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- Why did some states take longer to reenter? (Whiten the answer)?Please answer the below question in full details, thank you in advance. (a) In terms in concurrency, explain the following terms: (i) Critical Section (ii) Mutual exclusion (b) Explain with the aid of a diagram how a monitor with signal works.Please refer to this textbook: “A. Silberschatz, P. B. Galvin and G. Gagne, “Operating System Principles,”7th Edition, John Wiley & Sons Inc., 2006.” And answer the following questions: Question10: The following is not a property of transactions: (a) Permanent: once committed, the results of a transaction are made permanent. (b) Serializable: the result of concurrent transactions must be the same as if they were run in serial order. (c) Indivisible: the transaction appears as an indivisible action. (d) Bounded: a transaction must have an upper bound on the time it takes to complete
- Question 1 Begin from A and final state is F. Keep track of the successive values of the new state list, state list, current state and dead ends by using the backtracking on the graph of Figure 1. a) Figure 1: Graph APlease refer to this textbook: “A. Silberschatz, P. B. Galvin and G. Gagne, “Operating System Principles,”7th Edition, John Wiley & Sons Inc., 2006.” And answer the following questions: Question:The Ricart& Argwala mutual exclusion algorithm: (a) Does not depend on time stamps in messages while Lamport's does. (b) Cannot handle the case where two or more processes request the same resource at the same time. (c) Does not require a process to send messages to the entire group while Lamport's does. (d) Requires fewer messages than Lamport's algorithm.Problem Statement: (The following problem is based on problem statements in a number of operating systems texts) For this lab, you'll be setting up 2 queues of PCBs. A process control block (PCB) is an internal structure that is used to hold information associated with a process. A process is an instance of a program that is brought into random-access memory (RAM) for execution. To simplify matters, you'll be setting up 2 queues: a ready queue and a wait queue and, PCBs each PCB will have 2 fields: a process ID or PID (a positive integer) a link field to point to the next PCB on a queue The ready queue will have the PCBs for the processes that will be run in a first-come, first-served fashion. The wait queue will have the PCBs for the processes that will be waiting for a resource in a first-come, first-served fashion. If the PCB at the head of the ready queue needs some resource (for example, I/O) then it will be removed from the ready queue and moved to the rear of…
- Please refer to this textbook: “A. Silberschatz, P. B. Galvin and G. Gagne, “Operating System Principles,”7th Edition, John Wiley & Sons Inc., 2006.” And answer the following questions: Question16: An inode-based file system uses 4 Kbyte blocks and 4-byte block numbers. What is the largest file size that the file system can handle if an inode has 12 direct blocks, 1 indirect block, and 1 double indirect block?(b) KLM-GOMS stands for Keystroke-Level Model for Goals, Operators, Methods, and Selection rules. It allows designers to predict how long it will take a skilled user to execute a specific set of actions using a particular interface design. The standard set of operators are: • Keying (K): for typing a key or clicking a control - 0.2s Pointing (P): pointing with a mouse to a target on a display - 1.1s • Homing (H): home hands on keyboard or other input device - 0.4s Mentally Preparing (M): think before doing an action - 1.35s Responding (R): time a user must wait for a response Once you determine the operators, you need to apply the following rules for mental operations before calculating the time. Rule 0: Add Ms in front of all Ks and all Ps that point to commands. Rule 1: Change PMK to PK to remove fully anticipated Ms. Rule 2: Eliminate any Ms in the middle of strings that are part of a cognitive unit (a contiguous sequence of typed characters). Rule 3: Delete Ms before consecutive…c. UML diagram for search of listed jobs on a job page. Consider the search criteria, to store, validate and pass the user-entered search information. The search engine reads the job listings from a database object (data access layer) and puts the read information into a typed collection of "jog listing" objects. - search criteria are entered - the criteria can be changed - the final criteria are sent to search engine and then to the Database.
- Explain the following block diagram with details.c. UML diagram for search of listed jobs on a job page. Consider the search criteria, to store, validate and pass the user-entered search information. The search engine reads the job listings from a database object (data access layer) and puts the read information into a typed collection of "jog listing" objects. - search criteria are entered - the criteria can be changed - the final criteria are sent to search engine and then to the Database. 2 d. Give the battery state diagram. Even the battery power is below the threshold consider that the battery will continue providing power.Explain the concept of "execution flow."