Database

Question 1

Command to display tables in sqlite terminal?

Answer 1

.table

Question 2

How to start sqlite database

Answer 2

sqlite3

Question 3

How to start, stop, and check the status of mysql server

Answer 3

1. mysql.server start
2. mysql.server stop
3. mysql.server status

Question 4

How do you login to mysql

Answer 4

mysql -u -p

Question 5

How do you create a new promise using bluebird?

Answer 5

var promise = require('bluebird');
new Promise(function(resolve, reject) {
});

Question 6

How do you describe .then in promise

Answer 6

Then is a continuation method for promises which takes a function that takes the value from the previous promise.

Question 7

What is Promise.all

Answer 7

This method is useful for when you want to wait for more than one promise to complete. It takes an iterable or a promise of an iterable. Examples of this could be for when you want to do multiple API calls and process them together or when you want to iterate over an array and process the result.