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Which of the following statements are true ? (A) A sentence α entails another sentence β  if β is true in few worlds where α is true. (B) Forward chaining and backward chaining are very natural reasoning algorithms for knowledge bases in Horn form. (C) Sound inference algorithms derive all sentences that are entailed. (D) Propositional logic does not scale to environments of unbounded size. Choose the correct answer from the options given below:
Forward chaining systems are _____________ where as backward chaining systems are ___________
There are primarily two modes for an inference engine: forward chaining and backward chaining.
Which of the following is not a characteristic of a daisy chaining priority control scheme?
The permissible error in chaining for measurement with chain on rough or hilly ground is
Consider the following statements. I. Daisy chaining is used to assign priorities in attending interrupts. II. When a device raises a vectored interrupt, the CPU does polling to identify the source of interrupt. III. In polling, the CPU periodically checks the status bits to know if any device needs its attention. IV. During DMA, both the CPU and DMA controller can be bus masters at the same time. Which of the above statements is/are TRUE?
The method usually adopted to contour a rough country where ordinary levelling is tedious and chaining is slow and inaccurate is:
While chaining along sloping ground, which of following instrument is used to transfer the points to the ground?
Consider the following: (i) Line ranger (ii) Reciprocal Ranging (iii) Random line ranging (iv) Optical square Which of these are employed to solve the problem of vision obstructed but chaining free?
Which of the following is a reason for negative error in chaining?