Which tech company has the most difficult interview?

When it comes to the toughest tech interviews, Google and Meta (formerly Facebook) are often at the top of the list. These companies are known for their rigorous and challenging interview processes, which test both your problem-solving skills and system design expertise.

Why Google and Meta are Challenging

1. Problem-solving: Both companies put a heavy emphasis on solving algorithmic problems that require deep understanding of data structures and algorithms. You’ll often face problems involving graph traversal, dynamic programming, and even advanced topics like concurrency and parallel processing.

2. System Design: Meta, in particular, is known for its extremely detailed system design questions. Candidates are expected to design scalable, fault-tolerant systems that handle millions of users, which requires knowledge of distributed systems and database scaling.

3. Behavioral interviews: Both companies also focus on the "soft" side. Google emphasizes its "Googleyness" in candidates, looking for cultural fit along with technical ability. Meta examines your leadership skills, decision-making, and how you handle high-pressure situations.

4. Interview format: They both utilize multiple rounds, including coding interviews, system design, and behavioral assessments, which can last hours or even days.

How to Prepare

If you're aiming for roles at these top tech companies, it’s essential to focus on both coding and system design. Here are some great resources to help you get started:

• Grokking the Coding Interview: Patterns for Coding Questions helps you tackle algorithmic challenges in a structured way.
• Grokking the System Design Interview is a go-to guide for acing system design interviews.
• Grokking Modern Behavioral Interview helps you prepare for the non-technical aspects, like teamwork and problem-solving under pressure.

These resources will give you the right structure and guidance to tackle even the most complex interviews.