Com1 Communication Technologies Data Researcher Interview Questions and Answers

Join queries in SQL are used to combine rows from two or more tables based on a related column between them.

• Use JOIN keyword to combine rows from two or more tables based on a related column

• Types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN

• Specify the columns to join on using ON clause

• Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column

GPRS is a mobile data service used for internet access on mobile devices, while GPS is a satellite-based navigation system used for location tracking.

• GPRS stands for General Packet Radio Service and is used for transmitting data over mobile networks.

• GPS stands for Global Positioning System and uses satellites to determine the location of a device.

• GPRS is used for internet access on mobile devices, while GPS is used for...read more

Raw data is unprocessed data that has not been analyzed or interpreted.

• Raw data is data that has been collected but not yet processed or analyzed.

• It can come in various forms such as numbers, text, images, or audio.

• To read raw data, one must first understand the format in which it is stored and then use appropriate tools or software to interpret it.

• For example, raw data from a survey may be in the form of a spreadsheet...read more

Authorization is the process of granting or denying access to resources based on the user's identity and privileges.

• Authorization determines what actions a user can perform on a system or application.

• It involves verifying the user's identity and checking if they have the necessary permissions.

• Authorization can be role-based, where access is granted based on predefined roles, or rule-based, where access is determined by...read more