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Google Senior Software Engineer Interview Questions and Answers
19 Interview questions
Experienced Senior Software Engineer with a strong background in full-stack development and team leadership.
Proficient in multiple programming languages including Java, Python, and JavaScript, demonstrated through developing scalable web applications.
Led a team of 5 engineers in a project that improved system performance by 30%, showcasing my leadership and project management skills.
Implemented CI/CD pipelines usi...
Design an IP blocking system to prevent unauthorized access to a network.
1. Maintain a list of blacklisted IP addresses.
2. Implement a firewall to block incoming traffic from blacklisted IPs.
3. Regularly update the blacklist based on security threats.
4. Consider implementing rate limiting to prevent brute force attacks.
5. Monitor and log blocked IP addresses for analysis.
Efficiently retrieve the minimum value from a stream of numbers using a query-based approach.
Use a priority queue (min-heap) to keep track of the minimum values as they come in.
For each new number, compare it with the current minimum and update if necessary.
Example: Stream = [5, 3, 8, 1]; Min = 1 after processing all.
Consider edge cases like empty streams or negative numbers.
Calculate the minimum number of train platforms required based on given arrival and departure times.
Sort the arrival and departure times.
Use two pointers to traverse the sorted lists.
Count the number of trains at the station at any time.
Update the maximum count of platforms needed.
Example: For arrivals [10:00, 10:15, 10:30] and departures [10:10, 10:20, 10:40], 2 platforms are needed.
Clone a tree by creating a mirror image of it
Traverse the original tree in a post-order manner
Create a new node for each visited node and assign its value
Recursively set the left child of the new node as the mirrored right child of the original node
Recursively set the right child of the new node as the mirrored left child of the original node
Dynamic programming problem involving a 2D array
Break down the problem into subproblems and store the results in a 2D array
Consider using top-down or bottom-up approach depending on the problem
Examples: Longest Common Subsequence, Minimum Path Sum
Design a scalable ID generator service for unique identification of entities.
Use a combination of timestamp, unique machine identifier, and sequence number to generate IDs.
Implement a distributed system to ensure uniqueness of generated IDs.
Consider using a centralized service for ID generation to avoid conflicts.
Use a high-performance database for storing generated IDs.
Implement error handling and retry mechanism...
Design an object storage system similar to Amazon S3, focusing on scalability, durability, and accessibility.
Use a distributed architecture to ensure high availability and fault tolerance.
Implement a RESTful API for easy integration and access, e.g., using HTTP methods like GET, PUT, DELETE.
Utilize object versioning to manage changes and maintain data integrity.
Incorporate security features like encryption at rest...
Try to troubleshoot the wifi connection issue by checking settings, restarting devices, and seeking help from IT support.
Check if the wifi is turned on and the correct network is selected
Restart the wifi router and the device
Contact IT support for assistance in retrieving the password
Iterate through array, calculate value at each index, keep track of maximum value
Iterate through the array and calculate the value at each index by multiplying jump length with value of location
Keep track of the maximum value encountered during the iteration
Return the maximum value found
Google Senior Software Engineer Interview Experiences
19 interviews found
Anonymous
Selected
I appeared for an interview in Mar 2025, where I was asked the following questions.
- Q1. Tell. me. about your self
- Q2. Whh. Should we choose you
- Ans.
I bring a unique blend of technical expertise, problem-solving skills, and a collaborative mindset to drive impactful software solutions.
Proven track record of delivering high-quality software on time, such as leading a team to develop a scalable e-commerce platform.
Strong proficiency in multiple programming languages, including Python and Java, demonstrated by building a microservices architecture.
Experience in mentor...
- Q3. Application. high. light. your. relevant. skills. and. experiences
- Ans.
Experienced Senior Software Engineer with a strong background in full-stack development and team leadership.
Proficient in multiple programming languages including Java, Python, and JavaScript, demonstrated through developing scalable web applications.
Led a team of 5 engineers in a project that improved system performance by 30%, showcasing my leadership and project management skills.
Implemented CI/CD pipelines using Je...
- Q4. What. are. Your. strengths. Can. you. work. under. Pressure
- Ans.
I excel in problem-solving, collaboration, and adaptability, thriving under pressure to deliver high-quality software solutions.
Strong problem-solving skills: For instance, I resolved a critical bug in a production system under tight deadlines, ensuring minimal downtime.
Effective collaboration: I led a team project where we had to deliver a feature in two weeks, and we successfully met the deadline through teamwork.
Ada...
Interview Preparation Tips
I applied via Approached by Company and was interviewed in Aug 2024. There was 1 interview round.
(2 Questions)
- Q1. Get minimum from stream. Query based.
- Ans.
Efficiently retrieve the minimum value from a stream of numbers using a query-based approach.
Use a priority queue (min-heap) to keep track of the minimum values as they come in.
For each new number, compare it with the current minimum and update if necessary.
Example: Stream = [5, 3, 8, 1]; Min = 1 after processing all.
Consider edge cases like empty streams or negative numbers.
- Q2. Minimum number of platforms for trains. Arrival n departure time is given.
- Ans.
Calculate the minimum number of train platforms required based on given arrival and departure times.
Sort the arrival and departure times.
Use two pointers to traverse the sorted lists.
Count the number of trains at the station at any time.
Update the maximum count of platforms needed.
Example: For arrivals [10:00, 10:15, 10:30] and departures [10:10, 10:20, 10:40], 2 platforms are needed.
I appeared for an interview in Nov 2024.
DSA question.
You are given a N*N matrix with 0s and 1s. Find the longest contiguous line of 1s in any direction (vertical, horizontal, diagonal or anti-diagonal)
Frontend question. Was shown a screenshot of google meet and asked to code html css for it.
Follow up questions were around improving accessibility and responsiveness.
Interview Preparation Tips
Try to tackle atleast one follow up. You won't get a hire call without that.
Selected
I applied via Approached by Company and was interviewed in Jul 2024. There were 4 interview rounds.
Coding test on leetcode. easy/medium problem.
Coding test on google docs. Question : Find the number of Lakes given a graph representation
Design optimal query data structure that can query on key's and timestamp. Follow up : how can we implement more time series relavant feature, like searching in ranges of timestamps
(2 Questions)
- Q1. Work experience in previous companies
- Ans.
I have 5 years of work experience in previous companies, primarily in developing web applications using Java and JavaScript.
Developed web applications using Java and JavaScript
Worked on database management and optimization
Collaborated with cross-functional teams for project delivery
- Q2. Time when there was a conflict with leadership
- Ans.
I disagreed with leadership on project priorities, but we reached a compromise through open communication.
Clearly communicate concerns and reasons for disagreement
Listen to leadership's perspective and try to understand their reasoning
Work together to find a compromise that aligns with both parties' goals
Interview Preparation Tips
- Data Structures
- Algorithms
- Machine coding
Be prapered for the behaviourial / googliness round.
I applied via Approached by Company and was interviewed in May 2024. There were 3 interview rounds.
Data structures, Algorithms
Data Structures, Algorithms
(1 Question)
- Q1. Design a IP blocking system
- Ans.
Design an IP blocking system to prevent unauthorized access to a network.
1. Maintain a list of blacklisted IP addresses.
2. Implement a firewall to block incoming traffic from blacklisted IPs.
3. Regularly update the blacklist based on security threats.
4. Consider implementing rate limiting to prevent brute force attacks.
5. Monitor and log blocked IP addresses for analysis.
Skills evaluated in this interview
I applied via Approached by Company and was interviewed in May 2024. There was 1 interview round.
(1 Question)
- Q1. Design object store like amazon s3
- Ans.
Design an object storage system similar to Amazon S3, focusing on scalability, durability, and accessibility.
Use a distributed architecture to ensure high availability and fault tolerance.
Implement a RESTful API for easy integration and access, e.g., using HTTP methods like GET, PUT, DELETE.
Utilize object versioning to manage changes and maintain data integrity.
Incorporate security features like encryption at rest and ...
Interview Preparation Tips
Rajesh Kumbhar
(2 Questions)
- Q1. Clone the tree as mirror image
- Ans.
Clone a tree by creating a mirror image of it
Traverse the original tree in a post-order manner
Create a new node for each visited node and assign its value
Recursively set the left child of the new node as the mirrored right child of the original node
Recursively set the right child of the new node as the mirrored left child of the original node
- Q2. DP Problem with 2d
- Ans.
Dynamic programming problem involving a 2D array
Break down the problem into subproblems and store the results in a 2D array
Consider using top-down or bottom-up approach depending on the problem
Examples: Longest Common Subsequence, Minimum Path Sum
Skills evaluated in this interview
Live coding test similar to leet code
(2 Questions)
- Q1. My previous experiece
- Q2. My currrent experience
I applied via Recruitment Consulltant and was interviewed before Jan 2024. There were 2 interview rounds.
Coding on the sudoko probelm
(1 Question)
- Q1. Technical interview was on the connected graphs
Interview Preparation Tips
Coding test with 2 questions
(1 Question)
- Q1. System Design with LLD implementation
- Ans.
System design involves creating a high-level design of a software system, followed by implementing the detailed low-level design.
Start by understanding the requirements and constraints of the system
Create a high-level design that outlines the components and interactions of the system
Implement the detailed low-level design, considering factors like scalability, performance, and maintainability
Use tools like UML diagrams...
(1 Question)
- Q1. System Design with HLD
- Ans.
System Design with HLD involves designing the high-level architecture of a software system.
Understand the requirements and constraints of the system
Identify the components and their interactions
Consider scalability, reliability, and performance
Use design patterns and best practices
Create diagrams like UML or flowcharts to visualize the design
Skills evaluated in this interview
Google Interview FAQs
Some of the top questions asked at the Google Senior Software Engineer interview -
The duration of Google Senior Software Engineer interview process can vary, but typically it takes about less than 2 weeks to complete.
Tell us how to improve this page.
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Overall Interview Experience Rating
based on 23 interview experiences
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Google Senior Software Engineer Reviews and Ratings
based on 18 reviews
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