MAS Payments Senior HR Lead Interview Questions and Answers

Q1. Tell us about your past project architecture
Ans. 
I have designed and implemented a microservices architecture for a large e-commerce platform.
• Utilized Docker containers for easy deployment and scalability

• Implemented API gateway for centralized authentication and routing

• Used message queues for asynchronous communication between services
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Q1. Past job experience
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Q2. Basic banking operations
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Q1. 1.Tell me about your Self ,2.What metrics you track for customer satisfaction,3.Describe your day to day work
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Its a easy aptitude and Numerical but the professional aptitude test is quite tricky and needs your utmost attention

Q1. Its a thematic and situational questiona
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Q2. What is career progression
Ans. 
Career progression is the process of advancing in one's career through promotions, skill development, and increased responsibilities.
• Career progression involves setting goals and working towards them

• It requires continuous learning and development of new skills

• It may involve taking on new responsibilities or roles within an organization

• Examples of career progression include moving from an entry-level position to a manag...read more
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Q3. Explain your internships and roles handled there
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I completed internships at XYZ Corp and ABC Inc, where I worked in HR and marketing roles respectively.
• At XYZ Corp, I assisted with recruitment, onboarding, and employee engagement initiatives.

• At ABC Inc, I helped with social media marketing campaigns, content creation, and event planning.

• Both internships provided me with valuable hands-on experience and helped me develop a range of skills.

• I learned how to work effecti...read more
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Q1. What and why IOC Container in spring
Ans. 
IOC Container is a core feature of Spring Framework that manages the dependencies between objects.
• IOC stands for Inversion of Control

• It is used to achieve loose coupling between objects

• It allows objects to be created and wired together by an external framework

• It reduces the amount of code needed for configuration and maintenance

• Examples of IOC Containers in Spring are ApplicationContext and BeanFactory
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Q2. Why we use @Value in spring boot
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We use @Value in Spring Boot to inject values from properties files or environment variables.
• Allows for external configuration of application properties

• Values can be injected from properties files or environment variables

• Can be used to inject values into fields, constructors, or methods

• Example: @Value("${my.property}") private String myProperty;
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Q3. Difference between SQL and Non-SQL database
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SQL databases are relational and use structured data, while NoSQL databases are non-relational and use unstructured data.
• SQL databases use tables with predefined schema, while NoSQL databases use documents, key-value pairs, or graphs.

• SQL databases are better for complex queries and data analysis, while NoSQL databases are better for scalability and flexibility.

• Examples of SQL databases include MySQL, Oracle, and Postgr...read more
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Q4. Give real time scenario where have you used abstract class and interface
Ans. 
Abstract classes and interfaces are used to achieve abstraction and provide a blueprint for classes to implement.
• Used abstract class to create a base class for different types of vehicles, with common properties and methods.

• Used interface to define a contract for different payment methods, with each method implementing its own logic.

• Abstract classes are used when we want to provide a default implementation for some met...read more
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Q5. How did you handle authentication and authorization in project
Ans. 
Authentication and authorization were handled using a combination of technologies and protocols.
• Used OAuth 2.0 for authentication

• Implemented role-based access control for authorization

• Stored user credentials securely using bcrypt hashing algorithm

• Used JSON Web Tokens (JWT) for session management

• Implemented two-factor authentication for sensitive operations
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Q6. How will you encrypt customer information including SSN and others
Ans. 
Customer information will be encrypted using industry-standard encryption algorithms and stored securely.
• Use industry-standard encryption algorithms such as AES or RSA

• Ensure that encryption keys are securely stored and managed

• Implement secure storage mechanisms such as hashing and salting

• Regularly review and update encryption protocols to ensure they remain secure
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Q7. Why Serialization used
Ans. 
Serialization is used to convert complex data structures into a format that can be easily transmitted or stored.
• Serialization allows data to be sent over a network or saved to a file.

• It enables objects to be stored in a database or memory.

• Serialization is used in web services, messaging systems, and distributed computing.

• Examples include JSON, XML, and binary formats like Protocol Buffers and Apache Avro.
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Q8. Do you have any experience with Jenkins and Cloud Deployement
Ans. 
Yes, I have experience with Jenkins and Cloud Deployment.
• I have used Jenkins for continuous integration and continuous deployment.

• I have experience with setting up Jenkins pipelines for automated deployment.

• I have worked with cloud platforms like AWS and Azure for deploying applications.

• I have used tools like Ansible and Terraform for infrastructure automation.

• I have experience with containerization using Docker and Ku...read more
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Q9. Have you used Logging mechanism
Ans. 
Yes, logging is an essential part of software development.
• Logging helps in debugging and troubleshooting issues.

• It provides a record of events and actions taken by the system.

• It helps in monitoring system performance and identifying bottlenecks.

• Examples of logging mechanisms include log4j, syslog, and ELK stack.
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Q1. What is spark increment data load
Ans. 
Spark increment data load is a process of loading only the new or updated data into an existing dataset.
• It helps in reducing the processing time and resources required for loading the entire dataset.

• It involves identifying the changes in the source data and only loading those changes into the target dataset.

• Spark provides various APIs and tools to perform incremental data loading such as Delta Lake and Structured Strea...read more
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Q2. What are the spark configurations
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Spark configurations are settings that determine how Spark applications run on a cluster.
• Spark configurations can be set using command-line arguments, properties files, or programmatically in code.

• Configurations can control various aspects of Spark, such as memory usage, parallelism, and logging.

• Examples of Spark configurations include spark.executor.memory, spark.driver.cores, and spark.eventLog.enabled.
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Q3. What is broadcast join
Ans. 
Broadcast join is a type of join operation in distributed computing where a small table is broadcasted to all nodes for joining with a larger table.
• Broadcast join is used in distributed computing to optimize join operations.

• It involves broadcasting a small table to all nodes in a cluster.

• The small table is then joined with a larger table on each node.

• This reduces the amount of data that needs to be shuffled across the ...read more
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Q4. What is catalyst optimizer
Ans. 
Catalyst optimizer is a tool used in computer programming to improve the performance of code by optimizing the execution process.
• It is used in programming languages like Python, Scala, and Spark.

• It analyzes the code and makes changes to improve its efficiency.

• It can improve the speed of code execution and reduce memory usage.

• Examples include PySpark's Catalyst optimizer and Scala's Catalyst optimizer.
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Q5. What is tungsten project in spark
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Tungsten is a project in Spark that provides a high-level API for distributed data processing.
• Tungsten optimizes Spark's execution engine by using memory management and binary processing.

• It improves performance by reducing garbage collection overhead and CPU usage.

• Tungsten also provides a new columnar storage format called Catalyst that improves query performance.

• Example: Tungsten can be used to process large datasets ...read more
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Q6. What is serialization in spark
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Serialization is the process of converting data into a format that can be stored or transmitted.
• In Spark, serialization is used to convert data into a format that can be sent over the network or stored in memory.

• Spark supports two types of serialization: Java serialization and Kryo serialization.

• Kryo serialization is faster and more efficient than Java serialization.

• Serialization is important in Spark because it allows...read more
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Q7. How to convert unstructured data to structure data
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Unstructured data can be converted to structured data by using techniques such as data mining, natural language processing, and machine learning.
• Identify the relevant data points and attributes

• Use data mining techniques to extract patterns and relationships

• Apply natural language processing to extract meaning from text

• Use machine learning algorithms to classify and categorize data

• Transform the data into a structured for
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Q8. Write a spark submit command
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Spark submit command to run a Scala application on a cluster
• Include the path to the application jar file

• Specify the main class of the application

• Provide any necessary arguments or options

• Specify the cluster manager and the number of executors

• Example: spark-submit --class com.example.Main --master yarn --num-executors 4 /path/to/application.jar arg1 arg2
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Q9. Write a program to reverse a string
Ans. 
A program to reverse a string
• Create an empty string to store the reversed string

• Loop through the original string from the end to the beginning

• Add each character to the new string

• Return the new string
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Q10. How to read file name in spark
Ans. 
To read file name in Spark, use the 'input_file_name' function.
• Use 'input_file_name' function in Spark to read file name.

• This function returns the name of the file being processed.

• Example: df.select(input_file_name().alias('filename')).show()

• This will show the file name in a new column named 'filename'.
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Lead team

Q1. Tell me about your self
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Q2. My name is Karanveer
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Q1. Tell me about your hobby
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Q2. My hobby is reading motivation people success story and listen Bhagvat Geeta
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