HCLTech Senior Software Engineer 2 Interview Questions and Answers

Login components in Angular handle user authentication and authorization.

• Use Angular's built-in forms module to create login form

• Implement authentication service to handle login logic

• Use Angular router to navigate to different pages based on login status

Abstract is a concept or idea that is not concrete or tangible.

• Abstract classes in programming are classes that cannot be instantiated and are meant to be inherited by other classes.

• Abstract data types are data types defined by their behavior and operations, rather than their implementation.

• Abstract art is art that does not attempt to represent an accurate depiction of visual reality.

Microservices architecture using Docker containers and Kubernetes for scalability and flexibility.

• Utilizes microservices architecture for modularity and scalability

• Docker containers used for easy deployment and management

• Kubernetes for orchestration and scaling of containers

Event loop is a mechanism in JavaScript that allows for asynchronous programming by handling and executing tasks in a non-blocking manner.

• Event loop is responsible for managing the execution of code in JavaScript.

• It continuously checks for tasks in the event queue and executes them one by one.

• Tasks can be added to the event queue through various mechanisms like timers, user interactions, or network requests.

• The event l...read more

let, const, and var are JavaScript keywords used to declare variables, but they have different scoping and reassignment rules.

• let and const are block-scoped, while var is function-scoped.

• let and var allow variable reassignment, while const does not.

• let and const are hoisted to the top of their block, but not initialized, while var is hoisted and initialized with undefined.

• let and const are part of the ES6 (ECMAScript 2...read more

bind is a method in JavaScript used to create a new function with a specified 'this' value and initial arguments.

• bind() returns a new function with the specified 'this' value and arguments.

• The original function is not called immediately when bind() is used.

• bind() can be used to partially apply arguments to a function.

• The bound function can be called with additional arguments.

• The 'this' value inside the bound function w...read more

JavaScript Promises are objects that represent the eventual completion or failure of an asynchronous operation.

• A Promise can be in one of three states: pending, fulfilled, or rejected.

• You create a Promise using the 'new Promise' constructor: const myPromise = new Promise((resolve, reject) => { ... });

• Use '.then()' to handle fulfilled promises: myPromise.then(result => { console.log(result); });

• Use '.catch()' to h...read more

Program to swap two numbers without using temp variables

• Use arithmetic operations to swap the values

• Add the two numbers and store the result in the first variable

• Subtract the second variable from the result and store it in the second variable

Pseudo code to sort a random list of numbers in ascending order

• Loop through the list and compare adjacent elements

• If the left element is greater than the right element, swap them

• Repeat until no swaps are needed

Stacks and heaps are data structures used to store and manage memory. Sorting techniques are algorithms used to sort data.

• Stacks are a LIFO (last in, first out) data structure. Examples include the call stack in programming and undo/redo functionality in text editors.

• Heaps are a dynamic memory allocation technique. Examples include the heap memory in programming and the memory allocation in operating systems.

• Sorting te...read more

To write a procedure in PL/1, use the PROC statement followed by the procedure name and the necessary code.

• Begin with the PROC statement followed by the procedure name

• Add the necessary code within the procedure

• End the procedure with the END statement

• Example: PROC MYPROC; /* code here */ END MYPROC;

I have worked on various projects involving web development, data analysis, and machine learning.

• Developed a web application using React.js and Node.js for a client in the e-commerce industry.

• Implemented a data analysis pipeline using Python and SQL to extract insights from large datasets.

• Built a machine learning model using TensorFlow to predict customer churn for a telecom company.

• Collaborated with a team to develop ...read more

I faced challenges in my projects and successfully resolved them.

• One challenge I faced was a tight deadline for a project. I handled it by prioritizing tasks, delegating work, and working extra hours to meet the deadline.

• Another challenge was a technical issue that caused frequent crashes in the software. I resolved it by thoroughly debugging the code, identifying the root cause, and implementing a fix.

• I also faced a c...read more