On the original UNIX file system, we are reading the file /one/two/three. txt. All the directories fit in a single block each. 1. Describe and count the number of disk reads involved in reading the file. Assume no disk cache/buffer is used.
2. How does FFS improve performance over the basic UNIX file system? (1 point) disk cache/buffer is used.
3. How does using the open(...) system call help the performance of the file system.
4. Lets create a symbolic link called three in directory one pointing at three. txt - Assume that three has a single block of data. List all i-nodes that are modified or created.
5. Explain two specific scenarios of problems that happen if the system crashes in the middle of part 4. What is their effect?

Which steps will open the system so that you can enter a question and do a search for

The idea that, for each pair of devices v and w, there’s a strict dichotomy between being “in range” or “out of range” is a simplified abstraction. more accurately, there’s a power decay function f (·) that specifies, for a pair of devices at distance δ, the signal strength f(δ) that they’ll be able to achieve on their wireless connection. (we’ll assume that f (δ) decreases with increasing δ.) we might want to build this into our notion of back-up sets as follows: among the k devices in the back-up set of v, there should be at least one that can be reached with very high signal strength, at least one other that can be reached with moderately high signal strength, and so forth. more concretely, we have values p1 ≥ p2 ≥ . . ≥ pk, so that if the back-up set for v consists of devices at distances d1≤d2≤≤dk, thenweshouldhavef(dj)≥pj foreachj. give an algorithm that determines whether it is possible to choose a back-up set for each device subject to this more detailed condition, still requiring that no device should appear in the back-up set of more than b other devices. again, the algorithm should output the back-up sets themselves, provided they can be found.\

If an image has only 4 colors, how many bits are necessary to represent one pixel’s color?