LTIMindtree Senior Software Engineer Interview Questions, Process, and Tips

Q1. Performance improvement for application
Ans. 
Performance improvement for application involves optimizing code, database queries, and server configurations.
• Identify and optimize slow database queries

• Implement caching mechanisms to reduce redundant calculations

• Use efficient algorithms and data structures

• Optimize server configurations for better resource utilization
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Q2. Let const var diference
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const is used to declare a constant variable whose value cannot be changed, while var is used to declare a variable that can be reassigned.
• const is block-scoped, while var is function-scoped

• const must be initialized during declaration, var can be declared without initialization

• const is preferred for declaring variables that should not be reassigned, var is used for variables that may need to be reassigned
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Q3. Closure examples and lexical scope
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Q4. Hoc renderprops difference
Ans. 
Render props is a pattern in React where a component's prop is a function that returns a React element.
• Render props allow components to share code and logic without inheritance.

• Render props can be used to pass data or functions from a parent component to a child component.

• Render props can make components more reusable and flexible.

• Example: } />
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Q5. Reduxtoolkit explain
Ans. 
Redux Toolkit is a set of tools and best practices for managing state in React applications.
• Redux Toolkit simplifies the process of writing Redux code by providing a set of tools like createSlice, createAsyncThunk, and configureStore.

• It helps reduce boilerplate code and makes it easier to set up a Redux store.

• Redux Toolkit also includes utilities like createSelector for creating memoized selectors.

• Example: const counte...read more
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Q1. Angular forms, Hoisting, Output based questions
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Q2. Output based questions
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Q3. Angular routing
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Q4. Component architecture
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Q5. Database concepts
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Q1. What is CTE in Sql
Ans. 
CTE stands for Common Table Expressions in SQL. It is a temporary result set that can be referenced within a SELECT, INSERT, UPDATE, or DELETE statement.
• CTEs are defined using the WITH keyword followed by a query.

• They can be recursive, allowing a query to reference itself.

• CTEs improve readability and maintainability of complex queries.

• Example: WITH cte AS (SELECT * FROM table_name) SELECT * FROM cte;
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Q2. What is cross Join
Ans. 
Cross Join is a type of join operation in SQL that returns the Cartesian product of two tables.
• Cross Join returns all possible combinations of rows from two tables.

• It does not require any matching condition like other join types.

• Cross Join can result in a large number of rows if the tables being joined have many rows.
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Q3. What are custom middleware? Have you implemented in previous project how
Ans. 
Custom middleware are functions that have access to the request and response objects in an Express application's request-response cycle.
• Custom middleware can be used to perform tasks such as logging, authentication, error handling, etc.

• Middleware functions can be added to the request handling chain using the 'use' method in Express.

• An example of custom middleware implementation is adding a function to log request detai
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Q4. Explain about Code Coverage
Ans. 
Code coverage is a metric used to measure the amount of code being tested by automated tests.
• Code coverage is expressed as a percentage of code lines executed by automated tests.

• It helps in identifying areas of code that are not being tested.

• Higher code coverage does not guarantee absence of bugs, but it does indicate a higher level of testing.

• Tools like JaCoCo, Cobertura, and Istanbul can be used to measure code cover...read more
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Q5. What are abstract classes and interfaces
Ans. 
Abstract classes and interfaces are types of classes in object-oriented programming that cannot be instantiated and are used for defining common behavior.
• Abstract classes can have both abstract methods (methods without implementation) and concrete methods, while interfaces can only have abstract methods.

• A class can implement multiple interfaces, but can only inherit from one abstract class.

• Abstract classes can have con...read more
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Q6. Explain where you used Azure function and why
Ans. 
I have used Azure Functions to automate data processing tasks and trigger actions based on events.
• Implemented Azure Functions to process incoming data from IoT devices and trigger alerts based on predefined rules

• Utilized Azure Functions to automatically resize images uploaded to a storage account

• Integrated Azure Functions with Azure Logic Apps to create automated workflows
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Q7. Explain the type of authentication used in your previous project
Ans. 
JWT token-based authentication was used in the previous project
• JWT tokens were generated upon successful login

• Tokens were sent in the Authorization header of HTTP requests

• Tokens had an expiration time to ensure security

• Tokens were verified using a secret key on the server side
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Q1. Concept of the technology
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Q1. Manager round and some technical
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Q2. HR round salary discussion
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Q1. HR round salary discussion
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Q1. Grbage Collection
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Q2. Intrenal implemetation of hashmap and hashset
Ans. 
Internal implementation of hashmap and hashset involves using arrays and linked lists for storing key-value pairs and unique elements respectively.
• HashMap internally uses an array of linked lists to store key-value pairs.

• HashSet internally uses a HashMap to store unique elements as keys with a dummy value.

• Hash functions are used to determine the index of the array where the key-value pair or element should be stored.

• Co...read more
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Coding related mcqs, not to difficult, moderate questions

Q1. Core Java related and some logical ones.
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Q2. Can prepare core java and some logical questions can be helpful to crack it.
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