SDE-1 Position

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SDE-1 Position Interview Questions and Answers

Updated 16 Oct 2021

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Q1. Design covid -19 vaccintion booking system feature include: user registration with unique id,capacity of center,cancel booking, list wher vaccination is present

Ans.

Design a covid-19 vaccination booking system with user registration, center capacity, cancel booking, and location listing.

  • Create a user registration system with unique IDs

  • Implement a center capacity tracker to ensure availability

  • Include a cancel booking feature for users

  • List all locations where vaccinations are available

  • Ensure data privacy and security measures are in place

Q2. Contiguous Subarray with sum = 0

Ans.

Find all contiguous subarrays in an array with sum equal to zero.

  • Use a hash table to store the sum of subarrays and their ending index.

  • Traverse the array and calculate the sum of subarrays.

  • If the sum is zero or already exists in the hash table, print the subarray.

  • Time complexity: O(n), Space complexity: O(n).

Q3. Add one to linked list

Ans.

To add one to a linked list, traverse the list and add 1 to the last node's value. If it overflows, create a new node.

  • Traverse the linked list until the last node

  • Add 1 to the value of the last node

  • If the value overflows, create a new node with value 1 and add it to the end of the list

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