43. Express each of these system specifications using predi-cates, quantifiers, and logical connectives.a) At least one mail message, among the nonempty setof messages, can be saved if there is a disk with morethan 10 kilobytes of free space. b) Whenever there is an active alert, all queued messagesare transmitted.c) The diagnostic monitor tracks the status of all systemsexcept the main console.d) Each participant on the conference call whom the hostof the call did not put on a special list was billed.

note as per our company guidelines we are supposed to answer only first 3 sub-parts. Kindly repost…

Answered: b) Whenever there is an active alert,…

b) Whenever there is an active alert, all queued messages are transmitted. c) The diagnostic monitor tracks the status of all systems except the main console.

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

Concurrency Control

The simultaneous occurrence of two or more operations is called concurrence and the situation is called concurrency. In concurrency, the function of one operation can affect the function of the other and put data integrity at risk. Hence, management for the control of concurrency is required. The management or controlling system in the Database Management System (DBMS) that coordinates concurrent access is called the concurrency control system.

Question

43. Express each of these system specifications using predi-
cates, quantifiers, and logical connectives.
a) At least one mail message, among the nonempty set
of messages, can be saved if there is a disk with more
than 10 kilobytes of free space.

b) Whenever there is an active alert, all queued messages
are transmitted.
c) The diagnostic monitor tracks the status of all systems
except the main console.
d) Each participant on the conference call whom the host
of the call did not put on a special list was billed.

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