Practice test

CompTIA A+ Practice 2

Practice 2 for CompTIA A+ Exam: 25 questions, explained answers, and a review routine.

These questions are for study practice only and are not official exam questions.

Question 1

1

A technician replaces a patch cable with a tested compatible cable and the link immediately becomes stable. Other variables were kept unchanged. What does this support?

Question 2

2

A previously working audio device fails immediately after a driver update. The operating system offers a documented rollback to the previous approved driver. What is a reasonable controlled recovery step?

Question 3

3

A user reports that a laptop is slow. What question is most useful for establishing a reproducible symptom?

Question 4

4

A storage exercise mirrors two equal 2 TB drives in RAID 1 and ignores metadata overhead. What usable capacity does the mirrored volume provide?

Question 5

5

A transfer exercise uses decimal units: 1 MB equals 8 Mb. Ignoring overhead, how long does a 300 MB file take over a constant 100 Mb/s connection?

Question 6

6

During approved remote support, the technician sees a request to grant unattended access beyond the session scope. What is the best action?

Question 7

7

Support receives a suspicious message asking a technician to disable endpoint protection before running an unknown attachment as administrator. What should the technician do?

Question 8

8

A workstation power-budget exercise totals its expected peak load at 420 W and requires at least 25% additional capacity. Which listed supply rating is the smallest that meets that calculation?

Question 9

9

An application sends live audio and tolerates an occasional missing packet but suffers when arrival timing varies widely. What network characteristic describes that timing variation?

Question 10

10

An installer arrives from an unknown download site, while the software vendor offers an authenticated official distribution channel. What is the stronger initial source choice?

Question 11

11

A desktop will not power on, and neither the monitor nor a desk lamp works from the same outlet strip. What common dependency should be checked through the approved safe process?

Question 12

12

A workstation becomes slow only when many large applications are open. Its monitoring tool shows memory nearly full and heavy paging to storage, while CPU use is modest. Which resource is most directly implicated?

Question 13

13

A printer must keep a predictable IP address, and the network administrator wants the central DHCP service to manage that assignment. Which feature most directly meets the request?

Question 14

14

A user can open a shared document but receives an access-denied message when saving changes. The permissions explicitly grant read access only. What explains the behavior?

Question 15

15

An issue affects one browser profile but not a new test profile on the same computer. What area does that comparison most strongly narrow the investigation toward?

Question 16

16

A technician notices that a laptop battery is swollen and lifting the case. What is the appropriate initial response?

Question 17

17

A DNS response maps an internal service name to an old address after a documented migration. The new server works when reached through its approved address. Which data most directly needs review?

Question 18

18

Which description best distinguishes a typical operating-system container from a full virtual machine?

Question 19

19

A technician changes a network setting, updates a driver, and replaces a cable all at once. The problem disappears. What diagnostic weakness remains?

Question 20

20

A phone charges from a USB cable but never appears as a data device. It works with a known-good data cable on the same computer and port. What is the best-supported cable diagnosis?

Question 21

21

A firewall rule explicitly permits outbound web traffic but denies unsolicited inbound connections. A user can browse a site while an external host cannot initiate a new connection to the user computer. What best explains the result?

Question 22

22

A user wants to run an older application on a new operating system. Why should support consult the application vendor compatibility information?

Question 23

23

Before an approved firmware update, what preparation most directly supports recovery if the update fails?

Question 24

24

An inkjet printer produces missing horizontal segments on its built-in nozzle-check pattern. The same pattern appears from multiple computers. Which investigation is most relevant?

Question 25

25

A small office needs to connect several Ethernet devices within one local network. Which device role forwards local Ethernet frames between its connected ports using learned addresses?

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