Cigniti Technologies Lead Interview Questions and Answers

Q1. Basic java questions 1 coding then scenario based questions
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Q2. System design question
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Q1. Print greater number using lambda function
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Use lambda function to print greater number
• Define a lambda function that takes two parameters

• Use the max() function inside the lambda to compare the two numbers

• Call the lambda function with two numbers to print the greater one
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Q2. Explain OOPs concepts
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OOPs concepts refer to Object-Oriented Programming principles like inheritance, encapsulation, polymorphism, and abstraction.
• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementation detail...read more
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Q3. All major C++ topics were covered
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Q1. Singleton design pattern
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Q2. Code for Fibonacci series -- both iterative and recursive
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Fibonacci series code in iterative and recursive methods
• Iterative method: Use a loop to calculate Fibonacci numbers

• Recursive method: Define a function that calls itself to calculate Fibonacci numbers

• Example for iterative method: int fib(int n) { int a = 0, b = 1, c; for(int i = 2; i <= n; i++) { c = a + b; a = b; b = c; } return b; }

• Example for recursive method: int fib(int n) { if(n <= 1) return n; return fib(n-1) + f...read more
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Q1. Print 1-10 using 2 threads, in correct order
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Use two threads to print numbers 1-10 in correct order
• Create two threads, one for printing odd numbers and one for printing even numbers

• Use synchronization mechanisms like mutex or semaphore to ensure correct order

• Example: Thread 1 prints 1, 3, 5, 7, 9 and Thread 2 prints 2, 4, 6, 8, 10
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Q2. How to do Unit testing in C++
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Unit testing in C++ involves writing test cases for individual units of code to ensure they work as expected.
• Use a unit testing framework like Google Test or Catch2 to write and run test cases

• Create separate test files for each unit of code being tested

• Use assertions to check the expected behavior of the code under test

• Mock dependencies or use dependency injection to isolate units for testing

• Run tests regularly to catc...read more
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Q1. Touches all areas like db, language , architecture, design pattens ,Data structure, Microservices ,
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Q2. Mostly question from strings and arrays and data structure
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Q1. What is the Microservice Design Pattern? Spring Boot, Kafka, DI IC
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Microservice Design Pattern structures applications as a collection of loosely coupled services, enhancing scalability and maintainability.
• Microservices are independently deployable services that communicate over a network.

• Each microservice focuses on a specific business capability, e.g., user management or payment processing.

• Spring Boot simplifies the development of microservices with embedded servers and auto-configu...read more
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Q2. REST Api, PUB SUB
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Q1. What is authentication in API requests
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Authentication in API requests is the process of verifying the identity of the user or application making the request.
• Authentication ensures that only authorized users or applications can access the API resources.

• API requests are authenticated using tokens, API keys, or other credentials.

• Authentication can be implemented using various protocols such as OAuth, JWT, or Basic Authentication.

• Authentication is important for...read more
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Q2. What are different datatypes in python
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Python has several built-in datatypes including numeric, sequence, and mapping types.
• Numeric types include integers, floats, and complex numbers.

• Sequence types include lists, tuples, and range objects.

• Mapping types include dictionaries.

• Other datatypes include boolean, bytes, and sets.
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Q3. What is generator and decorator
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Generator is a function that returns an iterator. Decorator is a function that takes another function and extends its behavior.
• Generator functions use the yield keyword to return values one at a time.

• Decorators are used to modify the behavior of a function without changing its source code.

• Decorators can be stacked on top of each other to create complex behavior.

• Example of generator: function* myGenerator() { yield 1; y...read more
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Q1. Technical questions on the technology
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Q2. SDLC and STLC and defect life cycle
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Q3. Write test cases for ATM
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Test cases for ATM
• Verify if the ATM is dispensing the correct amount of cash

• Check if the ATM is accepting valid cards and rejecting invalid ones

• Test if the ATM is able to handle multiple transactions in a row

• Ensure that the ATM is properly secured and user data is protected
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Q1. About SQL queries
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Q2. Communication related questions to analyse the fluency
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It's a general coding test totaly technical basicaly it is for test you core knoledge.

Q1. It's technical round appart of the coding round to check the other part of coding.
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Q1. It is also a technical round but it is knowledge base round why they want from you.
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Q1. Finally it's mangerial round, and salary discussion.
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