Which of the following is the fundamental data structure of Spark?

Consider the following sequence of PRN’s. 0.49    0.53    0.32    0.63    0.83     0.47     0.03     0.12     0.17     0.23     0.45     0.48 How many runs above and below the mean (0.5) does this sequence have? 

Builtrite Furniture produced revenues of $2,500. It has COGS of $1100 and operating expenses (excluding depreciation) of $600, depreciation of $130, current assets of $210, wages payable of $30 and interest expense of $40. Its tax rate is 21 percent. What is the firm’s net income after taxes?

TRUE or FALSE ? In the Arena Call Center model discussed in class, each server specialized in one product type.

You write 5 MB to a 4x replicated file in HDFS, then later read it back. How much data will be read and written to disks across the cluster?

In Spark, .cache() is a convenience method that calls .persist(…) with what setting?

TRUE or FALSE ? The Arena Call Center model utilized different schedules for each of the servers.

For the Spark SQL query SELECT F, MAX(R) FROM mytable GROUP BY H, F; Over which column(s) will hash values be calculated for partitioning?

Builtrite Corporation has sales of $12,000,000, and a gross profit margin of 30 percent. What are Builtrite’s cost of goods sold?

Why do Type I methanotrophs generally have higher growth yields than Type II methanotrophs?