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 33-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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Contents: CS W186 Fall 2018 Midterm 2 Do not turn this page until instructed to start the exam. • You should receive one double-sided answer sheet and a 12-page exam packet. • The midterm has 5 questions, each with multiple parts. • The midterm is worth a total of 61 points. Taking the exam: •
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CS W186 Spring 2020 SQL Part 1 – Basic Queries 1 Database Lingo Relational databases are made up of tables (aka relations). A table has a name (we’ll call this one Person) and looks like this: Tables have rows (aka tuples) and columns (aka attributes). In this example, the columns are name, age, num dogs.
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CS W186 Fall 2018 Midterm 1 • Do not turn this page until instructed to start the exam. • You should receive one double-sided answer sheet and a 12-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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CS W186 Spring 2020 Recovery 1 Motivation In prior modules we discussed the ACID properties of transactions. In this note we will discuss how to make our database resilient to failures. The two ACID properties that we will learn how to enforce in this note are: 2 1. Durability: If a transaction finishes (commits), we
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CS W186 Spring 2020 SQL Part 2 – Joins and Subqueries In our Part 1 note we only looked into querying from one table. Often, however, the data we need to answer a question will be stored in multiple tables. To query from two tables and combine the results we use a join. 1 Cross
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CS W186 Fall 2019 Distributed Transactions 1 Introduction Up until this point, we have always assumed that transactions ran on databases where all of the data existed on one node (machine). This is often the case for databases with lighter workloads, but as demand increases, databases scale out to improve performance by using a Shared
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Contents: CS W186 Fall 2019 Midterm 1 Do not turn this page until instructed to start the exam. • You should receive one double-sided answer sheet and a 14-page exam packet. • The midterm has 5 questions, each with multiple parts, and worth a total of 78 points. Taking the exam: • You have 110
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CS W186 Introduction to Database Systems Spring 2020 Josh Hug, Michael Ball DIS 4 1 Buffer Management (a) Fill in the following tables for the given buffer replacement policies. You have 4 buffer pages, with the access pattern A B C D A F A D G D G E D F Red frame outline
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Contents: CS W186 Fall 2019 Final Do not turn this page until instructed to start the exam. • You should receive one double-sided answer sheet and a 37-page exam packet. • The midterm has 11 questions, each with multiple parts, and worth a total of 153.5 points. Taking the exam: • You have 170 minutes
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