CSE 444 Practice Problems. DBMS Architecture. 1. Data Independence. (a) What
is physical data independence? (b) What properties of the relational model ...
CSE 444 Practice Problems. Distributed DBMS. 1. Two-phase Commit. (a) In the
two-phase commit protocol, what happens if the coordinator sends PREPARE ...
CSE 444 Practice Problems. Query Optimization. 1. Query Optimization. Given
the following SQL query: Student (sid, name, age, address). Book(bid, title, author
).
CSE 444 Practice Problems. Parallel DBMSs and MapReduce. 1. Parallel Data
Processing Algorithms. (a) Describe how to compute the equi-join of two ...
Dec 17, 2009 ... SQL (24 points, 6 each part) You've been hired to work on a web site that ... (b)
Write a SQL query that returns the number of reviewers in each ...
CSE 581 Introduction to DBMS. Summary notes on Chapter 6: Database design
and the E-R Model. The focus of this chapter is on the entity-relationship data ...
Database Systems: The Complete Book,. Hector Garcia-Molina,. Jeffrey Ullman,.
Jennifer Widom. Most important: COME TO CLASS ! ASK QUESTIONS !
Computer Organization and Design, 4th Edition, ... Review: Major Components of
a Computer ..... Solution: increase block size (increases miss penalty; very.
logging, i.e. the collection of protocol data recording which transactions have
been executed and which changes have been performed by them. DBMS.
Storage Manager. Read Chaper 1 of Atzeni et al. BD: Architetture e linee di
evoluzione. Some slides by Avi Silberschatz, some by Atzeni et al. DBMS.
Logging and recovery ensure that failures are masked to the users of transaction-based data management systems by providing automatic treatment for different ...
Fall 07. CSE4201. CSE 4201 ... 2. Fall 07. CSE4201. MIPS Instruction set. • 32-bit
fixed format instruction (3 formats). • 32 32-bit GPR .... xor r10,r1,r11. Reg. ALU.
Chem 245. Practice Problems. Selected practice problems from the ends of the
chapters in Miessler, Fischer & Tarr, 5th edition. Also note the in-chapter ...
The other problems are suggested practice problems from the textbook, with ....
are for categorical data (binomial test, z-test or χ2 test) and problems from ...
Practice Problems 13. Chapter 7. CHE 151. Graham/07. 1.) A laser emits light of
frequency 4.74 x 10. 14 sec. -1 . What is the wavelength of the light in nm?
It is my great pleasure to present this laboratory manual for THIRD YEAR ...
practical/Lab Sessions related Database Management System covering various.
1. IT420: Database Management and. Organization. PHP and MySQL. (Chapter
11 – PHP and MySQL. Web Development). Last Time: PHP. ▫ Arrays.
Part 2: Monohybrid Crosses. 1. In minks, coat color is controlled by a single gene.
The allele for a brown (B) coat is dominant to the allele for silverblue (b) coats.
Feb 25, 2013 - C is the high temperature reservoir for the heat pump. ... You are asked to design a solar powered heat e
Feb 25, 2013 - You are asked to design a solar powered heat engine to produce 100 kW of work. ... A system executes a po
2015 Practice Programming Problems 6 2. The diameter of a set of points in the plane is the maximum distance between any two of them. Write a program that, given the ...
ECN 221 - Practice Problem Answers for Units 6 & 7. 1. a. You can only ... For
workers 1-5, you need more information to know if you will hire them. Specifically
...
This booklet contains some trivial practice problems that you are free to use as
you ... In Java, the class containing the main program for problem N must be.
CSE 444 Practice Problems. DBMS Architecture. 1. Data Independence. (a) What
is physical data independence? Solution: Physical data independence is a ...
CSE 444 Practice Problems DBMS Architecture
1. Data Independence (a) What is physical data independence? Solution: Physical data independence is a property of a DBMS that ensures decoupling between the physical layout of data and applications which access it. In other words, with physical independence, applications are insulated from changes in physical storage details: changes in how the data is stored do not cause application changes.
(b) What properties of the relational model facilitate physical data independence? Solution: Declarative query language or set-at-a-time query language.
1
(c) What is logical data independence? Solution: Logical data independence is a property of a DBMS that ensures decoupling between the logical structure of data and applications that operate on it. With this property, changes in the logical data layout like tables, rows, and columns do not require application to be changed.
(d) How can one provide a high level of logical data independence with the relational model? Solution: By defining views.
2
2. High-Level DBMS Architecture You should know the key components of a relational DBMS. Please see the lecture notes for an overview. You should also be able to discuss what you implemented in the labs. For example, we could ask you for a high-level description of your buffer manager.
3
3. Data Storage and Indexing You should be able to show what happens when one adds/removes data to/from a B+ Tree. Please see the web quizzes for some good examples.
4
4. Data Storage and Indexing Suppose we have a relation R(a,b,c,d,e) and there are at least 1000 distinct values for each of the attributes. Consider each of the following query workloads, independently of each other. If it is possible to speed it up significantly by adding up to two additional indexes to relation R, specify for each index (1) which attribute or set of attributes form the search key of the index, (2) if the index should be clustered or unclustered, (3) if the index should be a hash-based index or a B+-tree. You may add at most two new indexes. If adding a new index would not make a significant difference, you should say so. Give a brief justification for your answers. (a) 100,000 queries have the form: select * from R where b
