Questions and Answers
A file system provides a built-in mechanism for retrieving data efficiently.
False
As the number of files increases, handling the file system becomes easier.
False
Developers can always anticipate how data will be accessed in a file system.
False
The limitations of a file system include difficulty in accessing data due to the lack of retrieval mechanisms.
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Writing additional application programs to access data is often unnecessary in file systems.
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The statement 'files themselves provide a mechanism to retrieve data' is accurate.
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Volume of data does not affect the complexity of handling a file system.
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If data is stored in a file system, it can be easily accessed in any format.
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The RollNumber for Atharv Ahuja is 2.
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Daizy Bhutia was born on February 28, 2002.
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John Dsouza has a GUID of 444444444444.
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The SDateofBirth for Taleem Shah is listed in the table.
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Manika P. is the only student listed without a GUID.
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Ali Shah's SDateofBirth is earlier than John Dsouza's.
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Data mapping is fully supported in file systems, allowing seamless integration of different file formats.
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If the structure of a data file changes, existing application programs may continue to function properly without any updates.
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Different categories of users should ideally have the same level of access to all data in a controlled data sharing system.
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Data independence allows application programs to function without needing to adapt to changes in data structure.
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Writing new application programs to retrieve data from multiple locations is straightforward due to standardized file formats.
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Guardians should have the ability to modify or delete student attendance data in a controlled data sharing environment.
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Files created in isolation may have different formats, which complicates the process of writing application programs.
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Accessing attendance files requires that all users have unrestricted permissions to ensure proper data management.
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Each column in a table must have a unique column name.
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In a relational database, relations are considered independent from one another.
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The RollNumber attribute in the ATTENDANCE relation serves to connect with the corresponding student record in the STUDENT relation.
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In the context of the database described, the GUID attribute does not play a role in extracting guardian details.
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A table's rows represent unrelated sets of values in a relational database.
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If linking attributes are missing, it becomes possible to maintain the database in a correct state.
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A user can assign duplicate values to the RollNo field in the STUDENT table.
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It is permissible to insert a student record with a missing roll number value.
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Submitting a project detail without a submission date is allowed in the PROJECT-ASSIGNED table.
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It is possible to insert a record with the registration ID IP-101-19 and ProjectNo 206 in the PROJECT-ASSIGNED table.
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A student record can be inserted without a registration number value.
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Duplicate values for registration numbers are acceptable in the STUDENT table.
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Study Notes
Limitations of a File System
- File systems struggle with increased file numbers and data volume, leading to management challenges.
- Accessing data requires application programs, which may not support all data retrieval methods, complicating access to specific data formats.
- Lack of data mapping leads to the need for different programs when files are created in isolation, especially if they have varying formats.
- Data stored in particular structures requires program updates if the structure changes, leading to data dependence issues.
- Controlled data sharing is necessary to limit user access: different user roles (teachers, staff, parents) should only view permitted data (e.g., guardians viewing attendance without modification capabilities).
Database Structure
- A relational database uses tables that contain unique column names; each row represents a related set of values.
- Key attributes like RollNumber in the ATTENDANCE table link to the STUDENT table, ensuring data integrity and valid information retrieval.
- Attributes such as GUID in the STUDENT table allow for association with guardian details, emphasizing relationships between tables.
- The database must maintain linking attributes to keep data in a correct state and enable efficient information retrieval.
Example Tables
- STUDENT table includes columns like RollNumber, SName, SDateofBirth, and GUID for each student.
- The organization of data into multiple tables illustrates the relational nature, where different pieces of information are interrelated rather than standalone.
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Description
Explore the limitations of file systems and the structure of relational databases in this insightful quiz. Understand how data management issues arise due to increased volumes and the importance of controlled data sharing. Test your knowledge on database attributes and their roles in ensuring data integrity.
