DSP - Mock Test

If x(n) and X(k) are an N-point DFT pair, then X(k+N)=?

• X(-k)
• -X(k)
• X(k)
• None of the mentioned

What is the DFT of the four point sequence x(n)={0,1,2,3}?

• {6,-2+2j-2,-2-2j}
• {6,-2-2j,2,-2+2j}
• {6,-2+2j,-2,-2-2j}
• {6,-2-2j,-2,-2+2j}

Which of the following is true in case of Overlap add method?

• M zeros are appended at last of each data block
• M zeros are appended at first of each data block
• M-1 zeros are appended at last of each data block
• M-1 zeros are appended at first of each data block

Which of the following statements is true?

• Only DFT is periodic and not inverse IDFT.
• Only IDFT is periodic and not inverse DFT.
• Both DFT and IDFT are periodic.
• Both DFT and IDFT are not periodic.

Which of the following is an advantage of fixed-point arithmetic over floating-point arithmetic?

• Higher precision
• Faster computation speed
• Easier range scaling
• Better handling of overflow and underflow

Which arithmetic operation can introduce quantization errors in fixed-point arithmetic?

• Addition
• Subtraction
• Multiplication
• Division

Which representation uses a fixed binary point, where the bit to the right represents the fractional part of the number?

• Floating point representation
• Sign-magnitude representation
• Fixed point representation
• Two's complement representation

The difference between an input value and its quantized value is called:

• Overflow error
• Round-off error
• Quantization error
• Coefficient error

What is the general system function of an FIR system?

• ∑M−1k=0bkx(n−k)
• ∑Mk=0bkz−k
• ∑M−1k=0bkz−k
• None of the mentioned

The desired frequency response is specified at a set of equally spaced frequencies defined by the equation

• π2M(k+α)
• πM(k+α)
• 2πM(k+α)
• None of the mentioned