Mphasis UI Lead Interview Questions and Answers

Q1. What is the architecture of the Java Virtual Machine (JVM)?
Ans. 
The Java Virtual Machine (JVM) is an abstract computing machine that enables a computer to run Java programs.
• JVM is platform-independent and converts Java bytecode into machine code.

• It consists of class loader, runtime data areas, execution engine, and native method interface.

• JVM memory is divided into method area, heap, stack, and PC register.

• Examples of JVM implementations include Oracle HotSpot, OpenJ9, and GraalVM.
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Q2. What is the default connection pooling in Spring Boot, and how can it be customized?
Ans. 
The default connection pooling in Spring Boot is HikariCP, which can be customized through properties in the application.properties file.
• HikariCP is the default connection pooling library in Spring Boot, known for its high performance and low overhead.

• To customize the connection pooling, you can modify properties like 'spring.datasource.hikari.*' in the application.properties file.

• For example, you can set maximum pool ...read more
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Q3. What are the best practices for optimizing a Spring Boot application?
Ans. 
Best practices for optimizing a Spring Boot application
• Use Spring Boot Actuator to monitor and manage application performance

• Implement caching mechanisms like Spring Cache to reduce database calls

• Optimize database queries and indexes for better performance

• Use asynchronous processing with Spring's @Async annotation for non-blocking operations

• Profile and analyze application performance using tools like VisualVM or JProfi
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Q4. What is a heap dump, and how can it be used to identify memory leaks?
Ans. 
A heap dump is a snapshot of the memory usage of a Java application at a specific point in time.
• Heap dumps can be generated using tools like jmap or VisualVM.

• They provide detailed information about objects in memory, their sizes, and references.

• Analyzing a heap dump can help identify memory leaks by pinpointing objects that are consuming excessive memory.

• Common signs of memory leaks in a heap dump include a large numbe...read more
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Q5. How can you diagonally iterate through and print the elements of a 2D array?program
Ans. 
Diagonally iterate through and print elements of a 2D array of strings.
• Use nested loops to iterate through rows and columns of the 2D array.

• Calculate the diagonal elements by incrementing row and column indices together.

• Print the elements as you iterate through the diagonal of the array.
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Q1. What is Ppk and Cpk in Six Sigma??
Ans. 
Ppk and Cpk are process capability indices used in Six Sigma to measure the ability of a process to produce output within specification limits.
• Ppk and Cpk are statistical measurements that assess how well a process is performing in relation to its specification limits.

• Ppk measures the potential capability of a process to produce output within specification limits, while Cpk measures the actual capability of a process t...read more
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Q2. What are the different types of risks??
Ans. 
Different types of risks include financial, operational, strategic, compliance, and reputational risks.
• Financial risk: related to the potential loss of financial resources, such as market risk, credit risk, and liquidity risk.

• Operational risk: arises from internal processes, systems, or people, leading to errors, fraud, or disruptions.

• Strategic risk: involves the impact of business decisions on the organization's long-...read more
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Q1. Explain ISO 13485 implementation in your current employer?
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Q2. What the curves on the Probability plot denotes?
Ans. 
Probability plot curves denote the distribution of data points compared to a theoretical distribution.
• Probability plot curves help visualize how well a dataset fits a particular distribution.

• The curves can indicate if the data is normally distributed or follows a different distribution.

• Examples of probability plots include Q-Q plots and P-P plots.
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Q1. Salary discussed
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Q2. Nothing more than the salary discussed
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Q1. Fake Interview, Didn't expect this from virtusa
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Q2. FakeInterviews conducted, Didn;t expect this from virtusa
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Q3. Virtusa Scammers
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Q1. What is closure?
Ans. 
Closure is a function that has access to its own scope, as well as the scope in which it was defined.
• Closure allows a function to access variables from its outer function even after the outer function has finished executing.

• It helps in maintaining state in asynchronous operations.

• Example: function outerFunction() { let outerVar = 'I am outer'; return function innerFunction() { console.log(outerVar); }; }
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Q2. Define hooks in react?
Ans. 
Hooks in React are functions that let you use state and other React features without writing a class.
• Hooks were introduced in React 16.8 to allow functional components to have state and lifecycle methods.

• useState() is a hook that allows you to add state to functional components.

• useEffect() is a hook that allows you to perform side effects in functional components.

• Custom hooks are reusable functions that can contain log...read more
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Hacker Rank test, problem solving. Java 8

Q1. Java 8 feature related questions.
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Q2. Jvm architecture and memory management
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Q3. Sql self join query and query tuning
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Q4. Spring boot microservices design pattern discussion
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Q1. Problem solving based on java and case study
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Q2. Team handling and management skills
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Q3. Docker and Orchetratetion framework
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Q4. Aws cloud and cicd and related technologies
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Q1. Questions on core java concepts
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Q2. Questions on SQL and Springboot
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Q1. Questions on Collection framework.
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Q2. Questions on Springboot and core java
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Q1. Scenario based question
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Q2. Stream API questions
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Q1. Design an weather app using android architecture components?
Ans. 
Design a weather app using Android architecture components.
• Use MVVM architecture pattern for separation of concerns

• Implement LiveData for real-time data updates

• Utilize Room database for offline data storage

• Integrate Retrofit for network calls to fetch weather data

• Use ViewModel to manage UI-related data in a lifecycle-conscious way
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Q1. Discussion on projects done
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Q1. Embedded c, pointers and others
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Q2. Sw process, documentation etc
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