On your concern I will get the Indian Space Research Organisation EEE exam paper so that you can get idea about the exam.

Here is the exam paper
1.If sampling frequency doubles then
a) Quantization noise decreases
b) Quantization density decreases
c) Quantization noise increases
d) Quantization density increases

2. Two signals of 2GHz and 4GHz are frequency modulated on same carrier 10 GHz. Find the ratio of frequency deviation if band widths of both are equal.
a) 1:2 b)2:1 c) 1:1 d) 1:4

3. Gray code of 111 is

4. 3X512+7X64+5X8+3 then value in binary form contains _______ number of 1’s.
a) 7 b) 6 c) 9 d) none

5. The 2’s compliment of decimal number 19 in 8-bit system is
a) 11101101

6) The high gain codes are
a) Turbo codes b) BCH codes c) R-S codes

7) BCH codes are of the type________
a) Convolutional type b) c)

8) Time constant of LC circuit is
a) L/R b) L/R2 c) RL

9) If R is doubled and C is halved then frequency of series RLC circuit is

10) The solution for the equation (D2+4) y=sin2x is

11) Laplace Tramsform of sin3x is

12) The Z-transform for the series is
X [n] = { 7; n= -1

Indian Space Research Organisation EEE exam paper 1