
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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All deadlocks entail competing demands for
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- Real-time Scheduling: Choose all true assertions. Rate Monotonic (RM) scheduling divides time into equal parts and requires each process to seek a portion upon starting. RM schedules real-time systems with CPU utilization below 1. When CPU utilization is less than 1, Earliest Deadline First (EDF) may schedule a real-time system. A process is initiated every p time unit. RM scheduling prioritizes shorter processes. EDF scheduling prioritizes processes with the shortest time frame.arrow_forwardPlease help with this question!! Please provide explanations as well!arrow_forwardDevelop a program C++ that accepts the name of a branch trace file as a command line argument. Use the data to simulate 4 branch prediction algorithms: Fixed-False predictor "Static-First" predictor makes its first prediction false (predicting the branch will not be taken) Bimodal dynamic predictor begins in the state that will predict false but not confidently (assumes the previous prediction was an error) Two-layered dynamic predictor uses a 2-bit history to index its prediction table and sets the Prediction:ErrCount bits to 0:1, 1:1, 0:1, and 1:1 for the histories 00, 01, 10, and 11, respectively and an initial history of two branches not taken. Your program (say it's a compiled C program) would be run like this: ./branch data.tra Trace File The trace file is line based where each line represents the history of a single branch instruction in memory. Each line will be a long string of '@' or '.' characters (indicating the branch was taken or not, respectively) without…arrow_forward
- Part A (15): Given a system of 4 processes with a set of constraints described by the following precedence relation: 2: {(P1, P3), (P1, P4), (P2, P4)} The processes access memory locations according to the following table: Process ID Domain (D) Range (R) P1 M1, M2 M4 P2 M3 М2 P3 M1, M4, M5 M5, М6 P4 М4 M3 Answer the following questions about the system: 1. Is the system determinate? Explain why. 2. Are all pairs of processes mutually non-interfering? Explain why. 3. What modifications are needed to guarantee the system to be determinate for all interpretations?arrow_forwarda. Three processes share four resource units that can be reserved and released only one at a time. Each process needs a maximum of two units. Show that a deadlock cannot occur. b. N processes share M resource units that can be reserved and released only one at a time. The maximum need of each process does not exceed M, and the sum of all maximum needs is less than M + N. Show that a deadlock cannot occur.arrow_forwardIn general, deadlocks involve nonpreemptable resources. Group of answer choices True Falsearrow_forward
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- Select all statements below that are true O A set of processes is in a safe state S if S is not a deadlock state and any state T reachable from S is not a deadlock state. In order for a deadlock to occur, only one of the four conditions necessary for deadlocks to occur must be satisfied. O A deadlock means that at least two processes cannot continue working because they are waiting for each to make resources available. о One of the the four conditions necessary for deadlocks to occur is non- preemption. Interrupts, messages, and signals are examples of consumable resources. Reusable resources are produced and consumed dynamically. QL - DELL Warrow_forwardTo guarantee that the system never experiences a hold and wait situation, it must be assured that:arrow_forward
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