Answer Posted / rajkumar
Systems, predominantly computing and computer-based systems,
which tolerate undesired changes in their internal structure
or external environment. Such changes, generally referred to
as faults, may occur at various times during the evolution
of a system, beginning with its specification and proceeding
through its utilization. Faults that occur during
specification, design, implementation, or modification are
called design faults; those occurring during utilization are
referred to as operational faults, The use of fault
tolerance techniques is based on the premise that a complex
system, no matter how carefully designed and validated, is
likely to contain residual design faults and to encounter
unpreventable operational faults.
Generally, fault tolerance techniques attempt to prevent
lower-level errors (caused by faults) from propagating into
system failures. By using various types of structural and
informational redundancy, such techniques either mask a
fault (no errors are propagated to the faulty subsystem's
output) or detect a fault (via an error) and then effect a
recovery process which, if successful, prevents a system
failure. In the case of a permanent internal fault, the
recovery process usually includes some form of structural
reconfiguration (for example, replacement of a faulty
subsystem with a spare or use of an alternate program) which
prevents the fault from causing further errors. Typically, a
fault-tolerant system design will incorporate a mix of fault
tolerance techniques which complement the techniques used
for fault prevention
Is This Answer Correct ? | 3 Yes | 0 No |
Post New Answer View All Answers
Why 4-20 amps is being used in instruments? Why cant we use any other range instead of 4-20 amps? Why only 4 amps is taken as lower limit and why 20 amps is taken as the higher limit?
1. For Steam drum level signal, why do we compensate with drum pressure signal? 2.For main steam Flow signal is comensated with main steam temperature signal and main steam pressure signal why?
What are the interlocks we have to check during the start up of LP/HP compressor?
Describe a time when you anticipated potential problems and developed preventive measures.
what is a vortex flow meter,mass flow meter and electromagnetic flow meter.particular use of this.means in which condition particular meter is used.
Where is wet leg is used?
Pl send the model question paper of mahagenco account officer post
What is the purpose of LO Overhead tank in turbines.
i am from instrument branch i want paper patern of mahagenco . any pevious years paper regarding my branch send me please . please.....
Explain why use mmwc unit?
What is the reason PT speed not incresed in gas turbine?
How to decrease opening & closing time of on/off valve?
What is three element drum level control system why its better than single element?
Why mixer nd grinder Is example of constant torque load not variable torque load ???
How INtools is useful for routine Instrument maintenance?