4500+ Senior Software Engineer Interview Questions and Answers

Yes, I have worked on Kafka. My code had 10 partitions.

• Yes, I have experience working with Kafka and have implemented code with multiple partitions.

• In one of my projects, I used Kafka with 10 partitions to distribute the workload efficiently.

• Having multiple partitions in Kafka helped in achieving high throughput and scalability for real-time data processing.

An unique id for a massive parallel system can be generated using a combination of timestamp, machine id and a random number.

• Use a timestamp to ensure uniqueness

• Include a machine id to avoid collisions in a distributed system

• Add a random number to further increase uniqueness

• Consider using a UUID (Universally Unique Identifier) for simplicity

• Ensure the id generation algorithm is thread-safe

package.json is a file that contains metadata about a project and its dependencies.

• package.json is used in Node.js projects to manage dependencies

• Dependencies are packages required for the project to run

• Dev dependencies are packages required for development and testing

• Dependencies and dev dependencies are listed separately in package.json

• Example: "dependencies": {"express": "^4.17.1"}, "devDependencies": {"nodemon": "^2.0.7"}

Conditional split transaction in SSIS is used to route data based on specified conditions.

• Conditional split is a control flow component in SSIS.

• It evaluates a specified condition for each row of data and routes the rows to different outputs based on the result.

• Example: Route all orders with quantity greater than 100 to one output and all others to a different output.

Questions on Ajax, JS code for AJAX, hoisting, and related keywords for Senior Software Engineer role.

• Ajax is a technique for creating fast and dynamic web pages without reloading the entire page.

• JS code for AJAX involves creating an XMLHttpRequest object, defining a callback function, and sending a request to the server.

• Hoisting is a JS mechanism where variables and function declarations are moved to the top of their scope.

• Related keywords include let, const, var, function, ...read more

Yes, a new column can be added in between 2 existing columns in a table by altering the table structure.

• Yes, a new column can be added in between 2 existing columns by using the ALTER TABLE statement in SQL.

• The new column can be specified to be added after a specific existing column.

• For example, ALTER TABLE table_name ADD new_column_name datatype AFTER existing_column_name;

Manual testing is the process of manually testing software for defects, functionality, and usability.

• Manual testing involves testers executing test cases without the use of automation tools.

• It is a time-consuming process but allows for thorough testing of software.

• Testers document their findings and report any issues to the development team for resolution.

Interview questions for Senior Software Engineer position

• Array list vs linked list - array list is faster for random access, linked list is better for frequent insertions/deletions

• Getters and setters are used for encapsulation and to control access to class variables

• Loose coupling allows for easier maintenance and testing, tight coupling can lead to code that is difficult to modify

• Spring Boot is a framework for building standalone applications, MVC is a design pattern for sep...read more

Utilize Azure Functions to create a serverless architecture for processing patient data in real-time.

• Use Azure Functions to trigger data processing when new patient records are added to Azure Blob Storage.

• Implement durable functions to manage long-running workflows, such as patient data analysis.

• Integrate Azure Cosmos DB for storing processed patient data and enable quick retrieval for reporting.

• Leverage Azure Logic Apps to automate notifications to healthcare providers when ...read more

Design an employee-Manager class and write a method to display employee organizational hierarchy.

• Create an Employee class with attributes like name, id, managerId, etc.

• Create a Manager class that inherits from Employee class and has a list of employees under them.

• Write a method to display the hierarchy using recursion.

• Use a data structure like a dictionary to store the employees and their managers.

• Consider edge cases like circular references and missing managers.

Multitasking in Java can be achieved using threads.

• Create multiple threads to execute tasks concurrently.

• Use the Thread class or the Runnable interface to define the tasks.

• Use synchronization mechanisms like locks or semaphores to coordinate access to shared resources.

• Java provides built-in support for multitasking with the Thread class and the Executor framework.

• Example: creating two threads to perform different tasks simultaneously.

Answers to SQL-related questions for Senior Software Engineer position

• To see SQL sessions, use the sp_who2 stored procedure or the Activity Monitor in SQL Server Management Studio

• To store temporary data inside a stored procedure, use table variables or temporary tables

• Use temp tables when you need to store large amounts of data or when you need to perform complex joins or aggregations

• Index seek is a type of index access method that uses a seek operation to find the data, whil...read more

To enable Actuator in a Spring Boot application, you need to include the Actuator dependency in your pom.xml file and configure it in the application.properties file.

• Include Actuator dependency in pom.xml file

• Configure Actuator endpoints in application.properties file

• Access Actuator endpoints to monitor and manage the application

Screenshots are captured images of the current screen. They are used for documentation, troubleshooting, and sharing information.

• Screenshots can be taken using built-in tools like Snipping Tool or keyboard shortcuts like Print Screen.

• Screenshots can be used to document software bugs or errors for troubleshooting purposes.

• Screenshots can be shared with others to provide visual information or instructions.

• Screenshots can be used for training or educational purposes.

• Screenshots ...read more

Different types of locators in Selenium include ID, Name, Class Name, Tag Name, Link Text, Partial Link Text, XPath, and CSS Selector.

• ID - Locate elements by their ID attribute

• Name - Locate elements by their Name attribute

• Class Name - Locate elements by their Class attribute

• Tag Name - Locate elements by their HTML tag name

• Link Text - Locate anchor elements by their exact text

• Partial Link Text - Locate anchor elements by partial text

• XPath - Locate elements using XML Path expre...read more

The most commonly used instructions in a Dockerfile include FROM, RUN, COPY, and CMD.

• FROM: Specifies the base image for the container

• RUN: Executes commands in the container

• COPY: Copies files and directories from the host to the container

• CMD: Specifies the default command to run when the container starts

API stands for Application Programming Interface. REST and SOAP are two types of APIs.

• REST is an architectural style that uses HTTP protocol for communication and supports multiple data formats like JSON, XML, etc.

• SOAP is a protocol that uses XML for communication and supports only XML data format.

• REST is lightweight and easy to use, while SOAP is more complex and requires more bandwidth.

• REST is stateless, while SOAP maintains state information.

• REST is widely used for web ser...read more

Abstract class is a class that cannot be instantiated and may contain abstract methods, while interfaces only define method signatures.

• Abstract classes can have both abstract and non-abstract methods, providing a partial implementation for subclasses.

• Interfaces can only have method signatures, requiring implementing classes to define the actual implementation.

• Abstract classes can have constructors, member variables, and method implementations, while interfaces cannot.

• Abstract...read more

A javascript function to find the maximum and minimum occurrence of a letter in a string.

• Create an object to store the count of each letter in the string

• Loop through the string and update the count in the object

• Find the maximum and minimum count in the object and return the corresponding letters

Yes, I have implemented a service on cloud using AWS Lambda and it interacts with an application in a physical VM through API calls.

• Implemented a serverless service using AWS Lambda

• Exposed APIs for the service

• Configured the physical VM application to make API calls to the cloud service

• Ensured proper authentication and authorization mechanisms for secure communication

VPC stands for Virtual Private Cloud, which is a virtual network in the cloud.

• VPC allows users to create their own isolated network within the cloud

• It provides control over network topology, IP address range, and subnets

• VPC can be used to securely connect resources in the cloud and on-premises

• Examples of cloud providers that offer VPC are Amazon Web Services and Google Cloud Platform

Establishing connection between view and viewmodel involves data binding and communication mechanisms.

• Use data binding frameworks like Angular's ngModel or React's setState to bind data between view and viewmodel

• Implement event handling to communicate user interactions from view to viewmodel

• Utilize two-way data binding to automatically update the view when the viewmodel changes

• Use observables or reactive programming to handle asynchronous data updates

I would analyze the current approach, identify the root cause of the issue, brainstorm alternative solutions, and collaborate with the team to implement and test them.

• Analyze the current approach to identify weaknesses

• Brainstorm alternative solutions with the team

• Implement and test the new solutions

• Regularly communicate and collaborate with team members

Use AWS Amplify to easily deploy static web applications from GitHub.

• Create an AWS Amplify app and connect it to your GitHub repository.

• Configure the build settings for your app in the Amplify console.

• Push changes to your GitHub repository and Amplify will automatically build and deploy your app.

• Customize your deployment settings and add features like authentication and analytics.

• Amplify supports a variety of static site generators and frameworks, including React, Vue, and An...read more

ArrayList is implemented as a resizable array, while LinkedList is implemented as a doubly linked list.

• ArrayList provides fast random access and slower insertion/deletion, while LinkedList provides fast insertion/deletion and slower random access.

• ArrayList uses less memory overhead compared to LinkedList.

• Example: ArrayList is more suitable for scenarios where random access is frequent, while LinkedList is more suitable for scenarios where frequent insertion/deletion is requir...read more

Makemytrip blocks seat for 15 mins by using a hold on the seat inventory.

• Makemytrip uses a hold on the seat inventory to block the seat for 15 mins.

• If the payment doesn't go through, the hold is released and the seat becomes available again.

• This ensures that the seat is not booked by someone else during the payment process.

• The hold time can vary depending on the airline's policy.

• Makemytrip also sends reminders to complete the payment before the hold expires.

The finally block will always execute, even if an exception is thrown from the try block.

• The finally block is used to execute code that should always run, regardless of whether an exception is thrown or not.

• If an exception is thrown from the try block, the code in the finally block will still execute.

• This is useful for cleaning up resources, such as closing files or database connections.

• Example: try { // code that may throw an exception } finally { // code that should always ...read more