Question

1. Portals are part of the __________ network application category.

Group of answer choices

Communication

Education

2. What are the primary operations of a relational database?

(i) join

(ii) select

(iii) project

3. In a customer database, Customer ID, Customer Name, Contact Name, and Customer Phone are stored in columns. These are types of ____________

Group of answer choices

attributes

relationships

records

foreign keys

primary keys

Group of answer choices

(i) and (iii)

(ii) and (iii)

All of these

(i) and (ii)

Collaboration

Discovery

4. This process removes redundancies that may be present in a data base.

Group of answer choices

normalization

granularization

standardization

abstraction

Answer 1

Answer:

1) The answer is Discovery

Explanations:

Portals are part of Discovery network application category.

2) The answer is ii) and iii)

Explanation:

Basic operations in relational algebra are:

select, project, cartesian product, setdifference, union

3) The answer is Attributes.

Explanation:

Columns are known as attributes in database.

Rows are referred as records.

Primary key is the column which is unique for every row.

Foreign key is the one referring to another table

4) The answer is normalization

Explanation:

Normalization is the process to remove redundancies

Multiple normal forms are there: 1NF, 2NF, 3NF, BCNF , etc.

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