1
GATE CSE 2007
MCQ (Single Correct Answer)
+1
-0.3
Let $$A$$ be the matrix $$\left[ {\matrix{ 3 & 1 \cr 1 & 2 \cr } } \right]$$. What is the maximum value of $${x^T}Ax$$ where the maximum is taken over all $$x$$ that are the unit eigenvectors of $$A$$?
A
$$5$$
B
$${{5 + \sqrt 5 } \over 2}$$
C
$$3$$
D
$${{5 - \sqrt 5 } \over 2}$$
2
GATE CSE 2005
MCQ (Single Correct Answer)
+1
-0.3
The determination of the matrix given below is $$$\left[ {\matrix{ 0 & 1 & 0 & 2 \cr { - 1} & 1 & 1 & 3 \cr 0 & 0 & 0 & 1 \cr 1 & { - 2} & 0 & 1 \cr } } \right]$$$
A
- 1
B
0
C
1
D
2
3
GATE CSE 2004
MCQ (Single Correct Answer)
+1
-0.3
The number of different $$n \times n$$ symmetric matrices with each elements being either $$0$$ or $$1$$ is
A
$${2^n}$$
B
$${2^{{n^2}}}$$
C
$${2^{{{{n^2} + n} \over 2}}}$$
D
$${2^{{{{n^2} - n} \over 2}}}$$
4
GATE CSE 2004
MCQ (Single Correct Answer)
+1
-0.3
What values of x, y and z satisfy the following system of linear equations? $$$\left[ {\matrix{ 1 & 2 & 3 \cr 1 & 3 & 4 \cr 2 & 3 & 3 \cr } } \right]\,\,\left[ {\matrix{ x \cr y \cr z \cr } } \right]\,\, = \,\left[ {\matrix{ 6 \cr 8 \cr {12} \cr } } \right]$$$
A
x = 6, y = 3, z = 2
B
x = 12, y = 3, z = - 4
C
x = 6, y = 6, z = - 4
D
x = 12, y = - 3, z = 0
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