Merkle Software Developer Interview Questions and Answers

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Q1. Points arrays oparetor
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Q1. Tell me Your self
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Q2. Why should higher you
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Noramal basic algorithm and ,fetch api

Q1. React alll basic question,redux,class component,functional component
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Q1. What is OOPS ?
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OOPS stands for Object-Oriented Programming System. It is a programming paradigm based on the concept of objects.
• OOPS focuses on creating objects that contain data and methods to manipulate that data.

• It allows for encapsulation, inheritance, and polymorphism.

• Examples of OOPS languages include Java, C++, and Python.
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Q2. What is Dependency Injection
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Dependency Injection is a design pattern where components are given their dependencies rather than creating them internally.
• Allows for easier testing by mocking dependencies

• Promotes loose coupling between components

• Improves code reusability and maintainability

• Example: Constructor injection, Setter injection
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Q1. Which Architechture does you project build by?
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Q2. What is Normalization in sql?
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Normalization in SQL is the process of organizing data in a database to reduce redundancy and improve data integrity.
• Normalization involves breaking down a table into smaller tables and defining relationships between them.

• It helps in reducing data redundancy by storing data in a structured manner.

• There are different normal forms like 1NF, 2NF, 3NF, and BCNF that define the level of normalization.

• Example: If we have a t...read more
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Q1. Tell about your self ?
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Q2. Whom do you provide your first month salary ?
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Q1. Given an array of n numbers , find the kth largest find the sum from a th largest to bth largest n can be huge
Ans. 
Find the sum of kth to bth largest numbers in a huge array efficiently.
• Sort the array in descending order to easily find the kth and bth largest numbers.

• Use a priority queue or min heap to efficiently find the kth and bth largest numbers without sorting the entire array.

• Once you have the kth and bth largest numbers, iterate through the array and sum the numbers between them.
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Q2. Mostly elasticsearch related and company work related questions
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Q1. SOLID principles
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Q2. Microservice Architecture and Kafka
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Q1. Union and union all difference
Ans. 
UNION combines the results of two or more SELECT statements, while UNION ALL includes duplicates.
• UNION removes duplicate rows, while UNION ALL retains all rows including duplicates

• UNION is slower than UNION ALL as it performs a distinct operation

• UNION requires the same number of columns in the SELECT statements, while UNION ALL does not have this restriction
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Q2. What is generic and non-generic collections

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Generic collections allow storing any type of data, while non-generic collections are type-specific.

• Generic collections can store any type of data, such as List or Dictionary.

• Non-generic collections are type-specific, like ArrayList or HashTable.

• Generic collections provide type safety and better performance compared to non-generic collections.

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