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UGC NET CSE | January 2017 | Part 3 | Question: 57

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In Artificial Intelligence(AI), what is present in the planning graph?

  1. Sequence of levels   
  2. Literals
  3. Variables
  4. Heuristic estimates
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Answer is Option A

A planning graph consists of sequence of levels correspond to time steps

ƒ Used to achieve better heuristic estimates.

  • A solution can also directly be extracted using GRAPHPLAN.

ƒ Consists of a sequence of levels that correspond to time steps in the plan.  

  • Level 0 is the initial state.

 Each level consists of a set of literals and a set of actions.  

  • Literals = all those that could be true at that time step, depending upon the actions executed at the preceding time step.
  • Actions = all those actions that could have their preconditions satisfied at that time step, depending on which of the literals actually hold.
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option i

 A planning graph consists of sequence of levels correspond to time steps.
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