Q. The User Work Area (UWA) is a set of Program variables declared in the host program to communicate the contents of individual records between

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Q. Given a Relation POSITION (Posting-No, Skill), then query to retrieve all distinct pairs of posting-nos requiring skill is

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Q. If a relation with a Schema R is decomposed into two relations R1 and R2 such that (R1 ∪ R2) = R1 then which one of the following is to be satisfied for a lossless joint decomposition (---> indicates functional dependency)

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Q. Which level of Abstraction describes how data are stored in the data base ? 

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Q. Third normal form is based on the concept of ______.

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Q. The student. marks should not be greater than 100. This  is

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Q. GO BOTTOM and SKIP-3 commands are given one after another in a database file of 30 records. It shifts the control to

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Q. An ER Model includes
1. An ER diagram portraying entity types.
II. Attributes for each entity type
III. Relationships among . entity types.
IV. Semantic integrity constraints that reflects the business rules about data not captured in the ERdiagram.

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Q. Based on the cardinality ratio and participation______________associated with a relationship type, choose either the Foreign Key Design, the Cross Referencing Design or Mutual Referencing Design.

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Q. Data Integrity control uses _______________

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Q. Consider the following schemas
Branch = (Branch-name, Assets, Branch-city)
Customer = (Customer-name, Bank name, Customer-city)
Borrow = (Branch~name, loannumber, customer account-number)
Deposit = (Branch-name, Accountnumber,
Customer-name, Balance)
Using relational Algebra, the Query that finds customers who have balance more than 10,000 is_______

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Q. Find the false statement :

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Q. Consider the table:

Student (stuid, name, course, marks)
Which one of the following two queries is correct to find the highest marks student in course 5 ?

Q.1. Select S.stuid From student S Where not exists  (select * from student e where e.course = '5' and e.marks ≥s.marks)

Q.2. Select s.stuid From student S Where s.marks >any (select distinct marks from student S where s.course =5)

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Q. Armstrong (1974) proposed systematic approach to derive functional dependencies. Match the following w.r.t. functional dependencies:

a.Decomposition Rule (i)   If X →Y and Z →W then {X, Z} → {Y, W}

b. Union Rule (ii)  If X →Y an  {Y,W} → Z then {X, W} → Z

c. Composition Rule (iii) If X →Y and X →Z then X → {Y, Z}
 
d. Pseudo transitivity Rule (iv) If X →{Y,Z} and  {Y,W} → Z then X → Y and  X →Z

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Q. Match the following:
List - I                                         List - II

a. Secondary                          i.    Functional Dependency
Index

b. Nonprocedural                  ii.  B-Tree
Query
Language

c. Closure of                           iii. Relational Algebraic
set of                                                Operation
Attributes

d.  Natural                              iv. Domain Calculus
JOIN

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Q. The best normal form of relation scheme R(A. B, C, D) along with the set of functional dependencies F = {AB → C, AB → D, C → A, D → B} is

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Q. Identify the minimal key for relational scheme R(A, B, C, D, E) with functional dependencies F = {A → B, B → C, AC → D}

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Q. Division operation is ideally suited to handle queries of the type :

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Q. What kind of mechanism is to be taken into account for converting a weak entity set into strong entity set in entity-relationship diagram?

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Q. Which of the following is true?

I.  Implementation of self-join is possible in SQL with table alias.

II. Outer-join operation is basic operation in relational algebra.

III. Natural join and outer join operations are equivalent.

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