Digital Signal Processing quiz 1

If x(n)=aⁿ and a=3 then it is

• Decaying Exponential

• Growing Exponential

• Two sided growing

• two sided decaying

Identity the following system is y(n)=x(-n)

• Static or Anti causal   

• Dynamic or Causal          

• Dynamic or Non-causal         

• Static or Causa

In Linear Convolution if y(n)=x(n)^*h(n) where x(n) has M values and h(n) has N values then y(n) has

• N+M-1

• N+M

• N/M

• NM

The Number of samples present in the periodic signal cos(3πn) is

• N=5 samples

• N=2  samples

• N=3 samples

• N= 3/2 samples

Perform Signal multiplication for x(n)={1,2,3,4} and y(n)={3,6,9,12} is

• {3,12,27,48}

• {3,12,15,16}

• {4,8,12,16}

• {4,5,12,13}

The power value of the unit step discrete signal is

• infinite

• zero

• one

• 0 to 1

If the impulse response of LTI system is absolutely summable then it is called

• Causal

• non- causal

• stable

• non stable

A discrete-time system is called linear if only if it satisfies

• recursive principle

• superposition principle

• non recursive principle

• sampling theorem

In time scaling property of a signal when μ >1 then the output signal is called as

• expanded signal

• compressed signal

• growing Signal

• decaying signal

The sampling frequency is given by

• F≤ 2f_m                                             

• F≥ 2f_m

• F< f_m 

• F=f_m