Target Senior Software Engineer Interview Questions and Answers

Java coding test. Really basic

Q1. Immutable Class, Remove duplicates from string using java 8
Ans. 
Immutable class, remove duplicates from string using Java 8
• Create an immutable class to represent the string

• Use Java 8 streams to remove duplicates from the string

• Convert the string to a character array, use distinct() and collect() to remove duplicates
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Q2. Sealed classes in java
Ans. 
Sealed classes in Java restrict inheritance to a predefined set of subclasses.
• Sealed classes were introduced in Java 15 to restrict inheritance to a predefined set of subclasses.

• Subclasses of a sealed class must be declared in the same file as the sealed class.

• Sealed classes are declared using the 'sealed' modifier before the 'class' keyword.

• Example: sealed class Shape permits Circle, Square, Triangle;
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Q1. Fallout Mechanism between the microservices
Ans. 
Fallout mechanism between microservices refers to how failures in one microservice can impact other microservices.
• Fallout can occur due to cascading failures when one microservice depends on another.

• Implementing circuit breakers can help prevent fallout by isolating failures.

• Monitoring and alerting systems are crucial for detecting and responding to fallout.

• Using asynchronous communication can reduce the impact of fall...read more
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Two DSA ques were asked. One easy and one medium.

Q1. Project discussion and some DSA ques
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Q1. Standard hr question
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Q1. Internals of hashset
Ans. 
HashSet is a collection that stores unique elements using a hash table.
• Uses hashing to store elements

• Does not allow duplicate elements

• Provides constant-time performance for basic operations like add, remove, contains
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Q2. Deques based questions
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Q1. Projects discussion from beginning
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Q2. How do you resolve conflicts?
Ans. 
I resolve conflicts by actively listening, understanding all perspectives, finding common ground, and proposing solutions.
• Actively listen to all parties involved

• Understand each perspective and the underlying reasons for conflict

• Find common ground and areas of agreement

• Propose solutions that address the concerns of all parties
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There were 2 coding questions and mcqs

Q1. Data structures and algorithms
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Q2. Questions about tools used in projects
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Q1. Basic hr questions
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Trim bst, subtraction LL

Q1. Combination sum
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Q2. Target element index in Rotated sorted array
Ans. 
Finding index of target element in a rotated sorted array.
• Use binary search to find the pivot point where the array is rotated.

• Determine which half of the array the target element lies in.

• Perform binary search on the appropriate half to find the target element index.
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Q3. Longest substring with no repeated characters
Ans. 
Find the longest substring in a given string with no repeated characters.
• Use a sliding window approach to keep track of the current substring.

• Use a hash set to keep track of the characters in the current substring.

• If a repeated character is found, move the start of the window to the next character after the first occurrence of the repeated character.

• Update the maximum length of the substring as the window slides throug
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Q4. Reverse words in a string
Ans. 
Reverse the order of words in a given string.
• Split the string into an array of words using space as a delimiter.

• Reverse the array of words.

• Join the array of words back into a string using space as a separator.
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Q1. Open for relocation
Ans. 
Yes, I am open for relocation.
• I am willing to relocate for the right opportunity

• I am open to exploring new places and cultures

• I understand that relocation may be necessary for career growth
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1. 20 MCQ question based in java ,SQL , network ,os
2 DSA questions
1. Subtract two Linked list
2 . Trim Binary Tree

Q1. 1 If frequently insertion and deletion happen which data structure you choose and why?
Ans. 
I would choose a linked list as it allows for efficient insertion and deletion operations.
• Linked lists have constant time complexity for insertion and deletion operations

• Arrays have a linear time complexity for these operations

• Examples of linked list applications include implementing stacks and queues

• Arrays are better suited for random access and searching
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Q2. 2. How you connect Kafka to spring boot project 3. How Microservices Communicate with eachother 4. How HashMap internally work and how you resolve the collision 5. Reverse a Stack 6. Best time to buy a sto...read more
Ans. 
Technical interview questions on Kafka, Microservices, HashMap, Stack and Stock
• To connect Kafka to Spring Boot project, add Kafka dependencies in pom.xml and configure Kafka properties in application.properties

• Microservices communicate with each other through REST APIs or message brokers like Kafka or RabbitMQ

• HashMap internally uses an array of buckets to store key-value pairs. Collision is resolved by chaining or open...read more
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Q1. 1. Tell me about yourself 2. Why you want to switch 3. Salary discussion
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