Question: SQL, From this case I need answer for letter E and H only E.- Is it possible for deadlock to occur between two Sale Transactions?

SQL, From this case I need answer for letter E and H only

E.- Is it possible for deadlock to occur between two Sale Transactions? Why or why not? Is it possible for deadlock to occur between a Sale Transaction and an Item Quantity Received Transaction? Why or why not?

H.-The Queen Anne Curiosity Shop has developed the following procedure for backup and recovery. The company backs up the entire database from the server to a tape every Saturday night. The tapes are taken to a safety deposit box at a local bank on the following Thursday. Printed paper records of all sales are kept for 5 years. If the database is ever lost, the plan is to restore the database from the last full backup and reprocess all the sales records. Do you think this backup and recovery program is sufficient for the Queen Anne Curiosity Shop? What problems might occur? What alternatives exist? Describe any changes you think the company should make to this system.

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