Multi-Language (Coding): Unique Paths in Grid Test

This test library assesses the candidate of logical thinking in dynamic programming

Available in

  • English

Summarize this test and see how it helps assess top talent with:

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1 Skills measured

  • Dynamic Programming

Test Type

Coding Test

Duration

25 mins

Level

Intermediate

Questions

1

Use of Multi-Language (Coding): Unique Paths in Grid Test

The problem involves finding the number of unique paths that a robot can take to reach the bottom-right corner of an m x n grid, while moving only down or right. We can use dynamic programming to solve this problem efficiently by storing the number of paths to reach each cell in a 2D array. The algorithm fills up the array using a recurrence relation based on the fact that the only ways to reach a given cell are to either come from the cell above it or the cell to its left. Finally, we return the number of paths to reach the bottom-right corner, which is stored in the last cell of the array. The code uses Python to implement this algorithm and takes in the dimensions of the grid as input to compute the answer.

Skills measured

Dynamic Programming is a crucial skill in solving the Unique Paths problem in a given grid. By breaking down the problem into smaller subproblems and storing the results in a table, Dynamic Programming allows for efficient computation of the total number of unique paths. This technique eliminates redundant calculations and significantly improves the time complexity of the solution. By utilizing Dynamic Programming, programmers can solve complex problems like finding unique paths in a grid in an optimized and scalable manner.

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Recruiter efficiency

6x

Recruiter efficiency

Decrease in time to hire

55%

Decrease in time to hire

Candidate satisfaction

94%

Candidate satisfaction

Subject Matter Expert Test

The Multi-Language (Coding): Unique Paths in Grid Subject Matter Expert

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