JavaScript Interview Questions
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⇩
Series: ➍
Level: Beginner
Topics:
➊ Variable Naming
➋ Variable Declaration
➌ Variable Scope
➍ Assignment Operators
➎ Bitwise Operators
Level: Beginner
Topics:
➊ Variable Naming
➋ Variable Declaration
➌ Variable Scope
➍ Assignment Operators
➎ Bitwise Operators
🚥 Disclaimer
⬖ The questions covered here are mostly conceptual.
⬘ I never claim only these type of questions are/should be asked during interviews.
⬗ For interviews, you should have fundamentals strong. And you should be able to provide solutions to practical problems.
⬖ The questions covered here are mostly conceptual.
⬘ I never claim only these type of questions are/should be asked during interviews.
⬗ For interviews, you should have fundamentals strong. And you should be able to provide solutions to practical problems.
➊ Variable Naming
➀ What is a variable?
➁ How to name a variable/Choose a valid variable name?
➂ Is "$" allowed in variable names?
➃ Can variable names begin with a numeric digit? If no, why?
➀ What is a variable?
➁ How to name a variable/Choose a valid variable name?
➂ Is "$" allowed in variable names?
➃ Can variable names begin with a numeric digit? If no, why?
➋ Variable Declaration
➀ Is variable declaration mandatory? What happens if a variable is not declared before using?
➁ How to declare a variable?
➂ What is the difference between let, const and var?
➃ What is the use of "use strict" directive?
➀ Is variable declaration mandatory? What happens if a variable is not declared before using?
➁ How to declare a variable?
➂ What is the difference between let, const and var?
➃ What is the use of "use strict" directive?
➄ What is "Hoisting"? Give some examples.
➅ Is there any default value assigned, if a variable is unassigned?
➆ How to declare multiple variables in one line?
➇ What is the easiest way to declare multiple variables and assign a single value to all of those at once?
➅ Is there any default value assigned, if a variable is unassigned?
➆ How to declare multiple variables in one line?
➇ What is the easiest way to declare multiple variables and assign a single value to all of those at once?
➈ What is the difference between Static Typed and Dynamic Typed?
➉ Is JavaScript a Static or Dynamic Typed?
➀➀ How to check type of a variable?
➉ Is JavaScript a Static or Dynamic Typed?
➀➀ How to check type of a variable?
➌ Variable Scope
➀ What is a variable scope? What are different scopes?
➁ Using which object, all global scope variables can be accessed?
➂ What is a block?
➃ Out of let, const and var, which allows a variable to have block scoping?
➀ What is a variable scope? What are different scopes?
➁ Using which object, all global scope variables can be accessed?
➂ What is a block?
➃ Out of let, const and var, which allows a variable to have block scoping?
➍ Assignment Operators
➀ What does an assignment operator do?
➁ What is the simplest assignment operator?
➂ What is a shortcut assignment operator?
➃ Mention few shortcut assignment operators.
➀ What does an assignment operator do?
➁ What is the simplest assignment operator?
➂ What is a shortcut assignment operator?
➃ Mention few shortcut assignment operators.
Explain how below operators work
➄ &&=
➅ ||=
➆ ??=
➄ &&=
➅ ||=
➆ ??=
➎ Bitwise Operators
➀ Which bitwise operators does JavaScript support?
➁ What are different bitwise shift operators?
➂ Swap 2 numbers using a bitwise operator.
➃ Truncate a number using bitwise operator.
➀ Which bitwise operators does JavaScript support?
➁ What are different bitwise shift operators?
➂ Swap 2 numbers using a bitwise operator.
➃ Truncate a number using bitwise operator.
⚠️ Repost Notice ⚠️
⬖ Though this is my original work, it was previously posted in [CHIRPBIRDICON]
⬘ Many questions have been taken from the original 🧵
⬙ If you liked these questions and do feel others might learn from it, please support.
⬖ Though this is my original work, it was previously posted in [CHIRPBIRDICON]
⬘ Many questions have been taken from the original 🧵
⬙ If you liked these questions and do feel others might learn from it, please support.
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