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## Binary Trees using Linked Lists MCQs

**1. Level order traversal of a tree is formed with the help of**

a) breadth first search

b) depth first search

c) dijkstra’s algorithm

d) prims algorithm

**Answer: **breadth first search

**2. Identify the reason which doesn’t play a key role to use threaded binary trees?**

a) The storage required by stack and queue is more

b) The pointers in most of nodes of a binary tree are NULL

c) It is Difficult to find a successor node

d) They occupy less size

**Answer: **They occupy less size

**3. Advantages of linked list representation of binary trees over arrays?**

a) dynamic size

b) ease of insertion/deletion

c) ease in randomly accessing a node

d) both dynamic size and ease in insertion/deletion

**Answer: **both dynamic size and ease in insertion/deletion

**4. What is the code below trying to print?**

```
void print(tree *root,tree *node)
{
if(root ==null) return 0
if(root-->left==node || root-->right==node) || print(root->left,node)
||printf(root->right,node)
{
print(root->data)
}
}
```

a) just printing all nodes

b) not a valid logic to do any task

c) printing ancestors of a node passed as argument

d) printing nodes from leaf node to a node passed as argument

**Answer: **printing ancestors of a node passed as argument

**5. Disadvantages of linked list representation of binary trees over arrays?**

a) Randomly accessing is not possible

b) Extra memory for a pointer is needed with every element in the list

c) Difficulty in deletion

d) Random access is not possible and extra memory with every element

**Answer: **Random access is not possible and extra memory with every element

**6. Which of the following traversing algorithm is not used to traverse in a tree?**

a) Post order

b) Pre order

c) Post order

d) Randomized

**Answer: **Randomized

**7. The following lines talks about deleting a node in a binary tree.(the tree property must not be violated after deletion)**

i) from root search for the node to be deleted

ii)

iii) delete the node at

what must be statement ii) and fill up statement iii)

a) ii)-find random node,replace with node to be deleted. iii)- delete the node

b) ii)-find node to be deleted. iii)- delete the node at found location

c) ii)-find deepest node,replace with node to be deleted. iii)- delete a node

d) ii)-find deepest node,replace with node to be deleted. iii)- delete the deepest node

**Answer: **ii)-find deepest node,replace with node to be deleted. iii)- delete the deepest node

**8. What may be the psuedo code for finding the size of a tree?**

a) find_size(root_node–>left_node) + 1 + find_size(root_node–>right_node)

b) find_size(root_node–>left_node) + find_size(root_node–>right_node)

c) find_size(root_node–>right_node) – 1

d) find_size(root_node–>left_node + 1

**Answer: **find_size(root_node–>left_node) + 1 + find_size(root_node–>right_node)

## Binary Trees using Linked Lists MCQs PDF Download

### 1000+-Data-Structure-MCQs

Abstract Data Types |

Application of Stacks |

Arrays Types |

Types of Lists |

Binary Trees |

B Trees |

Trees |

Heap |

Trie |

Hash Tables |

Graph |