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DoorDash Data Structures & Algorithms Interview Questions

Review this list of DoorDash Data Structures & Algorithms interview questions and answers verified by hiring managers and candidates.
  • DoorDash logoAsked at DoorDash 

    Given an array of task durations (in minutes), return the pairs of tasks that can be completed within 60 minutes. For example, for [1, 43, 20, 59, 30, 30], return [[0, 3], [4, 5]].

    2 answers

    "It's a 2Sum question with duplicate array elements."

    Anzhe M. - "It's a 2Sum question with duplicate array elements."See full answer

    Data Engineer
    Data Structures & Algorithms
    +1 more
  • DoorDash logoAsked at DoorDash 

    Find the closest number in a sorted array.

    2 answers

    "Binary Search on the array and after than compare the numbers at low and the high pointers whichever is closest is the answer. Because after the binary search low will be pointing to a number which is immediate greater than x and high will be pointing to a number which is immediate lesser than x. int low = 0; int high = n-1; while(low <= high){ int mid = (low + high) / 2; if(x == arr[mid]) return mid; //if x is already present then it will be the closest else if(x < arr[mid]) high"

    Shashwat K. - "Binary Search on the array and after than compare the numbers at low and the high pointers whichever is closest is the answer. Because after the binary search low will be pointing to a number which is immediate greater than x and high will be pointing to a number which is immediate lesser than x. int low = 0; int high = n-1; while(low <= high){ int mid = (low + high) / 2; if(x == arr[mid]) return mid; //if x is already present then it will be the closest else if(x < arr[mid]) high"See full answer

    Software Engineer
    Data Structures & Algorithms
    +1 more

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