Q. .................. constraints ensure that a value that appears in one relation for a given set of attributes also appears for a certain set of attributes in another relation.

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Q. The SQL expression

Select distinct T, branch_name from branch T, branch S where T.assets>S.assets and S.branch_city=”Mumbai”

finds the names of

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Q. Consider the following schemas :

Branch_Schema = (branch_name, assets, city)
Customer_Schema = (cutstomer_name, street, city)
Deposit_Schema = (branch_name, account_number, customer_name, balance)
Borrow_Schema = (branch_name, loan_number, customer_name, amount)

Which of the following tuple relational calculus finds all customers who have loan amount more than Rs 12,000 ?

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Q. Match the following :

(a) Create          (i) The E-R Model
(b) Select           (ii) Relationship Model
(c) Rectangle    (iii) DDL
(d) Record         (iv) DML

Codes :
      (a)   (b)  (c)  (d)

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Q. Which of the following is not a type of Database Management System?

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Q. Manager's salary details are to be hidden from Employee Table. This Technique is called as

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Q. A Network Schema

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Q. Which normal form is considered as adequate for usual database design?

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Q. If D1, D2,…. Dn are domains in a relational model, then the relation is a table, which is a subset of

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Q. Given an open address hash table with load factor a < 1, the expected number of probes in a successful search is

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Q. The “PROJECT” operator of a relational algebra creates a new table that has always

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Q. The employee information of an Organization is stored in the relation:

Employee (name, sex, salary, deptname)

Consider the following SQL query

Select deptname from Employee Where sex = ‘M’ group by deptname having avg (salary) > {select avg (salary) from Employee}

Output of the given query corresponds to

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Q. For a database relation R(a, b, c, d) where the domains of a, b, c, d include only the atomic values. The functional dependency a → c, b → d holds in the following relation

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Q. Match the following:

a. Foreign keys                                  i. Domain constraint
b. Private key                                     ii. Referential integrity
c. Event control action model         iii. Encryption
d. Data security                                 iv. Trigger

Codes:
      a   b   c   d

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Q. In multiuser database if two users wish to update the same record at the same time, they are prevented from doing so by

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Q. What deletes the entire file except the file structure ?

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Q. Which command is the fastest among the following ?

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Q. B+ tree are preferred to binary tree in Database because

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Q. A Transaction Manager is which of the following ?

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Q. A B+ tree index is to be built on the name attribute of the relation STUDENT. Assume that all students names are of length 8 bytes, disk block are of size 512 bytes and index pointers are of size 4 bytes. Given this scenario what would be the best choice of the degree (i.e. the number of pointers per node) of the B+ tree ?

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