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What is the correct answer?

4

Select the correct statement
i) Aggregate functions work on a group of data and return a single value.
ii) ODBC connects the frontend with the database without considering its compatibility
iii) View definition cant be used at multiple places through with clause .

A. i and ii only

B. ii and iii only

C. i and iii only

D. i only

Correct Answer :

A. i and ii only


Related Questions

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4

View never contains derived columns.

A. True

B. False

C. Cant say

D. none

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4

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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4

As a side-effect of database update ,the system automatically executes a statement called

A. a view

B. a grant permission

C. a trigger

D. all of the above

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4

The database environment has all of the following components except:

A. users.

B. separate files.

C. database.

D. database administrator.

What is the correct answer?

4

The raw facts and figures are:

A. Data

B. Data field

C. DBMS

D. DBASE

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4

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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4

The syntax to select all column from the table is

A. select all from tablename

B. select * from tablename

C. select from tablename

D. none of these

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4

Which of the following submit and execute query at run time?

A. Static SQL

B. Dynamic SQL

C. both

D. none of these

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4

Functional dependencies are generalization of

A. Relation dependencies

B. Data dependencies

C. key dependencies

D. none of the above

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4

Which of the following is the unit of signaling speed or modulation rate or the rate of symbol transmission?

A. Data rate

B. Bit rate

C. Signal to Noise Ratio

D. Baud rate

What is the correct answer?

4

Encoding method which does not provide for synchronization

A. B8ZS

B. Manchester

C. RZ

D. NRZ-L

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4

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

What are the different types of radio waves that are used for computer network applications?
i) Spread spectrum
ii) High power, single frequency
iii) High power, multiple frequency
iv) Low power, single frequency
v) Low power, multiple frequency

A. i, ii and iii only

B. i, ii and iv only

C. ii, iii and iv only

D. i, iii and iv 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

In an object oriented model, one object can access data of another object by passing?

A. Instance variable

B. Variable

C. Message

D. Function

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4

Which of the following is not proper state of transaction ?

A. Partially aborted

B. Partially committed

C. Aborted

D. Committed

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4

The collection of information stored in a database at a particular moment is?

A. View

B. Instance

C. Scheme

D. None of these

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4

The host part in a class A type of an IP address has

A. 12 bits

B. 16 bits

C. 24 bits

D. 28 bits

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4

An entity set that does not have sufficient attributes to form a primary key is a

A. strong entity set.

B. weak entity set.

C. simple entity set.

D. primary entity set.

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4

In the architecture of a database system external level is the

A. physical level.

B. logical level.

C. conceptual level

D. view level.

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4

Event condition action model is related to

A. Views

B. Cursors

C. Triggers

D. None of these.

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4

The transaction consists of all statements executed between

A. the begin transaction and end transaction

B. the start transaction and end transaction

C. the begin transaction and finish transaction

D. none of the above.

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4

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

............... noise is caused by the random motion of the electrons in a wire and is avoidable.

A. Thermal

B. Intermodulation

C. Cross talk

D. Impulse

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4

Every Boyce-Codd normal form is in

A. 3NF

B. 2NF

C. 1NF

D. none of the above

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4

A …………… is a memory area where data are processed.

A. view

B. trigger

C. cursor

D. none of the above

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4

Three SQL, DDL, CREATE commands are

A. Schema, Base and Table

B. Schema, Table and View

C. Base, Table and Schema

D. Key, Base and Table

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4

In E-R Diagram weak entity set are represented by

A. Ellipse

B. Dashed ellipse

C. Dashed Rectangle

D. Doubled Rectangle

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4

In two-phase locking protocol the two phases are

A. growing phase and shrinking phase

B. execution phase and blocking phase.

C. running phase and sleeping phase.

D. none of the above

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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