1. Consider the following snapshot of a system:AllocationRequestMarABCD ABCD0023 0001011012202356 1000A B C DP₁0 0 1 2P₂1000Pa1354PA00012201 2200Available12201.1. Is the system in a safe state?1.2. Can P3's request be safely granted immediately?1.3. If P3's request is granted immediately, does the system enter a deadlock?Show all your workings.

Step 1: 1.1 answer 1.1. To determine if the system is in a safe state, use the banker's algorithm.…

Answered: 1. Consider the following snapshot of a…

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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Consider a system with seven processes, A though G, and six resources, R through W. The state of which resources are currently owned and which ones are currently being requested is as follows: 1. ProcessA holds R and wants S. 2. Process B holds nothing but wants T. 3. Process C holds nothing but wants S. 4. Process D holds U and wants S and T. 5. Process E holds T and wants V. 6. Process F holds W and wants S. 7. Process G holds V and wants U. Which of the following statements is true O There is no deadlock O There is deadlock, and it involves processes D, E, and G only O There is deadlock, and it involves processes A, D, and G only O There is deadlock, and it involves processes A, D, E, F, and G only.
Operating system.
Operating System
A collection of messages uses the following symbols with the given relative frequencies: s : 3 t : 10 e : 8 a : 7 m : 1 (a) Construct the optimal Huffman code for these frequencies. (b) Encode the string test using this code. (c) Calculate the lower and upper bound of the average code length. Compare to the actual code length. Please no plagiarism
Problem 3. Given the following dataset: item 13 1 0.854780 2.940656 0.627579 2 -2.608538 3.223424 0.179739 3 2.111369 2.647818 0.977920 4 0.295153 3.180525 1.027033 0.046809 3.509254 2.799846 6. -0.229770 3.436737 0.129923 1.236500 2.656545 0.761414 -0.766021 3.075824 0.369941 -0.701157 3.049471 0.800193 10 -0.977820 3.318038 1.317061 (a) Estimate the mean of r1, 12 and r3 respectively. (b) Estimate the variance of r1, r2 and r3 respectively. (c) Estimate the 7th moment of x1, x2 and r3 respectively. (d) Based on the above information, identify an item that is most probably an outlier.
Two processes P1 and P2 as stated below are up for execution where they share a variable A that is common to both. Before either process begins execution, A is set to 6. The code mentioned below also uses a binary semaphore S that is being shared. P1 P2 int P: P11: P = A*2; P12: A =P; signal (S); int Q; P21: wait (S) P22: Q = A+1; A= Q; Before any of the processes begins its execution, S is set as 0. State all the different possible values of A after both processes finish executing.
4. Consider the CRC polynomial P=11012=X³ + X² + 1. a) In order to compute the CRC code word for the information, I=1110101102, How many bits of CRC check sum will be appended? b) In order to send the above information, I, what is the message M will be sent to a receiver with check bits(remainder)? c) If the following message, M = 110110100010 is transmitted to the receiver, what is the remainder of this message? Does it have a transmission error or not?
Consider the following snapshot of a system: Allocation Маx Available ABCD ABCD ABCD PO 2001 4212 3321 P1 3121 5252 P2 2103 2316 P3 1312 1424 P4 1432 3665 a. Illustrate that the system is in a safe state by demonstrating an order in which the processes may complete.
Assume the following parameters for Selective Repeat (SR): a) N = 4 b) Round Trip Time (RTT) = 10 ms c) Timeout period = 40 ms d) Segment Size = 2200 bytes. Suppose that Bob sent 14 segments, numbered 1 to 14, to Alice using the SR mechanism. Suppose that Segment 4 and Segment 10 were lost the first time the segments were sent to Alice (but reached Alice correctly when retransmitted). Apart from the above, there were no other segment losses. What is the average throughput obtained in sending all the segments (in bytes/sec)? Draw a diagram to show the communication of the segments in detail.
From a diagram similar to Cco ccicc2cC3 CC4 CC5 CC6 CC7 CC8 C9cc10cC11cC12 CC13 ID EX MEMWB Clock Iw $1, 24($S0) Iw $2, 28($S0) add $3, $2, $1 sw $3, 32($s0) IF Given that forwarding is implemented, choose the correct value of the CPI for the sequence.

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