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DSA Goprogramming~5 mins

Word Search in Trie in DSA Go - Cheat Sheet & Quick Revision

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Recall & Review
beginner
What is a Trie data structure?
A Trie is a tree-like data structure used to store a dynamic set of strings where keys are usually strings. Each node represents a character, and paths from root to nodes represent prefixes of words.
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beginner
How does a Trie help in word search?
A Trie allows fast prefix-based search by traversing nodes corresponding to characters of the word. If traversal reaches the end of the word and the node marks a word end, the word exists in the Trie.
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beginner
What does the 'isEnd' flag in a Trie node represent?
The 'isEnd' flag indicates that the path from the root to this node forms a complete word stored in the Trie.
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intermediate
In Go, how do you represent children nodes in a Trie?
Children nodes are typically represented as a map from rune (character) to *TrieNode, allowing dynamic branching for each character.
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intermediate
What is the time complexity of searching a word in a Trie?
The time complexity is O(m), where m is the length of the word, because we traverse one node per character.
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What does each node in a Trie represent?
AAn integer value
BA character of a word
CA whole word
DA number of words
What does the 'isEnd' flag in a Trie node indicate?
AThe node is a leaf
BThe node is the root
CThe node has no children
DThe node marks the end of a word
What is the best data type to store children nodes in a Go Trie implementation?
AMap from rune to *TrieNode
BBoolean array
CArray of integers
DSlice of strings
What is the time complexity to search a word of length m in a Trie?
AO(m)
BO(1)
CO(log m)
DO(m^2)
If a word is not in the Trie, what happens during search?
ASearch returns true anyway
BSearch loops infinitely
CSearch fails when a character node is missing
DSearch returns the closest word
Explain how to search for a word in a Trie step-by-step.
Think about walking down the tree one letter at a time.
You got /6 concepts.
    Describe the structure of a Trie node in Go for word search.
    Focus on how children and word end are represented.
    You got /3 concepts.