Quiz-4

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2/15/23, 9 : 46 PM Quiz: Graded Quiz-4 Page 1 of 5 https://canvas.asu.edu/courses/145742/quizzes/1090247/take Graded Quiz-4 Started: Feb 15 at 9:43pm Quiz Instructions 1 pts Question 1 True False In Map/Reduce, each node is strictly bound to be a mapper or reducer. 1 pts Question 2 In the below image, select the correct sequence of actions for HDFS Writes.

2/15/23, 9 : 46 PM Quiz: Graded Quiz-4 Page 2 of 5 https://canvas.asu.edu/courses/145742/quizzes/1090247/take AGBCDEF FGABCDE ABCDEFG FAGBCDE B Client Secondary Replica A Primary Replica Secondary Replica B E A Name Node C Legend: • Control • Data 1 pts Question 3 Recovery Managers Offsite Storage Data Replication Cloud Redundancy HDFS relies on __________ for fault tolerance?

2/15/23, 9 : 46 PM Quiz: Graded Quiz-4 Page 3 of 5 https://canvas.asu.edu/courses/145742/quizzes/1090247/take 1 pts Question 4 Optimized for sequential reads. Controlled by locks Replicated for security Append-only HDFS files share an important property with database journal files. What is this property? 1 pts Question 5 hashcode(key) / NumberOf Mappers hashcode(key) % NumberOfReducers hashcode(key) / NumberOfReducers hashcode(key) % NumberOf Mappers What is the default value for the Partitioner in MapReduce? 1 pts Question 6 Using Map/reduce to implement the join operator, which phase uses the joinkey as its output key?

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2/15/23, 9 : 46 PM Quiz: Graded Quiz-4 Page 4 of 5 https://canvas.asu.edu/courses/145742/quizzes/1090247/take Node Assignment Reduce Data Shuffle Map 1 pts Question 7 Pieces of the dataset Function for computing the dataset Dependency descriptions A lock to indicate write access Which of the following is NOT contained in an RDD? 1 pts Question 8 Uniform grids R-tree grids KDB-tree grids Quad-tree grids Spatial partition suffers from data skew under which partitioning scheme ?

2/15/23, 9 : 46 PM Quiz: Graded Quiz-4 Page 5 of 5 https://canvas.asu.edu/courses/145742/quizzes/1090247/take Quiz saved at 9:46pm 1 pts Question 9 operations, executions transformation, actions morphemes, actions transformations, executions. RDD operations are divided into two groups: ________ which transform RDDs into other RDDs and _______, which return values or exports data. 1 pts Question 10 There is no data sharing In memory data sharing Use Disk for data sharing All of the above Which of the following is true about Spark Submit Quiz

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