NA

Correct Option: A

The typeof “infinity” will return number. E.g. typeof Infinity; // it will return “number”, when we divide any number by zero it will generate infinity.

NA

Correct Option: B

The integers in JavaScript have accuracy up to 15 digits. E.g. var y=111111111111111; // value of y will be 111111111111111. For decimal the maximum number of decimals is 17.

NA

Correct Option: C

The numbers according to international IEEE 754 standard are stored as a double precision floating point. It stores the numbers in 64-bit format, stored in bits from 0 to 51, exponent in bits is from 52 to 62 and signs in a bit is 63.

NA

Correct Option: A

For converting any string to an array we use split() method. E.g. var tr=”t,o,I,k,l”; tr.split(“,”); tr.split(“|”); tr.split(“ ”); charAt returns a character from the given index, charCodeAt() returns Unicode of character at the given index. toLowerCase() method converts input string into lower case string.

NA

Correct Option: D

While using slice(), substr() and substring() method we pass numbers as parameters respective to the string. E.g var tes= str.slice(-10). -10 is indicates negative position. It does not work in Internet Explorer or older versions.