Correct Answer - Option 4 : x is 0 and y is 0.
Answer: Option 4
Data:
Data bits
|
d8
|
d7
|
d6
|
d5
|
d4
|
d3
|
d2
|
d1
|
1
|
1
|
0
|
x
|
0
|
1
|
0
|
1
|
Codeword = d8d7d6d5c8d4d3d2c4d1c2c1
Codeword =
1
|
1
|
0
|
x
|
y
|
0
|
1
|
0
|
0
|
1
|
1
|
0
|
B12
|
B11
|
B10
|
B9
|
B8
|
B7
|
B6
|
B5
|
B4
|
B3
|
B2
|
B1
|
C1=B1 ⊕ B3 ⊕ B5 ⊕ B7 ⊕ B9 ⊕ B11 = 0 ⊕ 1 ⊕ 0 ⊕ 0 ⊕ x ⊕ 1; for even parity x=0
C2 = B2 ⊕ B3 ⊕ B6 ⊕ B7 ⊕ B10 ⊕ B11 = 1 ⊕ 1 ⊕ 1 ⊕ 0 ⊕ 0 ⊕ 1;
C4 = B4 ⊕ B5 ⊕ B6 ⊕ B7 ⊕ B12 = 0 ⊕ 0 ⊕ 1 ⊕ 0 ⊕ 1;
C8 = y ⊕ 0⊕ 0 ⊕ 1⊕ ⊕ 1; for even parity y = 0 (putting x = 0)