The allocation methods define how the files are stored in the disk blocks.
There are three main disk space or file allocation methods:
1.Contiguous Allocation-in this scheme,each file occupies a set of blocks on the disk. For example if a file requires x blocks and is given a block y as the starting location,then the blocks assigned to the file be :x,y+1,y+2,......y+x-1.
This means that given the starting block address and the length of the file(in terms of blocks required) we can determine the blocks occupied by the file.
Advantages
-both the sequential and direct accesses are supported
-this is extremely fast since the number of seeks are minimal because of contiguous allocation of file blocks.
2.linked allocation-in this scheme,each file linked list of disk blocks which need not be contiguous disk blocks can be scattered anywhere on the disk.
Advantages
it is very flexible in terms of file size.file size can be increased easily since the system does not have to look for a contiguous chunk
of memory.
this method does not suffer from external fragmentation and it makes it relatively better in terms of memory utilization.
3.Indexed Allocation-in this scheme,a special block known as the index block contains the pointers to all the blocks occupied by a file.Each file has its own index block.the entry in the index block contains the disk address of the block
Advantages
it supports direct access to the blocks occupied by the file and therefore provides fast access to the file blocks
it overcomes the problem of external fragmentation.
The three items that can be enhanced due to the embedded computer technology are
Digital cameras
Smart phones
Home appliances
There is a massive list of items that are enhanced due to embedded computer technology. They range from simple systems like calculators, digital cameras, mobile phones, home appliances, to advanced systems like control nuclear power plant systems. All these items mentioned are always set to perform a particular function. They allow integration of various operating systems and are built to take advantage of miniature software or hardware state of electronic devices. Items such as smart phones have been enhanced and designed for power efficiency. They have taken advantage of embedded computing technology and do not come with heavy moving components like fans and huge processors. The same case applies to Digital cameras and Home appliance. Embedded computers in heavy equipment such as a washing machine cannot be compared to computing technology in a digital Panasonic camera.
<span>Think about a basic sandwich, you have a slice of bread, some filling, and another slice of bread. The sandwich technique of feedback is exactly the same way, a slice of bread (complement the person), the filling (what you'd like to have improve), and finally another slice of bread (another complement). So with that in mind, let's look at the available options.
1.
I really appreciate your attention to detail when stocking shelves;
however, you need to be a little bit faster when doing the stocking.
I also like how nice the shelves look when you are done working on them.
* This looks good, you have a complement about the attention to detail, afterwards you mention that you'd like the person to do their job faster, and you follow up with a complement about how nice the final result works. Bread, filling, bread. This looks like the correct answer.
2.
I really appreciate your attention to detail when stocking shelves;
however, you need to speed it up.
You need to be a little bit faster when stocking shelves.
* This starts off well with a complement about attention to detail. It then starts with some filling about the job being needed to be done faster. But if falls down with a second serving of the same filling. So you have bread, filling, filling. Not a sandwich, so this is incorrect.
3.
I do appreciate how nice the shelves look when you are done working on them, though.
You're really not too fast when you are doing the stocking.
* Another nice start with a complement. And you sort of have some filling (not sure if you're merely observing the lack of speed, or recommending more speed). But you still lack the 2nd piece of bread. So this isn't correct either.
4.
I really appreciate your attention to detail when stocking shelves, but it would be great if you could maybe speed it up.
* Once again, you correctly start off with a complement. And you follow up with the filling (what you want done better), but you're lacking the 2nd piece of bread. Not the right choice.
So of the 4 available choices, the best choice is the 1st option.</span>
This is a fun question to answer if you take into account the reports that WPA2 encryption was cracked last month. Better hope the hypothetical boss doesn’t read the news.
Bettt
