Operative Media Principal Software Engineer Interview Questions and Answers

Q1. Resume, coding questions
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Q2. Ds algo css questions based on time and space complexity
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Q1. Tell me about yourself, js input output questions
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Q2. System design, load balancer working
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Q1. Javascript basic question asked like closure hoisting some output based question
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Q1. React app optimization and advanced hooks
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Q1. Debounce Time implement
Ans. 
Debounce time is a programming technique to limit the rate at which a function is executed.
• Debouncing prevents a function from being called multiple times in quick succession.

• Commonly used in event handling, like button clicks or window resizing.

• Example: A search input that triggers an API call only after the user stops typing for a specified time.

• Implementation can be done using setTimeout in JavaScript.

• Debounce time ...read more
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Q2. Accordian Implement
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Q1. Reverse the linked list
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Q2. How to sort an list of an object
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Sorting a list of objects involves defining a key and using sorting algorithms to arrange them based on that key.
• Use built-in sorting functions like `sort()` in Python or `Arrays.sort()` in Java.

• Define a key function to specify the attribute to sort by, e.g., `list.sort(key=lambda x: x.name)`.

• For descending order, use `reverse=True` in Python or `Collections.reverseOrder()` in Java.

• Example in Java: `Arrays.sort(objects...read more
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Q3. How would you write code that will go on production?
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Writing production code involves best practices, testing, and deployment strategies to ensure reliability and maintainability.
• Follow coding standards and guidelines to maintain consistency.

• Implement thorough unit tests to validate functionality (e.g., using JUnit for Java).

• Conduct code reviews with peers to catch potential issues early.

• Use version control systems like Git for tracking changes and collaboration.

• Automate...read more
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Q1. What is the difference between the '==' operator and the 'equals()' method in Java?
Ans. 
The '==' operator checks reference equality, while 'equals()' checks value equality in Java.
• '==' compares memory addresses of objects.

• 'equals()' compares the actual content of objects.

• Example: String s1 = new String('test'); String s2 = new String('test'); s1 == s2 // false, s1.equals(s2) // true

• For primitive types, '==' compares values directly.

• For objects, '==' checks if both references point to the same object.
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Q2. Question related to java and dsa.
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Q1. React Hooks , Virtual Dom , and other some basic ReactJS questions .
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Q2. JavaScript ES6 questions and some basic logical Coding questions .
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Q1. JavaScript advance questions such as - Promise , Async awit
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Q2. Logical Coding question and Events.
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Q3. OOPs Concepts and Functions.
Ans. 
OOPs Concepts focus on encapsulation, inheritance, polymorphism, and abstraction. Functions are reusable blocks of code.
• OOPs Concepts include encapsulation, inheritance, polymorphism, and abstraction.

• Encapsulation involves bundling data and methods that operate on the data into a single unit.

• Inheritance allows a class to inherit properties and behavior from another class.

• Polymorphism enables objects to be treated as in...read more
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Q4. High order Component , Call back functions
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Was asked a React coding question to fetch data using an API and show it on UI, for a frontend developer role.

Q1. Was asked basic theoretical questions on React.
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Q2. Was asked output problems in JavaScript.
Ans. 
JavaScript output problems often arise from type coercion, scoping issues, and asynchronous behavior.
• Type Coercion: '5' + 5 results in '55' due to string concatenation.

• Variable Hoisting: console.log(x); var x = 10; outputs 'undefined'.

• Asynchronous Behavior: setTimeout(() => console.log('Hello'), 0); outputs 'Hello' after the current execution context.
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Q1. Questions were asked on design patterns.
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Q2. Questions were asked to test basic understanding of how backend works.
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Q1. Asked Spring Boot and java
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Q2. Database question in deth
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