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3DPLM Software Solutions Software Developer Interview Questions and Answers

Updated 5 Feb 2024

Q1. Given 9 identical coins what number of minimum comparisons between them will be required to determine one of the heavier coin

Ans.

Minimum number of comparisons required to determine one of the heavier coin among 9 identical coins.

  • Divide the coins into groups of 3.

  • Weigh any two groups against each other.

  • If they are equal, the heavier coin is in the third group.

  • If one group is heavier, weigh two coins from that group against each other.

  • If they are equal, the heavier coin is the remaining one.

  • If one coin is heavier, that is the answer.

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Q2. if i am having sorted array and then i am inserting a new element into the array so which algorithm should be used to minimize time complexity

Ans.

Binary search algorithm should be used to minimize time complexity.

  • Binary search algorithm has a time complexity of O(log n).

  • It is efficient for searching in a sorted array.

  • The algorithm works by repeatedly dividing the search interval in half.

  • Example: If the array is [1, 3, 5, 7, 9] and we want to insert 6, we can use binary search to find the index where 6 should be inserted.

  • Once we find the index, we can shift the elements to the right and insert the new element.

  • This will ...read more

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Q3. make a program for this where input was no. of coins and output is no. of comparisons required.

Ans.

Program to calculate no. of comparisons required based on no. of coins input.

  • Create a function that takes the input of no. of coins

  • Use a loop to compare each coin with every other coin

  • Increment the comparison count for each comparison made

  • Return the total comparison count

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Q4. what according to you is growth?

Ans.

Growth is the process of developing and improving oneself or something over time.

  • Growth involves continuous learning and development

  • It can be personal, professional, or organizational

  • It requires setting goals and working towards them

  • Examples include learning new skills, expanding one's network, and increasing revenue

  • Growth is essential for success and fulfillment

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Q5. Tell different type is SQL joins?

Ans.

SQL joins are used to combine data from two or more tables based on a related column between them.

  • Inner join: returns only the matching rows from both tables

  • Left join: returns all the rows from the left table and matching rows from the right table

  • Right join: returns all the rows from the right table and matching rows from the left table

  • Full outer join: returns all the rows from both tables, with NULL values in the columns where there is no match

  • Cross join: returns the Cartesi...read more

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Q6. why 3DPLM?

Ans.

3DPLM is a leading software development company with a strong focus on innovation and growth.

  • 3DPLM offers exciting opportunities to work on cutting-edge technologies and projects.

  • The company has a great work culture and provides ample learning and development opportunities.

  • 3DPLM has a strong reputation in the industry and is known for delivering high-quality software solutions.

  • Working at 3DPLM provides exposure to a diverse range of clients and industries.

  • The company values i...read more

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Q7. Explain SDLC?

Ans.

SDLC stands for Software Development Life Cycle. It is a process used to design, develop, and test software applications.

  • SDLC is a structured approach to software development.

  • It consists of several phases including requirements gathering, design, coding, testing, and maintenance.

  • Each phase has specific deliverables and activities.

  • SDLC models include Waterfall, Agile, and DevOps.

  • Example: In the requirements gathering phase, the software developer works with stakeholders to und...read more

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Q8. Explain oops concept.

Ans.

OOPs is a programming paradigm based on the concept of objects that interact with each other.

  • OOPs stands for Object-Oriented Programming.

  • It focuses on creating objects that have properties and methods.

  • Encapsulation, Inheritance, and Polymorphism are the three main pillars of OOPs.

  • Encapsulation is the process of hiding the implementation details of an object.

  • Inheritance allows a new class to be based on an existing class.

  • Polymorphism allows objects of different classes to be t...read more

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