# Recent posts tagged questions

1
Choose the correct alternatives ( more than one may be correct) and write the corresponding letters only: (viii) A non-planar graph with minimum number of vertices has (a) 9 edges, 6 vertices (b) 6 edges, 4 vertices (c) 10 edges, 5 vertices (d) 9 edges, 5 vertices
2
Choose the correct alternatives (more than one may be correct) and write the corresponding letters only: A $2-3$ tree is such that All internal nodes have either $2$ or $3$ children All paths from root to the leaves have the same length. The number of internal nodes of a $2-3$ tree having $9$ leaves could be $4$ $5$ $6$ $7$
3
Choose the correct alternatives (more than one may be correct) and write the corresponding letters only: Which of the following problems is not $NP$-hard? Hamiltonian circuit problem The $0/1$ Knapsack problem Finding bi-connected components of a graph The graph coloring problem
4
Choose the correct alternatives (more than one may be correct) and write the corresponding letters only: (v). Start and stop bits do not contain any 'information' but are used in serial communication Error detection Error correction Synchronization Slowing down the communications
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