Javascript Question & Answer Practice

Javascript Practice – Questions & Answers

Beginner Level

Q31. Write an if condition.

if(age > 18){
  console.log("Adult");
}

Q32. Write a for loop.

for(let i=0;i<5;i++){
  console.log(i);
}

Q33. Function syntax.

function greet(){
  console.log("Hi");
}

Q34. Call a function.

greet();

Q35. Arrow function.

const add = (a,b) => a+b;

Q36. Reduce function.

arr.reduce((a,b)=>a+b);

Q37. String length.

name.length;

Q38. Convert string to number.

Number("10");

Q39. JSON stringify.

JSON.stringify(obj);

Q40. JSON parse.

JSON.parse(jsonData);

Q41. Debounce concept.

Limits function execution frequency.

Q42. Throttle concept.

Executes function at fixed intervals.

Q43. Strict mode.

"use strict";

Q44. Module export.

export default myFunc;

Q45. Module import.

import myFunc from "./file.js";