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ecs business solutions Senior Software Engineer Interview Questions and Answers
7 Interview questions
Java Collection Framework is a set of classes and interfaces that provide various data structures and algorithms to store and manipulate collections of objects.
Includes interfaces like List, Set, Queue, and classes like ArrayList, LinkedList, HashSet, PriorityQueue
Provides implementations for common data structures like lists, sets, maps, queues, stacks
Offers algorithms for searching, sorting, and manipulating col...
Different ways to create strings in Java include using string literals, the new keyword, and the String class constructor.
String literals: String str = "Hello World";
Using new keyword: String str = new String("Hello World");
String class constructor: char[] charArray = {'H', 'e', 'l', 'l', 'o'}; String str = new String(charArray);
Singleton design pattern ensures a class has only one instance and provides a global point of access to it.
Singleton pattern restricts the instantiation of a class to one object.
It provides a way to access the unique instance of the class globally.
Commonly used in scenarios where only one instance of a class is needed, such as database connections or logging.
Implementation can be achieved using static variables, l...
StringBuffer is synchronized and thread-safe, while StringBuilder is not synchronized and faster.
StringBuffer is synchronized, meaning it is thread-safe and multiple threads can access it at the same time without any issues.
StringBuilder is not synchronized, making it faster but not thread-safe. It is recommended for single-threaded operations.
Use StringBuffer when working with multiple threads and synchronization...
OOP is a programming paradigm based on the concept of objects, which can contain data in the form of fields and code in the form of procedures.
OOP focuses on creating objects that interact with each other to solve complex problems
Objects have attributes (data) and methods (functions) that operate on the data
Encapsulation, inheritance, and polymorphism are key principles of OOP
Example: A car object with attributes ...
ArrayList is implemented as a resizable array, while LinkedList is implemented as a doubly linked list.
ArrayList provides fast random access and slower insertion/deletion, while LinkedList provides fast insertion/deletion and slower random access.
ArrayList uses less memory overhead compared to LinkedList.
Example: ArrayList is more suitable for scenarios where random access is frequent, while LinkedList is more sui...
HashMap is a data structure that stores key-value pairs and uses hashing to quickly retrieve values based on keys.
HashMap internally uses an array of linked lists to store key-value pairs.
When a key-value pair is added, the key is hashed to determine the index in the array where it will be stored.
If multiple keys hash to the same index, a linked list is used to handle collisions.
To retrieve a value, the key is has...
ecs business solutions Senior Software Engineer Interview Experiences
1 interview found
Anonymous
Selected
I applied via Naukri.com and was interviewed before Dec 2023. There were 2 interview rounds.
(10 Questions)
- Q1. What is your explanation of Object-Oriented Programming (OOP) with a real-world example?
- Ans.
OOP is a programming paradigm based on the concept of objects, which can contain data in the form of fields and code in the form of procedures.
OOP focuses on creating objects that interact with each other to solve complex problems
Objects have attributes (data) and methods (functions) that operate on the data
Encapsulation, inheritance, and polymorphism are key principles of OOP
Example: A car object with attributes like ...
- Q2. Explain Singleton Design patten
- Ans.
Singleton design pattern ensures a class has only one instance and provides a global point of access to it.
Singleton pattern restricts the instantiation of a class to one object.
It provides a way to access the unique instance of the class globally.
Commonly used in scenarios where only one instance of a class is needed, such as database connections or logging.
Implementation can be achieved using static variables, lazy i...
- Q3. What is the Java Collection Framework?
- Ans.
Java Collection Framework is a set of classes and interfaces that provide various data structures and algorithms to store and manipulate collections of objects.
Includes interfaces like List, Set, Queue, and classes like ArrayList, LinkedList, HashSet, PriorityQueue
Provides implementations for common data structures like lists, sets, maps, queues, stacks
Offers algorithms for searching, sorting, and manipulating collecti...
- Q4. What is the difference between an ArrayList and a LinkedList?
- Ans.
ArrayList is implemented as a resizable array, while LinkedList is implemented as a doubly linked list.
ArrayList provides fast random access and slower insertion/deletion, while LinkedList provides fast insertion/deletion and slower random access.
ArrayList uses less memory overhead compared to LinkedList.
Example: ArrayList is more suitable for scenarios where random access is frequent, while LinkedList is more suitable...
- Q5. What is the internal working of a HashMap?
- Ans.
HashMap is a data structure that stores key-value pairs and uses hashing to quickly retrieve values based on keys.
HashMap internally uses an array of linked lists to store key-value pairs.
When a key-value pair is added, the key is hashed to determine the index in the array where it will be stored.
If multiple keys hash to the same index, a linked list is used to handle collisions.
To retrieve a value, the key is hashed a...
- Q6. Basic SQL Questions: Explain trigger Difference between primary key and Unique key Type of Join SQL programming question based on joins
- Q7. Different ways to create string in java?
- Ans.
Different ways to create strings in Java include using string literals, the new keyword, and the String class constructor.
String literals: String str = "Hello World";
Using new keyword: String str = new String("Hello World");
String class constructor: char[] charArray = {'H', 'e', 'l', 'l', 'o'}; String str = new String(charArray);
- Q8. Difference between StringBuffer and StringBuilder?
- Ans.
StringBuffer is synchronized and thread-safe, while StringBuilder is not synchronized and faster.
StringBuffer is synchronized, meaning it is thread-safe and multiple threads can access it at the same time without any issues.
StringBuilder is not synchronized, making it faster but not thread-safe. It is recommended for single-threaded operations.
Use StringBuffer when working with multiple threads and synchronization is r...
- Q9. MultiThreading related questions
- Q10. Java 8 Features
(4 Questions)
- Q1. Explain current project
- Ans.
Developing a web application for inventory management system
Using React for front-end development
Implementing RESTful APIs with Node.js for back-end
Utilizing PostgreSQL for database management
- Q2. Questions about multithreading
- Q3. What challenges have you faced on your current project, and how have you handled those situations?
- Ans.
I have faced challenges with integrating a new third-party API and resolving performance issues.
Integrating a new third-party API required extensive research and testing to ensure compatibility with existing systems.
Resolving performance issues involved analyzing code, identifying bottlenecks, and implementing optimizations.
Collaborating with team members to troubleshoot and address issues in a timely manner.
Prioritizi...
- Q4. Hobbies
Interview Preparation Tips
- OOPS
- Design patten
- Multithreading
- Collections
- Lambda
- functional interface
- SQL
- SQL Join
Top trending discussions
Interview questions from similar companies
I applied via LinkedIn and was interviewed before Jul 2020. There were 4 interview rounds.
Interview Questionnaire
4 Questions
- Q1. Which technologies your interested to work
- Q2. Question related to Java coding
- Q3. Question from C language
- Q4. Question from AI & ML
Interview Preparation Tips
I applied via Company Website and was interviewed before Oct 2020. There were 3 interview rounds.
Interview Questionnaire
1 Question
- Q1. Tell me about your experience
Interview Preparation Tips
I applied via Amcat and was interviewed before Jul 2021. There were 2 interview rounds.
Refer R S Agarwal book for apptitude
(1 Question)
- Q1. Write a c program on fractional numbers
- Ans.
A C program to perform arithmetic operations on fractional numbers.
Use float or double data type to store fractional numbers.
Use scanf() to take input from the user.
Perform arithmetic operations like addition, subtraction, multiplication, and division.
Use printf() to display the result.
Interview Preparation Tips
Skills evaluated in this interview
I applied via Company Website and was interviewed before Feb 2020. There was 1 interview round.
Interview Questionnaire
2 Questions
- Q1. They asked about dbms questions in the form of table formate
- Q2. They asked code for some python program
Interview Preparation Tips
I applied via LinkedIn and was interviewed before Jan 2021. There was 1 interview round.
Interview Questionnaire
1 Question
- Q1. 1. tell me about yourself
Interview Preparation Tips
I applied via Recruitment Consulltant and was interviewed before Feb 2021. There were 3 interview rounds.
1.It covers all aptitude topics, and English sentences
2.Essay writing
3.Coding
(2 Questions)
- Q1. In TR , languages which u mentioned in resume they will ask Basic programing Questions on Btech project They will say one idea , we need to tell the logic how can we develop (it may varies)
- Q2. Testing questions Polymorphism, abstraction,constructors, SQL basics
(5 Questions)
- Q1. What is your family background?
- Q2. Why should we hire you?
- Q3. Tell me about yourself.
- Q4. What are your strengths and weaknesses?
- Q5. Knowledge about updated technologies
Interview Preparation Tips
I applied via Naukri.com and was interviewed before Mar 2021. There were 3 interview rounds.
(6 Questions)
- Q1. What is your family background?
- Ans.
I come from a supportive family that values education and hard work, which has greatly influenced my career path in technology.
Parents: My parents are both educators, instilling a love for learning and curiosity in me from a young age.
Siblings: I have a younger sister who is pursuing a degree in computer science, and we often collaborate on tech projects together.
Family Values: Our family emphasizes the importance of p...
- Q2. Why should we hire you?
- Ans.
I bring a unique blend of technical skills, problem-solving abilities, and a passion for innovation that aligns with your team's goals.
Strong technical skills: Proficient in languages like Python and Java, demonstrated by developing a web application that improved user engagement by 30%.
Problem-solving mindset: Successfully resolved a critical bug in a production system under tight deadlines, ensuring minimal downtime.
...
- Q3. Where do you see yourself in 5 years?
- Q4. What are your salary expectations?
- Ans.
I expect a competitive salary based on my skills, experience, and industry standards, ideally in the range of $X to $Y.
Research industry standards: For example, Glassdoor or Payscale can provide insights into average salaries for similar roles.
Consider your experience: If you have 5 years of experience, you might expect a higher salary than someone just starting.
Factor in location: Salaries can vary significantly based...
- Q5. What are your strengths and weaknesses?
- Ans.
I excel in problem-solving and teamwork, but I sometimes struggle with time management under tight deadlines.
Strength: Strong problem-solving skills - I enjoy tackling complex coding challenges, like optimizing algorithms for better performance.
Strength: Effective teamwork - I thrive in collaborative environments, having successfully led a project with cross-functional teams.
Weakness: Time management - I occasionally u...
- Q6. Tell me about yourself.
(1 Question)
- Q1. Do you have technical certifications? How many programming languages do you known? How many development tools have you used?
- Ans.
Yes, I have technical certifications and I am proficient in multiple programming languages and development tools.
I have certifications in Java and Python
I am proficient in Java, Python, C++, and JavaScript
I have used development tools such as Eclipse, Visual Studio Code, and PyCharm
Interview Preparation Tips
Move frequently
value your reputation
Get experience at a any company
I applied via Company Website and was interviewed before Jan 2021. There were 2 interview rounds.
(1 Question)
- Q1. Oops based , C# Fundamental , Sql , Jquery , Mvc architecture
(1 Question)
- Q1. ADVANCED QUESTION ON sql ,
Interview Preparation Tips
I applied via Job Portal and was interviewed before Dec 2019. There was 1 interview round.
Interview Questionnaire
1 Question
- Q1. First they ask basic questions like HTML SQL Java.
Interview Preparation Tips
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