TELUS Digital Front end Developer Interview Questions and Answers

Q1. Tell about yourself
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Q2. What is you strengths
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Q3. How many projects you make from sketch
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Q1. What is reactjs?
Ans. 
ReactJS is a JavaScript library for building user interfaces.
• ReactJS is developed and maintained by Facebook.

• It allows developers to create reusable UI components.

• ReactJS uses a virtual DOM for better performance.

• It follows a component-based architecture.

• ReactJS can be used to build single-page applications.
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Q2. What is call, apply and bind in javascript?
Ans. 
call, apply, and bind are methods in JavaScript used to manipulate the context of a function.
• call() is used to invoke a function with a specified 'this' value and arguments provided individually.

• apply() is similar to call() but arguments are passed as an array.

• bind() is used to create a new function with a specified 'this' value and initial arguments.
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Q3. Data Types in javascript
Ans. 
JavaScript has several data types including string, number, boolean, object, array, null, and undefined.
• String: 'hello'

• Number: 42

• Boolean: true or false

• Object: { key: value }

• Array: [1, 2, 3]

• Null: null

• Undefined: undefined
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Q1. React hooks and its usage
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React hooks are functions that let you use state and other React features without writing a class.
• Hooks are introduced in React 16.8 to allow state and lifecycle features in functional components.

• useState() hook is used to add state to functional components.

• useEffect() hook is used to perform side effects in functional components.

• Custom hooks can be created to reuse stateful logic across components.

• Hooks should always ...read more
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Q2. Virtual Dom and its use
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Virtual DOM is a lightweight copy of the actual DOM, used for efficient updates and rendering in React applications.
• Virtual DOM is a concept in React where a lightweight copy of the actual DOM is created.

• It allows React to efficiently update and render components by comparing the virtual DOM with the actual DOM and only making necessary changes.

• Virtual DOM helps in improving performance by reducing the number of direct...read more
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Q3. Redux, middleware and its use
Ans. 
Redux is a state management library for React applications. Middleware is a function that intercepts actions before they reach the reducer.
• Redux is used to manage the state of a React application in a predictable way

• Middleware in Redux allows you to write logic that can intercept and modify actions before they reach the reducer

• Common middleware in Redux includes redux-thunk for async actions and redux-logger for loggin
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Q4. Call, bind and apply and its application
Ans. 
Call, bind, and apply are methods used to manipulate the context of a function in JavaScript.
• Call - allows you to call a function with a specified 'this' value and arguments provided individually.

• Example: function greet(name) { return 'Hello ' + name; } greet.call(null, 'John');

• Bind - creates a new function that, when called, has its 'this' keyword set to the provided value.

• Example: const greetJohn = greet.bind(null, '...read more
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Q5. 1 coding question in js for flaten array
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Q6. 1 react questions of todo type questions
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Q1. Ask about my backend knowledge
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Q2. Ask about my knowledge in data analytics
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Q3. Negotiate on basis of above skills not on react
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Q1. Self introduction
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Q2. Tell something about your personal experiences
Ans. 
I have gained valuable customer service skills through my previous roles in hospitality.
• Worked in customer-facing roles in the hospitality industry

• Handled guest inquiries and resolved issues effectively

• Received positive feedback from guests for excellent service

• Trained new staff on customer service best practices
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Harvar voice assessment.

Q1. Self introduction
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Q2. Where do you see yourself in next 5 years
Ans. 
In the next 5 years, I see myself growing within the company, taking on more responsibilities, and potentially moving into a managerial role.
• Continuing to excel in my current role as a Front Office Executive

• Participating in leadership development programs to enhance my skills

• Building strong relationships with colleagues and clients to further my career

• Working towards becoming a Front Office Manager or similar position
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Q1. What is Currying
Ans. 
Currying is a technique in functional programming where a function with multiple arguments is transformed into a sequence of nested functions, each taking a single argument.
• Currying helps in creating reusable functions and partial application.

• It allows for easier composition of functions.

• Example: const add = (a) => (b) => a + b; add(2)(3) will return 5.
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Q2. What are closures
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Closures are functions that have access to their own scope, as well as the scope in which they were defined.
• Closures allow functions to access variables from their outer function even after the outer function has finished executing.

• They help in maintaining state in functional programming.

• Example: function outerFunction() { let outerVar = 'I am outer'; return function innerFunction() { console.log(outerVar); }; }

• Example...read more
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Q3. What hooks you are familiar with
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Skill verifying by department oriented questions.

Q1. About technical related
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Q2. Query about technical knowledge.
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Q1. Self introduction and mindset of candidate related questions
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Coding test was the first round of interview

Q1. What is virtual dom in react and what makes it faster ?
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Q1. It was HR round
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Q1. Tell about yourself
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Q2. What is you strengths
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Q3. How many projects you make from sketch
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