Distributed Databases Mcqs

Our collections of Multiple choice questions and answers focuses on study of ” Distributed Databases “. These questions are chosen from a collection of most authoritative and best reference books on DBMS. Our aim is to prepare an individual for competitive exams like NTS | GAT | ECAT | Data Warehouse jobs | Data Mining | DB administration jobs | Nadra Jobs | Software House and Data Base and Web Developer jobs | University and College entrance exams and various tests and job interviews. One should practice our Mcqs to assimilate knowledge on Distributed Databases comprehensively.

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Computer MCQS

Sciences MCQS

1.
A distributed database has which of the following advantages over a centralized database?

Software cost

Software complexity

Slow Response

Modular growth

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2.
An autonomous homogenous environment is which of the following?

The same DBMS is at each node and each DBMS works independently.

The same DBMS is at each node and a central DBMS coordinates database access.

A different DBMS is at each node and each DBMS works independently.

A different DBMS is at each node and a central DBMS coordinates database access.

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3.
A transaction manager is which of the following?

Maintains a log of transactions

Maintains before and after database images

Maintains appropriate concurrency control

All of the above

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4.
Location transparency allows for which of the following?

Users to treat the data as if it is at one location

Programmers to treat the data as if it is at one location

Managers to treat the data as if it is at one location

All of the above

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5.
A heterogeneous distributed database is which of the following?

The same DBMS is used at each location and data are not distributed across all nodes.

The same DBMS is used at each location and data are distributed across all nodes.

A different DBMS is used at each location and data are not distributed across all nodes.

A different DBMS is used at each location and data are distributed across all nodes.

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6.
Some of the columns of a relation are at different sites is which of the following?

Data Replication

Horizontal Partitioning

Vertical Partitioning

Horizontal and Vertical Partitioning

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7.
Which of the following is true concerning a global transaction?

The required data are at one local site and the distributed DBMS routes requests as necessary.

The required data are located in at least one nonlocal site and the distributed DBMS routes requests as necessary.

The required data are at one local site and the distributed DBMS passes the request to only the local DBMS.

The required data are located in at least one nonlocal site and the distributed DBMS passes the request to only the local DBMS.

Answer Discus (0)

8.
A homogeneous distributed database is which of the following?

The same DBMS is used at each location and data are not distributed across all nodes.

The same DBMS is used at each location and data are distributed across all nodes.

A different DBMS is used at each location and data are not distributed across all nodes.

A different DBMS is used at each location and data are distributed across all nodes.

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9.
Storing a separate copy of the database at multiple locations is which of the following?

Data Replication

Horizontal Partitioning

Vertical Partitioning

Horizontal and Vertical Partitioning

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10.
A distributed database is which of the following?

A single logical database that is spread to multiple locations and is interconnected by a network

A loose collection of file that is spread to multiple locations and is interconnected by a network

A single logical database that is limited to one location.

A loose collection of file that is limited to one location.

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11.
A semijoin is which of the following?

Only the joining attributes are sent from one site to another and then all of the rows are returned.

All of the attributes are sent from one site to another and then only the required rows are returned.

Only the joining attributes are sent from one site to another and then only the required rows are returned.

All of the attributes are sent from one site to another and then only the required rows are returned.

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12.
Which of the following is a disadvantage of replication?

Reduced network traffic

If the database fails at one site, a copy can be located at another site.

Each site must have the same storage capacity.

Each transaction may proceed without coordination across the network.

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13.
A distributed database can use which of the following strategies?

Totally centralized at one location and accessed by many sites

Partially or totally replicated across sites

Partitioned into segments at different sites

All of the above

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14.
Which of the following is not one of the stages in the evolution of distributed DBMS?

Unit of work

Remote unit of work

Distributed unit of Work

Distributed request

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15.
A distributed transaction can be …………. if queries are issued at one or more nodes.

Fully read-only

Partially read-only

Fully read-write

Partially read-write

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Engineering MCQS

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