quizzes: expand all 35 quizzes to 15 questions each

OPS-1 through OPS-10, OS-2, OS-3 went from 5 → 15.
OS-1, OS-4 through OS-11, SEC-1 through SEC-11, TRB-1 through TRB-4 went from 7 → 15.
Questions cover exam-weight scenarios not duplicated from original content.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

quizzes/OS-10-quiz.md

@@ -56,6 +56,62 @@ B. `free -h`
 C. `chmod`  
 D. `pwd`  
 
+8. Which Windows directory contains 64-bit applications on a 64-bit system?
+
+A. `C:\Program Files (x86)`  
+B. `C:\Windows\SysWOW64`  
+C. `C:\Program Files`  
+D. `C:\Users\Public`  
+
+9. A user reports an app works on their home PC but not the work PC that runs Windows Home. The app requires domain features. What is the issue?
+
+A. Insufficient disk space  
+B. The app requires Windows Pro or higher  
+C. The driver is outdated  
+D. The app needs a dedicated graphics card  
+
+10. An application requires .NET Framework 4.8. The PC does not have it. Where can a technician enable this on Windows?
+
+A. Device Manager  
+B. Programs and Features > Turn Windows features on or off  
+C. Quick format  
+D. BitLocker  
+
+11. Which installation method allows multiple PCs to be set up at once over the network from a master image?
+
+A. Manual USB install per machine  
+B. PXE boot with network deployment  
+C. Physical media insert per device  
+D. OEM recovery partition only  
+
+12. Which type of software license is tied to a single machine and typically sold through hardware OEM channels?
+
+A. Site license  
+B. Subscription license  
+C. OEM license  
+D. Open-source license  
+
+13. A technician wants to run a Linux virtual machine inside Windows. Which Windows feature enables this?
+
+A. BitLocker  
+B. EFS  
+C. Hyper-V  
+D. UAC  
+
+14. Which runtime environment is required to run most Java-based applications?
+
+A. .NET Framework  
+B. Visual C++ Redistributable  
+C. JRE (Java Runtime Environment)  
+D. Cygwin  
+
+15. Why should business impact be considered before upgrading a critical application?
+
+A. It changes the MAC address  
+B. It disables DNS automatically  
+C. The upgrade may affect workflows, require downtime, or break dependent processes  
+D. It always removes user accounts  
+
 ## Answer Key For Instructor
 
 1. D
@@ -65,4 +121,12 @@ D. `pwd`
 5. D
 6. C
 7. B
+8. C
+9. B
+10. B
+11. B
+12. C
+13. C
+14. C
+15. C