Infosys Senior Software Engineer Interview Questions, Process, and Tips

Q1. Two sum of an array
Ans. 
Find two numbers in an array that add up to a specific target value.
• Use a hashmap to store the difference between the target value and each element in the array.

• Iterate through the array and check if the current element's complement exists in the hashmap.

• Return the indices of the two numbers that add up to the target value.
Answered by AI
Add your answer
Q2. Print the given pattern
Ans. 
Print a given pattern using array of strings
• Use nested loops to iterate through rows and columns

• Build the pattern by adding characters based on the row and column indices

• Example: For a pattern like '12345', the first row would be '1', second row '12', and so on
Answered by AI
Add your answer

Q1. Self intro and others
Add your answer
Q2. Project related questions and more
Add your answer

Q1. Difference between JVM ,JRE and JDK
Ans. 
JVM is the Java Virtual Machine that executes Java bytecode. JRE is the Java Runtime Environment that includes JVM and libraries. JDK is the Java Development Kit that includes JRE and development tools.
• JVM is responsible for running Java programs by interpreting bytecode.

• JRE includes JVM along with libraries and other components needed to run Java applications.

• JDK is a full-featured development kit that includes JRE, d...read more
Answered by AI
Add your answer
Q2. What is @springbootapplication annotation.
Ans. 
Annotation used to mark a class as a Spring Boot application.
• Used to indicate the main class of a Spring Boot application

• Enables auto-configuration and component scanning

• Can be used with additional annotations like @SpringBootApplication
Answered by AI
Add your answer

Q1. Core Java related Question with Multithreading
Add your answer
Q2. Deep Discussion on Projects.
Add your answer

Q1. What is Stream ?
Ans. 
A stream is a sequence of data elements made available over time.
• Streams are used for processing large amounts of data efficiently.

• They can be infinite or finite in nature.

• Examples include reading data from a file or network, or generating data dynamically.
Answered by AI
Add your answer
Q2. How to use kafka
Ans. 
Kafka is a distributed streaming platform used for building real-time data pipelines and streaming applications.
• Kafka uses topics to organize and store data streams.

• Producers publish messages to topics.

• Consumers subscribe to topics to read messages.

• ZooKeeper is used for managing Kafka brokers and maintaining metadata.

• Kafka Connect is used for integrating Kafka with external systems.

• Kafka Streams API allows for building...read more
Answered by AI
Add your answer
Q3. How to call from one upstream to several downstream
Ans. 
Use a publish-subscribe pattern to call from one upstream to several downstream
• Implement a publish-subscribe pattern where the upstream component publishes events and the downstream components subscribe to those events

• Use a message broker or event bus to facilitate communication between the upstream and downstream components

• Ensure that the events published by the upstream component are received by all the subscribed do
Answered by AI
Add your answer

Q1. Walrus operator
Add your answer
Q2. Etl scenario questions
Add your answer

One online java test

Java spring boot coding