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Advanced Database - Physical Storage Media Quiz

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Advanced Database - Physical Storage Media Quiz

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Questions and Answers

What is the maximum capacity of disk storage as of 2021?

1TB

4.7 to 17 GB

640 MB

112TB (correct)

What is the key characteristic of optical storage media?

Volatile and loses data during power failures

Requires a spinning disk and laser to read/write data (correct)

Provides faster read and write speeds than magnetic disk

Can only be written to once and then read-only

What is the main difference between fixed-length and variable-length records?

Fixed-length records are stored in blocks, while variable-length records are stored individually

Fixed-length records are easier to implement, while variable-length records are more complex

Fixed-length records have a predefined size, while variable-length records can be of any size (correct)

Fixed-length records require more disk space, while variable-length records are more efficient

What is the purpose of the file descriptor or file header?

To provide information about the file, such as field names and data types Signup and view all the answers

What is the main purpose of blocking when storing records on disk?

To improve read/write performance by storing multiple records in a single disk block Signup and view all the answers

Which type of storage media is the fastest and most costly?

Cache Signup and view all the answers

Which of the following is a characteristic of main memory?

Fast access, but limited capacity Signup and view all the answers

What is a key advantage of flash memory over main memory?

Data survives power failure Signup and view all the answers

Which of the following statements about magnetic disks is true?

Data can be read in any order Signup and view all the answers

What is the primary medium for long-term storage of data in a database system?

Magnetic disk Signup and view all the answers