Give an example of a database application in which the pointer method of representing variable-length records is preferable to the reserved-space method. Explain your answer.
Answer to relevant QuestionsShow the structure of the file of Figure after each of the following steps:a. Insert (Mianus, A-101, 2800).b. Insert (Brighton, A-323, 1600).c. Delete (Perryridge, A-102,400).In the sequential file organization, why is an overflow block used even if there is, at the moment, only one overflow record?Define the term dangling pointer. Describe how the unique-id scheme helps in detecting dangling pointers in an object-oriented database.For each B+-tree as shown below show the form of the tree after each of the following series of operations:a. Insert 9.b. Insert 10.c. Insert 8.d. Delete 23.e. Delete 19.Construct a B+-tree for the following set of key ...Why is a hash structure not the best choice for a search key on which range queries are likely?
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