Labcorp Java Developer Interview Questions and Answers

C,c++ questions and two coding questions. basic mcq

Q1. Treeset, hashset difference
Ans. 
TreeSet and HashSet are both implementations of the Set interface in Java, but they have some key differences.
• TreeSet is a sorted set that maintains elements in ascending order, while HashSet does not guarantee any specific order.

• TreeSet uses a Red-Black tree data structure for storage, which allows for efficient retrieval of elements in sorted order.

• HashSet uses a hash table for storage, which provides constant-time p...read more
Answered by AI
Add your answer
Q2. Oops concept, dbms, programming questions
Add your answer
Q3. Set and treeset and hashset
Add your answer

Q1. Prepare well on arrays, lists and its operations
Add your answer
Q2. Get to know well about your current project
Add your answer

Q1. Oops related insharitance encapsulation
Add your answer

Q1. React hooks, Explain using code
Ans. 
React hooks are functions that let you use state and other React features without writing a class.
• Hooks are functions that let you use state and other React features in functional components

• useState() is a hook that allows you to add state to functional components

• useEffect() is a hook that allows you to perform side effects in functional components

• useContext() is a hook that allows you to use the context API in functio
Answered by AI
Add your answer
Q2. Factory Patterns?
Add your answer
Q3. Liskov Substitution Principle
Ans. 
Liskov Substitution Principle states that objects of a superclass should be replaceable with objects of its subclasses without affecting the program's correctness.
• Subtypes must be substitutable for their base types.

• Derived classes must be able to replace their base classes without affecting the program's behavior.

• Violating this principle can lead to unexpected behavior and errors in the code.

• Example: If a program expec...read more
Answered by AI
Add your answer
Q4. Oops Concept and give examples
Ans. 
Oops concept is a programming paradigm that focuses on objects and classes.
• Oops stands for Object-Oriented Programming

• Key concepts include inheritance, encapsulation, polymorphism, and abstraction

• Examples: Class Car with properties like make, model, and methods like start(), stop()

• Example: Inheritance - Class SUV extends Car and adds property numSeats
Answered by AI
Add your answer
Q5. JQuery - Ajax mechanisms
Add your answer
Q6. Docker and Kubernetes - Azure concepts
Add your answer

Computer fundamentals

Q1. Technical questions of projects ,dsa
Add your answer

Q1. What is ur background
Add your answer
Q2. Manegarial and behavioral questions
Add your answer

Aptitude, core concepts and a code

Q1. What is the one thing you learnt from college club?
Ans. 
I learned the importance of teamwork and collaboration from my college club.
• Developed strong communication skills by working with diverse group of individuals

• Learned how to delegate tasks effectively to achieve common goals

• Gained experience in problem-solving and conflict resolution through group projects
Answered by AI
Add your answer
Q2. What is the one thing you want to expereince?
Ans. 
I want to experience living in a different country and immersing myself in a new culture.
• Traveling to a foreign country and learning about their customs and traditions

• Trying new foods and experiencing different ways of life

• Making friends with locals and exploring the local attractions
Answered by AI
Add your answer

Q1. Difference between relational and non relational dbms
Ans. 
Relational DBMS stores data in tables with predefined relationships, while non-relational DBMS stores data in flexible, schema-less formats.
• Relational DBMS uses structured query language (SQL) for querying data

• Non-relational DBMS can store data in various formats like key-value pairs, document-based, graph databases

• Relational DBMS ensures data integrity through normalization and constraints

• Non-relational DBMS offers be...read more
Answered by AI
Add your answer
Q2. Difference betweeen class,abstract class,interface in python
Ans. 
Class is a blueprint for creating objects, abstract class cannot be instantiated and can have abstract methods, interface is a contract for classes to implement certain methods.
• Class is a blueprint for creating objects with attributes and methods.

• Abstract class cannot be instantiated and can have abstract methods that must be implemented by subclasses.

• Interface is a contract for classes to implement certain methods, bu
Answered by AI
Add your answer
Q3. Project related questions were asked
Add your answer