Answer:
Giving that: The following is a sequence of undo-log records written by 2 transactions T and U:
< START T >;
< T,A,10 >;
< START U >;
< U, B, 20 >;
< T, C, 30 >;
< U, D, 40 >;
< Commit U >;
< T, E, 50 >;
< Commit T >;
1. < START U >
Recovery action in this case will be undo(-1) and undo(0). All restored to its original Value
log records < T, A, 10 >, < T, abort >; as written out
2. < T, E, 50 >
Recovery action in this case will be undo(8) and redo(0). A and C is restored to its original value, B and D are set to 20 and 40
log records <T, C, 30 >, < T, A, 10 >, < T, abort > are written out
3. < Commit T >
Recovery action in this case will be redo(7) and redo(4). A and C are set to 10 and 30, B and D are set to 20 and 40
A transaction is a simple task carried out as part of corporate operations. Transaction processing systems (TPS) handle business transactions for the corporation, supporting overall enterprise operations.
A TPS creates papers pertaining to a non-inquiry transaction and records the transaction itself, together with all of its results, in the database.
Today, TPS are required for business operations in practically every firm. TPSs feed information into organizational databases; they also serve as the framework for management-oriented information systems. Source data automation frequently involves direct data entering. Electronic data interchange is being utilized by transaction processing systems more and more. These systems offer computer-to-computer communication without the need for repeated data entry by substituting paper documents with formatted transaction data sent over telecommunications networks.
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Answer:
<h2>iv. NINGUNO DE LOS ANTERIORES</h2>
Explanation:
<h2>Hola</h2>
Dynamic Host Configuration Protocol, also known as DHCP.
Answer:
log base 3a= -0.631.log a/3 base 3
Now, -log m= log 1/m
hence,
log base 3a= 0.631.log 3/a base 3
log base 3a/log 3/a base 3 =0.631
log base 3 ( a.3/a) =.631 since, log m/logn =log n(m)
log base 3 3=0.631
Hence, answer is log base 3 3=0.631
Explanation:
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