1
GATE CSE 2012
MCQ (Single Correct Answer)
+2
-0.6
How many onto (or subjective) functions are there form an n-element $$(n\, \ge \,2)$$ set to a 2-element set ?
A
$${2^n}$$
B
$${2^n}\, - 1$$
C
$${2^n}\, - 2$$
D
$$2\,({2^n}\, - 2)$$
2
GATE CSE 2009
MCQ (Single Correct Answer)
+2
-0.6
For the compositive table of a cyclic group shown below GATE CSE 2009 Discrete Mathematics - Set Theory & Algebra Question 37 English

Which one of the following choices is correct?

A
a, b are generators
B
b, c are generators
C
c, d are generators
D
d, a are generators
3
GATE CSE 2007
MCQ (Single Correct Answer)
+2
-0.6
How many different non-isomorphic Abelian groups of order 4 are there?
A
2
B
3
C
4
D
5
4
GATE CSE 2007
MCQ (Single Correct Answer)
+2
-0.6
Consider the set of (column) vectors defined by $$X = \,\{ \,x\, \in \,{R^3}\,\left| {{x_1}\, + \,{x_2}\, + \,{x_3} = 0} \right.$$, where $${x^T} = \,{[{x_1}\, + \,{x_2}\, + \,{x_3}]^T}\} .$$ Which of the following is TRUE?
A
$$\left\{ {{{\left[ {1,\, - 1,\,0} \right]}^T},\,{{\left[ {1,\,\,0 ,- 1,\,} \right]}^T}} \right\}$$ is a basis for the subspace X.
B
$$\left\{ {{{\left[ {1,\, - 1,\,0} \right]}^T},\,{{\left[ {1,\,\,0,\, - 1,\,} \right]}^T}} \right\}$$ is a linearly independent set, but it does not span X and therefore is not a basis of X.
C
X is not a subspace of $${R^3}$$.
D
None of the above.
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