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Author Archives: Anonymous

What does the Catalyst optimizer do in Spark SQL?

What does the Catalyst optimizer do in Spark SQL?

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In MapReduce, what happens during the Shuffle phase?

In MapReduce, what happens during the Shuffle phase?

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In SparkML, what is the difference between a Transformer and…

In SparkML, what is the difference between a Transformer and an Estimator?

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Which SparkML component combines multiple feature columns in…

Which SparkML component combines multiple feature columns into a single vector column?

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Delta Lake stores data in the open [blank1] file format whil…

Delta Lake stores data in the open [blank1] file format while adding a metadata layer for ACID transactions. [response_blank1]

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Which of the following is a Spark transformation (lazy opera…

Which of the following is a Spark transformation (lazy operation)?

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In SparkML, a [blank1] chains together multiple transformers…

In SparkML, a [blank1] chains together multiple transformers and estimators into a single workflow. [response_blank1]

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What problem did the ‘Two-System Architecture’ (separate dat…

What problem did the ‘Two-System Architecture’ (separate data lake and warehouse) create?

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Suppose the government imposes a specific tax per unit on a…

Suppose the government imposes a specific tax per unit on a good sold in a perfectly competitive market. Demand for the good is given by QD = 100 – 2 P and supply is given by QS = 4 P.   Where P is the price consumers pay. Assume the tax revenue is rebated lump-sum to consumers. Which of the following statements is most accurate regarding the welfare effects of the tax?

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Mitosis produces cell that are _________ and meiosis produce…

Mitosis produces cell that are _________ and meiosis produces cells that are ___________.

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