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4

A fragmentation is categorized in

A. 1 part

B. 2 part

C. 3 part

D. 4 part

Correct Answer :

C. 3 part


Related Questions

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4

Tape storage is referred to as

A. sequential access storage

B. direct access storage

C. random access storage

D. none of the above

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4

Data integrity refers to

A. the uniqueness of the data in a database

B. the correctness and completeness of the data in a database

C. the un redundancies of the data in a database

D. Data independence of the database

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4

What is the max data capacity of STP?

A. 1 Gbps

B. 56 Mbps

C. 100 Mbps

D. 256 Mbps

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4

Extended Entity Relationship model consists of which of the following
i) Specialization
ii) Generalization
iii) Categorization

A. i and ii only

B. ii and iii only

C. i and iii only

D. All i, ii iii

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What does a field or a combination of fields that has a unique value called ?

A. Foreign key

B. Secondary key

C. Primary key

D. Alternate key

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Specialization is a

A. top-down approach.

B. bottom-up approach.

C. left-right approach.

D. none of the above

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4

The mode in which data item may be locked

A. Partner

B. Mutual

C. Exclusive

D. Atomic

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Only one communication channel is needed rather than n channels to transmit data between two communicating devices

A. parallel

B. serial

C. analog

D. digital

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The union of primary keys of a related entity becomes …………. Of a relation.

A. primarykey

B. superkey

C. candidatekey

D. foreignkey

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4

A logical description of some portion of database that is required by a user to perform task is called as

A. System View

B. User View

C. Logical View

D. Data View

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A relation is said to be in ………. If it doesnt contain partial dependency

A. 1NF

B. 2NF

C. 3NF

D. BCNF

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Select the incorrect statement

A. BCNF is stronger than 3NF

B. Relational algebra is a non-procedural language

C. Every conflict serializable schedule is view serializable.

D. none of the above

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4

Select the correct
i) A timestamp-based scheduler cant produce live lock
ii) Aggregate functions cant appear with HAVING clause.
iii) Isolation is a property of database transaction.

A. i and ii only

B. ii and iii only

C. i and iii only

D. i only

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4

For large networks, _______ topology is used

A. Ring

B. Bus

C. Mesh

D. none of these

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4

The types of noiseless channels are
i) Selective Reject ARQ
ii) simplest protocol
iii) Go-Back-N ARQ
iv) Stop-and-Wait Protocol

A. i, ii only

B. ii and iv only

C. ii and iv only

D. i, iv only

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4

Technique used in log based recovery

A. Immediate database modification

B. Graph-based recovery

C. key dependencies

D. none of the above

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4

An operation that will increase the length of a list is

A. insert

B. modify

C. lookup

D. none of the above

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4

In E-R diagram Generalization is represented by

A. Circle

B. Rectangle

C. Hyperbola

D. Triangle

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4

Range variables are designed using the

A. TO clause

B. FROM clause

C. RANGE clause

D. none of the above

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4

Volatile storage

A. loses its contents when power is switched off.

B. doesnt loses its contents when power is switched off.

C. creates backup when power is switched off.

D. none

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4

The command used to delete a particular column in a relation

A. UPDATE

B. DROP

C. ALTER

D. DELETE

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4

An association of several structure of a data base can be expressed graphically by?

A. Tuple

B. Record

C. Relationship

D. Field

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Symbol to represent weak entity set in ER Model

A. Dotted rectangle

B. Square

C. Doubly outlined rectangle

D. Diamond

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Select the incorrect statement(s)
i) Shared locks are compatible with each other.
ii) A relation which is in 3NF may have redundancy due to composite keys.
iii) A table in a database can have multiple indexes.

A. i only

B. ii, only

C. ii, iii only

D. none of the above

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4

Which one of the following statements is false?

A. The data dictionary is normally maintained by the database administrator.

B. Data elements in the database can be modified by changing the data dictionary.

C. The data dictionary contains the name and description of each data element.

D. The data dictionary is a tool used exclusively by the database administrator.

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4

Which of the following is not a constraint on a single relation?

A. check

B. unique

C. not null

D. is duplicate

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Radio frequencies below ............. are more suitable for omnidirectional applications.

A. 300MHz

B. 1GHz

C. 5GHz

D. 10 GHz

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Which of the following is also known as Offline storage ?

A. primary storage

B. secondary storage

C. tertiary storage

D. none of the above

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Tertiary storage

A. magnetic tape

B. juke box

C. optical disk

D. All of the above

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The ability to modify the conceptual schema without causing any change to the application program is known as

A. Physical data independence

B. Logical data independence

C. External data independence

D. Static data