Praeclarum Tech Interview Questions, Process, and Tips

Q1. Tell me difference between Let, Var, Cost and
Ans. 
Let, var, and const are used to declare variables in JavaScript, with differences in scope and mutability.
• let: block-scoped, can be reassigned

• var: function-scoped, can be reassigned

• const: block-scoped, cannot be reassigned
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Q2. What is closure
Ans. 
Closure is the combination of a function bundled together with references to its surrounding state.
• Closure allows a function to access variables from its outer scope even after the outer function has finished executing.

• It is created whenever a function is defined within another function, and the inner function has access to the outer function's variables.

• Closure helps in maintaining the state of a function and allows f
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Q1. Define let var const
Ans. 
let, var, and const are used to declare variables in JavaScript with different scoping rules.
• let: block-scoped variable, can be reassigned

• var: function-scoped variable, can be reassigned

• const: block-scoped variable, cannot be reassigned, but its properties can be modified
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Q2. Define Closure
Ans. 
Closure is a function that has access to its own scope, as well as the scope in which it was defined.
• A closure allows a function to access variables from an outer function even after the outer function has finished executing.

• Closures are commonly used in event handlers, callbacks, and in functional programming.

• Example: function outerFunction() { let outerVar = 'I am outer'; return function innerFunction() { console.log
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Q1. What is your hobbies
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Q2. What is your Strength
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Q1. What is MVC and Explain its life cycle?
Ans. 
MVC stands for Model-View-Controller, a software design pattern used for organizing code in a structured manner.
• Model represents the data and business logic of the application.

• View is responsible for displaying the data to the user.

• Controller acts as an intermediary between Model and View, handling user input and updating the Model accordingly.

• MVC life cycle involves user interacting with the View, which triggers the C...read more
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Q2. What is dotnet core?
Ans. 
Dotnet Core is a free, open-source, cross-platform framework for building modern, cloud-based, and internet-connected applications.
• Cross-platform framework for building applications

• Open-source and free to use

• Supports modern, cloud-based, and internet-connected applications
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Q1. Tell me about yourself
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Q2. What is your notice period?
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Asking javascript algorithms and other technical questions based on response

Q1. What is eventloop
Ans. 
The event loop is a mechanism in programming that allows for asynchronous execution of code by continuously checking for and handling events.
• The event loop is commonly used in JavaScript to handle asynchronous operations such as setTimeout, setInterval, and AJAX requests.

• It allows for non-blocking I/O operations, meaning that the program can continue to run other tasks while waiting for I/O operations to complete.

• The e...read more
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Q2. What is hoisting?
Ans. 
Hoisting in JavaScript is the behavior where variable and function declarations are moved to the top of their containing scope during the compilation phase.
• Variable declarations are hoisted to the top of their scope, but not their assignments.

• Function declarations are fully hoisted, meaning they can be called before they are declared.

• Hoisting can lead to unexpected behavior if not understood properly.
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Q1. What is your strength?
Ans. 
My strengths include problem-solving skills, attention to detail, and strong programming abilities.
• Strong problem-solving skills - I enjoy tackling complex issues and finding creative solutions.

• Attention to detail - I am meticulous in my work to ensure high-quality results.

• Strong programming abilities - I have expertise in multiple programming languages such as Java, Python, and C++.
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Q2. What is your main weakness?
Ans. 
My main weakness is that I tend to get too focused on details, which can sometimes slow down my progress.
• I have a tendency to get caught up in the minutiae of a project, which can lead to delays in completing tasks.

• I am working on improving my time management skills to ensure that I am able to balance attention to detail with overall project timelines.

• An example of this weakness is when I spent too much time perfecting...read more
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Q1. What is react js?
Ans. 
React JS is a JavaScript library for building user interfaces.
• React JS is developed and maintained by Facebook.

• It allows developers to create reusable UI components.

• React uses a virtual DOM for better performance.

• It follows a component-based architecture.

• React can be used for building single-page applications.
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Q2. What is node?
Ans. 
Node is a runtime environment that allows JavaScript code to be executed outside of a web browser.
• Node.js is an open-source, cross-platform JavaScript runtime environment.

• It is built on Chrome's V8 JavaScript engine.

• Node.js allows developers to run JavaScript on the server-side.

• Node.js is commonly used for building server-side applications, APIs, and microservices.
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Q1. Tell me about yourself
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Q2. Tell me about your family
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