Happiest Minds Technologies Interview Questions, Process, and Tips

Q1. Tell me about your self ? Are you experienced ? What is your expectations?
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Q2. Are Implementation khfh What is the link of them What do you mean by discovery
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Q1. Core Java Spring Boot Microservices REST APIs Kafka Java Coding
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Q1. Java 8 coding SQL coding Scenario based questions on current project Design Patterns
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Q1. Past projects Tricky Java scenario based questions CI/CD experience
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Q1. Salary Negotiation
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Round duration - 30 minutes
Round difficulty - Easy

MCQ's as well some basic coding questions were there in this round

Q1. 
Cycle Detection in a Singly Linked List
Determine if a given singly linked list of integers forms a cycle or not.
A cycle in a linked list occurs when a node's next points back to a previous node in the ...read more
Ans. 
Detect if a singly linked list forms a cycle by checking if a node's next points back to a previous node.
• Traverse the linked list using two pointers, one moving one step at a time and the other moving two steps at a time.

• If the two pointers meet at any point, it indicates the presence of a cycle in the linked list.

• To optimize space complexity, use constant extra space by modifying the linked list nodes.
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Round duration - 25 minutes
Round difficulty - Easy

Questions on DBMS and OS were asked in this round

Q1. What is the difference between paging and segmentation?
Ans. 
Paging divides physical memory into fixed-size blocks, while segmentation divides logical memory into variable-size segments.
• Paging divides memory into fixed-size blocks called pages, while segmentation divides memory into variable-size segments.

• Paging allows for efficient use of physical memory by swapping pages in and out of RAM, while segmentation simplifies memory management for programs.

• Paging is more commonly use...read more
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Q2. What do you mean by FCFS (First-Come, First-Served)?
Ans. 
FCFS (First-Come, First-Served) is a scheduling algorithm where tasks are executed in the order they arrive.
• Tasks are processed based on their arrival time, with the first task arriving being the first to be executed.

• It is a non-preemptive scheduling algorithm, meaning once a task starts, it runs to completion without interruption.

• FCFS is simple to implement but may lead to longer waiting times for tasks that arrive la...read more
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Q3. What is the difference between normalization and denormalization in database management systems?
Ans. 
Normalization is the process of organizing data in a database to reduce redundancy and improve data integrity, while denormalization is the process of intentionally introducing redundancy to improve query performance.
• Normalization involves breaking down a table into smaller tables and defining relationships between them to reduce redundancy.

• Denormalization involves combining tables and duplicating data to improve query...read more
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Round duration - 15 minutes
Round difficulty - Easy

Basic HR questions like why do you want to join this company and some questions on behavioural and resume.

Q1. What is your expectation
Ans. 
I expect clear communication, defined goals, effective teamwork, and successful project completion.
• Clear communication with team members and stakeholders

• Defined project goals and milestones

• Effective teamwork and collaboration

• Successful completion of projects within budget and timeline
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Q2. What do you enjoy working
Ans. 
I enjoy working on challenging projects that require problem-solving and collaboration.
• I thrive in fast-paced environments where I can use my organizational skills to keep projects on track.

• I enjoy working with diverse teams and leveraging each team member's strengths to achieve project goals.

• I find satisfaction in seeing a project come together from start to finish, overcoming obstacles along the way.

• I appreciate the ...read more
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It was for 1 hour..
Mostly multiple choice and 2 coding questions

Q1. They asked 3 coding questions
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Q2. Reverse a string, Max number
Ans. 
Reverse a string and find the maximum number in the string.
• Iterate through the string in reverse order to reverse it.

• Use a variable to keep track of the maximum number found while iterating through the string.

• Convert each character to a number and check if it is greater than the current maximum number.
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Q1. There will be a client Technical discussion
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Q1. First round would be technical interview
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