# TRB-2 Quiz: Mobile OS and App Issues

Take this after studying `notes/TRB-2-mobile-os-app-issues.md`.

Reply with answers like:
`1B 2A 3D 4C 5B 6A 7D`

## Questions

1. A mobile app will not install. What should you check early?

A. Router firmware only  
B. Device storage and OS compatibility  
C. Desktop wallpaper  
D. Printer drivers  

2. A single app keeps crashing. What is a reasonable early step?

A. Clear the app cache or update the app  
B. Replace the monitor  
C. Degauss the phone  
D. Disable all MFA  

3. Bluetooth earbuds will not connect. What should you try?

A. Delete the email account  
B. Quick format storage  
C. Verify pairing mode and forget/re-pair the device  
D. Change DNS records  

4. Screen autorotation does not work. What setting should be checked?

A. Rotation lock  
B. Firewall profile  
C. BitLocker recovery key  
D. Proxy server port  

5. A phone battery drains quickly. Which area should be reviewed?

A. File extensions  
B. Battery usage by app  
C. Browser certificate chain only  
D. Monitor refresh rate  

6. An OS update fails repeatedly. What should be checked?

A. Available storage and network connection  
B. Printer toner level  
C. VGA cable type  
D. Desktop icon size  

7. Which approach is best before factory resetting a phone?

A. Ignore the issue  
B. Root the device  
C. Disable all updates forever  
D. Try low-risk fixes and verify backup status  

8. A user cannot connect to Wi-Fi on their phone even though the password is correct. What should be tried first?

A. Replace the battery  
B. Forget the network and reconnect  
C. Disable MDM  
D. Factory reset immediately  

9. A mobile app shows a "No internet connection" error while other apps work fine. What should be checked?

A. App-specific network permissions  
B. Replace the SIM card  
C. Disable Bluetooth  
D. Reformat the storage  

10. A phone's touchscreen does not respond to touch in a small area. What is the likely cause?

A. Low battery  
B. Screen rotation lock  
C. Physical damage or screen digitizer failure  
D. DNS failure  

11. An app freezes but the rest of the phone works. What is the best first step?

A. Factory reset  
B. Force close the app and reopen it  
C. Update the OS immediately  
D. Remove the battery  

12. Notifications are not appearing for an app. What should be checked?

A. Screen brightness  
B. App notification permissions and Do Not Disturb settings  
C. Storage capacity only  
D. SIM card PIN  

13. A mobile device is very slow after an OS update. What is a reasonable first step?

A. Factory reset immediately without backup  
B. Restart the device; if still slow, check storage and running apps  
C. Downgrade the OS using a third-party tool  
D. Disable all apps permanently  

14. A user reports their phone keeps dropping calls in the same location. What is likely?

A. The microphone is damaged  
B. Poor cellular signal strength in that area  
C. The screen is cracked  
D. Low Wi-Fi bandwidth  

15. An app requires iOS 17 but the phone runs iOS 15 and cannot be updated. What should be communicated to the user?

A. Force install the app anyway  
B. The device does not meet the app's minimum OS requirements  
C. Jailbreak the device to bypass the requirement  
D. The app will install but features will be limited  

## Answer Key For Instructor

1. B
2. A
3. C
4. A
5. B
6. A
7. D
8. B
9. A
10. C
11. B
12. B
13. B
14. B
15. B