Fixed #2637 (#2712)

* Fixed variable names in Q9 for OOP quiz

* Fixed dictation and correct answer of Q34 of OOP

Inside the body of a static constructor, only static members of a class are accessible.

* Fixed Q35 of OOP quiz dictation

* Update object-oriented-programming-quiz.md

* Update object-oriented-programming-quiz.md

* Updated Q62 of OOP quiz

The choices are a copy of Q61 and are thoroughly irrelevant to Q62

* Fixed dictation of a choice in Q65 of OOP quiz

* Added two new questions (Q66, Q67) for OOP Quiz

* Fixed #2536

First image was duplicated

* Fixed #2637

linux/linux-assesment.md

@@ -559,3 +559,10 @@ isse letter drift problem, mentionned here https://access.redhat.com/discussions
 - [ ] aarray
 - [ ] array -a
 - [x] declare -A
+
+#### Q69. What tool Should you use to replace a physical volum in LVM??
+
+- [ ] lvcopy
+- [ ] tar
+- [x] pvmove
+- [ ] cp