movieID = 132 Int
movieCost = 4.95 Float
movie ='Star Wars' string
movieAwards = ('Oscar', 'Golden Globe', 'Director's Guild') tuple
movieStars = ['Carrie Fisher', 'Harrison Ford'] list
movieRatings = {5:'language', 3:'violence'} dictionary
If you want these explained , can do in replies :)
Answer:
Difference between laptops and desktop computer are:
- Desktop computers contain wide variety of components, but laptops are realtively expensive than desktop computers because laptop has high speed and better graphics designs which increased the cost of whole system.
- Desktop computer processors are larger in size and it is more efficient and powerful as compared to laptops because laptop processor still has some limitations.
- Laptop uses less power as compared to desktop computer because laptop contain small components and that is why it needs less power.
- Desktop computers are easy to upgrade and in laptops hard drive and memory, these two components needs to be upgraded.
You gave the answer in your question
Answer:
1. Processor communication -- this involves the following tasks:
<em>a. exchange of data between processor and I/O module</em>
<em>b. command decoding - I/O module accepts commands sent from the processor. E.g., the I/O module for a disk drive may accept the following commands from the processor: READ SECTOR, WRITE SECTOR, SEEK track, etc. </em>
<em>c. status reporting – The device must be able to report its status to the processor, e.g., disk drive busy, ready etc. Status reporting may also involve reporting various errors. </em>
<em>d. Address recognition – Each I/O device has a unique address and the I/O module must recognize this address. </em>
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2. Device communication – The I/O module must be able to perform device communication such as status reporting.
3. Control & timing – The I/O module must be able to co-ordinate the flow of data between the internal resources (such as processor, memory) and external devices.
4. Data buffering – This is necessary as there is a speed mismatch between speed of data transfer between processor and memory and external devices. Data coming from the main memory are sent to an I/O module in a rapid burst. The data is buffered in the I/O module and then sent to the peripheral device at its rate.
5. Error detection – The I/O module must also be able to detect errors and report them to the processor. These errors may be mechanical errors (such as paper jam in a printer), or changes in the bit pattern of transmitted data. A common way of detecting such errors is by using parity bits.
