Analyticsfox Softwares Software Developer Interview Questions, Process, and Tips

Q1. What is oops ? explain all pillars
Ans. 
Object-oriented programming is a programming paradigm based on the concept of objects, which can contain data and code.
• OOPs stands for Object-Oriented Programming

• The four pillars of OOPs are Inheritance, Encapsulation, Abstraction, and Polymorphism

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

• Encapsulation is the bundling of data with the methods that operate on that data

• Abstraction is...read more
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Q2. Why we use exception and how to handle exception.
Ans. 
Exceptions are used to handle unexpected errors in code. They help in maintaining the flow of the program by catching and handling errors.
• Exceptions are used to handle runtime errors that occur during the execution of a program.

• They help in maintaining the flow of the program by catching and handling errors, preventing the program from crashing.

• Exception handling involves using try, catch, and finally blocks to handle ...read more
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Q3. Difference between list and set.
Ans. 
List is an ordered collection of elements with duplicates allowed, while set is an unordered collection of unique elements.
• List maintains the order of elements, while set does not guarantee any specific order.

• List allows duplicate elements, while set does not allow duplicates.

• List is typically implemented using arrays or linked lists, while set is implemented using hash tables or trees.

• Example: List - [1, 2, 3, 1], Set
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Q4. Explain servlet life cycle.
Ans. 
Servlet life cycle includes initialization, service, and destruction phases.
• Initialization phase: servlet is loaded, instantiated, and initialized.

• Service phase: servlet handles client requests and generates responses.

• Destruction phase: servlet is removed from service and garbage collected.

• Example: init() method is called during initialization phase.
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1)Create employee class and find those employee name who have got saley less than 1000 using java 8.
Find second highest salary in employee table in sql