Tech Mahindra Senior Software Engineer Interview Questions and Answers for Experienced

CAN FD stands for Controller Area Network Flexible Data Rate, it is required for high-speed communication in automotive and industrial applications.

• CAN FD allows for higher data rates compared to traditional CAN networks

• It is necessary for transmitting large amounts of data quickly and efficiently

• Used in applications where real-time communication and reliability are crucial, such as automotive ECUs

• Example: CAN FD is us...read more

LKA stands for Lane Keep Assist, while LDW stands for Lane Departure Warning.

• LKA helps keep the vehicle centered in its lane by providing steering input if necessary.

• LDW alerts the driver if the vehicle is unintentionally drifting out of its lane.

• LKA is more proactive in assisting the driver with lane keeping, while LDW is more of a warning system.

• Some vehicles may have both LKA and LDW features integrated for enhanced...read more

ASPICE (Automotive SPICE) model is a framework for software development in the automotive industry. ITR (Integrated Test Requirement) is a part of ASPICE focusing on testing requirements.

• ASPICE is a framework for software development in the automotive industry

• ITR is a part of ASPICE that focuses on testing requirements

• ASPICE helps in ensuring high-quality software development in automotive projects

Writing test cases for ADAS ECU involves verifying functionality and performance of the electronic control unit.

• Identify the input and output requirements of the ADAS ECU

• Create test cases to cover different scenarios such as normal operation, edge cases, and failure modes

• Include test cases for communication protocols, sensor inputs, and system responses

• Verify the integration of ADAS ECU with other components in the sys...read more

Calculate average of integer arrays using Java 8 streams

• Use IntStream to convert the array to a stream of integers

• Use average() method to calculate the average of the integers

• Collect the result using getAsDouble() method

Idempotency is the property of an operation where applying it multiple times has the same effect as applying it once.

• Idempotency ensures that repeating the same operation multiple times will not change the result.

• Examples include GET requests in RESTful APIs, where multiple identical requests will return the same response.

• Idempotency is important in distributed systems to prevent duplicate operations.

• PUT and DELETE req...read more

Hooks are functions that let you use state and lifecycle features in React functional components.

• Hooks allow functional components to manage state without converting them to class components. Example: useState.

• They enable side effects in functional components using useEffect. Example: fetching data on component mount.

• Custom hooks can be created to encapsulate reusable logic. Example: useFetch for API calls.

• Hooks follow...read more

State management in React involves using local state, context API, and external libraries for efficient data handling.

• Use local state with the useState hook for simple components: const [count, setCount] = useState(0);

• Utilize the Context API for global state management: create a context and use useContext to access it.

• Leverage external libraries like Redux or MobX for complex state management needs, allowing for centra...read more

In React, data can be passed from child components to parent components using callback functions.

• 1. Define a function in the parent component that will handle the data received from the child.

• 2. Pass this function as a prop to the child component.

• 3. In the child component, call the function with the data you want to send back to the parent.

• Example: In Parent: const handleData = (data) => { console.log(data); }; <...read more

React hooks are functions that let you use state and lifecycle features in functional components.

• useEffect is a hook that allows you to perform side effects in function components.

• It takes two arguments: a function to run and an array of dependencies.

• The effect runs after the render and can be used for data fetching, subscriptions, or manually changing the DOM.

• If the dependencies array is empty, the effect runs only on...read more

Error handling in Ansible involves using various modules and strategies to manage and respond to errors during playbook execution.

• Use the 'failed_when' directive in tasks to specify conditions that should result in a task failure.

• Utilize the 'ignore_errors' directive to continue executing tasks even if errors occur.

• Implement error handling with 'rescue' and 'always' blocks in playbooks to handle errors and cleanup task...read more

Pod is ephemeral due to its temporary nature and dynamic lifecycle.

• Pods are designed to be easily created, destroyed, and replaced.

• Pods do not have persistent storage by default.

• Pods are scheduled and managed by the Kubernetes control plane.

• Pods can be automatically rescheduled to different nodes in case of failures.

Access tiers in Azure Storage include hot, cool, and archive tiers.

• Hot access tier: Optimized for frequently accessed data with higher storage costs.

• Cool access tier: Optimized for infrequently accessed data with lower storage costs.

• Archive access tier: Optimized for rarely accessed data with the lowest storage costs.

• Data in the archive tier may have longer retrieval times compared to hot and cool tiers.

Developed a web-based project management tool for tracking tasks and deadlines

• Created user-friendly interface for adding, editing, and deleting tasks

• Implemented notifications for upcoming deadlines

• Integrated with calendar API for scheduling tasks

I will handle errors in prod environment by implementing proper error logging, monitoring, and alerting systems.

• Implement comprehensive error logging to track errors and their root causes

• Set up monitoring tools to detect errors in real-time and alert the team

• Establish a process for prioritizing and resolving errors based on impact and severity

• Regularly review and analyze error logs to identify patterns and prevent futu...read more

Steps for updating a build and performing rollback

• Create a backup of the current build before making any changes

• Update the build with the necessary changes and test thoroughly

• If issues are found, identify the cause and plan for rollback

• Rollback by restoring the backup of the previous build

• Communicate the rollback to the team and document the process