Question

What is entry controlled and exit controlled loop? Give example.

Answer 1

As the name suggests the working of the loop,

1) Entry controlled loop - The loop which has a condition check at the entrance of the loop, the loop executes only and only if the condition is satisfied is called as entry control loop.

EX-

while loop

For loop

2) Exit controlled loop - The loop which keeps on executing until a particular condition is satisfied and when the condition is satisfied according to the criteria the loop exits, this is known as exit controlled loop.

EX-

While loop (during polling)

Answer 2

Answer:

Controllability measures the ability of a particular actuator configuration to control all the states of the system; conversely, observability measures the ability of the particular sensor configuration to supply all the information necessary to estimate all the states of the system.