What is callback Hell? when we nest multiple callbacks within a function is called a callback hell. getArticles(20, (user) => { console.log("Fetch articles", user); getUserData(user.username, (name) => { console.log(name); getAddress(name...
3 Pillars of GSM security are Authentication Encryption Privacy(confidentiality) Authentication The secret authentication key (Ki) is not known to the mobile user and is the property of the service provider, the home system of the mobile station ...
Unlike java in javascript we have only single block to handle error try { // un-comment line below to see (reference error) // show(); // un-comment line below to see (type error) // a = "".toFixed() } catch (e) { if (e instanceo...