A. Priority Sort B. Priority Queue C. Priority variable D. Priority Period When
ID: 3907905 • Letter: A
Question
A. Priority Sort
B. Priority Queue
C. Priority variable
D. Priority Period
When running, which line in Text 1 detects a timer overrun exception
A. 28
B. 12
C. 31
D. 59
Which line in text 1 sets a variable to tell the state machine to initialize when the program starts running?
A. 53
B.19
C. 74
D. 115
Which line in Text 1 schedular actually calls BL_state machine function
A. 67
B. 37
C. 70
D. 99
The task sheduler in Text 1 determine when each task should be executed on multiple task system which line actually implement the task scheduler?
A. 10-15
B. 44-65
C. 35-41
D.31-34
66. enum BL States BL LedOff, BL Led0n BL State; 67. nt TickFct _BlinkLed (int state) I 68 VARIABLES MUST BE DECLARED STATIC/ 69-/te.g., static int x 03/ 70. Def ine user variables for this state nachine here 71. svitch state) // 2. This code vas aut onat i cally generated using the Riverside Irvine State machine Builder tool 3. Version 2.5 10/18/2012 10:2:14 PST 6·#include "rimsh" case: state = BL-Led0ff; 9. /This code ill be shared betven state nachines.* 10. typedef struct task I case BL Ledoff: int state; state BL LedOn: 12. unsizned lon per i od: 13. unsizned lon elapsedT i ne; 14 int (TickFct) (int); break; case BL Ledon 80 17. task tasks[21: state BL LedOff: 84 re 19. const unsigned char tasksNum = 2; 20. const unsigned long periodBlinkLed = 1500; 21. const unsigned long periodThreeLeds = 500; default: state1 Transitions 23. const unsi gned long tasksPeriodGCD 500; 89. svitch(state) // case BL_Ledoff 25. int TickFct BlinkLed (int state); 26. int TickFct ThreeLeds (int state): BO-0; break; case BLLedon: 28. unsigned char process ineRdyTasks = 0; 29. void TierISR 30 unsi gned chari 31 if (processinRdyTasks) 32 94 default: // break; print f ("Period too short to complete taskstn"); 34. 35. 36 98. // State actions 99. BL State st ate; 100 return state; process i n2RdyTasks=1; for (i = 0; iExplanation / Answer
1. Correct answer is option B because Priority Queue sets the scheduler to execute the task having highest priority.
2. Correct answer is option D because Line 59 indicates that the timer is overrun due to excess time.
3. Correct answer is option B because Line 19 instructs the code to initialize a variable for task number.
4. Correct answer is option A because Line 67 invokes the function for BL states.
5. Correct answer is option D (31-34). It is a task scheduler code which tells that task system to execute a specific code.