Test: Z-Transform

QUESTION: 1

if, x(z) is with |z| >1, then what is the corresponding x(n)?

A.
e^-n
B.
eⁿ
C.
u(n)
D.
δ(n)

Solution:

QUESTION: 2

For which of the following x[n] cannot find z-transform x(z).

A.
B.
C.
D.
None of the these

Solution:

QUESTION: 3

The z-transform of a signal is given by

Its final valve is

A.
1/4
B.
Zero
C.
1.0
D.
∞

Solution:

QUESTION: 4

Which one of the following represents the impulse response of a system defined by H(z) = z^-m

A.
u [n - m]
B.
δ[n - m]
C.
δ[m]
D.
δ[m - n]

Solution:

QUESTION: 5

The z-transform of the time function is

Solution:

QUESTION: 6

The z-transform of the system is if the ROC is |z| < 0.2, then the impulse response of the system is

A.
(0.2)ⁿ u[n]
B.
(0.2)ⁿ - u [ - n - 1]
C.
- (0 .2)ⁿ- u[n]
D.
- (0. 2)ⁿ - u [- n - 1]

Solution:

QUESTION: 7

If the two discrete time signal

A.
x(n) = aⁿ u(n) and x(n) = aⁿ u(-n)
B.
x(n) = aⁿ u(n) and x(n) = aⁿ u{-n - 1)
C.
x(n) - aⁿ u(n) and x(n) = aⁿ u(-n- 1)
D.
none of these

Solution:

QUESTION: 8

lf The ROC for the above discrete time signal is

Solution:

QUESTION: 9

A stable and causal system is described by the difference equation,

The impulses response of the system is

Solution:

QUESTION: 10

A linear discrete time system has the characteristics equation, z³ - 0.81 z = 0, the system is

A.
is stable
B.
is marginally stable
C.
is unstable
D.
stability can not be assessed from the given information

Solution:

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10 Questions MCQ Test Topicwise Question Bank for Electronics Engineering | Test: Z-Transform

if, x(z) is with |z| >1, then what is the corresponding x(n)?

For which of the following x[n] cannot find z-transform x(z).

The z-transform of a signal is given by

Its final valve is

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