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An index is clustered, if
- a)it is on a set of fields that form a candidate key
- b)it is on a set of fields that include the primary key
- c)the data records of the file are organized in the same order as the data entries of the index
- d)the data records of the file are organized not in the same order as the data entries of the
index
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
An index is clustered, ifa)it is on a set of fields that form a candid...
Clustered index is built on ordering non key field and hence if the index is clustered then the
data records of the file are organized in the same order as the data entries of the index.
data records of the file are organized in the same order as the data entries of the index.
Most Upvoted Answer
An index is clustered, ifa)it is on a set of fields that form a candid...
Explanation:
In database management systems, an index is a data structure that improves the speed of data retrieval operations on a database table. It is created on one or more columns of a table to allow efficient searching and sorting of rows based on the indexed column(s).
Clustered Index:
A clustered index determines the physical order of data in a table. In other words, the data records of the file are organized in the same order as the data entries of the index. This means that the rows in the table are stored on disk in the same order as the index key values.
Options:
Let's analyze each option to understand why option 'C' is the correct answer.
a) An index is clustered if it is on a set of fields that form a candidate key.
- This statement is not true because a clustered index is not necessarily created on a candidate key. It can be created on any column(s) of a table.
b) An index is clustered if it is on a set of fields that include the primary key.
- This statement is also not true because a clustered index does not need to include the primary key. It can be created on any column(s) of a table.
c) An index is clustered if the data records of the file are organized in the same order as the data entries of the index.
- This statement is correct. A clustered index determines the physical order of data in a table, so the data records are stored on disk in the same order as the index key values. This allows for efficient retrieval of data based on the indexed column(s).
d) An index is clustered if the data records of the file are organized not in the same order as the data entries of the index.
- This statement is the opposite of what a clustered index represents. A clustered index organizes the data records in the same order as the index key values, so this option is incorrect.
Therefore, the correct answer is option 'C': the data records of the file are organized in the same order as the data entries of the index.
In database management systems, an index is a data structure that improves the speed of data retrieval operations on a database table. It is created on one or more columns of a table to allow efficient searching and sorting of rows based on the indexed column(s).
Clustered Index:
A clustered index determines the physical order of data in a table. In other words, the data records of the file are organized in the same order as the data entries of the index. This means that the rows in the table are stored on disk in the same order as the index key values.
Options:
Let's analyze each option to understand why option 'C' is the correct answer.
a) An index is clustered if it is on a set of fields that form a candidate key.
- This statement is not true because a clustered index is not necessarily created on a candidate key. It can be created on any column(s) of a table.
b) An index is clustered if it is on a set of fields that include the primary key.
- This statement is also not true because a clustered index does not need to include the primary key. It can be created on any column(s) of a table.
c) An index is clustered if the data records of the file are organized in the same order as the data entries of the index.
- This statement is correct. A clustered index determines the physical order of data in a table, so the data records are stored on disk in the same order as the index key values. This allows for efficient retrieval of data based on the indexed column(s).
d) An index is clustered if the data records of the file are organized not in the same order as the data entries of the index.
- This statement is the opposite of what a clustered index represents. A clustered index organizes the data records in the same order as the index key values, so this option is incorrect.
Therefore, the correct answer is option 'C': the data records of the file are organized in the same order as the data entries of the index.
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An index is clustered, ifa)it is on a set of fields that form a candidate keyb)it is on a set of fields that include the primary keyc)the data records of the file are organized in the same order as the data entries of the indexd)the data records of the file are organized not in the same order as the data entries of theindexCorrect answer is option 'C'. Can you explain this answer?
Question Description
An index is clustered, ifa)it is on a set of fields that form a candidate keyb)it is on a set of fields that include the primary keyc)the data records of the file are organized in the same order as the data entries of the indexd)the data records of the file are organized not in the same order as the data entries of theindexCorrect answer is option 'C'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about An index is clustered, ifa)it is on a set of fields that form a candidate keyb)it is on a set of fields that include the primary keyc)the data records of the file are organized in the same order as the data entries of the indexd)the data records of the file are organized not in the same order as the data entries of theindexCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An index is clustered, ifa)it is on a set of fields that form a candidate keyb)it is on a set of fields that include the primary keyc)the data records of the file are organized in the same order as the data entries of the indexd)the data records of the file are organized not in the same order as the data entries of theindexCorrect answer is option 'C'. Can you explain this answer?.
An index is clustered, ifa)it is on a set of fields that form a candidate keyb)it is on a set of fields that include the primary keyc)the data records of the file are organized in the same order as the data entries of the indexd)the data records of the file are organized not in the same order as the data entries of theindexCorrect answer is option 'C'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about An index is clustered, ifa)it is on a set of fields that form a candidate keyb)it is on a set of fields that include the primary keyc)the data records of the file are organized in the same order as the data entries of the indexd)the data records of the file are organized not in the same order as the data entries of theindexCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An index is clustered, ifa)it is on a set of fields that form a candidate keyb)it is on a set of fields that include the primary keyc)the data records of the file are organized in the same order as the data entries of the indexd)the data records of the file are organized not in the same order as the data entries of theindexCorrect answer is option 'C'. Can you explain this answer?.
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An index is clustered, ifa)it is on a set of fields that form a candidate keyb)it is on a set of fields that include the primary keyc)the data records of the file are organized in the same order as the data entries of the indexd)the data records of the file are organized not in the same order as the data entries of theindexCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for An index is clustered, ifa)it is on a set of fields that form a candidate keyb)it is on a set of fields that include the primary keyc)the data records of the file are organized in the same order as the data entries of the indexd)the data records of the file are organized not in the same order as the data entries of theindexCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of An index is clustered, ifa)it is on a set of fields that form a candidate keyb)it is on a set of fields that include the primary keyc)the data records of the file are organized in the same order as the data entries of the indexd)the data records of the file are organized not in the same order as the data entries of theindexCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice An index is clustered, ifa)it is on a set of fields that form a candidate keyb)it is on a set of fields that include the primary keyc)the data records of the file are organized in the same order as the data entries of the indexd)the data records of the file are organized not in the same order as the data entries of theindexCorrect answer is option 'C'. Can you explain this answer? tests, examples and also practice GATE tests.
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