Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Question
Explain why a system requires a stalemate.
Expert Solution
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Step 1
Introduction:
Deadlock in the system is required by the following conditions: - Circular Wait Condition
Condition of Waiting
Condition of Non-Preemption
Mutual Exclusion is required.
Circular Waiting Situation:
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- Just what are the differences between ensuring that a deadlock doesn't occur and merely avoiding it?arrow_forwardDatabase systems In SQL MurachCollege database. Provide a list of all of the students, the number of courses they are taking, and the number of different instructors they have across all of their courses. The first column should provide the last name of each student (column titled Student Last Name). The second column should provide the number of courses that each student is taking (column titled Number of Courses). The third column should provide the number of different instructors that each student has for all of the courses they are taking (column titled Number of Different Instructors). No other columns should be provided in the result. Organize the result by student last name in alphabetical order.arrow_forwardWhen does a system get into a stalemate state, and how can it be avoided?arrow_forward
- What are the necessary conditions to prevent reaching a stalemate?arrow_forwardExplain the concept of deadlock in concurrent systems and provide examples of real-world situations where deadlock can occur.arrow_forwardWhat are the pros and cons of pessimistic concurrency in relation to optimistic concurrency? What are the pros and cons of explicit transactions in relation to implicit transactions, and vice versa? Support your rationale.arrow_forward
- Is it possible to draw a line of differentiation between avoiding deadlocks and preventing them?arrow_forwardDiscuss the trade-offs between preemptive and non-preemptive approaches in dealing with deadlock situations.arrow_forwardDeadlock only happens when mutual exclusion, hold-and-wait, no preemption and circular wait are present. Define“circular wait” and explain how it contributes, potentially, to deadlock.arrow_forward
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