Hummingbird Web Solutions Javascript Developer Interview Questions and Answers

Q1. How do you declare a variable in JavaScript?
Ans. 
Variables in JavaScript are declared using the 'var', 'let', or 'const' keywords.
• Use 'var' to declare a variable with function scope.

• Use 'let' to declare a variable with block scope.

• Use 'const' to declare a constant variable.

• Example: var x = 5; let y = 'hello'; const PI = 3.14;
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Q2. In JavaScript using, u can declare a variable using var, let or const
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Q1. Why should we hire you?
Ans. 
I have a strong background in JavaScript development and a proven track record of delivering high-quality projects.
• Extensive experience in JavaScript development

• Strong problem-solving and analytical skills

• Ability to work well in a team and collaborate effectively

• Proven track record of delivering high-quality projects

• Excellent communication and interpersonal skills
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Q1. What is Promise in JS?
Ans. 
Promise in JS is an object representing the eventual completion or failure of an asynchronous operation.
• Promises are used to handle asynchronous operations in JavaScript.

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

• Promises can be chained using .then() method to handle success and failure cases.

• Example: new Promise((resolve, reject) => { ... }).then(result => { ... }).catch(error => { ... });
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Q2. What is Call back?
Ans. 
A callback is a function passed as an argument to another function to be executed later.
• Callback functions are commonly used in asynchronous programming to handle responses or events.

• Callbacks can be synchronous or asynchronous.

• Example: setTimeout function in JavaScript takes a callback function as an argument to be executed after a specified time.
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Yes, Aptitude test is so think and great full in my knowledge

The coding test is for HTML CSS for the frontend backend for the javascript

Q1. Why should we hire you?
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