Infosys Software Engineer Interview Questions, Process, and Tips

Maths and reasoning problem solving

Discuss the topic of our environment

Q1. About myself and my skills
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Q2. Decision making
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Q1. Lifecycle methods of React components
Ans. 
Lifecycle methods are functions that are called at different stages of a component's life in React.
• Mounting: constructor(), render(), componentDidMount()

• Updating: render(), componentDidUpdate()

• Unmounting: componentWillUnmount()

• Error Handling: componentDidCatch()
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Q2. Difference between state and props
Ans. 
State is mutable data owned and managed by a component, while props are immutable data passed to a component.
• State is used to store and manage data within a component, while props are used to pass data from a parent component to a child component.

• State can be changed using setState() method, while props cannot be changed directly.

• State is only accessible within the component it is defined in, while props can be accesse...read more
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General mathematics and apti questions

Object oriented programming in c and c++, some OS

Q1. Oops question and dbms
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Q2. Reverse a linked list
Ans. 
Reverse a linked list by changing the pointers direction
• Start with three pointers: current, previous, and next

• Iterate through the linked list, updating the pointers to reverse the direction

• Update the head of the linked list to be the previous node
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Practice more in Array and String level question

Aptitude test was good

Q1. Final keyword in Java
Ans. 
Final keyword in Java is used to restrict the user from changing the value of a variable, making it a constant.
• Final keyword can be applied to variables, methods, and classes

• Final variables must be initialized and cannot be reassigned

• Final methods cannot be overridden in subclasses

• Final classes cannot be subclassed
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Q2. Static keyword in Java
Ans. 
Static keyword in Java is used to create class-level variables and methods that can be accessed without creating an instance of the class.
• Static variables are shared among all instances of a class

• Static methods can be called without creating an object of the class

• Static blocks are used to initialize static variables
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