T1: Move $100 from account (A) to account (B).T2: Compute the total amount in all accounts and return it to the application.The initial values for A, B for all the following schedules are 1000, 1000T1T2BEGINBEGINA=A-100 ECHOB=B+100 A+BCOMMIT COMMITS3T1BEGINX-LOCK(A)R(A)A=A-100W(A)X-LOCK(B)R(B)B=B+100W(B)UNLOCK(A)UNLOCK(B)COMMITT2BEGINS-LOCK(A)R(A)S-LOCK(B)R(B)UNLOCK(A)UNLOCK(B)ECHO A+BCOMMITA=.....................? B=Your Comment:Show Transcribed TextPlease: Type your answer DON'Twrite it by hand

Q1) Here the transactions may occur in any sequence and the sequence determines ECHO A+B (output)…

Answered: A=......................? B Your…

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Computer Science

A=......................? B Your Comment: .?

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

Computational Systems

The computation systems can be defined as the systems that are capable of solving a problem that includes calculations either mathematical or logical, and are able to produce the result as an output. For example, a simple calculator that is given a set of numbers and operators as input and produces the result as an output can be defined as a computational system. The above example is a simple illustration only, the computational systems range from simple devices to complex devices such as the systems that control the SpaceX companies, Starlink satellites which are being quite recently seen in the skies at many places globally.

Question

T1: Move $100 from account (A) to account (B).
T2: Compute the total amount in all accounts and return it to the application.
The initial values for A, B for all the following schedules are 1000, 1000
T1
T2
BEGIN
BEGIN
A=A-100 ECHO
B=B+100 A+B
COMMIT COMMIT
S3
T1
BEGIN
X-LOCK(A)
R(A)
A=A-100
W(A)
X-LOCK(B)
R(B)
B=B+100
W(B)
UNLOCK(A)
UNLOCK(B)
COMMIT
T2
BEGIN
S-LOCK(A)
R(A)
S-LOCK(B)
R(B)
UNLOCK(A)
UNLOCK(B)
ECHO A+B
COMMIT
A=.....................? B=
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On Thursday, November 4, 2021, Big Man Games wrote: Computer programs are great at computing mathematical formulas. Once the formula is properly encoded you can use the code as much as you want without reprogramming it and you can share it with non-programmers without any trouble. This lab is an example of such a formula. Once you program it you won’t have to worry about the area of a circle again. Write and test a program that computes the area of a circle. This program should request a number representing a radius as input from the user. Use the formula 3.14 × radius2 to compute the area. Tip: There are a couple of ways to code an exponent. Look in the Operators unit for help (and you can’t use an x for multiplication). Tip: You will need to use the float data type to compute the remainder. The output should explain the results. Don’t just print a number. Tip: For your print statement you will need to use the comma, “,”, or plus, “+” symbols to stitch your output together. (“The…
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