Infosys Senior Systems Engineer Interview Questions and Answers

A code snippet to demonstrate a simple array manipulation in Python.

• Use lists in Python to create an array-like structure.

• Example: my_array = [1, 2, 3, 4] to initialize an array.

• You can append items using my_array.append(5).

• Access elements using indexing: first_element = my_array[0].

• Use list comprehensions for transformations: squared = [x**2 for x in my_array].

Remove duplicates from a string while preserving the original order of characters.

• Use a set to track seen characters and a list to build the result. Example: 'banana' -> 'ban'.

• Iterate through the string, adding characters to the result if they haven't been seen. Example: 'apple' -> 'aple'.

• Consider edge cases like empty strings or strings with all duplicates. Example: '' -> ''.

• Return the result as a new st...read more

Thymeleaf is a modern server-side Java template engine for web and standalone environments, designed for processing and creating HTML, XML, and more.

• Thymeleaf integrates seamlessly with Spring Framework, making it a popular choice for Spring MVC applications.

• It allows for natural templating, meaning templates can be opened and edited in a browser without needing to be processed by the server.

• Thymeleaf supports var...read more

Swagger is an open-source framework for designing, building, and documenting RESTful APIs.

• Swagger provides a user-friendly interface for API documentation.

• It uses a standard format (OpenAPI Specification) to describe APIs.

• Developers can generate client libraries and server stubs from Swagger definitions.

• Example: A Swagger UI can display endpoints for a weather API, showing methods like GET /weather.

• Swagger allows ...read more

Language is a structured system of communication using symbols, sounds, or gestures to convey meaning.

• Language can be spoken, written, or signed, such as English, Spanish, or American Sign Language.

• It consists of grammar, vocabulary, and syntax that govern how words are combined.

• Language evolves over time, adapting to cultural and societal changes, like the emergence of slang.

• It serves various functions, including...read more

The expressions a+b2 and (a+b)2 represent different mathematical operations with distinct results.

• a+b2 means 'a plus b squared', calculated as a + (b * b). Example: If a=2 and b=3, then 2 + 3^2 = 2 + 9 = 11.

• (a+b)2 means 'the sum of a and b squared', calculated as (a + b) * (a + b). Example: If a=2 and b=3, then (2 + 3)^2 = 5^2 = 25.

• The first expression focuses on b's value, while the second combines both a and b b...read more

High level languages are closer to human language and easier to read/write, while low level languages are closer to machine code and harder to read/write.

• High level languages are more abstract and require less detailed instructions.

• Low level languages are more specific and require more detailed instructions.

• Examples of high level languages include Python, Java, and C#.

• Examples of low level languages include Assemb...read more