FC0-U71 Practice Test 31 — 15 Questions

Question 1

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 2

A user at a small design company calls the help desk because their computer is running very slowly when opening large image files. The computer has 8 GB of RAM, a 500 GB HDD, and an integrated graphics card. The technician suspects the slow performance is due to insufficient RAM. Which of the following is the BEST course of action?

Accepted Answer

Add more RAM. The computer has only 8 GB of RAM and an integrated graphics card, which shares system RAM for video memory. When opening large image files, the system runs out of physical RAM and must use the much slower page file on the HDD, causing severe slowdowns. Adding more RAM directly addresses the bottleneck by providing sufficient physical memory to hold the image data and reduce reliance on disk swapping.

Answer

Increase the size of the page file

Answer

Upgrade the HDD to an SSD

Answer

Reduce the image resolution

Question 3

A database administrator adds an index on the 'Email' column of a 'Users' table. What is a likely consequence?

Accepted Answer

Slower update operations on the table. Adding an index on the 'Email' column improves the speed of SELECT queries that filter or sort by that column, but it introduces overhead on write operations. Every time a row is inserted, updated, or deleted, the database must also update the index structure (e.g., a B-tree). This additional work makes UPDATE operations slower, which is why option C is correct.

Answer

Reduced storage space

Answer

Improved query performance for all queries

Answer

Faster inserts on the table

Question 4

Based on the exhibit, which of the following best describes the file type?

Accepted Answer

Image file. The exhibit shows a file named 'screenshot.png'. The .png extension indicates a Portable Network Graphics file, which is a raster image format that uses lossless compression. Therefore, this file is an image file.

Answer

Video file

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Audio file

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Text file

Question 5

A company wants to ensure that data is not lost if a hard drive fails. Which of the following best practices should be implemented?

Accepted Answer

Performing regular backups. Regular backups create copies of data that can be restored if the original is lost due to hard drive failure. This directly addresses data loss by providing a recovery point, unlike other options that focus on security or power protection.

Answer

Using strong passwords

Answer

Regularly updating antivirus software

Answer

Using a surge protector

Question 6

Based on the exhibit, what is the most likely cause of the error?

Accepted Answer

Disk error. The exhibit shows a 'Disk Boot Failure' or similar error, which indicates the system cannot find a valid boot sector on the hard drive. This is most commonly caused by a disk error, such as a corrupted master boot record (MBR), bad sectors, or a disconnected data cable. Option D is correct because the error message directly points to a storage device issue, not a network, power, or memory problem.

Answer

Network outage

Answer

Power supply failure

Answer

Bad memory stick

Question 7

An IT manager is evaluating a cloud storage service for backup of critical company data. The manager is concerned about data security and availability. The service offers encryption at rest and in transit, 99.9% uptime SLA, and geo-redundancy. However, the service uses multi-tenancy. Which of the following is a potential concern the manager should address?

Accepted Answer

The data might be accessible by other tenants. The primary concern with multi-tenancy in a cloud storage service is the risk of data isolation failure, where a vulnerability or misconfiguration could allow one tenant to access another tenant's data. Even with strong encryption at rest and in transit, the data must be decrypted for processing, and if the hypervisor or storage layer has a flaw, other tenants could potentially read the decrypted data. This is a well-known security risk in shared infrastructure models like IaaS and PaaS.

Answer

The uptime SLA is not sufficient

Answer

The encryption might slow down data transfers

Answer

The geo-redundancy might cause latency

Question 8

A user receives an error message indicating 'insufficient memory' when opening several applications. Which action will most likely resolve the issue?

Accepted Answer

Install more RAM. The error message 'insufficient memory' indicates that the system has exhausted its physical RAM capacity while trying to load multiple applications. Installing more RAM directly increases the amount of physical memory available, allowing the operating system to keep more application data in memory without resorting to slower paging. This is the most effective long-term solution for resolving memory exhaustion caused by running several applications simultaneously.

Answer

Clear the browser cache

Answer

Increase virtual memory

Answer

Defragment the hard drive

Question 9

A small accounting office uses three desktop computers running Windows 10. One computer has become extremely slow over the past week. The user reports that the computer takes a long time to start up and applications are unresponsive. The technician checks Task Manager and sees that physical memory usage is at 95% and the page file is heavily used. The hard drive activity light is solid. The computer has 4GB of RAM and a 1TB HDD with 200GB free. Which course of action should the technician take first to most directly address the performance issue?

Accepted Answer

Upgrade the RAM to at least 8GB. The system has only 4GB of RAM, and physical memory usage is at 95% with heavy page file utilization. This indicates the computer is thrashing — constantly swapping data between RAM and the slow HDD, causing the solid hard drive activity light and unresponsiveness. Adding more RAM (to at least 8GB) directly reduces reliance on the page file, alleviating the bottleneck and addressing the root cause of the performance issue.

Answer

Increase the page file size

Answer

Disable unnecessary startup programs

Answer

Run a full antivirus scan

Question 10

A user reports that their laptop battery drains quickly even when plugged in. What is the most likely cause?

Accepted Answer

The power adapter is not delivering enough voltage. When a laptop battery drains quickly while plugged in, the most likely cause is that the power adapter is not delivering enough voltage or current to simultaneously power the system and charge the battery. This can occur if the adapter is undersized, damaged, or not the original equipment manufacturer (OEM) specification, causing the system to draw power from the battery even when connected to AC power. A faulty battery would typically fail to hold a charge at all, not drain while plugged in.

Answer

The battery is faulty

Answer

The laptop is set to high performance mode

Answer

The CPU is overheating

Question 11

Which TWO of the following are types of cloud computing service models?

Accepted Answer

SaaS. SaaS (Software as a Service) is a cloud computing service model where users access software applications over the internet on a subscription basis, with the provider managing the underlying infrastructure, platform, and application. This model eliminates the need for local installation and maintenance, as seen in services like Google Workspace or Microsoft 365.

Answer

DHCP

Answer

LAN

Answer

VPN

Question 12

A user is trying to access a website but receives a 'DNS server not responding' error. Which of the following is the MOST likely cause?

Accepted Answer

DNS server is unreachable. The 'DNS server not responding' error indicates that the client cannot reach the DNS server to resolve the domain name into an IP address. This is most commonly caused by the DNS server being unreachable due to network connectivity issues, server downtime, or incorrect DNS server configuration. Without DNS resolution, the browser cannot translate the website's URL into an IP address, even if the network and web server are functional.

Answer

DHCP server is down

Answer

Firewall is blocking the website

Answer

Modem is disconnected

Question 13

A user wants to upgrade their workstation's storage without losing existing data. Which of the following is the BEST method?

Accepted Answer

Clone the existing drive to the new one. Cloning the existing drive to the new one creates an exact bit-for-bit copy of the original drive, including the operating system, applications, settings, and all data. This allows the user to simply swap the drives and boot normally without any data loss or reinstallation. It is the most direct method that preserves the existing environment intact.

Answer

Perform a clean installation on the new drive

Answer

Back up data to external drive, then restore

Answer

Set up a RAID 1 array

Question 14

A user's laptop battery no longer holds a charge and the laptop only works when plugged in. Which component should be replaced?

Accepted Answer

Battery. The battery is the component that stores electrical charge to power the laptop when unplugged. If it no longer holds a charge, the laptop will only operate when connected to the power adapter, indicating the battery has reached the end of its rechargeable life cycle and must be replaced.

Answer

RAM

Answer

Hard drive

Answer

Power adapter

Question 15

A database administrator needs to ensure that a transaction either fully completes or is fully rolled back. Which database property guarantees this?

Accepted Answer

Atomicity. Atomicity ensures that a transaction is treated as a single, indivisible unit of work: either all of its operations are committed successfully, or none are applied, and the database is rolled back to its previous state. This property directly guarantees the 'all or nothing' behavior required by the database administrator. In SQL databases, atomicity is typically enforced through transaction control statements like BEGIN TRANSACTION, COMMIT, and ROLLBACK, with the database engine managing undo logs to reverse partial changes if a failure occurs.

Answer

Isolation

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Durability

Answer

Consistency