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Normalization-Dependency Preserving Video Lecture | Question Bank for GATE Computer Science Engineering - Computer Science Engineering (CSE)
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63 videos|7 docs|165 tests
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FAQs on Normalization-Dependency Preserving Video Lecture - Question Bank for GATE Computer Science Engineering - Computer Science Engineering (CSE)
| 1. What is normalization in the context of Dependency Preserving Computer Science Engineering (CSE)? |  |
Normalization refers to the process of organizing data in a database to eliminate redundancy and improve efficiency. In the context of Dependency Preserving Computer Science Engineering (CSE), normalization involves breaking down a large table into smaller, more manageable tables that are linked through relationships. This ensures that each table stores unique and non-redundant data, reducing data duplication and inconsistencies.
| 2. Why is normalization important in Dependency Preserving Computer Science Engineering (CSE)? | |
Normalization is crucial in Dependency Preserving CSE as it helps maintain data integrity and consistency. By eliminating redundancy, normalization ensures that data is stored efficiently and accurately. It also allows for easier data maintenance, updates, and queries. Additionally, normalization helps minimize anomalies, such as insertion, deletion, and update anomalies, that can occur when data is not properly organized.
| 3. What are the normal forms used in Dependency Preserving Computer Science Engineering (CSE) normalization? | |
The normal forms used in Dependency Preserving CSE normalization include:
1. First Normal Form (1NF): This form ensures that each attribute in a table contains only atomic values and there are no repeating groups.
2. Second Normal Form (2NF): In addition to 1NF, this form eliminates partial dependencies by ensuring that non-key attributes depend on the entire primary key.
3. Third Normal Form (3NF): Building upon 2NF, this form eliminates transitive dependencies by ensuring that non-key attributes depend only on the primary key and not on other non-key attributes.
4. Boyce-Codd Normal Form (BCNF): This form eliminates all non-trivial dependencies by ensuring that every determinant is a candidate key.
| 4. How does normalization preserve dependencies in Dependency Preserving Computer Science Engineering (CSE)? | |
Normalization in Dependency Preserving CSE aims to preserve dependencies between attributes by ensuring that no functional dependencies are lost during the normalization process. This means that if two attributes have a dependency in the original table, they should still have that dependency in the normalized tables.
To preserve dependencies, normalization involves carefully identifying and defining the primary key and functional dependencies in the original table. Then, through the decomposition process, the tables are split in a way that maintains the original dependencies. This ensures that all the necessary information can still be retrieved from the normalized tables without losing any dependencies.
| 5. Are there any drawbacks or limitations to normalization in Dependency Preserving Computer Science Engineering (CSE)? | |
While normalization offers numerous benefits in Dependency Preserving CSE, there are a few drawbacks and limitations to consider.
One limitation is that normalization can result in an increased number of tables, which may lead to more complex queries and joins. This can impact the performance of database operations, especially in large-scale systems.
Additionally, normalization can sometimes lead to data redundancy in the form of foreign keys, as relationships between tables are established. This can increase storage requirements and complicate update operations.
It is important to strike a balance between normalization and denormalization, considering the specific requirements and trade-offs of the system at hand.
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Nov 18, 2024 Last updated |
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