Checking Properties Memoryless, causal and stability of LTI System from the impulse response

Many Problems are solved to check Properties Memoryless, causal and Stability of LTI System from the given impulse response. Any Discrete time system is said to be memoryless if h(n)=0 for n=0, Similarly Continuous time system is said to be memoryless if h(t)=0 for t=0 System is said to be causal if h(n)=0 for n less than 0