Infosys Senior Software Engineer Interview Questions, Process, and Tips

Q1. What is final varible in java
Ans. 
A final variable in Java is a variable that cannot be reassigned once it has been initialized.
• Final variables are declared using the 'final' keyword.

• They can be assigned a value only once.

• Final variables are often used to represent constants or values that should not be changed.

• They can be declared at the class, method, or block level.

• Final variables can be used in method parameters, local variables, instance variables
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Q2. In interview they have asked final VARIBLE
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Q1. What is middleware, express framework
Ans. 
Middleware is software that acts as a bridge between different applications or components. Express is a web application framework for Node.js.
• Middleware is software that handles communication between different systems or components

• Express is a popular web application framework for Node.js

• Express simplifies the process of building web applications by providing a set of features and tools

• Middleware in Express can be used...read more
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Q2. Explain hoisting in javascript, aggregation in mongodb
Ans. 
Hoisting in JavaScript refers to the behavior where variable and function declarations are moved to the top of their containing scope during compilation. Aggregation in MongoDB is the process of combining data records and expressing them in a summarized form.
• Hoisting in JavaScript allows you to use a variable or function before it is declared, as long as it is declared somewhere in the scope.

• Aggregation in MongoDB invo...read more
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Q1. Write code for palindrome string
Ans. 
Code to check if a string is a palindrome or not.
• Create a function that takes a string as input

• Remove all non-alphanumeric characters and convert to lowercase

• Compare the string with its reverse to check if it's a palindrome
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Q2. Questions on routing in nodejs using express
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Q1. Oops concepts basics interface vs abstact
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Provide a give example of Palindrome

Q1. Reverse an array
Ans. 
Reverse an array of strings
• Create a new array and iterate through the original array in reverse order, adding each element to the new array

• Alternatively, swap elements from the beginning and end of the array until reaching the middle
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