Q. Which of the following are the advantages of transaction concurrency?

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Q. The average time for a transaction to be completed after it has been submitted is called as __________

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Q. If a schedule is equivalent to a serial schedule, it is called as a _________

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Q. Which of the following is not a type of a schedule?

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Q. Which of the following is a transaction isolation level as specified by SQL standard?

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Q. State true or false: Serializable level may allow both serializable and non-serializable executions

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Q. ________ allows only committed data to be read and further requires that no other transaction is allowed to update it between two reads of a data item by a transaction.

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Q. ________ allows only committed data to be read, but does not require repeatable reads

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Q. ___________ allows uncommitted data to be read

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Q. State true or false: All the isolation levels disallow dirty writes

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Q. When is a timestamp allotted

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Q. In ___________ isolation each transaction is given its own version of the database

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Q. What is the disadvantage of locking?

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Q. Consider money is transferred from (1)account-A to account-B and (2) account-B to account-A. Which of the following form a transaction ?

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Q. A transaction is delimited by statements (or function calls) of the form __________

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Q. Identify the characteristics of transactions

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Q. Which of the following has “all-or-none” property ?

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Q. The database system must take special actions to ensure that transactions operate properly without interference from concurrently executing database statements. This property is referred to as

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Q. The property of transaction that persists all the crashes is

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Q. __________ states that only valid data will be written to the database.

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