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Matlab
Matlab Multiple Choice
Quiz 1
Solution
Q.1.
What is the output of the following code? A=[0 00 91 2 3]; nnz[A]
a) 4
b) 5
c) 3
d) Error
Q.2.
What is the output of the following code? A=[1 20 0 0]; spones(A)
a) Returns a sparse matrix with the non-zeros replaced by normally distributed random numbers
b) Returns a sparse matrix with the zeros replaced by ones
c) Returns a sparse matrix with the non-zeros replaced by fractions
d) Returns a sparse matrix with the non-zeros replaced by random numbers
Q.3.
The space located for the matrix generated from the spones command is _______
a) Same as a sparse matrix
b) Same as the original matrix
c) Same as an identity matrix
d) Double that of the sparse matrix
Q.4.
What is the output of the following code? A=[1 24 57 8 9];if( nzmax(A)==nzmax(spones(A) ) disp(‘Yeah !’)
a) No output
b) Error
c) Yeah !
d) Output suppressed
Q.5.
What is the output of the following code? nnz(spconvert([1 24 57 8 9])
a) 3
b) 2
c) 1
d) 6
Q.6.
What is the output of the following code? nzmax(spconvert([1 24 57 8 9])
a) 2
b) 3
c) 1
d) Error
Q.7.
A memory for sparse matrix is dedicated by the ______ command.
a) spalloc
b) sparsealloc
c) allocspar
d) no such command
Q.8.
What is the output of the following command? spalloc(2,7)
a) A 2*3 sparse matrix
b) Memory is allocated for a 2*3 sparse matrix
c) A 3*2 sparse matrix
d) Error
Q.9.
The default number of non-zero elements which can be put into the memory allocated by the spalloc command is > 1.
a) True
b) False
Q.10.
The pattern generated by the spy command is a measure of the number of zeros in the input matrix.
a) True
b) False
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