Inkoop Intern Interview Questions, Process, and Tips

Given a string, Print it with an alternate uppercase and lowercase letters

Q1. What is hoisting
Ans. 
Hoisting is a JavaScript mechanism where variable and function declarations are moved to the top of their containing scope during the compilation phase.
• Variable and function declarations are hoisted to the top of their scope.

• Only the declarations are hoisted, not the initializations.

• Function declarations take precedence over variable declarations.

• Hoisting can lead to unexpected behavior if not understood properly.
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Q2. What are arrow functions
Ans. 
Arrow functions are a concise way to write functions in JavaScript.
• Arrow functions have a shorter syntax compared to traditional function expressions.

• They do not have their own 'this' keyword, instead they inherit 'this' from the parent scope.

• Arrow functions are best suited for non-method functions.

• Example: const add = (a, b) => a + b;
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Q3. Difference between display flex and display block
Ans. 
display flex allows for flexible layouts with items displayed in a row or column, while display block stacks items vertically.
• display flex allows for items to be displayed in a row or column, with the ability to adjust spacing, alignment, and order

• display block stacks items vertically, taking up the full width available
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Q4. Difference between let and var
Ans. 
let is block scoped and var is function scoped in JavaScript.
• let is block scoped, meaning it is only accessible within the block it is declared in.

• var is function scoped, meaning it is accessible throughout the function it is declared in.

• Using let can help prevent variable hoisting issues.

• let allows for better variable scoping and reduces the risk of accidental redeclaration.

• Example: let x = 10; var y = 20; console.
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Q5. What are promises
Ans. 
Promises are a way in JavaScript to handle asynchronous operations. They represent a value that may be available now, in the future, or never.
• Promises are objects that represent the eventual completion (or failure) of an asynchronous operation.

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

• Promises are commonly used in JavaScript to handle asynchronous operations such as fetching data from a server...read more
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