CS W186 Spring 2020 Sorting In CS61B, you learned about many different sorting algorithms. Why are we learning yet another new one in this class? All of the traditional sorting algorithms (i.e. quick sort, insertion sort, etc.) rely on us being able to store all of the data in memory. This is a luxury we […]
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CS W186 Spring 2020 Query Optimization 1 Introduction When we covered SQL, we gave you a helpful mental model for how queries are executed. First you get all the rows in the FROM clause, then you filter out columns you don’t need in the WHERE clause, and so on. This was useful because it guarantees
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CS 186/286 Fall 2017 Final Exam • Do not turn this page until instructed to start the exam. • You should receive 1 answer sheet and a 25-page exam packet. • All answers should be written on the answer sheet. The exam packet will be collected but not graded. • You have 3 hours to
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CS W186 Introduction to Database Systems Spring 2020 Josh Hug, Michael Ball DIS 2 1 True and False Solution: (a) When querying for a 16 byte record, exactly 16 bytes of data is read from disk. False, an entire page of data is read from disk. (b) Writing to an SSD drive is more costly
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CS 186/286 Spring 2018 Midterm 1 • Do not turn this page until instructed to start the exam. • You should receive 1 single-sided answer sheet and a 18-page exam packet. • All answers should be written on the answer sheet. The exam packet will be collected but not graded. • You have 80 minutes
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Contents: CS W186 Spring 2019 Midterm 1 Do not turn this page until instructed to start the exam. • You should receive one double-sided answer sheet and a 11-page exam packet. • The midterm has 5 questions, each with multiple parts. • The midterm is worth a total of 60 points. Taking the exam: •
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Contents: CS W186 Fall 2018 Final Do not turn this page until instructed to start the exam. • You should receive one double-sided answer sheet and a 21-page exam packet. • The final has 10 questions, each with multiple parts. • The final is worth a total of 126.5 points. Taking the exam: • You
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CS W186 Introduction to Database Systems Spring 2020 Josh Hug, Michael Ball DIS 2 1 True and False (a) When querying for a 16 byte record, exactly 16 bytes of data is read from disk. (b) Writing to an SSD drive is more costly than reading from an SSD drive. (c) In a heap file,
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CS W186 Spring 2020 Parallel Query Processing 1 Introduction Up until this point we have assumed that our database is running on a single computer. For modern applications that deal with millions of requests over terabytes of data it would be impossible for one computer to quickly respond to all of those requests. We need
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Contents: CS W186 Spring 2019 Midterm 2 Do not turn this page until instructed to start the exam. • You should receive one double-sided answer sheet and a 11-page exam packet. • The midterm has 6 questions, each with multiple parts. • The midterm is worth a total of 76 points. Taking the exam: •
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