GSPANN Technologies Technical Lead Interview Questions and Answers

Q1. Basic Java questions and deep multithreading and collections questions
Add your answer

Q1. SCD, PDL Conduct>IT Basic partitioning scenarios
Add your answer

Q1. Mostly Client round , technical questions
Add your answer

Q1. Salary discussion and basic details
Add your answer

Coding test on Angular to test the basic concepts

Q1. Difference between promise vs observables?
Ans. 
Promises are used for a single async operation while observables are used for multiple async operations and can be cancelled.
• Promises are eager, meaning they start immediately upon creation.

• Observables are lazy, meaning they only start when subscribed to.

• Promises can only handle a single value or error, while observables can handle multiple values over time.

• Observables can be cancelled, while promises cannot.

• Promises a...read more
Answered by AI
Add your answer
Q2. What is call stack and event loop in JavaScript?
Ans. 
Call stack is a data structure that stores function calls in JavaScript, while event loop manages asynchronous operations.
• Call stack is a mechanism for managing function invocation in JavaScript.

• Functions are added to the call stack when they are invoked and removed when they are completed.

• Event loop is responsible for handling asynchronous operations in JavaScript.

• Event loop continuously checks the call stack and the ...read more
Answered by AI
Add your answer

Q1. Why do you want to join IRIS?
Add your answer

Q1. Print greater number using lambda function
Ans. 
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
Answered by AI
View 1 more answer
Q2. Explain OOPs concepts
Ans. 
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
Answered by AI
View 1 more answer
Q3. All major C++ topics were covered
Add your answer

Q1. Singleton design pattern
Add your answer
Q2. Code for Fibonacci series -- both iterative and recursive
Ans. 
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
Answered by AI
Add your answer

Q1. Print 1-10 using 2 threads, in correct order
Ans. 
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
Answered by AI
View 1 more answer
Q2. How to do Unit testing in C++
Ans. 
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
Answered by AI
Add your answer

Q1. How Transaction propagation works in Hibernate?
Ans. 
Transaction propagation in Hibernate allows the management of multiple database operations within a single transaction.
• Hibernate supports different transaction propagation modes such as REQUIRED, REQUIRES_NEW, SUPPORTS, MANDATORY, NOT_SUPPORTED, and NEVER.

• The propagation mode determines how the transaction should be handled when a method is called within an existing transaction.

• REQUIRED is the default propagation mode,...read more
Answered by AI
Add your answer

Q1. Describe Spring MVC.
Ans. 
Spring MVC is a framework for building web applications in Java.
• Spring MVC is a part of the Spring Framework, which provides a model-view-controller architecture for developing web applications.

• It follows the MVC design pattern, where the model represents the data, the view represents the user interface, and the controller handles the requests and manages the flow of data.

• It provides features like request mapping, data...read more
Answered by AI
Add your answer