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Error handling in Hard disk in computer architecture:
Modern drives also make widespread use of Error Correcting Codes (ECCs), specifically Reed-Solomon error correction. These techniques store additional bits for each block of data that are resolute by mathematical formulas. The extra bits permit many errors to be fixed. Whereas these additional bits occupy space on the hard drive, they permit higher recording densities to be employed, resulting in much higher storage capacity for user data. In the year 2009, in the newest drives, low-density parity-check codes (LDPC) are supplanting Reed-Solomon. LDPC codes are able performance near to the Shannon Limit and therefore allow for the highest storage density available.
Typical hard drives effort to "remap" the data in a physical sector that will be bad to a spare physical sector-hopefully whilst the number of errors in that bad sector is still little enough that the E CC can fully recover the data without loss.
Modular programming denotes to the practice of writing a program as a sequence of independently assembled source files. Every source file is a modular program intended to be assemb
SEARCH is a sequential search from the starting of the table. SEARCH ALL is a binary search, continually dividing the table in two halves until a match is found. SEARCH ALL is more
Mutation: However it may appear that the above recombinations are a little arbitrary that especially as points defining whether crossover and inversion occur are chosen random
What is an interrupt? An interrupt is an event that causes the implementation of one program to be suspended and another program to be implemented.
Disadvantages of wireless technology - Range can be very limited - Possible interference from nearby electronic devices - Security issues (i.e. tapping illegally into
Define various system? Single job system: Only one program may be run at a time, and therefore only one person might be work on a machine at one time. Multi job system:
What are the various mechanisms for implementing I/O operations? a) Program controlled I/O b) Interrupts c) DMA
Define Handshaking. Handshaking is a method commonly used to accompany ever data item being transfer with the control signal that show the presence of data in the bus. The unit
Basic Operational Concepts of a Computer: Most of computer operations are executed in the ALU (arithmetic and logic unit) of a processor. For an example: to add 2 numb
A two stage non-blocking network requires twice the number of switching elements as the single stage non-blocking network. It is true or false. Ans: It is true that a two st
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