Data Structures & Algorithms (Leetcode Medium/Hard)
Graph Algorithms
Dynamic Programming
Bit Manipulation Problems
Recursion and Backtracking
Sorting & Searching Optimization
System Design (Scalable, Distributed Systems)
API Design for Scale
Concurrency and Threading
Cloud Architecture
Machine Learning System Design Basics
Database Design at Scale (Sharding, Partitioning)
Behavioral: Googleyness (teamwork, curiosity)
Ambiguity Handling Scenarios
Collaborative Problem Solving
Product Impact Thinking
Failure Analysis
Metrics-Driven Design Decisions
Security and Privacy Engineering
Accessibility and Inclusive Design Challenges
Example Questions:
Implement LRU Cache from scratch.
Design the backend for Google Maps (scalability focus).
Find the longest substring without repeating characters.
How would you design Google Calendar for billions of users?
Design a global file storage system like Google Drive.
Find all anagrams in a string.
How would you optimize autocomplete suggestions at scale?
How do you handle concurrency issues in a chat application?
Design a URL shortener service like goo.gl.
How would you optimize YouTube’s video delivery globally?
Describe a time you solved a vague or undefined problem creatively.
Find the median of two sorted arrays.
How would you design a news recommendation engine?
Design a scalable messaging service similar to WhatsApp.
Detect cycles in a directed graph.
How do you decide between performance and maintainability?
Describe your approach to designing APIs used by millions.
Tell me about a time you turned failure into innovation.
Explain how you’d scale a product from 1M to 1B users.
How would you improve the energy efficiency of Google's data centers?
Behavioral Tips: Emphasize **collaboration, curiosity, user impact, problem-solving at scale, and efficiency.** Google values innovation, humility, and engineering excellence tied to real-world outcomes. Demonstrate creativity under ambiguity and a focus on scalable solutions.
Apple
Core Focus:
Craftsmanship
Detail Orientation
Problem Solving
Ownership
User-Centric Design
Design Precision
Hardware-Software Integration
Privacy & Security
Performance Optimization
Creativity in Engineering
Types of Questions:
Core Technical Questions (C, C++, Swift)
Hardware-Software Optimization Challenges
Algorithm & Data Structures (Leetcode Medium)
Memory Management and Low-Level Programming
iOS/MacOS Framework Usage
Concurrency and Threading
Performance Optimization Techniques
System Design for Consumer Hardware
Product Quality and User Experience Scenarios
UI/UX Trade-off Discussions
Communication Clarity in Technical Teams
Detail-Oriented Debugging
Failure and Resilience Engineering
Accessibility and Inclusive Design
Cross-Team Collaboration
Security and Privacy-First Design
Testing and Verification Strategies
Real-World Problem Solving in Hardware Context
Behavioral Questions Focused on Ownership
Ethical Responsibility in Tech Design
Example Questions:
How would you optimize battery life in a mobile device?
How would you handle a disagreement with a designer over UX?
Tell us about a project where extreme attention to detail mattered.
How would you ensure data privacy in a new iOS feature?
Explain how you would optimize app launch time on iOS.
Describe how you debug a memory leak in C++.
What is your approach to writing secure code for consumer devices?
How would you redesign the Apple Watch for elderly users?
How do you approach balancing performance vs. battery life?
Tell us about a time your work directly improved user experience.
How would you design a photo storage system for iPhone?
Describe how you would improve the accessibility of a Mac app.
How do you collaborate effectively with hardware teams?
What are the trade-offs between app responsiveness and power consumption?
How do you ensure a seamless experience across Apple’s hardware ecosystem?
How would you test a new device feature before launch?
Describe a time you solved a complex problem under time pressure.
How would you design a system that preserves user privacy without sacrificing usability?
Explain your approach to implementing new features with backwards compatibility in mind.
How would you manage communication breakdowns across large cross-functional teams?
Behavioral Tips: Show passion for **quality, detail, user experience, security, and precision**. Apple values people who care deeply about the craft, obsess over the user, and think long-term about product integrity and excellence.
Facebook (Meta)
Core Focus:
Impact
Scalability
Move Fast / Bias for Action
Product Thinking
Problem-Solving
Engineering Excellence
Collaboration
User-Centric Solutions
Data-Driven Decisions
Innovation at Scale
Types of Questions:
Data Structures & Algorithms (Leetcode Medium/Hard)
System Design for Large-Scale Systems
Product Sense and Problem Solving
API Design and Integration
Concurrency and Parallelism
Real-Time Data Systems
Machine Learning Product Questions (Optional)
Performance Optimization
Data-Driven Decision Making
Designing for User Engagement
Behavioral: Impact & Ownership
Handling Ambiguity
Collaboration Across Teams
Security & Privacy by Design
Accessibility and Inclusive Design
Behavioral: How You Handle Failure
Product Improvement Proposals
Metrics and KPIs Definition
Debugging Complex Distributed Systems
Communication Clarity and Influence
Example Questions:
Design Facebook News Feed from a backend perspective.
Find the longest palindromic substring in a string.
How would you improve Facebook Groups for user engagement?
Implement a rate limiter for an API at scale.
Design a scalable notification system.
How would you handle and mitigate service outages in real-time systems?
Describe a time you delivered significant impact under tight deadlines.
Detect and remove cycles in a linked list.
Design Instagram Stories backend for high scalability.
Explain your approach to debugging live production issues at scale.
How would you design Facebook’s ad delivery algorithm?
Describe a time you failed and how you grew from it.
Design a comment-ranking algorithm for user engagement.
Describe your strategy for minimizing latency in messaging services.
Find the kth largest element in an unsorted array.
How would you scale the photo storage backend?
What metrics would you track to measure success on a new Messenger feature?
How do you prioritize features for rapid delivery vs. long-term scalability?
Design a system to detect fake accounts or spam at scale.
Describe your approach when asked to lead a project with vague requirements.
Behavioral Tips: Emphasize **impact, speed, ownership, scalability, and clear communication.** Meta values people who deliver fast, think big, stay data-driven, and obsess over user engagement while solving complex problems creatively.
Amazon
Core Focus:
Leadership Principles
Ownership
Data-Driven Decision Making
Efficiency
Customer Obsession
Invent and Simplify
Bias for Action
Deliver Results
Earn Trust
Think Big
Types of Questions:
Behavioral Questions (Leadership Principles)
STAR-Format Behavioral Storytelling
Data-Driven Decision-Making Scenarios
Efficiency and Optimization Problem-Solving
Product Design Thinking
Scalable Systems Design
Algorithm Challenges (Leetcode Medium/Hard)
Ownership in Difficult Situations
Conflicting Priorities Scenarios
Building vs. Buying Decisions
Root Cause Analysis (5 Whys Technique)
Failure Recovery and Resilience Planning
Process Improvement Examples
Customer-First Thinking
Metrics-Driven Decision Making
Stakeholder Management Challenges
Team Management and Leadership Scenarios
Innovation and Simplification Questions
Handling Ambiguity in Projects
Dealing with Underperformance in Teams
Example Questions:
Tell me about a time you disagreed with your manager and how you handled it.
How would you design an online bookstore to scale globally?
Describe a time when data contradicted leadership expectations and how you responded.
Tell me about a time you took ownership of a failing project and turned it around.
Describe a situation where you delivered results despite tight deadlines.
How did you identify and fix an inefficient process?
Tell me about a time you worked backwards from customer needs to build a solution.
How would you design a system to handle Amazon Prime Day traffic spikes?
Describe a time when you simplified a complex process or system.
Tell me about a time when you challenged the status quo with data.
Describe how you managed conflicting priorities in a high-pressure environment.
How would you improve efficiency in Amazon's supply chain?
Give an example of how you influenced a key stakeholder to change direction.
Tell me about a time you had to make a quick decision with incomplete data.
Describe how you handled a mistake that impacted customers.
How would you design an automated returns management system for Amazon?
How have you driven innovation in your previous roles?
How do you ensure customer obsession in product design decisions?
Describe a time when your project required collaboration across multiple teams.
Tell me about a time you helped a struggling team member improve their performance.
Behavioral Tips: Always answer using the STAR method (Situation, Task, Action, Result). Focus on **Ownership, Customer Obsession, Data-Driven Impact, and Results**. Quantify your achievements and align your answers explicitly with Amazon’s Leadership Principles.
Microsoft
Core Focus:
Collaboration
Growth Mindset
Product Impact
User-Centric Design
Scalability & Performance
Cloud Computing (Azure)
Business Impact
Problem-Solving at Scale
Types of Questions:
Coding Challenges (Leetcode Medium/Hard)
Object-Oriented Programming
Data Structures and Algorithms
System Design (Scalable Services)
API Design and Integration
Cloud Architecture (Azure Focus)
SQL and Database Optimization
Concurrency and Multithreading
Behavioral: Growth Mindset, Collaboration
Behavioral: Diversity & Inclusion Scenarios
Behavioral: Dealing with Failure
Leadership Potential and Ownership
Product Vision and Innovation
Customer-Centric Problem Solving
Debugging Complex Systems
Security Best Practices
Performance Optimization
Scenario-Based Product Thinking
Design for Accessibility & Inclusion
Data-Driven Decision-Making
Example Questions:
Design a calendar app for teams collaborating across time zones.
Debug a performance issue in a distributed system.
How do you handle feedback you fundamentally disagree with?
How would you redesign Outlook for Gen Z users?
How would you prioritize conflicting feature requests for a new Microsoft Teams feature?
Design a file-sharing service similar to OneDrive with scalability in mind.
How do you ensure your solutions are inclusive and accessible?
How would you improve user retention for Microsoft Edge?
Describe a time when you failed and what you learned.
How would you secure sensitive user data on Azure?
How would you resolve a conflict between engineers on your team?
Implement an autocomplete feature similar to Microsoft Word’s suggestions.
How would you design a system to sync data across devices in real time?
What metrics would you track to measure the success of a new Xbox feature?
How would you improve Azure’s user onboarding experience?
Describe a complex problem you solved in collaboration with others.
Explain how you would optimize an application’s performance on Windows.
Describe your approach to designing APIs for a large-scale enterprise application.
How would you approach designing a secure login system for millions of users?
Tell me about a time you turned feedback into a growth opportunity.
Behavioral Tips: Show adaptability, teamwork, curiosity to learn. Always tie your answers to measurable outcomes, user impact, collaboration, and alignment with Microsoft's values of inclusion, growth mindset, and making a difference through technology.
Africa is a continent full of opportunities for business growth and development. With a rapidly expanding economy and a growing middle class, many companies are starting to tap into the market potential of this diverse region. One key aspect of doing business in Africa is having an efficient and reliable delivery system in place.
Africa is a continent of vast potential and opportunities for businesses - and Athens is increasingly becoming a key player in this dynamic relationship. The business landscape in Africa is evolving rapidly, with growing economies, a rising middle class, and increasing urbanization creating new markets and business prospects.
Africa is a continent of vast potential and numerous opportunities for business growth. One particular industry that has been steadily gaining traction in Africa is the tech sector. Companies like Apple have been eyeing the African market as a hub for growth and expansion, leading to an increase in job opportunities for local talent.
