IGNOU MCS 207 2025 2026 - Is this schedule serializable? Justify your answer. Identify the speci

Question

Is this schedule serializable? Justify your answer. Identify the specific concurrency problem (e.g., Lost Update, Dirty Read) that occurs here.

01 Dec 2025

Answer :

Word Count : 221

To determine whether a schedule is serializable, we need to check if its outcome is equivalent to some serial execution of the transactions involved. A schedule is conflict-serializable if we can reorder the non-conflicting operations of transactions to produce a serial schedule without changing the final state of the database. Conflicts occur when two operations from different

_____ ________ _______ ____ _________ _____ _______ ________ _______ ________.
_________ _________ __________ _______ ______ _____ ___ ______ ____.
__________ __________ ______ ___ ____ ______ ______ ________ _______ ______ ____ _________.
_______ __________ ______ _______ ______ ________.
________ _____ ______ _______ ___ ______ _______ __________ ________ ________ _______.
_________ ________ _____ ____ ____ _________ ____ __________ ______ ___ __________ _____.
________ _____ ____ ______ ___ ____ ________ __________ _________ ________ _______.
___ ______ _____ ________ ___ ______ ______ ____ ______ ________.
_____ ________ _______ __________ _______ _________ ___ ____ ______ _______ _______ ________.
_____ _________ ______ _________ ____ _____ __________ _________ _________ ______ _____ ______.
______ ______ _______ ________ _________ _________ _________ ________.
________ ____ ____ ____ ____ _________ ______ ________ _______ __________.
___ _____ ____ ______ _______ __________.
________ ______ _________ _________ _______ ___ ________ ____ _______.
_________ ____ _________ ____ _______ _________ _________ _____ _______.
_____ ____ _______ _____ __________ ______ _________ ______ ________.
_______ _______ _________ _________ ___ ______ _________ ____.

IGNOU ACADEMY

Your IGNOU journey, made easier.

Solved Assignments
Study Notes
Guess Papers
Question Papers

Call Us WhatsApp

STUDY • PREPARE • SUCCEED

Skip in 10

Related Questions

me	T1	T2
t1	READ(A)
t2	A = A - 100
t3		READ(A)
t4		A = A * 1.1
t5		WRITE(A)
t6		READ(B)
t7	WRITE(A)
t8	READ(B)
t9	B = B + 100
t10	WRITE(B)

(a) Consider a Relation: Course(CourseCode, CourseName, ProgrammeCode, ProgrammeName, CourseCredit, CourseDuration, Programme Duration, ProgrammeCredit). Some of the constraints on the relation Courseare:

CourseCode uniquely identifies a course.

ProgrammeCode is a unique code of a programme. A programme consists of many courses. A course can be part of multiple programmes.

A Programme consists of compulsory courses and optional courses. To complete a Programme, a student must complete all the compulsory courses and optional courses, as per the total credit requirements of a Programme.

Perform the following tasks for the relation given above:

(i) What is the key to the relation?

(ii) Identify and list the functional dependencies in the relation.

(iii) Make an instance of this relation consisting of at least 8 to 10 records, showing possible redundancies.

(iv) Decompose the relation Courseinto 2NF and 3NF relations.

(b) What is multi-valued dependency? Explain with the help of an example. How can it be used to decompose a relation into the 4th Normal Form? Explain with the help of an example. Also, explain the concept of the Join dependency with the help of an example.

(d) Consider the following relational database:

Member (memberId,memberName, memberAddress, memberPhone)

BookIssued (memberID, BookID, Issue Date, returnDate)

Book(BookId, BookTitle, FirstAuthor)

The underlined attribute(s) in the relations given aboveform the primary key. In relation Member the attribute memberId is the unique identifier of a member. The purposes of other attributes in the Member relation are self-explanatory. You may define the domain of different attributes. Pleasenote that the BookIssued relation has two foreign keys,namely memberID and BookID, which reference the Member and Book relations, respectively. Write and run the following SQL queries on the database:

(i) Create the tables with the primary and foreign key constraints.

(ii) Insert at least 5 records each in the Member and Book tables and about 10 records in the BookIssuedtable.

(iii) List the name and phone number of all the members in lexicographical order.

(iv) Find all the Books issued to the member whose memberID is "0001".

(v) a book is not returned if returnDate is NULL) Find the list of those members who have not returned more than one book. (Assume that

(vi) Find the number of books whose first author's name is "XYZ".

(vii) Find the pair of members who have the same memberPhone.

(viii) Find the list of Books whose title includes the term "Database".

(ix) Find the title of the book that has been issued the most.

(x) Find the list of members who have not issued any books.

IGNOU Solved Assignments Assignments Ignou Projects Project Previous Year Solved Exam Papers Notes Notes Sample Question Papers Sample Question Papers