Mr Cooper Java Developer Interview Questions and Answers

Q1. What is the difference between a static function and a static variable?
Ans. 
Static function is a function that can only be accessed within the same file, while a static variable is a variable that retains its value between function calls.
• Static function is declared using the 'static' keyword before the return type, limiting its scope to the file it is defined in.

• Static variable is declared using the 'static' keyword before the variable type, retaining its value between function calls.

• Example o...read more
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Q2. What is the synchronization technique?
Ans. 
Synchronization technique is a method used to control access to shared resources in a multi-threaded environment.
• Synchronization techniques prevent race conditions and ensure data consistency

• Common synchronization techniques include locks, semaphores, and monitors

• Examples include using synchronized keyword in Java or mutex in C++
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Q1. Javascript closure
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It continues for 15 mins

Q1. Explain oop concepts
Ans. 
OOP is a programming paradigm based on the concept of objects, which can contain data in the form of fields and code in the form of procedures.
• OOP focuses on creating objects that interact with each other to solve problems.

• Encapsulation: Objects can hide their internal state and require interactions through defined interfaces.

• Inheritance: Objects can inherit attributes and methods from other objects.

• Polymorphism: Objec...read more
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Q1. Why do you want to switch
Ans. 
I want to switch to explore new technologies and challenges in a different industry.
• Interested in learning new skills and technologies

• Seeking new challenges and opportunities for growth

• Want to explore different industry perspectives
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Q2. Salry expectations
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Q1. Question on oop concepts
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Q2. Coding questions
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Q1. Given problem and asked me to solve
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Q2. Sum of array of elements without using any llop
Ans. 
Use reduce method to calculate sum of array elements without loop
• Use Array.reduce() method to sum up the array elements

• Convert array elements to numbers before summing them up

• Example: const arr = ['1', '2', '3']; const sum = arr.reduce((acc, curr) => acc + Number(curr), 0);
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Q1. Introduction to self
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Q2. Previous employment
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Q1. Previous company work related
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