Technical Questions asked in Robert Bosch

  1. The unilateral Laplace transform of f(t) is The unilateral Laplace transform of t f(t)

    Answer:  Option D.
  2. Consider the Amplitude Modulated (AM) signal Ac cosωct + 2 cos ωmt cosωct. For demodulating the signal using envelope detector, the minimum value of Ac should be
    1. 2
    2. 1
    3. 0.5
    4. Zero

    Answer: Option  A.
  3. The input to a coherent detector is DSB-SC signal plus noise. The noise at the detector output is
    1. the in-phase component
    2. the quadrature-component
    3. The envelope
    4. Zero

    Answer: Option  A.
  4. What is the output of this C code?
    #include
    void foo(const int *);
    int main()
    {
    const int j = 20;
    printf("%d ", j);
    foo(&j);
    printf("%d", j);
    }
    void foo(const int *j)
    {
    *j = 500;
    }
    1. Compile time error
    2. 10 20
    3. Undefined value
    4. 10

    Answer: Option  A.
    Constant type value cannot be changed
  5. The two atomic operations permissible on semaphores are : (choose two)
    1. wait
    2. Signal
    3. None of these
    4. Both (a) and (b)

    Answer:  Option  D.
  6. The Boolean function Y= AB+XZ is to be made using only 2-input NAND gates.The minimum number of gates requires is
    1. 2
    2. 3
    3. 5
    4. 6

    Answer: Option  B.
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