Practice Two Sum - 9.4.1 | 9. Apply Data Structures and Algorithms to Solve Real-World Programming Challenges | Data Structure
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Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What is the time complexity of the naive approach for the Two Sum problem?

πŸ’‘ Hint: Consider how many times you would need to iterate through the array.

Question 2

Easy

Why is the hash map approach preferred over the naive method?

πŸ’‘ Hint: Focus on the efficiency of accessing elements.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What is the primary goal of the Two Sum problem?

  • To sort an array
  • To find two indices with a specific sum
  • To identify duplicates

πŸ’‘ Hint: Recall the definition we discussed earlier.

Question 2

The optimal solution for Two Sum uses which data structure?

  • Array
  • Linked List
  • Hash Map

πŸ’‘ Hint: Think about what structures give us quick access to elements.

Solve 2 more questions and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

Design an algorithm that finds more than two pairs in an array that sum to the target without duplicates.

πŸ’‘ Hint: How would you adjust your approach to store multiple pairs?

Question 2

Create a variant of the Two Sum problem where the array is sorted in ascending order. How would the approach change and what would be the time complexity?

πŸ’‘ Hint: Consider how sorting changes the way you would access elements.

Challenge and get performance evaluation