Skip to contentSkip to footer

Lead Software Engineer In Test Interview Questions

Salaries
Interviews

6,459 lead software engineer in test interview questions shared by candidates

## 1. Count Valid Endpoint Combinations You are given - `S`: total number of servers - `C`: total number of clients - You need to **select exactly `K` endpoints** such that - At least `minS` of them are servers - At least 10 of them are clients. You are to compute how many valid combinations of endpoints you can select from the given servers and clients that satisfy all constraints. ### ✅Constraints: - `0 ≤ min S ≤ S ≤ 1000` - `0 ≤ min C ≤ C ≤ 1000` - `0 ≤ K ≤ S + C` - Use combinatorics to calculate combinations efficiently. - **Return the result modulo `10^9 + 7`**, as it can be very large. Input: S = 3, C = 1, minS = 1, minC = 0, K = 2 Output: 6 Input: S = 2, C = 3, minS = 1, minC = 1, K = 2 Output: 6 Input: S = 1, C = 3, minS = 2, minC = 1, K = 3 Output: 0 # 2. **Grey Level of Satellite Imagery** You are given a 2D grid of binary strings where each character is either `'0'` or `'1'`. This grid represents a black-and-white satellite image. Your task is to compute the **grey level value** of each cell based on the following rule: For each cell `(i, j)`in the grid: - Count the number of `'1'`s in **row `i`** and **column `j`.** - Count the number of `'0'`s in **row `i`** and **column `j`.** - The transformed value at `(i, j)` is ```markdown grey_level[i][j] = (ones_in_row[i] + ones_in_col[j]) - (zeros_in_row[i] + zeros_in_col[j]) ``` Return the **maximum value** among all the computed grey levels. Also, for debugging purposes, output the transformed grid.
avatar

Software Development Engineer In Test (SDET)

Interviewed at D. E. Shaw India

4.2★
Aug 13, 2025

## 1. Count Valid Endpoint Combinations You are given - `S`: total number of servers - `C`: total number of clients - You need to **select exactly `K` endpoints** such that - At least `minS` of them are servers - At least 10 of them are clients. You are to compute how many valid combinations of endpoints you can select from the given servers and clients that satisfy all constraints. ### ✅Constraints: - `0 ≤ min S ≤ S ≤ 1000` - `0 ≤ min C ≤ C ≤ 1000` - `0 ≤ K ≤ S + C` - Use combinatorics to calculate combinations efficiently. - **Return the result modulo `10^9 + 7`**, as it can be very large. Input: S = 3, C = 1, minS = 1, minC = 0, K = 2 Output: 6 Input: S = 2, C = 3, minS = 1, minC = 1, K = 2 Output: 6 Input: S = 1, C = 3, minS = 2, minC = 1, K = 3 Output: 0 # 2. **Grey Level of Satellite Imagery** You are given a 2D grid of binary strings where each character is either `'0'` or `'1'`. This grid represents a black-and-white satellite image. Your task is to compute the **grey level value** of each cell based on the following rule: For each cell `(i, j)`in the grid: - Count the number of `'1'`s in **row `i`** and **column `j`.** - Count the number of `'0'`s in **row `i`** and **column `j`.** - The transformed value at `(i, j)` is ```markdown grey_level[i][j] = (ones_in_row[i] + ones_in_col[j]) - (zeros_in_row[i] + zeros_in_col[j]) ``` Return the **maximum value** among all the computed grey levels. Also, for debugging purposes, output the transformed grid.

1. Coding and DSA: Write a function to reverse a linked list. Find the first non-repeating character in a string. Merge two sorted arrays without using extra space. Detect a cycle in a linked list. 2. Testing Scenarios and Automation: How would you design a test automation framework for a web application? Write a script to scrape data from a web page. Explain the test cases for an online payment gateway. How would you test the search functionality on Amazon’s website?
avatar

Software Development Engineer In Test (SDET)

Interviewed at Amazon

3.5★
Nov 6, 2024

1. Coding and DSA: Write a function to reverse a linked list. Find the first non-repeating character in a string. Merge two sorted arrays without using extra space. Detect a cycle in a linked list. 2. Testing Scenarios and Automation: How would you design a test automation framework for a web application? Write a script to scrape data from a web page. Explain the test cases for an online payment gateway. How would you test the search functionality on Amazon’s website?

Viewing 1961 - 1970 interview questions

Glassdoor has 6,459 interview questions and reports from Lead software engineer in test interviews. Prepare for your interview. Get hired. Love your job.