Netflix Interview Questions (11+ Questions)

Learn how to test TCP connectivity to multiple service ports on a remote host using Linux Bash commands. This guide covers verifying reachability of critical services (SSH, DNS, HTTP, HTTPS, MySQL, gRPC) and generating structured connectivity reports, essential for diagnosing intermittent service failures and firewall configuration issues.

Eliminate accidentally committed sensitive files from entire Git history to prevent credential exposure. Rewrite all commits to remove secrets.env, regenerate commit hashes, force push updated history to remote, and verify file cannot be recovered from any commit. Essential for security incident response, credential leak remediation, compliance requirements, and preventing unauthorized access to exposed secrets in public or shared repositories.

def group_anagrams(strs: list[str]) -> list[list[str]]:
anagram_map = {}
for s in strs:
count = [0] * 26
for c in s:
count[ord(c) - ord('a')] += 1
signature = tuple(count)
if signature not in anagram_map:
anagram_map[signature] = []
anagram_map[signature].append(s)
return list(anagram_map.values())

def max_area_of_island(grid: list[list[int]]) -> int:
ROWS, COLS = len(grid), len(grid[0])
max_area = 0

def dfs(r, c):
    if r < 0 or r >= ROWS or c < 0 or c >= COLS or grid[r][c] == 0:
        return 0
        
    grid[r][c] = 0
    
    return (1 + 
            dfs(r + 1, c) + 
            dfs(r - 1, c) + 
            dfs(r, c + 1) + 
            dfs(r, c - 1))
            
for r in range(ROWS):
    for c in range(COLS):
        if grid[r][c] == 1:
            max_area = max(max_area, dfs(r, c))
            
return max_area

Generate a self-signed X.509 certificate and private key for a development HTTPS service with a specific validity period and Common Name.

How to Write a SQL Query to Retrieve Employee Names, Department Names, and Salaries

Objective

In this article, we will learn how to write a SQL query to retrieve the names of employees, their corresponding department names, and their salaries from the given employees and departments tabl...

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Filter a streaming platform DataFrame based on multiple conditions.

Master time series calculations in PySpark. Learn how to combine datasets, use the lag window function to retrieve previous row values, and handle gaps in chronological data using conditional logic.

SELECT
SUM(
CASE
WHEN device_type = 'laptop' THEN 1
ELSE 0
END
) AS laptop_views,
SUM(
CASE
WHEN device_type IN ('tablet', 'phone') THEN 1
ELSE 0
END
) AS mobile_views
FROM
viewership;

Google Cloud Storage handles petabytes of data for millions of users worldwide. QA testing of Cloud Storage APIs requires comprehensive validation of bucket operations, permission management, and metrics monitoring to ensure reliable cloud infrastructure services....

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LinkedIn connects over 900 million professionals worldwide, serving as the leading platform for professional networking, career development, and business relationships. QA testing of LinkedIn APIs requires comprehensive validation of profile management, connection requests, content sharing, and comp...

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