Question 1
Marks : +2 | -2
Pass Ratio : 50%
The slotted page structure is used for _________
Explanation: The slotted page structure is used for organizing records in a block. The slotted page structure contains a header at the beginning of each block.
Question 3
Marks : +2 | -2
Pass Ratio : 50%
The header in the slotted page structure does not contain which of the following data?
Explanation: The header in the slotted page structure does not contain the size of all the records put together in the header but it contains the number of record entries, the end of free space and an array containing location and size of each record.
Question 5
Marks : +2 | -2
Pass Ratio : 50%
What does a null bitmap indicate?
Explanation: A null-bitmap indicates that the attributes of a particular record have null values.
Question 6
Marks : +2 | -2
Pass Ratio : 50%
Which of the following is true about file header?
Explanation: A file header is a certain number of bytes allocated at the beginning of the file. It contains a variety of information about the file and it can be used to point the first record by storing the address of the first record in it.
Question 9
Marks : +2 | -2
Pass Ratio : 50%
How can variable length records arise in a file
Explanation: Variable length records arise in a system in several ways like, Storage of multiple record types in a file. Record types that allow variable lengths for one or more fields. Record types that allow repeating fields, such as arrays or multisets.