This set of Digital Signal Processing Multiple Choice Questions & Answers (MCQs) focuses on “Structures for IIR Systems”.

1. If M and N are the orders of numerator and denominator of rational system function respectively, then how many multiplications are required in direct form-I realization of that IIR filter?

a) M+N-1

b) M+N**c) M+N+1**

d) M+N+2

2. If M and N are the orders of numerator and denominator of rational system function respectively, then how many additions are required in direct form-I realization of that IIR filter?

a) M+N-1**b) M+N**

c) M+N+1

d) M+N+2

3. If M and N are the orders of numerator and denominator of rational system function respectively, then how many memory locations are required in direct form-I realization of that IIR filter?**a) M+N+1**

b) M+N

c) M+N-1

d) M+N-2

4. In direct form-I realization, all-pole system is placed before the all-zero system.

a) True**b) False**

5. If M and N are the orders of numerator and denominator of rational system function respectively, then how many memory locations are required in direct form-II realization of that IIR filter?

a) M+N+1

b) M+N

c) Min [M,N]**d) Max [M,N]**

6. The basic elements of a flow graph are branches and nodes.**a) True**

b) False

7. Which of the following is true for the given signal flow graph?

a) Two pole system

b) Two zero system**c) Two pole and two zero system**

d) None of the mentioned

8. What are the nodes that replace the adders in the signal flow graphs?

a) Source node

b) Sink node

c) Branch node**d) Summing node**

9. The output signal of a system is extracted at a sink node.**a) True**

b) False

10. If we reverse the directions of all branch transmittances and interchange the input and output in the flow graph, then the resulting structure is called as ______________

a) Direct form-I**b) Transposed form**

c) Direct form-II

d) None of the mentioned

11. What does the structure given below represents?

a) Direct form-I

b) Regular Direct form-II**c) Transposed direct form-II**

d) None of the mentioned

12. The structure shown below is known as ____________**a) Parallel form structure**

b) Cascade structure

c) Direct form

d) None of the mentioned