D&K Technologies Web Developer Interview Questions and Answers

Medium level aptitude test

I was not shortlisted for this round

Q1. Data binding techniques
Ans. 
Data binding techniques allow for synchronization of data between the model and the view in web development.
• Two-way data binding ensures that changes in the model are reflected in the view and vice versa

• One-way data binding updates the view when the model changes, but not the other way around

• Data binding libraries like AngularJS, React, and Vue.js provide tools for efficient data binding
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Q2. Project related information
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Q1. Tell about a time where you had competing demands from stakeholders.
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Q1. Diff btwn this and arrow in javascript
Ans. 
The 'this' keyword in JavaScript refers to the current object, while the arrow function does not bind its own 'this'.
• The 'this' keyword in JavaScript refers to the object that is executing the current function.

• Arrow functions do not bind their own 'this' value, instead they inherit the 'this' value from the enclosing lexical context.

• Using 'this' in a regular function can lead to unexpected behavior, especially in neste...read more
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Q2. Diff btwn let, var, const
Ans. 
let, var, and const are all used to declare variables in JavaScript, but they have different scopes and behaviors.
• let is block-scoped and can be reassigned, var is function-scoped and can be reassigned, const is block-scoped and cannot be reassigned

• Using let:

• let x = 10;

• x = 20; // valid

• Using var:

• var y = 5;

• y = 8; // valid

• Using const:

• const z = 15;

• z = 25; // error, cannot reassign const variable
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Q1. Why use php ?
Ans. 
PHP is a popular server-side scripting language used for web development.
• PHP is easy to learn and use for web development.

• PHP has a large community and extensive documentation for support.

• PHP is compatible with various operating systems and web servers.

• PHP can be embedded directly into HTML code for dynamic web pages.

• PHP can interact with databases like MySQL to create dynamic content.
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Q2. Php popular framewrk?.
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Q1. Small UI task using Vue.js
Ans. 
Create a small UI task using Vue.js
• Create a simple form with input fields and a submit button

• Use Vue.js directives like v-model for data binding

• Implement validation for the form fields

• Display a success message upon form submission
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Q2. Find the second largest number
Ans. 
Iterate through the array to find the second largest number
• Iterate through the array and keep track of the largest and second largest numbers

• Compare each element with the largest and second largest numbers to update them accordingly

• Return the second largest number once the iteration is complete
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Q1. Basic Javascript questions. Object, Arrow function.
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Medium level aptitude test

I was not shortlisted for this round