Lock/Barriers Consider a cache-coherent multiprocessor.  Assume the multiprocessor offers an atomic decrement operation on a shared variable.  You decide to provide a barrier synchronization primitive in your OS that is based on the following count-based algorithm:  int count = N; // initialized to the number of participating threads barrier()0. {1. decrement(count);2. if (count == 0)3. count = N;    // last processor to arrive 4. else5. while (count > 0);  // wait for last process 6. while (count!= N);//to not leave barrier before count reset7. } Identify any two race conditions that will lead to the algorithm not working as written above. 

Potpourri Answer True/False and provide justification for your response: Cache coherence is required to support a sequentially consistent memory model. 

　 Rating 1 Rating 2 Rating 3 Rating 4 Rating 5 Male 12 14 29 69 26 Female 0 4 7 23 16 According to the contingency table, how many females gave a satisfaction rating of 4?

From the bar chart of satisfaction ratings, which rating was most frequent?

Looking at the scatterplot of income vs. purchase, what type of relationship is observed?

　 Rating 1 Rating 2 Rating 3 Rating 4 Rating 5 Male 12 14 29 69 26 Female 0 4 7 23 16 If we calculate the proportion of males who gave a rating of 4 out of all males, what is the result (rounded to a whole percentage)?

Explain your reason for your answer to the previous question.

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Veronica absolutely loves skittles. It’s her favorite candy in the whole wide world! However, Veronica knows skittles have a lot of sugar in them and her doctor recently told her she needs to cut back on sweets. Since Veronica knows she can’t imagine life without skittles, she has decided that instead of eating a full shareable size bag a day, she will work on decreasing her portion size. Use the following nutritional information for SKITTLES Original Fruit Candy Share Size Bag (4 oz) to answer the following question: How many grams of total sugar does Veronica consume if she chooses to eat half the bag instead?  Serving Size: 1 oz (28g/about 27 pieces) Servings Per Container: 4 Calories per serving: 110 Total Sugars per serving: 21 g

When reading a nutrition label, a %DV of 25% for fiber would be considered