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js interview questions
function addFourNumbers(num1,num2,num3,num4){
return num1 + num2 + num3 + num4;
}
let fourNumbers = [5, 6, 7, 8];
addFourNumbers(...fourNumbers);
// Spreads [5,6,7,8] as 5,6,7,8
let array1 = [3, 4, 5, 6];
let clonedArray1 = [...array1];
// Spreads the array into 3,4,5,6
console.log(clonedArray1); // Outputs [3,4,5,6]
let obj1 = {x:'Hello', y:'Bye'};
let clonedObj1 = {...obj1}; // Spreads and clones obj1
console.log(obj1);
let obj2 = {z:'Yes', a:'No'};
let mergedObj = {...obj1, ...obj2}; // Spreads both the objects and merges it
console.log(mergedObj);
// Outputs {x:'Hello', y:'Bye',z:'Yes',a:'No'};
Javascript Interview Questions
//Javascript Interview Questions
var a = [];
var b = a;
console.log(a == b);
// true
console.log(a === b);
// true
javascript interview questions
var student= {age:20, batch:"ABC"};
Delete student. age;
Javascript Interview Questions
//Javascript Interview Questions
var array = [7, 5, 4, 0];
var name = "john";
console.log(...array);
//7 5 4 0
javascript interview questions
(function(){
var a = b = 3;
})();
console.log("a defined? " + (typeof a !== 'undefined'));
console.log("b defined? " + (typeof b !== 'undefined'));
js interview questions
function sumOfThreeElements(...elements){
return new Promise((resolve,reject)=>{
if(elements.length > 3 ){
reject("Only three elements or less are allowed");
}
else{
let sum = 0;
let i = 0;
while(i < elements.length){
sum += elements[i];
i++;
}
resolve("Sum has been calculated: "+sum);
}
})
}
Javascript Interview Questions
//Javascript Interview Questions
var a = [];
var b = [];
console.log(a == b);
//false
console.log(a === b);
//false
javascript interview questions interviewbit
// Traditional function expression
var multiplyBy2 = function(num){
return num * 2;
}
// Arrow function expression
var arrowMultiplyBy2 = num => num * 2;
js interview questions
function display()
{
a = 10;
b = 20;
c = a+b;
debugger;
doc.write(c);
doc.write(a);
}
display();
js interview questions
function display()
{
a = 10;
b = 20;
c = a+b;
doc.write(c);
doc.write(a);
}
display();
javascript interview questions
var currentDate = new Date();
var day = currentDate.getDate();
Var month = currentDate.getMonth() + 1;
var monthName;
var hours = currentDate.getHours();
var mins = currentDate.getMinutes();
var secs = currentDate.getSeconds();
var strToAppend;
If (hours >12 )
{
hours1 = "0" + (hours - 12);
strToAppend = "PM";
}
else if (hours <12)
{
hours1 = "0" + hours;
strToAppend = "AM";
}
else
{
hours1 = hours;
strToAppend = "PM";
}
if(mins<10)
mins = "0" + mins;
if (secs<10)
secs = "0" + secs;
switch (month)
{
case 1:
monthName = "January";
break;
case 2:
monthName = "February";
break;
case 3:
monthName = "March";
break;
case 4:
monthName = "April";
break;
case 5:
monthName = "May";
break;
case 6:
monthName = "June";
break;
case 7:
monthName = "July";
break;
case 8:
monthName = "August";
break;
case 9:
monthName = "September";
break;
case 10:
monthName = "October";
break;
case 11:
monthName = "November";
break;
case 12:
monthName = "December";
break;
}
var year = currentDate.getFullYear();
var myString;
myString = "Today is " + day + " - " + monthName + " - " + year + ".<br />Current time is " + hours1 + ":" + mins + ":" + secs + " " + strToAppend + ".";
document.write(myString);
Javascript Interview Questions
//Javascript Interview Questions
var a = [15];
var b = [15];
console.log(a[0] == b[0]);
//ture
console.log(a[0] === b[0]);
//true
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