TikTok New Grad 2nd Round VO Review | Highlighting Logic & Math

📋 Interview Info

• Company: TikTok
• Role: New Grad SDE
• Round: 2nd VO
• Duration: 45 mins
• Interviewer: Senior Engineer

🎯 Interview Process

Just helped a student ace the TikTok New Grad 2nd VO. This round heavily tested logical clarity and mathematical thinking.

Part 1: Algorithm (30 mins)

Type: Array + Two Pointers

A medium-difficulty two-pointer problem: Find a subarray meeting specific conditions.

Key Points:

• Flexible Two Pointer usage
• Boundary handling
• Complexity optimization

def solve(arr, target):
    left, right = 0, 0
    current_sum = 0
    result = []
    
    while right < len(arr):
        current_sum += arr[right]
        
        while current_sum > target and left <= right:
            current_sum -= arr[left]
            left += 1
        
        if current_sum == target:
            result.append(arr[left:right+1])
        
        right += 1
    return result

Part 2: Project Deep Dive (10 mins)

• Challenge: "What was the hardest bug you fixed?"
• Collaboration: "Conflict resolution with teammates."

Part 3: Q&A (5 mins)

• Tech stack at TikTok?
• Team culture?

💡 Summary

🎓 Prep Tips

Algorithm

• LeetCode Two Pointers (20+ questions)
• Whiteboard coding practice

System Design

• Understand TikTok's core business/tech stack
• Basic distributed systems concepts

Behavioral

• Prepare 2-3 STAR stories
• Understand TikTok's culture

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