Last active
July 16, 2022 06:26
-
-
Save Roshankrsoni/3deffa545b28c8486dc17188ac2f57da to your computer and use it in GitHub Desktop.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Frontend/React Interview Questions | |
| 1. What are sementic tags in Html?tell some html5 tags | |
| 2. Explain the this keyword with arrow function and normal function. | |
| -> // Arrow Function Normal Function | |
| // SOLUTION | |
| let user = { | |
| name: "GFG", | |
| gfg1:() => { | |
| console.log("hello " + this.name); // no 'this' binding here | |
| }, | |
| gfg2(){ | |
| console.log("Welcome to " + this.name); // 'this' binding works here | |
| } | |
| }; | |
| user.gfg1(); | |
| user.gfg2(); | |
| 3. Write a Program | |
| Input-> searchBoxKey | |
| output-> search_Box_Key | |
| // SOLUTION | |
| -> let str5 = 'searchBoxKey'; | |
| str5.split(/(?=[A-Z])/).join('_') | |
| 4. Count the duplicate element in arrray | |
| -> input = ['a','b','c','d','d','e','a','b','c','f','g','h','h','h','e','a']; | |
| output - { a: 3, b: 2, c: 2, d: 2, e: 2, f: 1, g: 1, h: 3 } | |
| // SOLUTION | |
| function uniqueCount(arr){ | |
| let counter = {} | |
| arr.forEach((val)=>{ | |
| counter[val] = (counter[val] || 0) + 1 | |
| }) | |
| return counter | |
| } | |
| 5. What is event bubbling? How can we prevent it? | |
| 6. Debouncing -> code | |
| 7. Uses of Hooks and refs | |
| 8. controlled & uncontrolled component | |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment