GrapplTech Front end Developer Interview Questions and Answers

Q1. What are grids in CSS and how are they used?
Ans. 
CSS grids are a layout system that allows for responsive design using rows and columns.
• CSS Grid Layout is a two-dimensional layout system, enabling control over both rows and columns.

• It uses a grid container to define the grid structure with properties like 'display: grid'.

• Items within the grid can be placed precisely using grid lines, areas, and cells.

• Example: To create a simple grid, use 'grid-template-columns: repea...read more
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Q2. What is the Flexbox layout in CSS, and how does it work?
Ans. 
Flexbox is a CSS layout model that allows for responsive design by distributing space along a single axis.
• Flexbox stands for 'Flexible Box' and is designed for one-dimensional layouts.

• It uses properties like 'display: flex;' to create a flex container.

• Items within the container can be aligned and distributed using properties like 'justify-content' and 'align-items'.

• Example: 'justify-content: center;' centers items hori...read more
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Q3. What does responsive design mean in the context of web development?
Ans. 
Responsive design ensures web applications adapt seamlessly to various screen sizes and devices for optimal user experience.
• Fluid grids: Layouts that use percentage-based widths instead of fixed pixels, allowing elements to resize based on the screen size.

• Media queries: CSS techniques that apply different styles based on device characteristics, such as width, height, or orientation.

• Flexible images: Images that scale wi...read more
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Q4. How would you develop a model component and apply CSS for styling it?
Ans. 
Developing a modal component involves creating a reusable UI element with HTML, CSS, and JavaScript for interactivity.
• 1. Create the HTML structure: Use a <div> for the modal with a header, body, and footer.

• Example: <div class='modal'><div class='modal-header'>...</div><div class='modal-body'>...</div><div class='modal-footer'>...</div></div>

• 2. Style the modal with C...read more
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Q5. What are the features of ES6 in JavaScript?
Ans. 
ES6 introduced significant improvements to JavaScript, enhancing syntax and functionality for developers.
• Arrow Functions: Shorter syntax for function expressions. Example: const add = (a, b) => a + b;

• Template Literals: Multi-line strings and string interpolation. Example: const greeting = `Hello, ${name}!`;

• Destructuring Assignment: Unpacking values from arrays or properties from objects. Example: const [x, y] = [1, ...read more
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Q6. What is the code for adding elements to an array?
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Adding elements to an array can be done using methods like push, unshift, and splice in JavaScript.
• 1. Using push(): Adds one or more elements to the end of an array. Example: let fruits = ['apple', 'banana']; fruits.push('orange'); // ['apple', 'banana', 'orange']

• 2. Using unshift(): Adds one or more elements to the beginning of an array. Example: let fruits = ['apple', 'banana']; fruits.unshift('orange'); // ['or...read more
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