[Message Deleted]

I) Computer operations (make the answer less than 4 lines for each question) 1. List troubleshooting steps if your Windows is unable to boot. 2. If a PC cannot access Internet （no virus, browser is fine）, how to troubleshoot the network problem? 3. If a PC is installed Linux, describe steps to install Windows on the same PC and test it. II) Computer science (make the answer less than 4 lines for each question) 4. How to calculate the execution time of a simple instruction “a=3” without writing a program? III) Programming 5 How to write code to delete a specific node in a single link list （单链表）that takes O(1) time? That is, the time deleting a node is the same (independent from the length of the list.) Input is a pointer to the node to be deleted. Show your algorithm in pseudo code. Hint: just 3 steps. 6 Class A generates random integers between -100 and 100 at a random frequency between 0 and 2 seconds. Class B decrements a counter when class A generated a negative integer and increments when class A generated a positive integer. Class B's counter needs to be updated in real time as class A generates numbers. Show Java/C++ code when A and B are different threads. IV) Design 7. A video software has 3 buttons: Play, Pause, Step Forward. Initially, only play button is visible. When user clicks play button, it starts to play video and only pause button is visible. Click pause, only play and step forward buttons are visible. Complete the state machine table below with 3 states: Play, Pause, Null. State\Event |Click Play button|Click Pause button|Click Step Forward button Init: Play: Pause: 8. In a simple game, a ball is moving along a line from the left end toward the right end. Show UML class diagram