10+ LumiraDx Interview Questions and Answers

There are 10 stacks of 10 coins each. Each coin weighs 10 grams. However, one stack of coins is the lightest, and each coin in that stack weighs only 9 grams. What is the minimum number of weights you nee...read more

You have been given an integer array/list(ARR) of size N that contains only integers, 0 and 1. Write a function to sort this array/list. Think of a solution which scans the array/list only once and don'...read more

Ninja is given an array of integers that contain numbers in random order. He needs to write a program to find and return the number which occurs the maximum times in the given input. He ...read more

Given an array of numbers, find the maximum sum of any contiguous subarray of the array.

For example, given the array [34, -50, 42, 14, -5, 86], the maximum sum would be 137, since we would ...read more

You are Harshad Mehta’s friend. He told you the price of a particular stock for the next ‘N’ days. You can either buy or sell a stock. Also, you can only complete at most 2-transactions. Find ...read more

Given a singly linked list of integers. Your task is to return the head of the reversed linked list.

For example:

The given linked list is 1 -> 2 -> 3 -> 4-> NULL. Then the reverse linked lis...read more

You are given an array of integers 'ARR' of size 'N' and another integer 'K'. Your task is to find and return 'K'th smallest value present in the array.

Note: All the elements in the array a...read more

You have been given a long type array/list 'ARR' of size 'N'. It represents an elevation map wherein 'ARR[i]' denotes the elevation of the 'ith' bar. Print the total amount of rainwater that...read more

You have been given a binary matrix of size 'N' * 'M' where each element is either 0 or 1. You are also given a source and a destination cell, both of them lie within the matrix....read more

You have been given an integer ‘N’. You are supposed to find if the given integer ‘N’ is a perfect square or not. A perfect square is an integer that is the square of an integer.

Input Forma...read more

Given a binary tree, print its bottom view from left to right. Assume, the left and the right child make a 45-degree angle with the parent.

A binary tree is a tree in which each parent...read more

You are given string S of length N, and an integer K. Your task is to find the length of the longest substring that contains at most K distinct characters.

I...read more

You are given an array/list 'ARR' consisting of N integers, which contains elements only in the range 0 to N - 1. Some of the elements may be repeated in 'ARR'. Your task is to find all ...read more

Given a sequence of numbers ‘ARR’. Your task is to return a sorted sequence of ‘ARR’ in non-descending order with help of the merge sort algorithm.

Example :

Merge Sort Algorithm - Merge sort is a Div...read more

Ninja wants to travel from his house to his best friend’s house. The houses are located on a 2D coordinate plane, with Ninja’s house being situated at the origin. Ninja’s friend’s house is locate...read more

It was an android specific question on how to implement multiple recycler views on a magnified screen.

Implement various activities with a cart activity in an e-commerce app.