Optym Software Developer Interview Questions and Answers

Q1. About yourself and background only
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Q1. Basic Java Question with 2 pseudo code in F2f
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Q2. Decent interiew java8 string
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Java 8 introduced new features for working with strings.
• Java 8 added the join() method to String class for joining strings with a delimiter.

• The String class now has methods like chars(), codePoints(), and lines() for working with characters and lines.

• The StringJoiner class can be used to construct sequences of characters separated by a delimiter.
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Q1. Code snippet will be give, provide output Questions on ooops, java 8 programming
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Q1. Write a program to reverse a link list
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Program to reverse a linked list
• Create a function to reverse the linked list by changing the next pointers

• Use three pointers to keep track of current, previous, and next nodes

• Iterate through the list and update the pointers accordingly

• Return the new head of the reversed linked list
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Aptitude questions with some basic coding questions

They have given 3 coding questions and some pseudo codings

Q1. Tell about your self
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Q2. Some coding questions
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Q1. What are oops concepts in java, explain real time scenario
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OOPs concepts in Java include inheritance, polymorphism, encapsulation, and abstraction.
• Inheritance allows a subclass to inherit properties and methods from a superclass.

• Polymorphism allows objects to take on multiple forms and behave differently based on their context.

• Encapsulation hides the implementation details of an object and only exposes necessary information.

• Abstraction allows for the creation of abstract class...read more
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Q2. Uses of interface, inheritance
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Interfaces define contracts for behavior, while inheritance allows for code reuse and polymorphism.
• Interfaces allow for loose coupling and abstraction, enabling multiple implementations of the same behavior.

• Inheritance allows for code reuse and extension of existing classes, reducing code duplication.

• Polymorphism allows objects of different classes to be treated as if they were of the same class, simplifying code and i
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Q3. SQL query for join of tables
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SQL query for joining tables
• Use JOIN keyword to combine two or more tables based on a related column

• Specify the columns to be selected using SELECT keyword

• Use ON keyword to specify the condition for joining the tables

• Different types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL OUTER JOIN
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Q4. Java concepts used in your project
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Used Java concepts such as inheritance, polymorphism, and exception handling in my project.
• Implemented inheritance to create a base class and derived classes with specific functionalities.

• Utilized polymorphism to allow objects of different classes to be treated as if they were of the same class.

• Implemented exception handling to handle errors and prevent program crashes.

• Used interfaces to define a set of methods that a ...read more
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Q5. Overloading vs overriding, practical uses
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Overloading is having multiple methods with the same name but different parameters. Overriding is having a method in a subclass with the same name and parameters as a method in the superclass.
• Overloading is used to provide different ways to call a method with different parameters

• Overriding is used to provide a specific implementation of a method in a subclass

• Overloading is resolved at compile-time while overriding is r...read more
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It consists 2 coding questions and you have to answer in 40 mins

Q1. HR asked general questions about yourself
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Q2. Done discussion related to projects and experience
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