Homework Answers
The lseek() system call is actually of the following form
lseek(file_name, offset, whence)
file_name is the name of the file
offset is amount the file pointer should move
whence is the way in which offset should be referenced
whence can be SEEK_SET, SEEK_CUR, SEEK_END
Now we have to move 50 bytes from the beginning of the file
Assuming that file is opened for the first time, the file cursor is present at the beginning of the file
The system call would be :
lseek(file_name, 50, SEEK_SET)
Add Answer to:
Use a system call Iseek() to move a file pointer to 50 bytes after the beginning...
1. (10 pts) What is the largest file size if the inode is as follows: size of the inode is 128 Bytes out of which 64 Bytes are used for layout information, . each pointer is of size 8 Bytes and the f...
1. (10 pts) What is the largest file size if the inode is as follows: size of the inode is 128 Bytes out of which 64 Bytes are used for layout information, . each pointer is of size 8 Bytes and the file system block size is 4 KBytes, the inode has 2 direct pointers, 2 single indirect pointers, 2 double indirect pointers, and 2 triple indirect pointers 2. (10 pts) Find the average seek time (under the assumptions we...
Consider a file system that uses inodes to represent files. To locate the physical blocks of...
Consider a file system that uses inodes to represent files. To locate the physical blocks of each file, its inode contains up to 12 direct disk blocks, as well as one single, one double, and one triple indirect disk blocks. a. If disk blocks are 1 KB in size, and a pointer to a disk block requires 4 bytes. What is the maximum size of a file that can be stored in this file system? Note the size of a...
Consider a file system that uses inodes to represent files. Disk blocks are 4-KB in size...
Consider a file system that uses inodes to represent files. Disk blocks are 4-KB in size and a pointer to a disk block requires 4 bytes. This file system has 12 direct disk blocks, plus two single indirect disk blocks. What is the maximum size of a file that can be stored in this file system? A single indirect disk block points to a block where its whole space is used to point to data blocks. Please explain it as...
Really don't know what its about... Course in operating system, file system Question 2. File Systems (10 marks) (a) Consider a 32GB hard disk and a FAT file system with 24 bits cluster (block) ad...
Really don't know what its about...
Course in operating system, file system
Question 2. File Systems (10 marks) (a) Consider a 32GB hard disk and a FAT file system with 24 bits cluster (block) address. What is the minimum block (cluster) size in order to fully utilize all space in the hard disk? (3 marks) (b) Consider an index-based file system with the inode containing 64 direct pointers, 1 indirect pointer, and 1 double-indirect pointer. Suppose the size of a...
Question 12 Consider a magnetic disk drive with 10 double sided platters, 512(=2^9) tracks per surface,...
Question 12 Consider a magnetic disk drive with 10 double sided platters, 512(=2^9) tracks per surface, and 1024 (=2^10) sectors per track. Sector size is 2KBytes (=2^10 Bytes ). Assume the average seek time 0.02 ms, the seek time from a track to its adjacent track can be ignored. The drive rotates at 5400 rpm. Successive tracks in a cylinder can be read without head movement. Furthermore, disks can be handled independently, so multiple tracks in a cylinder can be...
In Unix/Linux, input and output are treated as files and referenced by the operating system using file descriptors. When you open a shell session, for example, three file descriptors are in use: 0 st...
In Unix/Linux, input and output are treated as files and referenced by the operating system using file descriptors. When you open a shell session, for example, three file descriptors are in use: 0 standard input (stdin) 1 standard output (stdout) 2 standard error (stderr) By default, the command interpreter (shell) reads keyboard input from file descriptor 0 (stdin) and writes output to file descriptor 1 (stdout), which appears on the screen. As you explored in Lab 2, input/output can be...
Create a C++ project Create an Employee class using a separate header file and implementation file....
Create a C++ project Create an Employee class using a separate header file and implementation file. The calculatePay() method should return 0.0f. The toString() method should return the attribute values ("state of the object"). Create an Hourly class using a separate header file and implementation file. The Hourly class needs to inherit from the Employee class The calculatePay() method should return the pay based on the number of hours worked and the pay rate. Remember to calculate overtime! Create a...
use python IDEL Please highlight the answer Problem 2 Files. Since almost all data can be...
use python IDEL
Please highlight the answer
Problem 2 Files. Since almost all data can be stored in files, knowing how to use files in programs is invaluable. Today you will practice with opening a file for reading, writing and editing using the Python interpreter. Do not type messages in red into Python shell Question 14 0.5 pts create a new file mytext.txt for >>>f1 = open("mytest.txt","w+") writing & reading >>>f1.write("hello\n") >>>for i in range(5): f1.write(str(i) + "\n") >>>f1.readlines() record...
Write a c++ program in that file to perform a “Search and Replace All” operation. This...
Write a c++ program in that file to perform a “Search and Replace All” operation. This operation consists of performing a case-sensitive search for all occurrences of an arbitrary sequence of characters within a file and substituting another arbitrary sequence in place of them. Please note: One of the biggest problems some students have with this exercise occurs simply because they don’t read the command line information in the course document titled “Using the Compiler’s IDE”. Your program: 1. must...
rnte a P instruction with indirect addressing, and call the ReadChar ein AL.)(10 pts.) BYTE named myString. Use the LOO edure from the book's link library- (ReadChar-returns its valu 50. Code a P...
rnte a P instruction with indirect addressing, and call the ReadChar ein AL.)(10 pts.) BYTE named myString. Use the LOO edure from the book's link library- (ReadChar-returns its valu 50. Code a PROC declaration for a procedure named MySub. Use the USES operator to preserve the EAX and EBX registers. 51. Draw a flowchart that corresponds to the following code: (6 pts.) mov ecx, LENGTHOF array mov eax, 0 mov esi, OFFSET array L1: add eax, [esi] add esi, TYPE...
1. (10 pts) What is the largest file size if the inode is as follows: size of the inode is 128 Bytes out of which 64 Bytes are used for layout information, . each pointer is of size 8 Bytes and the file system block size is 4 KBytes, the inode has 2 direct pointers, 2 single indirect pointers, 2 double indirect pointers, and 2 triple indirect pointers 2. (10 pts) Find the average seek time (under the assumptions we...
Consider a file system that uses inodes to represent files. To locate the physical blocks of each file, its inode contains up to 12 direct disk blocks, as well as one single, one double, and one triple indirect disk blocks. a. If disk blocks are 1 KB in size, and a pointer to a disk block requires 4 bytes. What is the maximum size of a file that can be stored in this file system? Note the size of a...
Really don't know what its about...
Course in operating system, file system
Question 2. File Systems (10 marks) (a) Consider a 32GB hard disk and a FAT file system with 24 bits cluster (block) address. What is the minimum block (cluster) size in order to fully utilize all space in the hard disk? (3 marks) (b) Consider an index-based file system with the inode containing 64 direct pointers, 1 indirect pointer, and 1 double-indirect pointer. Suppose the size of a...
In Unix/Linux, input and output are treated as files and referenced by the operating system using file descriptors. When you open a shell session, for example, three file descriptors are in use: 0 standard input (stdin) 1 standard output (stdout) 2 standard error (stderr) By default, the command interpreter (shell) reads keyboard input from file descriptor 0 (stdin) and writes output to file descriptor 1 (stdout), which appears on the screen. As you explored in Lab 2, input/output can be...
use python IDEL
Please highlight the answer
Problem 2 Files. Since almost all data can be stored in files, knowing how to use files in programs is invaluable. Today you will practice with opening a file for reading, writing and editing using the Python interpreter. Do not type messages in red into Python shell Question 14 0.5 pts create a new file mytext.txt for >>>f1 = open("mytest.txt","w+") writing & reading >>>f1.write("hello\n") >>>for i in range(5): f1.write(str(i) + "\n") >>>f1.readlines() record...
rnte a P instruction with indirect addressing, and call the ReadChar ein AL.)(10 pts.) BYTE named myString. Use the LOO edure from the book's link library- (ReadChar-returns its valu 50. Code a PROC declaration for a procedure named MySub. Use the USES operator to preserve the EAX and EBX registers. 51. Draw a flowchart that corresponds to the following code: (6 pts.) mov ecx, LENGTHOF array mov eax, 0 mov esi, OFFSET array L1: add eax, [esi] add esi, TYPE...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago