Data on the earliest personal computers were stored on ________

Give an example of a schedule of read/write requests that is accepted by a multiversion concurrency control in which transaction T1 starts after transaction T2 commits, yet T1 precedes T2 in the serial order. Such a schedule can have the following nonintuitive behavior (even though it is serializable): you deposit money in your bank account; your transaction commits; later you start a newtransaction that reads the amount in your account and finds that the amount you deposited is not there. (Hint: The schedule is allowed to contain additional transactions.)

What will be an ideal response?

Every class in Java, except ________, extends an existing class.

a. Integer. b. Object. c. String. d. Class.