Question
Kelly designed a Key-Value Store database for storing Customer Information for a Banking application. She has created a Column Family called Demographics. The initial design
Kelly designed a Key-Value Store database for storing Customer Information for a Banking application. She has created a Column Family called "Demographics." The initial design of the Demographics Column Family included the columns "First Name","Last Name", "Address","Telephone Number", and "Gender". The database is now operational. However, the users requested a change to store Customer's date of birth in the database too. Kelly intends to add a new column called "BIRTH_DATE" to Demographics column family. Can she do it without a schema change?
Yes No
Kelly designed a Key-Value Store database for storing Customer Information for a Banking application. She has created a Column Family called "Demographics." The initial design of the Demographics Column Family included the columns "First Name","Last Name", "Address","Telephone Number","Birth Date," and "Gender". The database is now operational. However, the users requested a change to store Customer's annual income, and mothly mortgage amounts. Since the requested information is financial, Kelly intends to create a new Column Famaily called "Financials", and add columns for annual income and monthly mortgage to this new Column Famaily. Does this change require a schema change?
Yes No
You are designing a web application. You have a requirement to provide a facility to the user to store his/her preferences on the look-and-feel of the web pages of your application. According to Fowler and Sadalage, which of the following database types is best suited for this requirement?
A. | A Graph Database | |
B. | A Key-Value type of Database | |
C. | A Document Database | |
D. | A Column Oriented Database |
You are creating a database for a Social Network System. The database is expected to have millions of users and each user can have a "Friends with" relation with many other users. Which of the following database types is best suited for this application?
A. | Document Database | |||||||||||||||||||||||||||||||||||||
B. | Graph Database | |||||||||||||||||||||||||||||||||||||
C. | Key Value Store | |||||||||||||||||||||||||||||||||||||
D. | Relational Database
In a Master-Salve replication, which node is responsible for insuring the updates to the data are replicated across all the nodes.
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