Interview Questions

- The maximum data rate supported by a GSM system is 9.6 kbps.
- However there are extensions to GSM standard to improve throughput.
- GPRS is one of the extended GSM service.
- The extended standards of GSM allows theoretical data rates on the order of 114 Kbit/s, but with throughput closer to 40Kbit/s in practice.

Error-first callbacks are used to pass errors and data as well. You have to pass the error as the first parameter, and it has to be checked to see if something went wrong. Additional arguments are used to pass data.

fs.readFile(filePath, function(err, data) {
if (err) {
// handle the error, the return is important here
// so execution stops here
return console.log(err)
}
// use the data object
console.log(data)
})

- GPRS uses 2.5 generation of GSM signals
- The radio interface is the same that of GSM
- GPRS uses 900 / 1800 Mhz, frequency band and GMSK modulation
- The bit rates are EGPRS, similar to EDGE
- Separate hardware and ports need to be added and availed.

OLTP stands for OnLine Transaction Processing. Applications that supports and manges transactions which involve high volumes of data are supported by OLTP system. OLTP is based on client-server architecture and supports transactions across networks.

OLAP stands for OnLine Analytical Processing. Business data analysis and complex calculations on low volumes of data are performed by OLAP. An insight of data coming from various resources can be gained by a user with the support of OLAP.

Type 4  (JDBC Net pure Java Driver) is the fastest JDBC driver.  Type 1 and Type 3 drivers will be slower than Type 2 drivers (the database calls are make at least three translations versus two), and Type 4 drivers are the fastest (only one translation).

In general, Services are Javscript functions and are responsible to do a specific tasks. Factories implements module pattern in which we use a factory method to generate an object which is use for building models.

It's syntax is
module.factory('factoryName', function);

Inbound Marketing :

     Inbound marketing refers to marketing activities that bring visitors in, rather than marketers having to go out to get prospect's attention.

1. Communication is interactive and two-way.

2. Customers come to you via search engines, refferals and social media

3. Marketers provide value

4. Marketers seek to entertain and/or educate

5. It is a cheaper way of marketing

6. It is the new trend in marketing

7. People are more in control of what information they receive and how

Outbound Marketing

    In Outbound marketing the company contacts the customer through a message. It uses offline methods such as trade shows, mails to customers and calling customers.

1. Communication is one-way.

2. Customers are sought out via print, TV, radio, banner advertising and cold calls.

3. Marketers Provide little to no added value.

4. Marketers rarely seek to entertain or educate.

5. It is expensive compared to inbound marketing

6. It is one of the traditional methods of marketing.

7. In outbound marketing company is in control.

 From the customer point of view, credit is the amount which is deposited into her or his account. And debit refers to that amount which is taken from the account of the customer.