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Amazon Software Engineer Interview Questions, Process, and Tips
Updated
27 Feb 2025
Top Amazon Software Engineer Interview Questions and Answers
- Q1. Reverse a Singly Linked List Given a singly linked list of integers, your task is to return the head of the reversed linked list. Explanation: Reverse a given singly lin ...read more
- Q2. Sum Between Zeroes Problem Statement Given a singly linked list containing a series of integers separated by the integer '0', modify the list by merging nodes between tw ...read more
- Q3. Reverse Linked List Problem Statement Given a singly linked list of integers, your task is to return the head of the reversed linked list. Example: Input: The given link ...read more
Amazon Software Engineer Interview Experiences
77 interviews found
test goyal
Interview experience
Average
Difficulty level
Hard
Process Duration
2-4 weeks
Result
Selected
I was interviewed in Jan 2025.
Round 1 - Interview Questions
(20 Questions)
- Q1. Explain the difference between ArrayList and LinkedList in Java. When would you choose one over the other?
- Q2. What are the advantages and disadvantages of using Java’s synchronized keyword for thread synchronization? Can you explain how the ReentrantLock compares to synchronized?
- Q3. What is the difference between == and .equals() in Java? When should each be used, and what issues can arise from improper usage?
- Q4. How does the Java garbage collector work? Can you describe the different types of garbage collection algorithms available in Java?
- Q5. What are the main features of Java 8? Can you explain how lambdas and the Stream API have changed the way Java applications are written?
- Q6. Describe the differences between checked and unchecked exceptions in Java. Provide examples and explain how to handle them properly.
- Q7. What is the Java Memory Model, and how does it affect multithreading and synchronization? How does volatile help ensure memory visibility?
- Q8. Can you explain the difference between method overloading and method overriding in Java? Provide examples where each should be used.
- Q9. What are functional interfaces in Java? How do they work with lambda expressions? Provide an example of a custom functional interface.
- Q10. What is a Java Stream, and how does it differ from an Iterator? Explain how Streams can be used to process collections efficiently.
- Q11. Explain the concept of immutability in Java. How does the String class achieve immutability, and what are the advantages of immutable objects?
- Q12. What is the difference between final, finally, and finalize in Java? Provide examples to illustrate their usage.
- Q13. Explain the Singleton design pattern in Java. How can you implement it safely to ensure thread safety?
- Q14. What are Java annotations, and how are they used in frameworks like Spring? Explain the difference between built-in and custom annotations.
- Q15. How do Java Streams handle parallel processing? What are the potential pitfalls of using parallel streams, and how can they be mitigated?
- Q16. Explain the difference between ArrayList and LinkedList in Java. ArrayList is implemented as a dynamic array, while LinkedList is a doubly linked list. ArrayList provides fast random access (O(1) complexi...
- Q17. What are the advantages and disadvantages of using Java’s synchronized keyword for thread synchronization? The synchronized keyword ensures that only one thread can access a block of code at a time. It pr...
- Q18. What is the difference between == and .equals() in Java? == checks for reference equality, meaning it compares memory addresses. equals() checks for value equality, which can be overridden in user-defined...
- Q19. How does the Java garbage collector work? Garbage collection in Java automatically reclaims memory occupied by unused objects. The JVM has different types of GC algorithms, including Serial, Parallel, CMS...
- Q20. What are the main features of Java 8? Java 8 introduced lambda expressions, enabling functional-style programming. The Stream API allows efficient data processing with map, filter, and reduce operations. ...
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Interview experience
Average
Difficulty level
Hard
Process Duration
2-4 weeks
Result
Selected
I was interviewed in Jan 2025.
Round 1 - Interview Questions
(20 Questions)
- Q1. Explain the difference between ArrayList and LinkedList in Java. When would you choose one over the other?
- Q2. What are the advantages and disadvantages of using Java’s synchronized keyword for thread synchronization? Can you explain how the ReentrantLock compares to synchronized?
- Q3. What is the difference between == and .equals() in Java? When should each be used, and what issues can arise from improper usage?
- Q4. How does the Java garbage collector work? Can you describe the different types of garbage collection algorithms available in Java?
- Q5. What are the main features of Java 8? Can you explain how lambdas and the Stream API have changed the way Java applications are written?
- Q6. Describe the differences between checked and unchecked exceptions in Java. Provide examples and explain how to handle them properly.
- Q7. What is the Java Memory Model, and how does it affect multithreading and synchronization? How does volatile help ensure memory visibility?
- Q8. Can you explain the difference between method overloading and method overriding in Java? Provide examples where each should be used.
- Q9. What are functional interfaces in Java? How do they work with lambda expressions? Provide an example of a custom functional interface.
- Q10. What is a Java Stream, and how does it differ from an Iterator? Explain how Streams can be used to process collections efficiently.
- Q11. Explain the concept of immutability in Java. How does the String class achieve immutability, and what are the advantages of immutable objects?
- Q12. What is the difference between final, finally, and finalize in Java? Provide examples to illustrate their usage.
- Q13. Explain the Singleton design pattern in Java. How can you implement it safely to ensure thread safety?
- Q14. What are Java annotations, and how are they used in frameworks like Spring? Explain the difference between built-in and custom annotations.
- Q15. How do Java Streams handle parallel processing? What are the potential pitfalls of using parallel streams, and how can they be mitigated?
- Q16. Explain the difference between ArrayList and LinkedList in Java. ArrayList is implemented as a dynamic array, while LinkedList is a doubly linked list. ArrayList provides fast random access (O(1) complexi...
- Q17. What are the advantages and disadvantages of using Java’s synchronized keyword for thread synchronization? The synchronized keyword ensures that only one thread can access a block of code at a time. It pr...
- Q18. What is the difference between == and .equals() in Java? == checks for reference equality, meaning it compares memory addresses. equals() checks for value equality, which can be overridden in user-defined...
- Q19. How does the Java garbage collector work? Garbage collection in Java automatically reclaims memory occupied by unused objects. The JVM has different types of GC algorithms, including Serial, Parallel, CMS...
- Q20. What are the main features of Java 8? Java 8 introduced lambda expressions, enabling functional-style programming. The Stream API allows efficient data processing with map, filter, and reduce operations. ...
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asked in
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Q2. In a dark room,there is a box of 18 white and 5 black gloves. You ... read more
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Q4. Tell me something about yourself. Define encapsulation. What is i ... read more
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Q5. Puzzle : 100 people are standing in a circle .each one is allowed ... read more
Aditi
Interview experience
Excellent
Difficulty level
Easy
Process Duration
2-4 weeks
Result
Selected
I was interviewed in Jan 2025.
Round 1 - Interview Questions
(20 Questions)
- Q1. Explain the difference between ArrayList and LinkedList in Java. When would you choose one over the other?
- Q2. What are the advantages and disadvantages of using Java’s synchronized keyword for thread synchronization? Can you explain how the ReentrantLock compares to synchronized?
- Q3. What is the difference between == and .equals() in Java? When should each be used, and what issues can arise from improper usage?
- Q4. How does the Java garbage collector work? Can you describe the different types of garbage collection algorithms available in Java?
- Q5. What are the main features of Java 8? Can you explain how lambdas and the Stream API have changed the way Java applications are written?
- Q6. Describe the differences between checked and unchecked exceptions in Java. Provide examples and explain how to handle them properly.
- Q7. What is the Java Memory Model, and how does it affect multithreading and synchronization? How does volatile help ensure memory visibility?
- Q8. Can you explain the difference between method overloading and method overriding in Java? Provide examples where each should be used.
- Q9. What are functional interfaces in Java? How do they work with lambda expressions? Provide an example of a custom functional interface.
- Q10. What is a Java Stream, and how does it differ from an Iterator? Explain how Streams can be used to process collections efficiently.
- Q11. Explain the concept of immutability in Java. How does the String class achieve immutability, and what are the advantages of immutable objects?
- Q12. What is the difference between final, finally, and finalize in Java? Provide examples to illustrate their usage.
- Q13. Explain the Singleton design pattern in Java. How can you implement it safely to ensure thread safety?
- Q14. What are Java annotations, and how are they used in frameworks like Spring? Explain the difference between built-in and custom annotations.
- Q15. How do Java Streams handle parallel processing? What are the potential pitfalls of using parallel streams, and how can they be mitigated?
- Q16. Explain the difference between ArrayList and LinkedList in Java. ArrayList is implemented as a dynamic array, while LinkedList is a doubly linked list. ArrayList provides fast random access (O(1) complexi...
- Q17. What are the advantages and disadvantages of using Java’s synchronized keyword for thread synchronization? The synchronized keyword ensures that only one thread can access a block of code at a time. It pr...
- Q18. What is the difference between == and .equals() in Java? == checks for reference equality, meaning it compares memory addresses. equals() checks for value equality, which can be overridden in user-defined...
- Q19. How does the Java garbage collector work? Garbage collection in Java automatically reclaims memory occupied by unused objects. The JVM has different types of GC algorithms, including Serial, Parallel, CMS...
- Q20. What are the main features of Java 8? Java 8 introduced lambda expressions, enabling functional-style programming. The Stream API allows efficient data processing with map, filter, and reduce operations. ...
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What people are saying about Amazon
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stubbornpanda
currently not working
Gave Amazon OA, still waiting for their response
Hey there, I gave amazon OA and work assessment around 30th Jan, 2024, after that I got an email saying successfully completed OA, but then I am still waiting and there is no response.
(Almost 2 weeks)
Any ...
read more
Got a question about Amazon?
Ask anonymously on communities.
Anonymous
Interview experience
Excellent
Difficulty level
Moderate
Process Duration
-
Result
Not Selected
Round 1 - One-on-one
(2 Questions)
- Q1. In an array where all elements are repeated twice, find an element that is repeated once
- Q2. Find the maximum diagonal sum of a binary tree
Add your answer
Add your answer
Amazon interview questions for designations
Interview experience
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Coding Test
3 leetcode hards, followed by some system design
Round 2 - Technical
(2 Questions)
- Q1. How to design amazon
- Ans.
Designing Amazon involves creating a user-friendly e-commerce platform with a vast product selection, efficient search and recommendation algorithms, secure payment processing, and reliable delivery logistics.
Develop a user-friendly interface for easy navigation and product search
Implement recommendation algorithms based on user behavior and preferences
Integrate secure payment processing systems to protect customer inf...
- Q2. How to invert 25 bst
- Ans.
To invert a binary search tree (BST), swap the left and right children of each node recursively.
Start from the root node and recursively swap the left and right children of each node.
Repeat this process for all nodes in the BST.
The final result will be the inverted BST.
Answered by
AI
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Answered by
AI
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Interview Preparation Tips
Interview preparation tips for other job seekers - pretty easy
Skills evaluated in this interview
Get interview-ready with Top Amazon Interview Questions
Interview experience
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Aptitude Test
The Aptitude was quite hard
Round 2 - Coding Test
The coding round was medium
Round 3 - One-on-one
(1 Question)
- Q1. They asked dsa, operating system, coding
Add your answer
Software Engineer Jobs at Amazon
Interview experience
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected
I applied via Naukri.com and was interviewed in May 2024. There were 3 interview rounds.
Round 1 - Coding Test
Coding questions based on DP
Round 2 - One-on-one
(2 Questions)
- Q1. Binary search based question
- Q2. Graph bfs based question
Add your answer
Add your answer
Round 3 - Technical
(2 Questions)
- Q1. Question related to my project
- Q2. Question based on dsa
Add your answer
Add your answer
Interview experience
Good
Difficulty level
Moderate
Process Duration
-
Result
Selected
I applied via Referral
Round 1 - Coding Test
2 coding question were asked
Round 2 - Technical
(2 Questions)
- Q1. Sum on node in binary tree
- Ans.
Recursively sum the values of nodes in a binary tree
Use a recursive function to traverse the tree and add the values of each node
Base case: if the current node is null, return 0
Recursive step: return the sum of current node value, left subtree sum, and right subtree sum
- Q2. Lp question asked
Answered by
AI
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Round 3 - Technical
(2 Questions)
- Q1. Question on string manipulation
- Q2. Lp question asked
Add your answer
Add your answer
Round 4 - Technical
(2 Questions)
- Q1. Managerial question on projects were asked
- Q2. Past experience and leadership question
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Skills evaluated in this interview
Interview experience
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Coding Test
Hard and platformwas leetcode and geeksforgeeks
Round 2 - Technical
(2 Questions)
- Q1. Medium level code was asked
- Q2. Hard level code as asked
Add your answer
Add your answer
Interview Preparation Tips
Interview preparation tips for other job seekers - Prepare well through leetcode
Interview experience
Good
Difficulty level
Moderate
Process Duration
2-4 weeks
Result
Selected
Round 1 - Coding Test
Good, leetcode medium level questions
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Amazon Interview FAQs
How many rounds are there in Amazon Software Engineer interview?
Amazon interview process usually has 2-3 rounds. The most common rounds in the Amazon interview process are Coding Test, Technical and Resume Shortlist.
How to prepare for Amazon Software Engineer interview?
Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at Amazon. The most common topics and skills that interviewers at Amazon expect are Architectural Design, Clinical SAS Programming, Medical Coding, System Architecture and Computer Science.
What are the top questions asked in Amazon Software Engineer interview?
Some of the top questions asked at the Amazon Software Engineer interview -
How long is the Amazon Software Engineer interview process?
The duration of Amazon Software Engineer interview process can vary, but typically it takes about 2-4 weeks to complete.
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Amazon Software Engineer Interview Process
based on 57 interviews
4 Interview rounds
- Resume Shortlist Round
- Coding Test Round
- Technical Round
- HR Round
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Top Skills for Amazon Software Engineer
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based on 151 reviews
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