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Oracle Financial Services Software Consultant Interview Questions and Answers

Updated 5 Feb 2024

Q1. How would you tell a complete Java beginner the difference between set, list and map?

Ans.

Set is a collection of unique elements, List is an ordered collection of elements, and Map is a collection of key-value pairs.

  • Set does not allow duplicates, e.g. a set of integers {1, 2, 3, 4, 5}

  • List maintains the order of elements, e.g. a list of names ['John', 'Mary', 'Bob']

  • Map stores key-value pairs, e.g. a map of phone numbers {'John': '123-456-7890', 'Mary': '987-654-3210'}

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Q2. How would you train a complete beginner in Java to write their first program?

Ans.

To train a beginner in Java, start with basic concepts and gradually introduce programming concepts.

  • Start with basic concepts like data types, variables, and operators

  • Introduce control structures like if-else statements and loops

  • Teach object-oriented programming concepts like classes and objects

  • Encourage practice and experimentation with simple programs

  • Provide resources like online tutorials and exercises

  • Offer guidance and feedback on their code

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Q3. Why is main method static? Can we write static public void main()?

Ans.

Main method is static because it needs to be called without creating an instance of the class.

  • Static methods can be called without creating an instance of the class

  • Main method is the entry point of the program

  • Main method must have a specific signature: public static void main(String[] args)

  • args is an array of strings that can be used to pass command line arguments to the program

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Q4. What is microservices advantages and basic architecture?

Ans.

Microservices are a software architecture approach where applications are built as a collection of small, independent services.

  • Advantages include increased scalability, flexibility, and resilience

  • Each service can be developed, deployed, and scaled independently

  • Allows for easier maintenance and updates

  • Basic architecture involves breaking down a monolithic application into smaller, self-contained services

  • Services communicate with each other through APIs

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Discover Oracle Financial Services Software interview dos and don'ts from real experiences

Q5. How would you develop a springboot application?

Ans.

To develop a Spring Boot application, follow these steps:

  • Create a new Spring Boot project using Spring Initializr

  • Define the necessary dependencies in the pom.xml file

  • Create the necessary Java classes and packages

  • Define the application properties in the application.properties file

  • Run the application using the Spring Boot Maven plugin or by running the main class

  • Test the application using a web browser or a REST client

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Q6. What is the difference between JDK, JRE and JVM?

Ans.

JDK is a development kit, JRE is a runtime environment, and JVM is a virtual machine that executes Java code.

  • JDK includes JRE and development tools

  • JRE includes JVM and necessary libraries

  • JVM interprets compiled Java code into machine code

  • JDK is needed for developing Java applications

  • JRE is needed for running Java applications

  • Multiple JVMs can run on a single machine

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Q7. Write a program to check if a number is prime or not.

Ans.

Program to check if a number is prime or not.

  • A prime number is only divisible by 1 and itself.

  • Loop through numbers from 2 to n-1 and check if n is divisible by any of them.

  • If n is divisible by any number, it is not prime.

  • If n is not divisible by any number, it is prime.

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Q8. handling data in JAVA API

Ans.

JAVA API provides various classes and methods to handle data effectively.

  • Use classes like BufferedReader, FileReader, and Scanner to read data from files.

  • Use classes like BufferedWriter, FileWriter, and PrintWriter to write data to files.

  • Use classes like ArrayList and HashMap to store and manipulate data in memory.

  • Use classes like ResultSet and PreparedStatement to interact with databases.

  • Use classes like JsonParser and JsonGenerator to handle JSON data.

  • Use classes like Ciphe...read more

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Q9. performance issues in project

Ans.

Performance issues in a project can arise due to various reasons.

  • Identify the root cause of the issue

  • Analyze the impact of the issue on the project timeline and budget

  • Implement corrective actions to resolve the issue

  • Monitor the performance regularly to avoid future issues

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Interview Process at Oracle Financial Services Software Consultant

based on 4 interviews
1 Interview rounds
Technical Round
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