column.. Creating an index on the 'last_name' column allows the database to locate rows matching filter conditions without scanning the entire table. This dramatically reduces I/O and CPU overhead for queries that filter by last_name, directly addressing the performance bottleneck without requiring any changes to application code.

Answer

Partition the table by row count.

Answer

Increase the database server's RAM.

Answer

Denormalize the table to reduce joins.

Question 13

A user wants to access a website but types the wrong URL. Which technology resolves domain names to IP addresses?

Accepted Answer

DNS. DNS (Domain Name System) is the technology that translates human-readable domain names (like www.example.com) into machine-readable IP addresses (like 192.0.2.1). When a user types a wrong URL, the browser still sends a DNS query to resolve the domain portion of the URL; if the domain is valid but the path is wrong, DNS resolves correctly, but if the domain itself is mistyped, DNS may fail or redirect to a different IP. This resolution is essential for locating the web server on the internet.

Answer

HTTP

Answer

NAT

Answer

DHCP

Question 14

A company stores sensitive data and wants to ensure that if a hard drive is stolen, the data cannot be read. Which security measure should be implemented?

Accepted Answer

Full disk encryption. Full disk encryption (FDE) encrypts the entire contents of a hard drive, including the operating system, applications, and all data, using algorithms such as AES-256. If the drive is stolen, the data remains unreadable without the decryption key or passphrase, even if the drive is physically removed and attached to another system. This directly addresses the requirement of protecting data at rest on a stolen drive.

Answer

RAID 1

Answer

Antivirus software

Answer

Strong passwords

Question 15

Which TWO of the following are appropriate steps when troubleshooting a user's inability to access the internet? (Select TWO.)

Accepted Answer

Check the IP address configuration. Option A is correct because checking the IP address configuration is a fundamental first step in troubleshooting network connectivity. A misconfigured IP address, such as an Automatic Private IP Addressing (APIPA) address in the 169.254.x.x range, indicates that the device failed to obtain a valid IP from a DHCP server, which would prevent internet access. Verifying the IP configuration with commands like `ipconfig` (Windows) or `ifconfig` (Linux/macOS) helps identify if the device has a proper IP, subnet mask, and default gateway.

Answer

Restart the computer

Answer

Replace the network cable

Answer

Power cycle the router

Question 16

A user reports that their printer is not working. The printer is connected via USB to a workstation, and other users can print to the same printer over the network. Which of the following should the technician check FIRST?

Accepted Answer

USB cable connection. Since other users can print to the same printer over the network, the printer itself is operational and reachable. The issue is isolated to the local workstation, making the USB cable connection the most likely point of failure. A loose, damaged, or disconnected USB cable would prevent the workstation from communicating with the printer, so checking the physical connection is the quickest and simplest first step.

Answer

Paper jam in the printer

Answer

Printer driver on the workstation

Answer

Printer sharing settings on the network

Question 17

Which TWO of the following are common Ethernet cable categories used in local area networks?

Accepted Answer

Cat5e. Cat5e and Cat6 are twisted-pair cables commonly used for Ethernet. Coaxial is used for cable TV, HDMI for audio/video, USB for peripherals.

Answer

USB

Answer

Coaxial

Answer

HDMI

Question 18

Which of the following cable types is MOST commonly used for Ethernet networks in an office?

Accepted Answer

Cat5e. Cat5e (Category 5 enhanced) is the most common twisted-pair copper cable used in office Ethernet networks because it supports speeds up to 1 Gbps (1000BASE-T) over distances up to 100 meters, and it is backward-compatible with older 10/100 Mbps standards. Its widespread adoption, low cost, and ease of termination make it the default choice for structured cabling in modern office environments.

Answer

Coaxial

Answer

Fiber optic

Answer

USB

Question 19

A small business purchases a cable modem from the ISP. They need to obtain a public IP address to access the internet. Which method does the cable modem typically use?

Accepted Answer

DHCP. Cable modems typically use DHCP to obtain a public IP address from the ISP. When the modem powers on, it sends a DHCPDISCOVER broadcast, and the ISP's DHCP server responds with an IP address, subnet mask, default gateway, and DNS server information. This is the standard method for dynamically assigning public IP addresses to customer premises equipment (CPE) in cable networks.

Answer

NAT

Answer

Static assignment

Answer

APIPA

Question 20

A technician is installing a new network in a home office. The devices are spaced far apart, and the technician needs to make long runs of cable. Which of the following cable types is BEST suited for this scenario to minimize signal loss?

Accepted Answer

Fiber optic cable. Fiber optic cable uses light pulses to transmit data, which is immune to electromagnetic interference and can carry signals over much longer distances (often kilometers) without significant attenuation. In a home office with long cable runs, fiber optic cable is the best choice to minimize signal loss compared to copper-based cables.

Answer

Cat5e UTP

Answer

Cat6 UTP

Answer

Coaxial cable