Each record has its own address on the file with by the help of which...
Random / Direct access -> Each record has its own address on the file with by the help of which it can be directly accessed for reading or writing
Each record has its own address on the file with by the help of which...
Understanding Data Access Methods
In the context of data storage and retrieval, it is essential to understand the types of access methods that can be employed to read or write records in a file. The correct answer to the question is option 'D', which encompasses both random access and direct access. Here’s a detailed explanation:
Sequential Access
- In sequential access, records are accessed in a predetermined order.
- This method is inefficient for large datasets when specific records need to be retrieved quickly.
Random Access
- Random access allows records to be read or written independently of their physical location.
- Each record can be accessed directly using its unique address, making it fast and efficient for retrieval.
Direct Access
- Direct access is similar to random access, where each record has a specific address.
- This means that the system can jump directly to the required record without scanning through others.
Why Both B and C are Correct
- Both random and direct access methods utilize the record's address for quick retrieval.
- They allow for efficient data manipulation, enabling applications to perform read and write operations without delay.
In summary, when a record has its own address in a file, it can be accessed directly, which characterizes both random and direct access methods. This flexibility is crucial in many applications, particularly in banking systems where quick access to data is vital. Therefore, the answer 'D' accurately reflects the capabilities of these access methods.