The z-Transform of a sequence x[n] is given as X(z) = 2z+4-4/z+3z^{2}. If y[n] is the first
difference of x[n], then Y(z) is given by

**A. **

**B. **

**C. **

**D. **

**Answer : ****Option A**

**Explaination / Solution: **

y(n) is first difference of x(n) So

g(n)=x(n)-x(n-1)

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The integral when evaluated by using Simpson’s 1/3 rule on two equal
subintervals each of length 1, equals

**A. ** 1.000

**B. ** 1.098

**C. ** 1.111

**D. ** 1.120

**Answer : ****Option C**

**Explaination / Solution: **

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Suppose A and B are two independent events with probabilities P(A) ≠ 0 and P(B) ≠ 0. Let and be their complements. Which one of the following statements is FALSE?
**A. ** P(A ∩ B) = P(A) P(B)

**B. **

**C. ** P( A U B) = P(A) + P(B)

**D. **

**Answer : ****Option C**

**Explaination / Solution: **

A and B are two independent events with probabilities, P(A) ≠ 0 and P(B) ≠ 0

A and B are two independent events with probabilities, P(A) ≠ 0 and P(B) ≠ 0

Now, we check the given options.

True

True

False

True

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Find the sum of the expression

**A. ** 7

**B. ** 8

**C. ** 9

**D. ** 10

**Answer : ****Option B**

**Explaination / Solution: **

The expression can be written as

The expression can be written as

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The solution of the partial differential equation is of the form

**A. **

**B. **

**C. **

**D. **

**Answer : ****Option B**

**Explaination / Solution: **

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The binary operation ∨ is defined as follows ;

**A. ** ~Q Λ ~P

**B. ** P ν ~Q

**C. ** ~P Λ Q

**D. ** ~P ν ~Q

**Answer : ****Option B**

**Explaination / Solution: **

No Explaination.

Which one of the following is equivalent to P∨Q?

No Explaination.

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Consider a hash table with 100 slots. Collisions are resolved using chaining. Assuming
simple uniform hashing, what is the probability that the first 3 slots are unfilled after the first
3 insertions?

**A. ** (97 × 97 × 97)/100^{3}

**B. ** (99 × 98 × 97)/100^{3}

**C. ** (97 × 96 × 95)/100^{3}

**D. ** (97 × 96 × 95)/(3! × 100^{3})

**Answer : ****Option A**

**Explaination / Solution: **

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An analytic function of a complex variable z = x + iy is expressed as f(z) = u(x, y) +iv(x, y) where i = √-1. If u = xy, the expression of v should be

**A. ** ((x + y)^{2}/2) + k
**B. ** ((x^{2} - y^{2})/2) + k
**C. ** ((y2 - x2)/2) + k

**D. ** ((x - y)2/2) + k
**Answer : ****Option C**

**Explaination / Solution: **

No Explaination.

No Explaination.

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All the four entries of the 2 × 2 matrix are nonzero, and one of its
eigenvalue is zero. Which of the following statements is true?

**A. ** P_{11}P_{12} – P_{12}P_{21} = 1

**B. ** P_{11}P_{22} – P_{12}P_{21} = -1

**C. ** P_{11}P_{22} – P_{12}P_{21} = 0

**D. ** P_{11}P_{22} + P_{12}P_{21} = 0

**Answer : ****Option C**

**Explaination / Solution: **

The product of Eigen value is equal to the determinant of the matrix. Since one of the Eigen value is zero, the product of Eigen value is zero, thus determinant of the matrix is zero.

The product of Eigen value is equal to the determinant of the matrix. Since one of the Eigen value is zero, the product of Eigen value is zero, thus determinant of the matrix is zero.

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For matrices of same dimension M , N and scalar c, which one of these properties DOES NOT ALWAYS hold ?

**A. **
**B. **
**C. **
**D. ** MN = NM

**Answer : ****Option D**

**Explaination / Solution: **

Let the matrices

(M^{T})^{T} = M

(cM)^{T} = c(M)^{T}

(M + N)^{T} = M^{T}
+ N^{T}

Let the matrices

i.e. the property holds always

i.e. property does not hold always.

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**Preparation Study Material**- Circuit Analysis (Study/Preparation)
- Digital Electronics (Study/Preparation)
- Signals and Systems (Study/Preparation)
- Communication Theory (Study/Preparation)
- Basic Electrical and Instrumentation Engineering (Study/Preparation)
- Electrical Engineering and Instrumentation (Study/Preparation)
- Electronic Devices (Study/Preparation)
- Linear Integrated Circuits LIC (Study/Preparation)
- Electronic Circuits I (Study/Preparation)
- Electronic Circuits II (Study/Preparation)
- Control System Engineering (Study/Preparation)
- Digital Communication (Study/Preparation)
- Digital Signal Processing (Study/Preparation)
- Microprocessors and Microcontrollers (Study/Preparation)
- Electromagnetic Theory (Study/Preparation)