Infosys Senior Systems Engineer Interview Questions, Process, and Tips

Q1. What is Routing in angular
Ans. 
Routing in Angular is the process of navigating between different components or views in a single-page application.
• Routing allows users to move between different parts of an application without reloading the entire page

• Routes are defined in the app-routing.module.ts file using the RouterModule.forRoot() method

• Each route maps a URL path to a component, which is then displayed when the path is accessed

• Route parameters ca...read more
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Q2. Angular life cycle
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Q3. Find no of occurrence in string
Ans. 
Count the number of occurrences of a specific substring in a given string.
• Use the built-in function or loop through the string to count occurrences.

• Consider case sensitivity when counting occurrences.

• Example: 'hello hello world'.count('hello') = 2
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If you join as a fresher you gave to give aptitude test

Q1. What is method overloading and method overring
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Those where basics not very hard

Q1. Oops concepts and core java including loops
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Q2. Conditional statements and overloading and overriding
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Basic aptitude questions and analytical

Q1. Write program to find largest number from array
Ans. 
Program to find largest number from array of strings
• Convert array of strings to array of integers

• Use a loop to iterate through the array and compare each element to find the largest number

• Return the largest number found
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Aptitude, Algorithm & puzzle

Q1. What are Oops concepts
Ans. 
Oops concepts refer to Object-Oriented Programming principles such as Inheritance, Encapsulation, Polymorphism, and Abstraction.
• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementation det
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Q2. Explain SDLC life cycle
Ans. 
SDLC life cycle is a process used by software development teams to design, develop, and test high-quality software.
• 1. Planning: Define project scope, requirements, and timeline.

• 2. Analysis: Gather and analyze user requirements.

• 3. Design: Create a detailed design plan for the software.

• 4. Implementation: Develop the software based on the design.

• 5. Testing: Test the software for bugs and issues.

• 6. Deployment: Release the ...read more
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Q1. Explain your project architecture.
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Q2. Data science related concepts.
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Q1. Basic SQL and Python coding questions
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Q2. Machine learning and DS questions.
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Apptitude test contain 4 parts - logical reasoning,verbal ability,puzzle ,code

Q1. Asked basic java questions, project and sql questions
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Q2. What is OOPS concept in java?
Ans. 
OOPS concept in Java stands for Object-Oriented Programming System, which is a programming paradigm based on the concept of objects.
• OOPS focuses on creating objects that contain both data and methods to manipulate that data.

• Key principles of OOPS include Inheritance, Encapsulation, Polymorphism, and Abstraction.

• Inheritance allows a class to inherit properties and behavior from another class.

• Encapsulation involves bundl...read more
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Q3. Expalin joins in sql?
Ans. 
Joins in SQL are used to combine rows from two or more tables based on a related column between them.
• Joins are used to retrieve data from multiple tables based on a related column between them

• Common types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN

• INNER JOIN returns rows when there is at least one match in both tables

• LEFT JOIN returns all rows from the left table and the matched rows from the righ...read more
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Q4. Explain your project?
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Q5. Difference between delete and drop in sql?
Ans. 
Delete is used to remove rows from a table, while drop is used to remove an entire table from the database.
• DELETE is a DML command, while DROP is a DDL command.

• DELETE statement is used with a WHERE clause to specify which rows to delete, while DROP statement is used to remove the entire table structure.

• DELETE does not remove the table itself, only the rows within it, while DROP removes the table along with all its data
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