Map the relational schema of Figure 6.14 into an ER schema. This is part of a process known as reverse engineering, where a conceptual schema is created for an existing implemented database. State any assumptions you make.
Q: Write a Python program to check whether a string is palindrome or not which is taken from the user i...
A: Required:- Write a Python program to check whether a string is a palindrome or not which is taken fr...
Q: In the main.asm file, you are to create a few arithmetic calculations using the following instructio...
A: Screenshot of code is given below-
Q: What exactly are computer languages?
A: Introduction: What exactly are computer languages?
Q: drawObject
A:
Q: What are some instances where you may anticipate machine intelligence to exceed human intellect?
A: Introduction: In comparison to humans, computers have a variety of benefits. They have more memory, ...
Q: Which chart type allows the display of data across 3D Lan O a. Pie Charts Ob. Line Charts O c. Colum...
A: Option D i.e. Surface Charts
Q: COMPLETE THE TABLE BELOW BINARY DECIMAL ОСTAL HEXADECIMAL Row 1 101100110 (1] [2] [3] Row 2 [4] 206 ...
A: For row 3 we have Octal value as 352 1) Octal to Decimal : We multiply each digit with its place va...
Q: Best way to communicate in agile development? -Answer
A: What is the Agile Methodology? Agile project management and software development is an iterative st...
Q: 23. What is wrong with the following function definition? double * calculate (double a, double b) { ...
A: The answer is given below.
Q: Two channels one with a bit rate of 190Kbps and another with a bit rate of 180 Kbps are to be multip...
A: Introduction
Q: Exercise 1: 6AWT Counter Counter Count Up Count Down Reset
A: JAVA Code: import java.awt.*;import java.awt.event.*;import javax.swing.*; public class Counter exte...
Q: 3.1 Give a detailed account of the project report writing highlighting the importance of the various...
A: With a project management reporting system in place, you'll be able to provide reports on a regular ...
Q: c routing protocols. What are the primary differences between the two and when would you use one ove...
A: given - OSPF and BGP are two of the most common dynamic routing protocols. What are the primary diff...
Q: Describe the main characteristics of productivity and graphics software.
A: Graphics software, in the context of computer graphics, refers to a programme or combination of appl...
Q: How to write a turing machine that organizes/sorts an input binary string. For example: given 1110 t...
A: Here we have given solution with transition drawing to sort the binary string
Q: In SQL, explain the most important data integrity restrictions.
A: Introduction: The general correctness, completeness, and consistency of data are data integrity. Ad...
Q: What happens if a cache miss occurs? Is there a significant lag in the execution of the instruction ...
A: Given: What happens if a cache miss occurs? Is there a significant lag in the execution of the instr...
Q: What does the (break) in the switch statement do?
A: What dose the break statement inside a switch statement: When we use break inside a switch statemen...
Q: Define transitive dependence in the context of databases.
A: Before we can understand what transitive dependency is, we must know what a functional dependency is...
Q: Convert the number system, row 2 without using calculator
A: 2| 206 2| 103 - 0 2| 51 - 1 2| 25 - 1 2| 12 - 1 2| 6 - 0 2| 3 - 0 2| 1 - 1 | 0 - 1 206 in binary...
Q: The distance from Earth to Mars is about 90 * 106 meters in the best case (the exact distance depend...
A: (d) distance = 90 x 106 m (B) Bandwidth = 2 Mb/s = 2 x 106 bits/s (L) Packet Length = 2000 bits (s) ...
Q: base 2 to ba
A: First I will divide the team members from 4 to 2 each for web and mobile based application..2 team ...
Q: What exactly is an intrusion prevention system?
A: INTRODUCTION: Intrusion prevention system (IPS): An intrusion prevention system (IPS) is network se...
Q: Which Tab is used to add a "Header" in Excel?
A: which tab is used to add header in a excel
Q: (python) Write a function myfunction that requests user input i the form of an integer value, 1, 2 ...
A: Code: def myfunction(): while(True): i=input("Select option: ") if(i=="1" or i=="2"...
Q: Improve your understanding of social media blogging, as well as cloud computing and other relevant s...
A: Introduction: Gain a better grasp of social media blogging, cloud computing, and other related topic...
Q: Differentiate WIRED media and WIRELESS media in terms signal energy, functionality (when to used), c...
A: The category of wire communication medium includes any physical connection that may transmit data as...
Q: eld of computer science, expla
A: Below the definition of RFP
Q: Make a concept map about "Relationships between Job Stress and Employee Well-Being in the Implicatio...
A: INTRODUCTION: Information and communications technology (ICT) is a subset of information technology...
Q: A micro-op is a fundamental operation of: (choose one) a. the IA-32 Architecture b. the IA-32 mac...
A: micro-op :- micro-op means micro- operations . These are the detailes low level instructions that ar...
Q: a. With the advent of sophisticated technologies and the internet, the multimedia industry is been f...
A: Answer : a). Two infringement activities are: 1.Piracy:Making a movie file or a large segment of a m...
Q: Using the sequence programming concept, create a flowchart and a java program that will read four re...
A: Please find the java program below: import java.util.*; import java.util.Scanner; class SeriesPar...
Q: Computer science What are the requirements for using the Amazon Web Services SDK S3 with a Spring B...
A: Introduction What are the requirements for using the Amazon Web Services SDK S3 with a Spring Boot...
Q: Convert 100 1100 0011 base 2 to base 16. I just need to understand how this works in steps.
A: The answer is 4C3
Q: write an if command to choose betwheen apple or oranage
A: You don't give a any programing language so I choose a Basic conceptual Language C. The Answer is gi...
Q: Prove or disprorve the following: Please show ypur solution 1. T(n) = 9n log n - 2n is θ(n log n)
A: Let g and f be the function from the set of natural numbers to itself. The function f is said to be ...
Q: In asynchronous transmission, why does the gap time between bytes differ?
A: Given: What causes the gap time between bytes in asynchronous transmission to vary?
Q: What are the most prevalent data structures used to index databases?
A: Introduction: A table index is a kind of information structure that offers a method for efficiently ...
Q: Describe the 5 stages of the information Life cycle
A: Information life cycle includes a number of steps that have the purpose of making the organizations ...
Q: Problem: Write a Python code that prints a triangle of triangles using the "A" symbol, given height ...
A: Given: We have to write a Python program that print a triangle of triangles. We have to used * sym...
Q: What perspectives should be considered while developing software system models?
A: System modeling is the process of developing abstract models of a system, with each model presenting...
Q: Create a program in C language that calculates the month's day from a given year and year's day. Use...
A: Algorithm: Start Implement a method named month_day() that takes year, yearday,pmonth and pday as a...
Q: a) Explain three reasons why lexical analysis is separated from syntax analysis b) For the following...
A:
Q: 3. Minimize the following DFA using Table Filling Algorithm. Show the steps. Draw the minimized DFA....
A: Given DFA contains 5 states that are A, B, C, D and E. Input alphabets={0,1} Initial state=A Set of...
Q: What are some successful methods for preventing data loss?
A: Introduction: Maintain a clean and dust-free environment for your PC. If your computer becomes overh...
Q: Q2. What are the various access specifiers for Java classes?
A: It is defined as a process of regulating access to classes, fields and methods in Java.These Specifi...
Q: Explain how a VPN can disguise a user's internet habits and prevent personal browsing data from bein...
A: A virtual private network (VPN) can hide a user's internal protocol address (IP address) and block t...
Q: ements for using the AWS SDK S3 with a Spr
A: Below the requirements for using the AWS SDK S3 with a Spring Boot application?
Q: Q 2.4 Find the upper bound for f(n) = n Q 2.5 Find the upper bound for f(n) = 2100 Q 2.6 Prove f (n)...
A: Here , I have explained upper bound, big omega and theta asymptomatic notations.
Q: How do I write a python program that iterates the integers from 1 to 50? For multiples of three pri...
A: The python program to print different string for some condition and for starting 50 numbers. If num...
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 1 images
- Today almost every commercial database is based on O the hierarchical model O the linked-list model O the object-oriented model lists the relational model Given the relations: STUDENT (SID. StudentName, Major, AdvisorID) ADVISOR (AdvisorID, AdvisorName, Office, Phone) such that each student is assigned to one advisor, which of the following is true? O Major is a candidate key. O Phone is a candidate key. AdvisorName is a determinant. O AdvisorID is a foreign key. O SID is both a primary key and a foreign key.Consider a database schema with a relation Emp whose attributes are as shown below, with types specified for multivalued attributes. Emp = (ename, ChildrenSet multiset(Children), SkillSet multiset(Skills))Children = (name, birthday)Skills = (type, ExamSet setof(Exams))Exams = (year, city) Redesign the database above into first normal form and fourth normal form. List any functional and multivalued dependencies that you assume. Also list all referential-integrity constraints that should be present in the first and fourth normal form schemas.Store the following fields for a library database: AuthorCode, AuthorName, BookTitle, BorrowerAddress, BorrowerName, BorrowerCardNumber, CopiesOfBook, ISBN (International Standard Book Number), LoanDate, PublisherCode, PublisherName, and PublisherAddress. A one-to-many relationship exists between publishers and books. Many-to-many relationships exist between authors and books and between borrowers and books. Without creating a set of dependency diagrams, write the relational schema that meet 3rd NF requirements.
- I need help with the following Consider a STUDENT relation in a UNIVERSITY database with the followingattributes (Name, Ssn, Local_phone, Address, Cell_phone, Age, Gpa). Note thatthe cell phone may be from a different city and state (or province) from thelocal phone. A possible tuple of the relation is shown below:Name Ssn Local_phone Address Cell_phone Age GpaGeorge Shaw 123-45-6789 555-1234 123 Main St., 555-4321 19 3.75William Edwards Anytown, CA 94539a. Identify the critical missing information from the Local_phone andCell_phone attributes. (Hint: How do you call someone who lives in a dif ferent state or province?)b. Would you store this additional information in the Local_phone andCell_phone attributes or add new attributes to the schema for STUDENT?c. Consider the Name attribute. What are the advantages and disadvantagesof splitting this field from one attribute into three attributes (first name,middle name, and last name)?d. What general guideline would you recommend for…Consider a relational database for an online hotel booking company. The database consisting ofthe following tables (where the primary keys are underlined): Hotel (hId, hName, hAddress, hCity) Guest(gId, gName, gAddress, gCity) Room(hid, roomNo, type, price) Booking(gId, hId, roomNo, fromDate, year, noOfDays)Where hId and gId are identifiers for the hotels and the guests,and the Booking relation indicated that a guest booked a hotel room for a specified number of days(noOfDays) starting from fromDate of a given year. For instance, a tuple < g12345, h5555, 220,Jan05, 2016, 15> in Booking indicates that the guest g12345 booked room 220 of the h5555 hotelfor 8 days starting on Jan 5, 2016. The attribute "gAddress" records the home address of theguests.Write the following queries in relational algebra (1) Return thename of guests who have booked a hotel room in NYC in January 2016 (i.e.,fromDate between 01/01 and 01/31 and year=2016).(2) Return thename of guests who have booked a…Draw the relationships and entities model for each of the following: * in the traditional way* for example: see the pic??. In the database of the library, the author can author more than one book, and the book can be subscribed toWritten by more than one author
- Suppose we have a relational database with five tables. table key Attributes S(sid, A) Sid T(tid, B) Tid U(uid, C) Uid R(sid, tid, D) sid, tid Q(tid, uid, E) tid, uid Here R implements a many-to-many relationship between the entities implemented with tables S and T, and Q implements a many-to-many relationship between the entities implemented with tables T and U. A. Write an SQL query that returns all records of the form sid, uid where sid is the key of an S- record and uid is the key of a U-record and these two records are related through the relations R and Q. Use SELECT and not SELECT DISTINCT in your query. B. Write an SQL query that returns records of the form A, C where the A-value is from an S- record and the C-value is from a U-record and these two records are related through the relations R and Q. Use SELECT and not SELECT DISTINCT in your query. C. Could one of your queries from parts (a) and (b) return more records than the other? If so, which one? Justify your answer. D.…Suppose we have a relational database with five tables. table key Attributes S(sid, A) Sid T(tid, B) Tid U(uid, C) Uid R(sid, tid, D) sid, tid Q(tid, uid, E) tid, uid Here R implements a many-to-many relationship between the entities implemented with tables S and T, and Q implements a many-to-many relationship between the entities implemented with tables T and U. A. Write an SQL query that returns all records of the form sid, uid where sid is the key of an Srecord and uid is the key of a U-record and these two records are related through the relations R and Q. Use SELECT and not SELECT DISTINCT in your query. B. Write an SQL query that returns records of the form A, C where the A-value is from an Srecord and the C-value is from a U-record and these two records are related through the relations R and Q. Use SELECT and not SELECT DISTINCT in your query. C. Could one of your queries from parts (a) and (b) return…Take a database, having FDs as: DOB->Age; Age->Eligibility; Name->RollNo; RollNo->Name; CourseNo->CourseName; CourseNo->Teacher; (RollNo, CourseName)->Marks. The relation (RollNo, Name, DOB, Age) is in which Normal Form?
- The next best alternate after BCNF is 3NF. We can say that this schema is 3NF but not BCNF. Match the following statements that make this 3NF and not BCNF dept_advisor(s_ID, i_ID, dept_name) § With function dependencies: i_ID → dept_name s_ID, dept_name → i_ID § Two candidate keys = { s_ID , dept_name }, { s_ID , i_ID } - A. B. C. D. i_ID is not a superkey - A. B. C. D. { dept_name} – {i_ID } - A. B. C. D. dept_name is contained in a candidate key - A. B. C. D. s_ID, dept_name A. {dept_name } B. Since each attribute A in β – α is contained in a candidate key for R, dept_advisors is 3NF C. superkey D. dept_advisor is not BCNFConsider a database that consists of the following relations.SUPpLIER(Sno. Sname)PART(Pno, Pname)PROJECT(Jno, Jname)SUPPLY(Sno, Pno, Jno)The database records information about suppliers, parts, and projectsandincludes a ternary relationship between suppliers, parts, and projects.Thisrelationship is a many-many-many relationships. Specify and execute thefollowingqueries using the relational algebraRetrieve the part numbers that are supplied to exactly two projects.b. Retrieve the names of suppliers who supply more than two parts toproject J11c. Retrieve the part numbers that are supplied by every supplier.d. Retrieve the project names that are supplied by supplier S1' only.e. Retrieve the names of suppliers who supply at least two different partseach to at least two different projects.Give a relational database schema for the following: EMPLOYEE (Fname, Minit, Lname, SSN, Bdate, Address, Sex, Salary, Super_ssn, Dno) PK= Ssn FK= Super_ssn DEPARTMENT ( Dnamc, Dnumbcr, Mgr_ssn, Mgr_start_datc) PK= Dnumbcr FK= Dno DEPT_LOCATIONS (Dnumber, Dlocation) PK= Dnumber FK= Dnumbcr PROJECT (Pname, Pnumber, Plocation, Dnum) PK= Pnumber FK= Pno WORKS_ON (Essn, Pno, Hours) PK= Pno FK= ssn DEPENDENT (Essn, Dependent_name, Sex, Bdate, Relationship) PK= Essn FK= Ssn