Q. Which of the following is an optimistic concurrency control method?

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Q. Which of the following is the process by which a user’s access to physical data in the application is limited, based on his privileges?

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Q. Linear probing suffers from a problem known as

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Q. An entity instance is a single occurrence of an …………..

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Q. Generalization is ………… process.

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Q. Match the following:

Set-I
I. 2 NF
II. 3 NF
III. 4 NF
IV. 5 NF

Set-II
(a) transitive dependencies eliminated
(b) multivalued attribute removed
(c) contain no partial functional dependencies
(d) contains no join dependency

Codes :
    I    II   III   IV

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Q. Which data management language component enabled the DBA to define the schema components?

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Q. The PROJECT Command will create new table that has

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Q. A chained hash table has an array size of 100. What is the maximum number of entries that can be placed in the table?

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Q. The E-R model is expressed in term of

I. Entities
II. The relationship among entities.
III. The attributes of the entities.
IV. Functional relationship.

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Q. Specialization is …………… process.

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Q. Match the following :

List-I
(1) Determinants
(2) Candidate key
(3) Non-redundancy
(4) Functional dependency

List-II
(a) No attribute can be added
(b) Uniquely identified a row
(c) A constraint between two attribute
(d) Group of attributes on the left hand side of arrow of function dependency.

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Q. A function that has no partial functional dependencies is in ……………. form.

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Q. Which of the following statement is wrong?

I. 2-phase locking protocol suffer from dead lock.
II. Time stamp protocol suffer from more aborts.
III. A block hole in a DFD is a data store with only inbound flows.
IV. Multivalued dependency among attribute is checked at 3 NF level.
V. An entity-relationship diagram is a tool to represent event model.

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Q. The name of the transaction file shall be provided by the operator and the file that contains the edited transactions ready for execution shall be called

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Q. (i) DML includes a query language based on both relation algebra and tuple calculus
(ii) DML includes a query language based on tuple calculus
(iii) DML includes a query language based on relational algebra
(iv) DML includes a query language based on none of the relational algebra and tuple calculus

Which one is correct?

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Q. Which construct in SQL is used to test whether a subquery has any tuples in its result?

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Q. An entity has:

(i) a set of properties
(ii) a set of properties and values for all the properties
(iii) a set of properties and the values for some set of properties may non-uniquely identify an entity
(iv) a set of properties and the values for some set of properties may uniquely identify an entity

Which of the above are valid?

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Q. Aggregation is:

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Q. Suppose R is a relation schema and F is a set of functional dependencies on R. Further, suppose R1 and R2 form a decomposition of R. Then the decomposition is a lossless join decomposition of R provided that:

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