Word Break Problem in DSA Typescript - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the Word Break Problem?

It is a problem where you check if a given string can be split into a sequence of one or more dictionary words.

beginner

What data structure is commonly used to store the dictionary in the Word Break Problem?

A set or hash set is commonly used for fast lookup of dictionary words.

intermediate

What is the main approach to solve the Word Break Problem efficiently?

Use dynamic programming to check substrings and store results to avoid repeated work.

intermediate

In the dynamic programming solution, what does the boolean array represent?

Each position in the array shows if the substring up to that position can be segmented into dictionary words.

beginner

Why is the Word Break Problem important in real life?

It helps in text processing tasks like spell checking, word segmentation in languages without spaces, and autocomplete.

What does the Word Break Problem ask you to determine?

A If a string contains only vowels

B If a string is a palindrome

C If a string can be split into dictionary words

D If a string is sorted alphabetically

The problem checks if the string can be segmented into valid dictionary words.

Which technique is best suited to solve the Word Break Problem efficiently?

A Dynamic Programming

B Greedy Algorithm

C Depth First Search without memoization

D Sorting

Dynamic Programming avoids repeated checks by storing intermediate results.

What does the boolean array in the DP solution represent?

A If substring up to index can be segmented

B If substring is a palindrome

C If substring contains digits

D If substring is empty

Each boolean value shows if the substring up to that index can be formed by dictionary words.

Which data structure is commonly used to store dictionary words for quick lookup?

A Linked List

B Set or HashSet

C Stack

D Queue

Sets provide O(1) average time complexity for lookups.

If the input string is empty, what should the Word Break Problem return?

A False

B Null

C Error

D True

An empty string can be considered segmented trivially.

Explain how dynamic programming helps solve the Word Break Problem.

Think about how you remember which parts of the string can be segmented.

Describe the role of the dictionary in the Word Break Problem and how it is used.

The dictionary is like a word list you trust.