Licious Coding Questions - DSA Problems & Solutions

Company Overview

This page contains Licious coding questions from Licious OA placement papers with detailed solutions.

Coding Focus

Licious OA coding section includes 2-3 problems focusing on DSA and e-commerce concepts. Master arrays, trees, graphs, and system design to succeed.

Licious Coding Questions Overview

Licious OA Coding Section:

• Problems: 2-3 coding problems
• Time: 90 minutes
• Languages: Java, Python, JavaScript

Coding Problems

Question 1: Product Recommendation

Q1: Recommend products to users based on purchase history.

Solution (Java):

public List<String> recommendProducts(String userId, Map<String, List<String>> purchaseHistory) {
    List<String> userPurchases = purchaseHistory.getOrDefault(userId, new ArrayList<>());
    Map<String, Integer> productFrequency = new HashMap<>();

    // Find products frequently bought together
    for (String purchase : userPurchases) {
        for (String otherPurchase : userPurchases) {
            if (!purchase.equals(otherPurchase)) {
                productFrequency.put(otherPurchase,
                    productFrequency.getOrDefault(otherPurchase, 0) + 1);
            }
        }
    }

    return productFrequency.entrySet().stream()
        .sorted((a, b) -> Integer.compare(b.getValue(), a.getValue()))
        .limit(5)
        .map(Map.Entry::getKey)
        .collect(Collectors.toList());
}

Time Complexity: O(n²)

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