A computer program repetedly does the following tasks: read a 4 KB block from the hard disk, process the data and generate a 4 KB block, and store the new block on the disk. The program is fully dedicated for the above tasks without any overlap between the I/O operations and processing. The processing task […]

A.A hard disk drive has a latency of 4.16 ms and a burst bandwidth of 10 MB/s. The CPU reads a 4 KB of data. Calculate the overall data transfer rate. B. A microcomputer based on Intel 80286 microprocessor operates at zero-wait state at a clock frequency of 12 MHz. Calculate the maximum bandwidth offered

A. A 64 bit PCI system operates at 66 MHz. Calculate the bandwidth.B. In any modern computer system, the application program is not allowed to perform I/O operations without the knowledge of the operating system in order to prevent unauthorized access to the files. In spite of this, a program can cause system ‘hang’ during

A program executes 10,000 instructions. It alternately reads data from the floppy and writes data on the floppy after every 1000 instructions. The user carelessly removes the diskette when the program has completed 3100 instructions and insertes a different diskette. If this mistake is unchecked, it will result in reading wrong data and overwriting the

A processor development team always supports only the memory mapped I/O and never provides direct I/O for achieving cost reduction. Explain how the processor cost is increased by including support for direct I/O (isolated I/O). B. Synchronous communication does not add start/stop bits to each character unlike asynchronous communication. Still, it is not preferred in

The DMA facility allows parallelism between CPU and I/O transfer with a limitation: the CPU cannot use the bus if an I/O transfer is in progress. As an improvement, a designer proposed dual port memory connected on two different buses: one for communication with CPU and the other for I/O transfer. Though this provides full

A. A computer system does not respond to a key press. The service engineer replace the keyboard, but the problem remains unsolved. He concludes that the software (OS/ driver) is faulty, which is not true. Detect the problem. B. A program has 20% branch instructions. Assuming that all the branches are successful, calculate the speedup,

Some users are not comfortable with typing on a keyboard. Suggest an alternate solution that does not require the keyboard. 1. Calculate the bandwidth of a monitor with a resolution of 720 × 350 and vertical scan rate of 50 Hz. 1. The data channel handles I/O operations by executing I/O commands, as discussed in

A. Table 1 is a list of several stars from the Pleiades cluster and their colors (mB – mV, or equivalently B-V) and their apparent visual magnitudes (mV, or equivalently V). Since B-V is a color, and color is related to temperature through Wein’s law, the B-V axis is a measure of temperature. Since all

Write an investigation based on one of your selected topics of interest from the “Strange Case of Dr.Jekyll and Mr. Hyde”. The specific instructions for a standing assignment are below in the files. Please followthe instructions no matter what, as it determines how the final paper will actually look like Sample Solution The post Strange