ace/practice

Question

Answer 1

Rolling back of transaction 3 doesnot effect any other transaction so it is cascadeless roll back schedule and all the cascadeless roll back schedule are recoverable schedules so answer is D

Comments

If we will talk about only recoverable then we can say na there is no write-read dependency so it is recoverable ??

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yes, we can say that

Answer 2

in this schedule no uncommitted read so it ir recoverable schedule and also it is not any dirty read so it casecadeless recoverable     so that it's satisfied both recoverable as well as casecadeless recoverable hence option D is correct