Control Systems
What is the full form of SPICE ?

 Sequential program with integrated circuit analysis.
 None of these.
  Simulated program with integrated circuit analysis.
 Stimulated program with integrated circuit arrangement.

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Control Systems
A cascade of three linear time invariant systems is causal and unstable. From this we conclude that

 at least one system is causal and all systems are unstable.
 the majority are unstable and the majority are causal.
 at least one system is unstable and at least one system is causal.
 each system in the cascade is individually caused and unstable.

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