Questions and Answers
What is one of the advantages of using a DBMS?
Allows multiple users to access and share data
Which factor can be a disadvantage of using a DBMS due to the specialized knowledge required?
Complexity in setup and maintenance
What is a potential drawback in terms of performance when using a DBMS?
Added performance overhead
How does a DBMS contribute to data security?
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What can be a significant drawback of using a DBMS in terms of cost?
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What is one of the disadvantages of using a file system for data storage?
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Why can unauthorized access be a concern when using a file system?
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What does the lack of concurrency in file systems mean for data access?
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How does a DBMS facilitate data organization compared to a file system?
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Which feature of a DBMS helps in preventing conflicting data access by multiple users?
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Why is the absence of backup and recovery in file systems a limitation?
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Study Notes
DBMS Features
- A DBMS provides tools for managing data security, including controlling access to data and encrypting sensitive data.
- A DBMS provides mechanisms for backing up and recovering data in the event of a system failure.
- A DBMS allows multiple users to access and share the same data, useful in a collaborative work environment.
Disadvantages of DBMS
- DBMS can be complex to set up and maintain, requiring specialized knowledge and skills.
- The use of a DBMS can add overhead to the performance of an application, especially in cases of high concurrency.
- The use of a DBMS can limit the scalability of an application, requiring the use of locking and other synchronization mechanisms.
- The cost of purchasing, maintaining, and upgrading a DBMS can be high, especially for large or complex systems.
Limitations of File Systems
- File systems can lead to inconsistencies due to typing errors or not updating all copies of the same data.
- Difficult data access: a user must know the exact location of the file to access data, making it cumbersome and tedious.
- File systems may lead to unauthorized access to data.
- No concurrent access: the file system does not allow concurrency, as data can be accessed by only one user at a time.
- No backup and recovery: the file system does not incorporate any backup and recovery of data if a file is lost or corrupted.
Advantages of DBMS
- A DBMS allows for the organization and storage of data in a structured manner, making it easy to retrieve and query the data as needed.
- A DBMS provides mechanisms for enforcing data integrity constraints, such as constraints on the values of data and access controls.
- A DBMS provides mechanisms for controlling concurrent access to the database, ensuring that multiple users can access the data without conflicting with each other.
