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Syllabus: Connectivity, Matching, Coloring.

$$\scriptsize{\overset{{\large{\textbf{Mark Distribution in Previous GATE}}}}{\begin{array}{|c|c|c|c|c|c|c|c|}\hline
\textbf{Year}& \textbf{2022} & \textbf{2021-1}&\textbf{2021-2}&\textbf{2020}&\textbf{2019}&\textbf{2018}&\textbf{2017-1}&\textbf{2017-2}&\textbf{2016-1}&\textbf{2016-2}&\textbf{Minimum}&\textbf{Average}&\textbf{Maximum}
\\\hline\textbf{1 Mark Count} & 1&1&0&0&1&1&0&1&0&1&0&0.6&1
\\\hline\textbf{2 Marks Count} & 3 &1&0&1&1&1&0&0&0&0&0&0.7&3
\\\hline\textbf{Total Marks} & 7 &3&0&2&3&3&0&1&0&1&\bf{0}&\bf{2}&\bf{7}\\\hline
\end{array}}}$$

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Hot questions in Graph Theory

1 votes
1 answer
62
DRDO CSE 2022 Paper 1 | Question: 10
Given a tree $\text{T}$ and $\lambda \geq 2$ colours $\left(c_{1}, c_{2}, \ldots, c_{\lambda}\right),$ how many proper colourings of the tree $\text{T}$ are possible?
Given a tree $\text{T}$ and $\lambda \geq 2$ colours $\left(c_{1}, c_{2}, \ldots, c_{\lambda}\right),$ how many proper colourings of the tree $\text{T}$ are possible?
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0 votes
0 answers
63
Consider a weighted undirected graph with positive edge weights and let (u, v) be an [2] edge in the graph. It is known that the shortest path from source vertex r to u has weight 53 and shortest path from r to v has weight 65. Which statement is always true?
Consider a weighted undirected graph with positive edge weights and let (u, v) be an edge in the graph. It is known that the shortest path from source vertex r to u hasw...
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0 votes
1 answer
64
ISRO 2024
If there are five faces and nine vertices in an undirected planar graph, then number of edges is 14 6 12 None of the above
If there are five faces and nine vertices in an undirected planar graph, then number of edges is14612None of the above
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0 votes
0 answers
65
Made easy test series
Consider a strongly connected directed graph G(V, F), where |V| = 101. The minimum possible value of IEl is
Consider a strongly connected directed graph G(V, F), where |V| = 101. The minimum possible value of IEl is
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0 votes
1 answer
66
Regular and complete graph
which of the following statements is true: a complete graph is $(N-1)$ regular a $(N-1)$ regular is a complete graph
which of the following statements is true:a complete graph is $(N-1)$ regulara $(N-1)$ regular is a complete graph
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0 votes
1 answer
67
#self doubt
Domination set and MIS are the same?
Domination set and MIS are the same?
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39 votes
7 answers
68
GATE CSE 2008 | Question: 23
Which of the following statements is true for every planar graph on $n$ vertices? The graph is connected The graph is Eulerian The graph has a vertex-cover of size at most $\frac{3n}{4}$ The graph has an independent set of size at least $\frac{n}{3}$
Which of the following statements is true for every planar graph on $n$ vertices?The graph is connectedThe graph is EulerianThe graph has a vertex-cover of size at most $...
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0 votes
0 answers
69
Find the MIS and MaxIS
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1 votes
1 answer
70
Graph
1. Suppose that G is a non-directed graph with 12 edges. Suppose that G has 6 vertices of degree 3 and the rest have degrees less than 3. The minimum number of vertices G can have? a) 2 b) 0 c)1 d)3 I am getting 3..plz verify
1. Suppose that G is a non-directed graph with 12 edges. Suppose that G has 6 vertices of degree 3 and the rest have degrees less than 3. The minimum number of vertices G...
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0 votes
1 answer
71
#applied course
how many regions are in the above graph and please explain with region formula also. r=e-v+(c+1) my attempt is : r=5-5+2 r=2 but the rule is twice the no of boundary edges which is (5*2) = sum of region degrees which (4+5=9 ) can someone explain where the fault is
how many regions are in the above graph and please explain with region formula also.r=e-v+(c+1)my attempt is :r=5-5+2r=2but the rule is twice the no of boundary edges whi...
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0 votes
0 answers
72
#self_doubt#pyq#graphtheory
Let G be a complete undirected graph on 6 vertices. If vertices of G are labeled, then the number of distinct cycles of length 4 in G is equal to the answer is 45 but for the following cases, what will be the answer? 1- if the graph is directed 2- if vertices are not labeled.
Let G be a complete undirected graph on 6 vertices. If vertices of G are labeled, then the number of distinct cycles of length 4 in G is equal tothe answer is 45 but for ...
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0 votes
0 answers
73
made easy test series
Suppose A is a 12 by 9 incidence matrix from a connected (but unknown) graph with 12 edges and 9 nodes. Then how many columns of A are independent? what this question want to ask can someone help me {hint}
Suppose A is a 12 by 9 incidence matrix from a connected (but unknown) graph with 12 edges and 9 nodes. Then how many columns of A are independent?what this question want...
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39 votes
5 answers
74
GATE CSE 1999 | Question: 1.15
The number of articulation points of the following graph is $0$ $1$ $2$ $3$
The number of articulation points of the following graph is$0$$1$$2$$3$
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2 votes
1 answer
75
Chromatic Number
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0 votes
1 answer
76
Self doubt
How many simple directed (unweighted) graphs on the set of vertices {v0,v1,…v5} are there that have at most one edge between any pair of vertices? (That is, for two vertices a, b, only at most one of the edges (a, b) and (b, a) is in the graph.)
How many simple directed (unweighted) graphs on the set of vertices {v0,v1,…v5} are there that have at most one edge between any pair of vertices? (That is, for two ver...
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13 votes
5 answers
79
GATE CSE 2021 Set 1 | Question: 16
In an undirected connected planar graph $G$, there are eight vertices and five faces. The number of edges in $G$ is _________.
In an undirected connected planar graph $G$, there are eight vertices and five faces. The number of edges in $G$ is _________.
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43 votes
6 answers
80
GATE IT 2008 | Question: 27
$G$ is a simple undirected graph. Some vertices of $G$ are of odd degree. Add a node $v$ to $G$ and make it adjacent to each odd degree vertex of $G$. The resultant graph is sure to be regular complete Hamiltonian Euler
$G$ is a simple undirected graph. Some vertices of $G$ are of odd degree. Add a node $v$ to $G$ and make it adjacent to each odd degree vertex of $G$. The resultant graph...
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