LTIMindtree Interview Questions, Process, and Tips

Coding test provided on a platform that included two coding questions and about 20 MCQs. Time provided was definitely short, and my guess would be that they wanted interviewers to pick their battles, so to speak. 45% was enough to get to the next round and scoring above 65% meant an HR round directly.

Q1. How can multithreading be implemented in a Java microservices application?
Ans. 
Multithreading in Java microservices can be implemented using Java's built-in threading capabilities.
• Use Java's Executor framework to manage threads in a microservices application.

• Implement asynchronous processing using CompletableFuture to improve performance.

• Consider using thread pools to manage resources efficiently.

• Use synchronized blocks or locks to handle shared resources safely.

• Leverage Java's concurrent data st...read more
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Q2. Sort a map of employees and their corresponding salaries using java streams.
Ans. 
Sort a map of employees and their corresponding salaries using Java streams.
• Use entrySet() to get a stream of key-value pairs from the map.

• Use sorted() with a comparator to sort the stream based on salaries.

• Collect the sorted stream back into a LinkedHashMap to maintain the order.
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Q3. What is the conditional property of Spring beans and how is it configured?
Ans. 
Conditional property in Spring beans allows for conditional bean creation based on specified conditions.
• Conditional property is used to conditionally create beans based on certain conditions.

• It is configured using @Conditional annotation on the bean definition class.

• Examples include @ConditionalOnProperty, @ConditionalOnClass, @ConditionalOnMissingBean, etc.
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Q4. What is the request filter for API requests and how is it configured to utilise different forms of authentication?
Ans. 
Request filter for API requests is a mechanism to intercept and process incoming requests before they reach the intended endpoint.
• Request filters can be implemented using frameworks like Spring Security in Java.

• They can be configured to support different forms of authentication such as basic authentication, OAuth, JWT, etc.

• Authentication mechanisms can be specified in the filter configuration to validate incoming reque
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Q5. How do you enable pagination in responses from a REST API ?
Ans. 
Pagination in REST API responses can be enabled by using query parameters like 'page' and 'limit'.
• Use query parameters like 'page' and 'limit' to specify the page number and number of items per page.

• Implement logic in the backend to fetch and return the appropriate subset of data based on the page and limit values.

• Include metadata in the response to indicate total number of items and current page number.

• Example: /api/u...read more
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Q6. How would you implement a JUnit test for a REST API that you have developed?
Ans. 
Implementing JUnit test for a REST API
• Create a test class for the REST API endpoints

• Use @RunWith(SpringRunner.class) and @SpringBootTest annotations

• MockMvc to perform HTTP requests and validate responses

• Use @Autowired to inject dependencies for testing

• Assert statements to verify expected results
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Q7. How does the Circuit Breaker design pattern work?
Ans. 
Circuit Breaker design pattern is used to prevent a system from repeatedly trying to execute an operation that is likely to fail.
• Circuit Breaker monitors the number of failures when calling a remote service

• If the failures exceed a certain threshold, the Circuit Breaker trips and stops further calls to the service

• After a specified time, the Circuit Breaker allows a limited number of calls to test if the service is avail
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Q1. What is the difference between Regression Testing and Smoke Testing?
Ans. 
Regression Testing is testing the application to ensure new code changes have not affected existing functionality, while Smoke Testing is a preliminary test to check if the software build is stable enough for further testing.
• Regression Testing is performed after code changes to ensure that existing functionality is not impacted.

• Smoke Testing is a quick test to check if the software build is stable enough for further te...read more
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Q2. What is the bug life cycle?
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Bug life cycle is the process of identifying, reporting, fixing, retesting, and closing bugs in software development.
• Bug identification: Bugs are identified by testers during testing.

• Bug reporting: Testers report bugs to developers with detailed information.

• Bug fixing: Developers resolve the reported bugs.

• Bug retesting: Testers verify if the fixed bugs are resolved.

• Bug closing: Once the bug is confirmed fixed, it is cl
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Q3. Could you explain the automation framework you used in your last project?
Ans. 
I used a keyword-driven automation framework in my last project.
• The framework was based on keywords that represented actions or functionalities.

• Test scripts were written using these keywords to perform automated tests.

• The framework allowed for easy maintenance and scalability of test scripts.

• It provided flexibility to easily add new test cases or modify existing ones.

• Example: Keywords like 'click', 'inputText', 'verify...read more
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Q4. What is the difference between the `gettext()` and `getAttribute()` methods in Selenium?
Ans. 
gettext() is used to retrieve text from a web element, while getAttribute() is used to retrieve the value of an attribute of a web element.
• gettext() retrieves the visible text displayed on a web element, such as a button or a link.

• getAttribute() retrieves the value of a specified attribute of a web element, such as 'href' for a link or 'value' for an input field.

• Example: Using gettext() to retrieve the text displayed o...read more
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Q5. Write a java program to replace a specific character at a specified index?
Ans. 
Java program to replace a specific character at a specified index in an array of strings.
• Create a method that takes in the array of strings, index, and character to replace as parameters.

• Use StringBuilder to modify the string at the specified index.

• Return the updated array of strings.
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Q1. What is the difference between absolute and relative XPath?
Ans. 
Absolute XPath starts from the root node, while relative XPath starts from any node in the XML structure.
• Absolute XPath starts with a single forward slash (/) and always starts from the root node of the XML document.

• Relative XPath does not start with a forward slash and can start from any node in the XML document.

• Absolute XPath is more brittle as any changes in the structure of the XML document can break the XPath, whi...read more
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Q2. What is the average number of test cases you automate on a daily basis?
Ans. 
The average number of test cases automated daily varies depending on complexity and scope of testing.
• The number of test cases automated daily can range from a few to dozens, depending on the project requirements.

• Factors such as the size of the application, level of automation already in place, and availability of resources can impact the daily automation rate.

• For example, in a small project with limited scope, an engin...read more
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Q3. What is the difference between the Verify and Assert commands?
Ans. 
Verify is used to validate the condition of a test case, while Assert is used to validate the result of a test case.
• Verify is used to check if a condition is true without stopping the execution of the test case.

• Assert is used to check if a condition is true and if not, it stops the execution of the test case.

• Verify is typically used for non-critical verifications, while Assert is used for critical verifications.

• Example...read more
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Q4. What is the difference between implicit waits and explicit waits in automated testing?
Ans. 
Implicit waits are applied globally and wait for a certain amount of time before throwing an exception, while explicit waits are applied to specific elements and wait for a certain condition to be met.
• Implicit waits are set once and apply to all elements in the test script

• Explicit waits are applied to specific elements and wait for a certain condition to be met

• Implicit waits wait for a certain amount of time before thr...read more
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Q5. How can you handle frames in Selenium?
Ans. 
Frames in Selenium can be handled using switchTo() method to navigate between frames.
• Use driver.switchTo().frame() method to switch to a frame by index, name or WebElement

• Use driver.switchTo().parentFrame() method to switch back to the parent frame

• Use driver.switchTo().defaultContent() method to switch to the main content of the page
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Q6. Write a java program to copy an array by iteration the array
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Java program to copy an array by iterating through it
• Create a new array with the same length as the original array

• Use a for loop to iterate through the original array and copy each element to the new array

• Return the new copied array
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Q1. What are your salary expectations?
Ans. 
I am looking for a competitive salary that reflects my experience and skills in the quality engineering field.
• Research industry standards for quality engineering salaries

• Consider your level of experience and expertise

• Factor in location and cost of living

• Be prepared to negotiate based on benefits and opportunities for growth
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Q1. All Manual testings
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Q2. Code for a Start pattern
Ans. 
Code for a Start pattern
• Use nested loops to print the pattern

• Increment the number of stars in each row

• Use a combination of spaces and stars to create the pattern
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Q3. Code for reverse string
Ans. 
Code to reverse a string in an array of strings
• Iterate through each string in the array

• For each string, use a loop to reverse the characters

• Store the reversed string back in the array
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Q4. Code to start Web browser,go to a specific url and find a element and display
Ans. 
Use Selenium WebDriver to start a web browser, navigate to a specific URL, find an element, and display it.
• Use Selenium WebDriver to automate browser actions

• Instantiate a WebDriver object and open a browser

• Use the get() method to navigate to the specified URL

• Locate the desired element using findElement() method

• Retrieve and display the element's text or attributes
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Q1. About project,roles and responsibilities
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Q2. Steps to start Mobile automation
Ans. 
To start mobile automation, first identify the tools and frameworks, set up the testing environment, create test cases, and execute tests.
• Identify the tools and frameworks suitable for mobile automation (e.g. Appium, Selenium)

• Set up the testing environment with necessary software and devices

• Create test cases based on requirements and user scenarios

• Execute tests on different mobile devices and platforms to ensure compat
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Q3. Client meeting to handle them
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Q4. Why you want to join us
Ans. 
I am excited about the opportunity to contribute my expertise in quality engineering to a dynamic and innovative team.
• I am impressed by the company's reputation for excellence in quality standards.

• I am excited about the chance to work on cutting-edge projects and technologies.

• I believe my skills and experience align well with the company's goals and values.
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Q1. Salary negotiable
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Q1. Complex project scenarios
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Q2. Team management
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Q1. Program management questions
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Q2. Delivery related questions
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Q1. About myself and my Day-to-day activities
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Q2. About my role in the project, Packaging workflow and Life cycle.
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Q3. How you handle user profile data?
Ans. 
User profile data is securely stored in a centralized database with access control and encryption.
• Store user profile data in a centralized database

• Implement access control to restrict unauthorized access

• Encrypt sensitive user information for added security
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Q1. Explain about which package you feel complex and why?
Ans. 
I find the Kubernetes package to be complex due to its extensive features and configurations.
• Kubernetes has a steep learning curve with various concepts like pods, deployments, services, etc.

• Managing Kubernetes clusters requires understanding of networking, storage, security, and scalability.

• Configuring Kubernetes involves YAML files, API resources, and command-line tools like kubectl.

• Troubleshooting issues in Kubernet...read more
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Q2. Explain the difference between application model and package model in sccm?
Ans. 
Application model in SCCM is used to deploy applications based on user-centric requirements, while package model is used for traditional software deployment.
• Application model allows for user-centric deployments and dependencies, while package model is more rigid and requires manual intervention for dependencies.

• Application model supports user device affinity, allowing for targeted deployments to specific users or devic...read more
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Q1. About my role in the package. Previous origination details?
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Q2. Salary discussion and about my notice period
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Q1. Explain what is windows server.
Ans. 
Windows Server is a group of operating systems designed by Microsoft for server use.
• Windows Server is a group of operating systems developed by Microsoft.

• It is specifically designed for use in server environments.

• Windows Server provides features such as networking, storage, and virtualization capabilities.

• Examples of Windows Server versions include Windows Server 2016 and Windows Server 2019.
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Q2. Explain what does intellimirror do
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Intellimirror is a feature in Windows Server that allows for centralized management of user desktop settings and files.
• Intellimirror provides users with access to their desktop settings and files from any computer on the network.

• It allows for automated backup and restoration of user data and settings.

• Intellimirror can be used to deploy software applications to multiple computers in a network.

• It helps in reducing IT sup...read more
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Q3. What does it mean by "tattooing" the registry
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Tattooing the registry refers to making permanent changes to the Windows registry that cannot be easily undone.
• Tattooing the registry involves modifying critical system settings in the Windows registry.

• These changes are typically irreversible and can have a significant impact on system performance and stability.

• It is important to exercise caution when tattooing the registry as incorrect changes can lead to system error...read more
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Q4. Mention how many types of queries DNS does
Ans. 
DNS can perform various types of queries including recursive, iterative, inverse, and dynamic updates.
• DNS can perform recursive queries where it queries other servers on behalf of the client until it finds the answer.

• Iterative queries involve the DNS server providing the best answer it can based on its own knowledge.

• Inverse queries allow a DNS client to request the domain name associated with a specific IP address.

• Dyna...read more
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Q5. Explain what is the primary function of the domain controller
Ans. 
The primary function of the domain controller is to authenticate and authorize all users and computers in a Windows domain network.
• Authenticating and authorizing users and computers in a Windows domain network

• Managing security policies and access control

• Maintaining Active Directory database

• Enforcing security policies across the network
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Q1. How do you optimize SQL queries?
Ans. 
Optimizing SQL queries involves using indexes, avoiding unnecessary joins, and optimizing the query structure.
• Use indexes on columns frequently used in WHERE clauses

• Avoid using SELECT * and only retrieve necessary columns

• Optimize joins by using INNER JOIN instead of OUTER JOIN when possible

• Use EXPLAIN to analyze query performance and make necessary adjustments
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Q2. How do you do performance optimization in Spark. Tell how you did it in you project.
Ans. 
Performance optimization in Spark involves tuning configurations, optimizing code, and utilizing caching.
• Tune Spark configurations such as executor memory, number of executors, and shuffle partitions.

• Optimize code by reducing unnecessary shuffles, using efficient transformations, and avoiding unnecessary data movements.

• Utilize caching to store intermediate results in memory and avoid recomputation.

• Example: In my projec...read more
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Q3. What is SparkContext and SparkSession?
Ans. 
SparkContext is the main entry point for Spark functionality, while SparkSession is the entry point for Spark SQL.
• SparkContext is the entry point for low-level API functionality in Spark.

• SparkSession is the entry point for Spark SQL functionality.

• SparkContext is used to create RDDs (Resilient Distributed Datasets) in Spark.

• SparkSession provides a unified entry point for reading data from various sources and performing
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Q4. When a spark job is submitted, what happens at backend. Explain the flow.
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When a spark job is submitted, various steps are executed at the backend to process the job.
• The job is submitted to the Spark driver program.

• The driver program communicates with the cluster manager to request resources.

• The cluster manager allocates resources (CPU, memory) to the job.

• The driver program creates DAG (Directed Acyclic Graph) of the job stages and tasks.

• Tasks are then scheduled and executed on worker nodes ...read more
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Q5. Calculate second highest salary using SQL as well as pyspark.
Ans. 
Calculate second highest salary using SQL and pyspark
• Use SQL query with ORDER BY and LIMIT to get the second highest salary

• In pyspark, use orderBy() and take() functions to achieve the same result
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Q6. 2 types of modes for Spark architecture ?
Ans. 
The two types of modes for Spark architecture are standalone mode and cluster mode.
• Standalone mode: Spark runs on a single machine with a single JVM and is suitable for development and testing.

• Cluster mode: Spark runs on a cluster of machines managed by a cluster manager like YARN or Mesos for production workloads.
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Q7. If you want very less latency - which is better standalone or client mode?
Ans. 
Client mode is better for very less latency due to direct communication with the cluster.
• Client mode allows direct communication with the cluster, reducing latency.

• Standalone mode requires an additional layer of communication, increasing latency.

• Client mode is preferred for real-time applications where low latency is crucial.
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Q1. Scenario based. Write SQL and pyspark code for a dataset.
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Q2. If you have to find latest record based on latest timestamp in a table for a particular customer(table is having history) , how will you do it. Self join and nested query will be expensive. Optimized query...read more
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