Q. What are the two crucial aspects that enable parallel execution in database systems?

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Q. What does the optimizer in a parallel DBMS translate SQL commands into?

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Q. In a parallel DBMS, when does the filter subquery in a SQL command get performed in parallel?

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Q. What is the final step required in a parallel DBMS after performing a hash join and calculating preliminary aggregate functions?

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Q. Why is there a need for interfaces between MapReduce systems and DBMSs?

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Q. What is the result of integrating MapReduce and DBMSs for complex analytical problems?

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Q. What is the primary purpose of the MapReduce system in the context of interfacing with DBMSs?

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Q. What is the primary focus of machine learning?

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Q. Which type of learning is often used in knowledge discovery, data mining, and machine learning?

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Q. What are the two main goals of the learning from data process?

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Q. In supervised learning, how are the classes determined?

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Q. What is one of the basic tasks in supervised learning?

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Q. What distinguishes unsupervised learning from supervised learning?

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Q. What is a common goal of unsupervised learning?

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Q. Why is machine learning well-suited for handling Big Data?

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Q. What types of tasks are strengths of machine learning algorithms in the context of Big Data?

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Q. What is the primary purpose of decision tree learning?

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Q. How are decision tree algorithms like ID3 and C4.5 used in the learning process?

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Q. What measures are used to determine the selection of attributes for splitting in decision trees?

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Q. What happens when an instance is incorrectly classified in the decision tree learning process?

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