Trees & Graphs MCQs with Answers

In graph theory, what is the principle of vertex coloring?

• A.Assigning colors to faces of a planar graph only
• B.Assigning colors to edges such that no two edges share the same color
• C.Assigning colors to vertices such that each vertex gets a unique color
• D.Assigning colors to vertices such that adjacent vertices have different colors

Which traversal technique is utilized in the breadth-first search (BFS) algorithm for graphs?

• A.Pre-order traversal
• B.Depth-first traversal
• C.In-order traversal
• D.Level-order traversal

Which data structure is most suitable for implementing a priority queue?

• A.Linked List
• B.Stack
• C.Queue
• D.Binary Heap

Which algorithm is typically used to determine the shortest path between nodes in a graph?

• A.Prim's Algorithm
• B.Kruskal's Algorithm
• C.Dijkstra's Algorithm
• D.Bellman-Ford Algorithm

Which of the following is considered a non-linear data structure?

• A.Array
• B.Stack
• C.Graph
• D.Queue

When in-order traversing a tree resulted in E A C K F H D B G; the preorder traversal would return?

• A.FAEKCDHGB
• B.FAEKCDHBG
• C.FAEKC DHGB
• D.FAKECDHGB

Past Paper MCQ

Graph with all nodes connected:

• A.Planar graph
• B.Bipartite graph
• C.Complete graph
• D.Sparse graph

Past Paper MCQ

In a complete graph?

• A.Every node is connected to every other node
• B.Every node has at most one edge
• C.No two nodes are connected
• D.Only adjacent nodes are connected

In programming, what can a null pointer represent?

• A.End of a linked list
• B.An uninitialized pointer
• C.An error condition
• D.All of these

Which operation is generally more efficient in a linked list than in an array?

• A.Inserting an element at the beginning
• B.Accessing an element by index
• C.Searching for a specific element
• D.Traversing all elements sequentially