Register

Recent questions tagged descriptive

1 votes
0 answers
934
Andrew S. Tanenbaum (OS) Edition 4 Exercise 2 Question 10 (Page No. 174)
In the text it was stated that the model of Fig. $2-11(a)$ was not suited to a file server using a cache in memory. Why not? Could each process have its own cache?
In the text it was stated that the model of Fig. $2-11(a)$ was not suited to a file server using a cache in memory. Why not? Could each process have its own cache?
User Avatar
1 votes
2 answers
936
Andrew S. Tanenbaum (OS) Edition 4 Exercise 2 Question 8 (Page No. 174)
Consider a multiprogrammed system with degree of $6$ (i.e., six programs in memory at the same time). Assume that each process spends $40\%$ of its time waiting for I/O. What will be the CPU utilization?
Consider a multiprogrammed system with degree of $6$ (i.e., six programs in memory at the same time). Assume that each process spends $40\%$ of its time waiting for I/O. ...
User Avatar
0 votes
1 answer
939
Andrew S. Tanenbaum (OS) Edition 4 Exercise 2 Question 5 (Page No. 174)
A computer system has enough room to hold five programs in its main memory. These programs are idle waiting for I/O half the time. What fraction of the CPU time is wasted?
A computer system has enough room to hold five programs in its main memory. These programs are idle waiting for I/O half the time. What fraction of the CPU time is wasted...
User Avatar
2 votes
1 answer
940
Andrew S. Tanenbaum (OS) Edition 4 Exercise 2 Question 4 (Page No. 174)
When an interrupt or a system call transfers control to the operating system, a kernel stack area separate from the stack of the interrupted process is generally used. Why?
When an interrupt or a system call transfers control to the operating system, a kernel stack area separate from the stack of the interrupted process is generally used. Wh...
User Avatar
0 votes
0 answers
946
Andrew S. Tanenbaum (OS) Edition 4 Exercise 1 Question 34 (Page No. 83)
Write a shell that is similar to Fig. $1-19$ but contains enough code that it actually works so you can test it. You might also add some features such as redirection of input and output, pipes, and background jobs.
Write a shell that is similar to Fig. $1-19$ but contains enough code that it actually works so you can test it. You might also add some features such as redirection of i...
User Avatar
0 votes
0 answers
948
Andrew S. Tanenbaum (OS) Edition 4 Exercise 1 Question 32 (Page No. 83)
Virtual machines have become very popular for a variety of reasons. Nevertheless, they have some downsides. Name one.
Virtual machines have become very popular for a variety of reasons. Nevertheless, they have some downsides. Name one.
User Avatar
0 votes
0 answers
949
Andrew S. Tanenbaum (OS) Edition 4 Exercise 1 Question 31 (Page No. 83)
Explain how separation of policy and mechanism aids in building microkernel-based operating systems.
Explain how separation of policy and mechanism aids in building microkernel-based operating systems.
User Avatar
0 votes
0 answers
952
Andrew S. Tanenbaum (OS) Edition 4 Exercise 1 Question 28 (Page No. 83)
To a programmer, a system call looks like any other call to a library procedure. Is it important that a programmer know which library procedures result in system calls? Under what circumstances and why?
To a programmer, a system call looks like any other call to a library procedure. Is it important that a programmer know which library procedures result in system calls? U...
User Avatar
0 votes
0 answers
953
Andrew S. Tanenbaum (OS) Edition 4 Exercise 1 Question 27 (Page No. 83)
Modern operating systems decouple a process address space from the machine’s physical memory. List two advantages of this design.
Modern operating systems decouple a process address space from the machine’s physical memory. List two advantages of this design.
User Avatar
0 votes
0 answers
954
Andrew S. Tanenbaum (OS) Edition 4 Exercise 1 Question 26 (Page No. 83)
In the example given in Fig. $1-17$, the library procedure is called read and the system call itself is called read. Is it essential that both of these have the same name? If not, which one is more important?
In the example given in Fig. $1-17$, the library procedure is called read and the system call itself is called read. Is it essential that both of these have the same name...
User Avatar
0 votes
1 answer
955
Andrew S. Tanenbaum (OS) Edition 4 Exercise 1 Question 25 (Page No. 83)
What is the essential difference between a block special file and a character special file?
What is the essential difference between a block special file and a character special file?
User Avatar
0 votes
0 answers
958
Andrew S. Tanenbaum (OS) Edition 4 Exercise 1 Question 22 (Page No. 82)
Can the count = write(fd, buffer, nbytes); call return any value in count other than nbytes? If so, why?
Can thecount = write(fd, buffer, nbytes);call return any value in count other than nbytes? If so, why?
User Avatar
0 votes
0 answers
959
Andrew S. Tanenbaum (OS) Edition 4 Exercise 1 Question 21 (Page No. 82)
What type of multiplexing (time, space, or both) can be used for sharing the following resources: CPU, memory, disk, network card, printer, keyboard, and display?
What type of multiplexing (time, space, or both) can be used for sharing the following resources: CPU, memory, disk, network card, printer, keyboard, and display?
User Avatar
0 votes
0 answers
960
Andrew S. Tanenbaum (OS) Edition 4 Exercise 1 Question 20 (Page No. 82)
For each of the following system calls, give a condition that causes it to fail: fork, exec, and unlink.
For each of the following system calls, give a condition that causes it to fail: fork, exec, and unlink.
User Avatar
Page: