Mphasis Java Developer Interview Questions and Answers for Freshers

Good coding questions related array and string

Collection , logical

Q1. Opps ,spring boot
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Q2. Explain opps concept, what is spring boot
Ans. 
OOPs concept is a programming paradigm based on the concept of objects, Spring Boot is a framework for building Java applications.
• OOPs concept stands for Object-Oriented Programming, which focuses on creating objects that interact with each other to solve problems.

• It involves concepts like inheritance, encapsulation, polymorphism, and abstraction.

• Spring Boot is a framework that simplifies the development of Java applic...read more
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Q3. What is controller and rest controller
Ans. 
Controller is a class that handles user requests and returns appropriate response. Rest controller is a specialized controller for RESTful web services.
• Controller is a class in MVC architecture that handles user requests and interacts with the model and view.

• Rest controller is a specialized controller in Spring framework for building RESTful web services.

• Rest controller uses annotations like @RestController and @Reques...read more
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Q4. Internal working of hashmap
Ans. 
HashMap is a data structure that stores key-value pairs and uses hashing to efficiently retrieve values.
• 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 find 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.

• HashMap allows null keys and values, but only one null ...read more
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Q5. Who is best jdbc or hibernate
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Q1. Given a String s = "aaaaa", find the count of substring matching given pattern "aa". Output : 4
Ans. 
Count the occurrences of a given pattern in a string.
• Iterate through the string and check for the pattern at each position

• Increment a counter whenever the pattern is found

• Return the final count
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Reasoning topics,Java logica programming

Q1. Oops concepts java Database in SQL
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Q2. Introduction your self
Ans. 
I am a Java Developer with 5 years of experience in developing web applications.
• I have a strong understanding of Java programming language and its frameworks like Spring and Hibernate.

• I have experience in developing RESTful APIs and working with databases like MySQL and Oracle.

• I am familiar with front-end technologies like HTML, CSS, and JavaScript.

• I have worked on projects that involved integrating third-party APIs an...read more
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Q3. Oops concepts java College academy project
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Stark from Java developer kidea

Java developer kidas he GD kidas using from java developer kidas

Java ful stops developer kidas iñ conding language

In coding round it have 5 questions in it.
But i solved 4 of them.
Then I got a mail regarding interview for 4.5package

Q1. Everything related to java and one code
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Q1. Conversation from linked list to array list
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Q1. A technical aptitude test is an assessment
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Q2. Tell me about your self
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Q3. Why do u want to work for us
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Q4. Why should we hire you
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Q5. Are you a team plyer
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Q6. Finished the question
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Q7. What is your greatest achievement
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Q8. You see in your five.
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Reasoning ,verbal ,logical ,numerical coding

90 Minutes of MCQ and coding test

Q1. Topics on java8, spring boot, Microservices, MySQL.
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Q2. Explain Streams
Ans. 
Streams in Java are sequences of elements that support functional-style operations.
• Streams allow for processing sequences of elements in a functional style.

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

• Operations on streams can be intermediate (e.g. filter, map) or terminal (e.g. forEach, collect).

• Streams promote parallel processing and lazy evaluation for improved performance.

• ...read more
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Q3. Working of HashMap
Ans. 
HashMap is a data structure in Java that stores key-value pairs and allows fast retrieval of values based on keys.
• HashMap uses hashing to store key-value pairs, which allows for fast retrieval of values.

• Keys in a HashMap must be unique, but values can be duplicated.

• HashMap allows null keys and null values.

• HashMap is not synchronized, so it is not thread-safe. To make it thread-safe, you can use ConcurrentHashMap.

• Exampl...read more
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Q4. Spring boot annotations
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Q5. Spring security
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