131.  If columnmajor order is used, how is the following matrix stored in memory?
a b c d e f g h i 
a.  ihgfedcba 
b.  abcdefghi 
c.  cfibehadg 
d.  adgbehcfi 
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Answer: (d).adgbehcfi

132.  Which of the following are the uses of matrices? 
a.  In solving linear equations 
b.  Image processing 
c.  Graph theory 
d.  All of the mentioned 
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Answer: (d).All of the mentioned

133.  What is the disadvantage of matrices? 
a.  Internal complexity 
b.  Searching through a matrix is complex 
c.  Not space efficient 
d.  All of the mentioned 
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Answer: (d).All of the mentioned

134.  Matrix A when multiplied with Matrix C gives the Identity matrix I, what is C? 
a.  Identity matrix 
b.  Inverse of A 
c.  Square of A 
d.  Transpose of A 
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Answer: (b).Inverse of A
