Computer Science Engineering (CSE) Exam > Computer Science Engineering (CSE) Questions > An index is clustered, ifa)It is on a set of ...
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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 record of the file are organized in the same order as the date 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?
Verified Answer
An index is clustered, ifa)It is on a set of fields that form a candid...
Clustered index sort the data in the table based on their key values of the column on which clustered index is created.
Most Upvoted Answer
An index is clustered, ifa)It is on a set of fields that form a candid...
Clustered Index:
A clustered index is a type of index in a database that determines the physical order of the data in a table. It determines how the data is physically stored on disk. In a clustered index, the data records of the file are organized in the same order as the data entries of the index. This means that the data is physically sorted and stored based on the values of the indexed field(s).
Explanation of the Options:
a) It is on a set of fields that form a candidate key: This option is not the correct answer because a clustered index does not necessarily have to be on a candidate key. A candidate key is a set of fields that can uniquely identify a record in a table, but it is not a requirement for a clustered index.
b) It is on a set of fields that include the primary key: This option is also not the correct answer. While a primary key is often used as the basis for a clustered index, it is not a requirement. A clustered index can be created on any set of fields in a table.
c) The data record of the file are organized in the same order as the data entries of the index: This option is the correct answer. In a clustered index, the data records are physically stored in the same order as the data entries of the index. This allows for efficient retrieval of data based on the indexed field(s) because the data is already sorted on disk.
d) The data records of the file are organized not in the same order as the data entries of the index: This option is not the correct answer. In a clustered index, the data records are indeed organized in the same order as the data entries of the index. If the data records were not organized in the same order, it would not be a clustered index.
Conclusion:
In conclusion, a clustered index is defined by the fact that the data records of the file are organized in the same order as the data entries of the index. This allows for efficient data retrieval based on the indexed field(s), as the data is physically sorted on disk. It is important to note that a clustered index does not necessarily have to be on a candidate key or include the primary key. It can be created on any set of fields in a table.
A clustered index is a type of index in a database that determines the physical order of the data in a table. It determines how the data is physically stored on disk. In a clustered index, the data records of the file are organized in the same order as the data entries of the index. This means that the data is physically sorted and stored based on the values of the indexed field(s).
Explanation of the Options:
a) It is on a set of fields that form a candidate key: This option is not the correct answer because a clustered index does not necessarily have to be on a candidate key. A candidate key is a set of fields that can uniquely identify a record in a table, but it is not a requirement for a clustered index.
b) It is on a set of fields that include the primary key: This option is also not the correct answer. While a primary key is often used as the basis for a clustered index, it is not a requirement. A clustered index can be created on any set of fields in a table.
c) The data record of the file are organized in the same order as the data entries of the index: This option is the correct answer. In a clustered index, the data records are physically stored in the same order as the data entries of the index. This allows for efficient retrieval of data based on the indexed field(s) because the data is already sorted on disk.
d) The data records of the file are organized not in the same order as the data entries of the index: This option is not the correct answer. In a clustered index, the data records are indeed organized in the same order as the data entries of the index. If the data records were not organized in the same order, it would not be a clustered index.
Conclusion:
In conclusion, a clustered index is defined by the fact that the data records of the file are organized in the same order as the data entries of the index. This allows for efficient data retrieval based on the indexed field(s), as the data is physically sorted on disk. It is important to note that a clustered index does not necessarily have to be on a candidate key or include the primary key. It can be created on any set of fields in a table.
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An index is clustered, ifa)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 record of the file are organized in the same order as the date 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? for Computer Science Engineering (CSE) 2025 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about An index is clustered, ifa)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 record of the file are organized in the same order as the date 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? covers all topics & solutions for Computer Science Engineering (CSE) 2025 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 key.b)It is on a set of fields that include the primary key.c)The data record of the file are organized in the same order as the date 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?.
An index is clustered, ifa)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 record of the file are organized in the same order as the date 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? for Computer Science Engineering (CSE) 2025 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about An index is clustered, ifa)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 record of the file are organized in the same order as the date 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? covers all topics & solutions for Computer Science Engineering (CSE) 2025 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 key.b)It is on a set of fields that include the primary key.c)The data record of the file are organized in the same order as the date 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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