BMC Software Java Developer Interview Questions and Answers

Q1. Cycle sort based question
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Q2. Streams api, optional, lambda implementation
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Q3. Hashmap iteration ways
Ans. 
There are multiple ways to iterate over a HashMap in Java.
• Using keySet() and values() methods

• Using entrySet() method

• Using forEach() method with lambda expression
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Q4. Method overriding based code question -> guess the output
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Method overriding in Java with code example
• Output will be 'Child class method' as the method in Child class overrides the method in Parent class

• Method overriding is a feature that allows a subclass to provide a specific implementation of a method that is already provided by its superclass

• The method in the subclass should have the same name, return type, and parameters as the method in the superclass
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Q5. Write API to save data
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API to save data in Java
• Use HTTP POST method to send data to the server

• Create a RESTful endpoint to handle the data saving

• Validate the input data before saving it to the database
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20 aptitude,20 comunication,4 program questions

General topics . topics about online class vs office line class

Q1. In this round also they mainly check communication.after that basic questions about the what you put on your resume
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Q1. General round. In this round they told about the company and bond
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Q1. Explain Sonarqube, different type of code smells, and how its implemented in CI CD
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Sonarqube is a static code analysis tool used to detect code smells and bugs in code. It is integrated into CI/CD pipelines for continuous code quality checks.
• Sonarqube is a static code analysis tool that identifies code smells, bugs, and security vulnerabilities in code.

• Code smells are common programming issues that may indicate a deeper problem in the code. Examples include duplicated code, long methods, and complex ...read more
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Q2. Write a program to find the numbers divisble by 3 in a string - and reverse its indexes eg : - input : String s = "123456789" output String s = "129456783"
Ans. 
Program to find numbers divisible by 3 in a string and reverse their indexes.
• Iterate through the string and check if each character is a number divisible by 3.

• Store the divisible numbers in an array and reverse their indexes.

• Join the array back into a string and return the result.
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Q1. To connect to your DB what you use in Spring boot
Ans. 
In Spring Boot, we use Spring Data JPA to connect to the database.
• Use @EnableJpaRepositories annotation in the main application class to enable JPA repositories

• Define datasource properties in application.properties or application.yml file

• Use @Entity annotation to define JPA entities

• Use JpaRepository interface to perform CRUD operations on entities
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Q2. What is Component Scan
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Component Scan is a feature in Spring framework that automatically scans and registers Spring components in the application context.
• Component Scan is used to automatically detect and register Spring components like @Component, @Service, @Repository, and @Controller.

• It eliminates the need for manual configuration of bean definitions in the Spring configuration file.

• Component Scan can be configured with base package(s) t...read more
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Q3. Throw vs throws
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throw is used to explicitly throw an exception in a method, while throws is used in method signature to declare the exceptions that can be thrown by the method.
• throw is used within a method to throw an exception, while throws is used in the method signature to declare the exceptions that can be thrown by the method

• throw is followed by an exception object, while throws is followed by the exception class names separated ...read more
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Q1. Java8 coding to filter the vowels
Ans. 
Using Java8 to filter vowels from an array of strings
• Use Java8 stream and filter to iterate through each string in the array

• Use a lambda expression to check if each character is a vowel

• Collect the filtered strings into a new array
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Q2. Java8, Multi Threading, Hibernate, JPA
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30 multiple choice questions

Two coding questions

Q1. Oops questions like main principles of oops
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Q1. Deep in project
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Q1. Self intro, family background,some hr questions
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Q1. Explain your Project. What features you have made Git related questions like code merge pull Jira tool Java questions mostly from collectiions Springboot related question Then some design pattern.
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