Convergent Science Software Engineer2 Interview Questions and Answers

Q1. Daemon thread in java
Ans. 
Daemon thread is a low priority thread that runs in the background and does not prevent the JVM from exiting.
• Daemon threads are used for tasks that do not require user interaction or continuous execution.

• They are automatically terminated when all non-daemon threads have finished.

• Set a thread as daemon using setDaemon(true) method before starting it.

• Example: Thread t = new Thread(); t.setDaemon(true); t.start();
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Hackerrank was used for test

Q1. Implement BFS to find the nearest neighbour
Ans. 
Implement BFS algorithm to find the nearest neighbour
• Create a queue to store nodes to be visited

• Start with the initial node and add it to the queue

• While the queue is not empty, dequeue a node, visit its neighbours, and add them to the queue

• Repeat until the nearest neighbour is found
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Q2. Implement Priority queue using heap.
Ans. 
Priority queue can be implemented using a heap data structure.
• Create a min heap or max heap based on the priority order needed.

• Insert elements into the heap based on their priority level.

• Remove elements from the heap based on their priority level.

• Heapify the heap after each insertion or deletion operation.

• Example: Implementing a min heap for a priority queue where lower values have higher priority.
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Q1. Java Basics Technical Questions
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Q2. In depth knowledge OOPS concepts and basic practice skills of SQL operations
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Q3. In depth practice of String Manipulations using looping and conditional statements
Ans. 
String manipulation using loops and conditionals for software engineering
• Use loops to iterate through each character in the string

• Use conditional statements to check for specific conditions and manipulate the string accordingly

• Examples: reversing a string, counting occurrences of a specific character, removing whitespace
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Q4. In depth knowledge of J2ee concepts with any ORM / MVC framework skills
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Q1. Java Basics Technical Questions
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Basic aptitude questions based on profit and loss

Coding test based on c language and python programming

Communication assignment based on English

Q1. Self introduction
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Q2. Difine real time operation system
Ans. 
Real-time operating systems are designed to provide guaranteed response times for critical tasks.
• Real-time operating systems prioritize tasks based on their urgency and importance.

• They are commonly used in industries such as aerospace, automotive, and industrial automation.

• Examples include VxWorks, QNX, and FreeRTOS.
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Q1. Self introduction
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Q2. Project work questions
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Q1. Describe a a time when you had to convey your team to use a particular approach
Ans. 
I successfully convinced my team to adopt Agile methodologies for improved collaboration and efficiency in our software development process.
• Identified inefficiencies in our current waterfall approach, such as long feedback loops.

• Presented data showing how Agile could reduce development time by 30%.

• Organized a workshop to demonstrate Agile principles and practices.

• Facilitated a pilot project using Agile, which resulted ...read more
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Q2. Design a queing system
Ans. 
Design a queuing system to manage requests efficiently and ensure fair processing.
• Define the purpose: e.g., handling customer service requests.

• Choose a queuing model: FIFO (First In, First Out) is common.

• Implement priority levels: e.g., urgent requests processed first.

• Consider scalability: ensure the system can handle increased load.

• Use data structures: e.g., linked lists or arrays for queue management.

• Incorporate time...read more
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Q3. What are streams in Java
Ans. 
Streams in Java are sequences of data elements supporting sequential and parallel aggregate operations.
• Streams are part of the java.util.stream package introduced in Java 8.

• They allow functional-style operations on collections, such as map, filter, and reduce.

• Example: List<String> names = Arrays.asList("Alice", "Bob"); names.stream().filter(name -> name.startsWith("A")).forEach(System.out::println);

• Streams can...read more
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