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HEPL - A Cavinkare Group Company Java Developer Interview Questions, Process, and Tips
Top HEPL - A Cavinkare Group Company Java Developer Interview Questions and Answers
- Q1. What is for loop?
- Q2. What is oops? And oops concept
- Q3. Joins and write a syntax for inner join
HEPL - A Cavinkare Group Company Java Developer Interview Experiences
6 interviews found
I applied via Walk-in and was interviewed in Nov 2024. There was 1 interview round.
(4 Questions)
- Q1. String functionality
- Q2. Array functionality
- Q3. Some project questions
- Q4. Joins and write a syntax for inner join
- Ans.
Inner join is used to combine rows from two or more tables based on a related column between them.
Use INNER JOIN keyword in SQL to perform inner join
Specify the columns to join on using ON keyword
Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column
Mohkeshvaren S
(3 Questions)
- Q1. What is oops in java
- Ans.
Object-oriented programming concepts in Java
OOPs stands for Object-Oriented Programming
Key concepts include classes, objects, inheritance, polymorphism, encapsulation
Java supports OOPs principles like abstraction, encapsulation, inheritance, and polymorphism
- Q2. Oops concepts in java
- Ans.
Object-oriented programming concepts in Java
Encapsulation: bundling data and methods that operate on the data into a single unit
Inheritance: allows a class to inherit properties and behavior from another class
Polymorphism: ability of an object to take on many forms
Abstraction: hiding the implementation details and showing only the necessary features of an object
- Q3. Some questions in mysql
Skills evaluated in this interview
I applied via Walk-in and was interviewed in May 2024. There was 1 interview round.
(3 Questions)
- Q1. What is for loop?
- Ans.
A for loop is a control flow statement for iterating a specific number of times.
Used to iterate over a range of values or elements in an array
Consists of initialization, condition, and increment/decrement expressions
Example: for(int i=0; i<5; i++) { System.out.println(i); }
- Q2. Collection in java?
- Ans.
Collections in Java are frameworks that provide an architecture to store and manipulate a group of objects.
Collections provide interfaces (List, Set, Map) and classes (ArrayList, LinkedList, HashSet, HashMap) to store and manipulate groups of objects.
Collections framework includes algorithms to manipulate data structures like sorting, searching, etc.
Collections are more flexible and efficient than arrays in Java.
Exampl...
- Q3. Exception handling in Java?
- Ans.
Exception handling in Java is a mechanism to handle runtime errors and prevent program crashes.
Use try-catch blocks to handle exceptions
Use finally block to execute code regardless of exception
Use throw keyword to manually throw exceptions
Use throws keyword in method signature to declare exceptions that can be thrown
Interview Preparation Tips
- Java basics
- Full stack course
Skills evaluated in this interview
UIUX94 Rathish.R .R
(2 Questions)
- Q1. Syntax for for loop
- Ans.
For loop syntax is used for iterating over a collection of elements in Java.
Syntax: for(initialization; condition; iteration) { // code block }
Initialization: executed before the loop starts
Condition: evaluated before each iteration, loop continues if true
Iteration: executed after each iteration
Example: for(int i=0; i<10; i++) { System.out.println(i); }
- Q2. Syntax for an array
- Ans.
Syntax for declaring an array in Java
Declare the array type followed by square brackets and the array name
Initialize the array using curly braces with values separated by commas
Example: String[] names = {"Alice", "Bob", "Charlie"}
Skills evaluated in this interview
HEPL - A Cavinkare Group Company interview questions for designations
I applied via Walk-in and was interviewed in May 2024. There was 1 interview round.
(2 Questions)
- Q1. For loop syntax?
- Ans.
For loop is used to iterate over a collection of elements in Java.
Syntax: for(initialization; condition; update) { // code block }
Example: for(int i=0; i<10; i++) { System.out.println(i); }
- Q2. What is string in Java?
- Ans.
A string in Java is a sequence of characters used to represent text.
Strings are objects in Java, created using the 'String' class.
Strings are immutable, meaning their values cannot be changed once they are created.
Strings can be concatenated using the '+' operator.
Example: String str = "Hello, World!";
Skills evaluated in this interview
Get interview-ready with Top HEPL - A Cavinkare Group Company Interview Questions
I applied via Walk-in and was interviewed in May 2023. There were 2 interview rounds.
(3 Questions)
- Q1. What is oops? And oops concept
- Ans.
OOPs stands for Object-Oriented Programming. It is a programming paradigm that uses objects to represent and manipulate data.
OOPs is based on the concept of classes and objects.
It focuses on encapsulation, inheritance, and polymorphism.
Encapsulation ensures data hiding and abstraction.
Inheritance allows the creation of new classes from existing ones.
Polymorphism enables objects to take on multiple forms.
Example: In Jav...
- Q2. Define Multitheding
- Ans.
Multithreading is the concurrent execution of two or more threads to achieve maximum utilization of CPU.
Multithreading allows multiple threads to run concurrently within a single program.
It improves performance by utilizing idle CPU time and executing multiple tasks simultaneously.
Threads can communicate and share resources, but synchronization is required to avoid conflicts.
Examples include running background tasks wh...
- Q3. What is exception handling
- Ans.
Exception handling is a mechanism in Java to handle runtime errors and prevent program crashes.
Exception handling allows programmers to catch and handle errors that occur during program execution.
It involves using try-catch blocks to catch exceptions and provide alternative code to handle the error.
The catch block specifies the type of exception to catch and the code to be executed when that exception occurs.
Java provi...
Skills evaluated in this interview
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Interview questions from similar companies
I applied via Naukri.com and was interviewed in Dec 2024. There was 1 interview round.
(8 Questions)
- Q1. How much exp in docker?
- Ans.
I have 2 years of experience working with Docker in various projects.
2 years of experience working with Docker in various projects
Proficient in creating Docker containers, managing images, and orchestrating containers using Docker Compose
Familiar with Docker Swarm and Kubernetes for container orchestration
Experience in troubleshooting Docker-related issues and optimizing container performance
- Q2. Do you have exp in Kubernetes?
- Ans.
Yes, I have experience in Kubernetes.
I have worked on deploying and managing applications on Kubernetes clusters.
I am familiar with creating and managing Kubernetes resources such as pods, deployments, services, and ingresses.
I have experience in using tools like kubectl and Helm for interacting with Kubernetes clusters.
I have implemented CI/CD pipelines using Kubernetes for automated deployment and scaling of applicat
- Q3. What is OOP?
- Ans.
OOP stands for Object-Oriented Programming, a programming paradigm based on the concept of objects.
OOP focuses on creating objects that contain data and methods to manipulate that data.
Encapsulation, inheritance, and polymorphism are key principles of OOP.
Examples of OOP languages include Java, C++, and Python.
- Q4. Types of polymorphism
- Ans.
Polymorphism in Java refers to the ability of a method to do different things based on the object it is acting upon.
Types of polymorphism in Java include method overloading and method overriding.
Method overloading is when multiple methods have the same name but different parameters.
Method overriding is when a subclass provides a specific implementation of a method that is already defined in its superclass.
- Q5. Thread in java
- Ans.
Threads in Java allow multiple tasks to run concurrently within a single program.
Threads are lightweight sub-processes that share the same memory space.
They are used to improve performance by allowing tasks to run simultaneously.
Examples include creating a new thread using the Thread class or implementing the Runnable interface.
- Q6. Knowledge in which spring modules
- Q7. What is spring profile
- Ans.
Spring profile is a way to segregate parts of your application configuration and make it only available in certain environments.
Spring profiles allow you to define different configurations for different environments such as development, testing, and production.
You can use @Profile annotation to specify which beans should be loaded based on the active profile.
Profiles can be activated in various ways such as through app...
- Q8. What is @PreAuthorize and @PostAuthorize
- Ans.
Annotations used in Spring Security to apply authorization rules before and after a method is called.
Used in Spring Security to define authorization rules
@PreAuthorize is used to apply authorization rules before a method is called
@PostAuthorize is used to apply authorization rules after a method is called
Both annotations support SpEL expressions for defining rules
Interview Preparation Tips
- Basics in java
- Spring security
- Spring Boot
- Docker
- Cloud Computing
Java Developer Interview Questions & Answers
EY Global Delivery Services ( EY GDS)
Anonymous
posted on 10 Dec 2024
(2 Questions)
- Q1. What are the design patterns you know in java
- Ans.
Design patterns in Java are reusable solutions to common problems in software design.
Creational patterns (e.g. Singleton, Factory, Builder)
Structural patterns (e.g. Adapter, Decorator, Facade)
Behavioral patterns (e.g. Observer, Strategy, Template Method)
- Q2. What is daimond problem
- Ans.
The diamond problem occurs in multiple inheritance when a class inherits from two classes that have a common ancestor, leading to ambiguity in method invocation.
Diamond problem arises in multiple inheritance when a class inherits from two classes that have a common ancestor.
It leads to ambiguity in method invocation as the compiler cannot determine which inherited method to invoke.
Example: Class A has a method 'display...
I applied via Naukri.com and was interviewed in May 2024. There were 3 interview rounds.
(2 Questions)
- Q1. Java concepts based on streams and oops concepts and singleton class
- Q2. DSA questions like first missing number and rotate array
(2 Questions)
- Q1. SQL queries based on group by and implementation of min heap
- Q2. Scenario based question like what data structure are used
(2 Questions)
- Q1. Java based questions like difference between interface and abstract class and spring boot rest API implementation
- Q2. Permutation of the number without duplicates
- Ans.
Generate all permutations of a given number without duplicates
Use backtracking to generate all possible permutations
Avoid duplicates by keeping track of used digits
Recursively swap digits to generate permutations
Skills evaluated in this interview
(2 Questions)
- Q1. Min stack write code with full operation
- Ans.
A min stack is a stack data structure that supports the usual push and pop operations, along with an additional operation to retrieve the minimum element in constant time.
Create a stack to store the elements and another stack to store the minimum values encountered so far.
When pushing an element, check if it is smaller than the current minimum. If so, push it onto the minimum stack.
When popping an element, check if it ...
- Q2. Graph and sql ,concept problem
(2 Questions)
- Q1. Merge Sort based tricky ques
- Q2. Island problem leetcode
Skills evaluated in this interview
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HEPL - A Cavinkare Group Company Java Developer Interview Process
based on 6 interviews
1 Interview rounds
- Technical Round
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