railway RRB JE (CBT I + CBT II) Mock Test 2024 Signals and Systems Discrete Time Signals and Systems
A linear discrete-time system is characterized by its response hk(n) = (n – k)u(n – k) to a delayed unit sample δ(n – k). The system will be
1
Shift invariant
2
Shift variant
3
Scale invariant
4
Scale variant