Capital Numbers Infotech Software Developer Interview Questions and Answers for Experienced

Q1. OOPS , multi thread, exception
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Q2. Java 8 features
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Moderate round . Easy to clear

Q1. Explain stream api
Ans. 
Stream API is a feature in Java that allows processing collections of objects in a functional style.
• Stream API provides a way to perform operations on a collection of objects in a declarative way.

• It supports functional-style operations like map, filter, reduce, and forEach.

• Streams can be created from various sources like collections, arrays, or I/O channels.

• Stream operations are lazy, meaning they are only executed whe...read more
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Q2. Data base connection in sprinh boot
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Database connection in Spring Boot is configured using application.properties or application.yml file.
• Define database connection properties in application.properties or application.yml file

• Use @EnableJpaRepositories annotation to enable JPA repositories

• Use @Entity annotation to define entity classes

• Use @Autowired annotation to inject the DataSource or EntityManager
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Q1. Why you want to join in mgs
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I want to join MGS because of its reputation for cutting-edge technology and innovative projects.
• Exciting opportunities for growth and learning

• Strong focus on technology and innovation

• Desire to work with talented and passionate individuals

• Alignment with company values and culture
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Q2. Notice period days
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Online aptitude test on basic mcqs

Q1. Core java, springboot, microservices, mysql questions
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Q2. Oops, collections questions
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Q3. Multithreading questions
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Q4. Exception questions
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Q1. What is four pillars of oops concepts
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Encapsulation, Inheritance, Polymorphism, Abstraction
• Encapsulation: Bundling data and methods that operate on the data into a single unit

• Inheritance: Ability of a class to inherit properties and behavior from another class

• Polymorphism: Ability to present the same interface for different data types

• Abstraction: Hiding the complex implementation details and showing only the necessary features
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Q2. Different between array and collection
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Arrays are fixed in size and store elements of the same data type, while collections are dynamic in size and can store elements of different data types.
• Arrays have a fixed size, while collections can dynamically resize.

• Arrays store elements of the same data type, while collections can store elements of different data types.

• Arrays use indexes to access elements, while collections use iterators or other methods.

• Examples:...read more
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Q1. Why strings are immutable
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Strings are immutable to ensure data integrity and security by preventing accidental or intentional modification.
• Immutable strings prevent accidental changes to data

• Enhances security by preventing data tampering

• Allows for efficient memory management
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Q2. Count the number of repeated words from the given string
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Count the number of repeated words in a given string
• Split the string into words using a delimiter like space

• Create a hashmap to store word frequencies

• Iterate through the words and update the hashmap accordingly

• Count the number of words with frequency greater than 1
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Difficulty level is medium

Q1. Medium about java and database
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Q1. Medium level - about project
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Basic Programming questions will be there

Q1. Why Java is most secured!?
Ans. 
Java is most secured due to its strong memory management, bytecode verification, and security manager.
• Java's strong memory management prevents buffer overflow and other memory-related vulnerabilities.

• Bytecode verification ensures that the code is safe to execute and prevents malicious code from running.

• Security manager allows fine-grained control over access to system resources.

• Java also has a robust set of security AP...read more
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Q2. Explain how Java program execute?
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Java programs are executed by the Java Virtual Machine (JVM) which interprets and executes the bytecode generated by the Java compiler.
• Java source code is compiled into bytecode by the Java compiler

• The bytecode is platform-independent and can be executed on any device with a JVM

• The JVM interprets the bytecode and executes the instructions

• The JVM manages memory, handles exceptions, and provides other runtime services

• Exa
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Q1. Communication and basic technical questions
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