Consider a file currently consisting of 10 blocks. Assume that the file control block and the new blockinformation to be added are already in memory. Calculate how many disk I/O operations are required for thelinked allocation strategy, if, for one block, the following conditions hold:HINTS: 1) ignore disk I/O associated with the file control block. 2) each read and each write is an explicit diskI/O. 3) assume a pointer to the end of the list for linked allocationa. The block is added at the beginning.b. The block is added in the middle.c. The block is added at the end.d. The block is removed from the beginning.e. The block is removed from the middle.f. The block is removed from the end.

Approach to solving the question: Let's walk through the approach to solve the disk I/O operations…

Answered: Consider a file currently consisting of…

C++ Programming: From Problem Analysis to Program Design

8th Edition

ISBN:9781337102087

Author:D. S. Malik

Publisher:D. S. Malik

Chapter12: Points, Classes, Virtual Functions And Abstract Classes

Section: Chapter Questions

Problem 19SA

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write a simple memory management simulator in C that supports paging. In this setup the logical address space (216= 65,536 bytes) is larger than the physical address space (215 bytes), and the page size is 256 bytes. The maximum no. of entries in the TLB (Translation Lookaside Buffer) = 16. memory.c - You are to provide your solution in a single C program named memory.c. Your simulator needs to accomplish the following: 1. Simulate a memory management unit (MMU), which translates logical addresses to physical addresses 1. Translating a logical address to physical address in this setup will involve the following: Check TLB for the page. If page not found in the TLB, check the page table if the page exists in memory. If it does not, then a page fault occurs. 2. Handling page faults involves copy the page from the backing store to memory. Since logical address space is larger than physical address space, a page request might involve replacing a page in memory with the new page. The page…
4 Part 1: get, put, del 4.2 User interface (main.c) The main function will contain the main loop of your program and should behave like this: 1. Create an empty dictionary 2. Print ">" on the standard output (this is important). 3. Read the command from the user; the first three characters are the command name, then a space, then the arguments, and a newline character \n. 4. If the command is unknown, exit. 5. If end-of-file was read (EOF), destroy the dictionary and exit. 6. Otherwise, execute the corresponding command and go back to 2. To read from the standard input, you will be using the stream reading functions from the standard library, with stream being stdin, a variable defined in : • int fgetc (FILE* stream): read one character of the given stream. This returns the constant EOF on end of file. • char* fgets (char* s, int size, FILE* stream): read in at most one less than size chars from stream and stores them into the buffer pointed to by or a newline. If a newline is read, it…
A3Q3.c - You are to write a C program that implements the following disk scheduling algorithms: a. FCFS [10 marks] b. SCAN [10 marks] c. C-SCAN [10 marks] d. SSTF [10 marks] e. LOOK [10 marks] f. C-LOOK [10 marks] • Your program will service a disk with 300 cylinders numbered 0 to 299. • • • • The program will service the requests (a list of 20 cylinder numbers) given in the file request.bin. This file contains (4 byte) integer values representing requests ranging from 0-299. Your program will take the initial position of the disk head as the first command line argument and the direction of the head as the second command line argument. It will then output the requests in the order in which they are serviced, and the total amount of head movements required by each algorithm. In particular, your program needs to do the following: Your program should take two command line arguments a) First command line argument - initial position of the disk head (an integer value) b) Second command line…
1. Consider the following incomplete C++ program: #include int main() { … } a. Write a statement that includes the header files fstream, string, and iomanip in this program. b. Write statements that declare inFile to be an ifstream variable and outFile to be an ofstream variable. c. The program will read data from the file inData.txt and write output to the file outData.txt. Write statements to open both of these files, associate inFile with inData.txt, and associate outFile with outData.txt. d. Suppose that the file inData.txt contains the following data: Giselle Robinson Accounting 5600 5 30 450 9 75 1.5 The first line contains a person's first name, last name, and the department the person works in. In the second line, the first number represents the monthly gross salary, the bonus (as a percent), and the taxes (as a percent). The third line contains the distance traveled and the traveling time. The fourth line contains the number of coffee cups sold and the cost of each coffee cup. Write statements so that after the program executes, the contents of the file outData.txt are as shown below. If necessary, declare additional variables. Your statements should be general enough so that if the content of the input file changes and the program is run again (without editing and recompiling), it outputs the appropriate results. Name: Giselle Robinson, Department: Accounting Monthly Gross Salary: $5600.00, Monthly Bonus: 5.00, Taxes: 30.000 Paycheck: $4116.00 Distance Traveled 450.00 miles, Traveling Time: 9.00 hours Average Speed: 50.00 miles per hour Number of coffee Cups Sold: 75, Cost: $1.50 per cup Sales Amount = $112.50 e. Write statements that close the input and output files. f. Write a C++ program that tests the statements in parts a through e.
Mark the following statements as true or false. An output stream is a sequence of characters from a computer to an output device. (1) To use cin and cout in a program, the program must include the header file iostream. (1, 2) Suppose pay is a variable of type double. The statement cin pay, requires the input of a decimal number. (2) The statement cin length; and length cin; are equivalent. (2) When the statement cin numl num2; executes, then after inputting a number into the variable numl the program skips all trailing whitespace characters. (2) To use the predefined function sqrt in a program, the program must include the header file cmath. (3) The statement cin.get (ch); inputs the next nonwhitespace character into the variable ch. (4) When the input stream enters the fail state, the program terminates with an error message. (5) To use the manipulators fixed and showpoint, the program does not require the inclusion of the header file iomanip. (6) The statement cin right; sets the input of only the next variable right-justified. (7) To input data from a file, the program must include the header file fstream. (10)
(Practice) a. Using Figure 2.14 and assuming the variable name rate is assigned to the byte at memory address 159, determine the addresses corresponding to each variable declared in the following statements. Also, fill in the correct number of bytes with the initialization data included in the declaration statements. (Use letters for the characters, not the computer codes that would actually be stored.) floatrate; charch1=M,ch2=E,ch3=L,ch4=T; doubletaxes; intnum,count=0; b. Repeat Exercise 9a, but substitute the actual byte patterns that a computer using the ASCII code would use to store characters in the variables ch1, ch2, ch3, and ch4. (Hint: Use Appendix B.)
Write a program to implement the algorithm that you designed in Exercise 22 of Chapter 1. (Assume that the account balance is stored in the file Ch4_Ex15_Data.txt.) Your program should output account balance before and after withdrawal and service charges. Also save the account balance after withdrawal in the file Ch4_Ex15_Output.txt.
(Data processing) A bank’s customer records are to be stored in a file and read into a set of arrays so that a customer’s record can be accessed randomly by account number. Create the file by entering five customer records, with each record consisting of an integer account number (starting with account number 1000), a first name (maximum of 10 characters), a last name (maximum of 15 characters), and a double-precision number for the account balance. After the file is created, write a C++ program that requests a user-input account number and displays the corresponding name and account balance from the file.

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