Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask DBMS Expert


Home >> DBMS

Answer the following problems.

problem 1) Consider the following schedule and describe which schedules are conflict-equivalent and complete.

S1={R2(z),W2(x),W2(y),C2,W1(x),R1(x),A1, R3(x),R3(z),R3(y),C3}

S2={R3(z),W2(x),W2(y),R1(x),R3(x), R2(z),R3(y),C3,W1(x),C2,C1}

problem 2)a) Simplify the following query and check whether it is semantically correct or not.

Select eno from
ASG where
Resp = “Analyst”
AND NOT ( pno = “p2"
OR DUR = 12 )
AND pno ≠ “p2
AND DUR = 12

b) Given the relation EMP (ENO, ENAME, TITLE)
Let P1 & P2 be the two simple predicates where
P1 : TITLE < “programmer”
 P2 : TITLE > “programmer”

Suppose that char strings has order amongs then based on alphabetical order.

i) Perform the horizontal fragmentation of EMP with respect to P1 & P2

ii) Describe whether the resulting fragmentation emp1& emp2 fulfils the correctness rules of fragmentation or not?

iii) Modify predicates P1 andP2. if needed to satisfy correctness rules.

problem 3) Apply the algorithm INGRES to the following query and show the successive detachment and substitutions by giving mono-relation sub queries generated.

Select ename, sal from EMP, ASG , PROJ, Pay
Where EMP. eno = ASG . eno
AND EMP. title = Pay, title
AND Budget > 200000
OR DUR = 24

problem 4) Define deadlock? How deadlock can be managed?

problem 5) Describe the problems why DBMS bypass OS buffer manager and manage the disk & main memory.

problem 6) Describe the issues of global directory.

problem 7) Describe the process of localization.

problem 8) Which drawbacks of PC2PL are removed by D2PL?

DBMS, Programming

  • Category:- DBMS
  • Reference No.:- M95263

Have any Question? 


Related Questions in DBMS

Design a relational database for a video rental store the

Design a relational database for a video rental store. The store, which rents only DVDs and has no sales other than DVD rentals, has approximately 5,000 customers and approximately 1,200 DVD titles. There are 25 supplier ...

Part aexercise 1 data scienceread the article at

Part A Exercise 1: Data Science Read the article at http://datascience.berkeley.edu/about/what-is-data-science/ and answer the following: What is Data Science? According to IBM estimation, what is the percent of the data ...

Data base 1 hypertensionobjective to determine whether or

Data Base 1: Hypertension Objective: To determine whether or not the community self-management program is effective to promote health and reduce blood pressure level in patients with hypertension Rationale In low-to-midd ...

Realtor database data redundancy and anomaliesbullconduct

Realtor Database: Data Redundancy and Anomalies • Conduct an in-depth examination and analysis of the database, Realtor.accdb. Apply the concepts of database systems that you have learned this week. For example, you may ...

List the different types of locks used by dbms systems and

List the different types of locks used by DBMS systems and explain how they differ from each other. Additionally, suggest the suitable scenario for each of them. 400 to 500 words, at least 4 references with one website r ...

Physical database design assignment query optimisationthis

Physical Database Design Assignment: Query Optimisation This assignment aims to develop your skills optimizing query. It involves identifying the suitable methods for structuring the data and writing the query. First, yo ...

The purpose of the veterinary hospital registration system

The purpose of the Veterinary Hospital Registration system is to handle and record all the information relating to the clients, veterinarians, pets, treatments administered, insurance coverage and appointments (open, clo ...

A quick guide to pivot tables is found at the end of this

A "Quick Guide to Pivot Tables" is found at the end of this document. Review it BEFORE beginning the questions. The data for this exercise (structured as a flat file) can be found in an Excel workbook located on Blackboa ...

Part 1identify and explain the default logins or user

Part 1 Identify and explain the default logins or user accounts for one of the database vendors discussed in the chapter. Part 2. Case Project 6-1: Database Password Policies, page 199 Create and document a written passw ...

The following assignment is based on the database

The following assignment is based on the database environment designed in the Week Three Individual Assignment. Your database project must meet the following requirements: • Create a database using professional principle ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

A cola-dispensing machine is set to dispense 9 ounces of

A cola-dispensing machine is set to dispense 9 ounces of cola per cup, with a standard deviation of 1.0 ounce. The manuf

What is marketingbullwhat is marketing think back to your

What is Marketing? • "What is marketing"? Think back to your impressions before you started this class versus how you

Question -your client david smith runs a small it

QUESTION - Your client, David Smith runs a small IT consulting business specialising in computer software and techno

Inspection of a random sample of 22 aircraft showed that 15

Inspection of a random sample of 22 aircraft showed that 15 needed repairs to fix a wiring problem that might compromise

Effective hrmquestionhow can an effective hrm system help

Effective HRM Question How can an effective HRM system help facilitate the achievement of an organization's strate