Comparing Boolean Expressions Practice Test

A simulation uses isSimulationRunning and isErrorDetected:

while (isSimulationRunning)

  if (isErrorDetected)

    isSimulationRunning = false

  ticks = ticks + 1

How does the program flow change when isSimulationRunning becomes false inside the loop?

In access control, hasValidCredentials and isAccountActive are used:

if (hasValidCredentials)

  if (isAccountActive)

    result = "LOGIN"

  else

    result = "INACTIVE"

else

  result = "FAIL"

What does the Boolean expression hasValidCredentials && !isAccountActive signify in the provided code?