Data | MCQs

Explanation

Sort/Report generators require more disk space than indexed/report generators .

Explanation

Integrity is the practice of being honest and showing a consistent and uncompromising adherence to strong moral and ethical principles and values

Explanation

Ireland fined Facebook's WhatsApp a record 225 million euro ($266m) on Thursday for privacy breaches after the EU privacy watchdog pressured the country to take a tougher line with a bigger penalty.

Explanation

The data dictionary is a part of a DBMS that stores metadata — details like table names, field names, data types, constraints, and relationships.

It helps the system manage and understand the structure of the database.

Explanation

long double provides higher precision than double and float for storing real numbers.

It allows more digits after the decimal point, making it suitable for high-accuracy calculations.

Explanation

Address consists of text (street, city, etc.).

It is non-numerical.

Marks, bank balance, and roll number are numerical values.

Explanation

A foreign key is used to link two tables and can contain duplicate values.

In contrast, primary, candidate, and even secondary keys are typically unique.

Explanation

A primary key must be unique for each record and never change.

Zip code is not unique (many people can share the same zip code), so it's not suitable as a primary key.

Explanation

In an Entity-Relationship (E-R) diagram, a rectangle represents an Entity.

Attributes are shown as ellipses.

Relationships are shown as diamonds.

Explanation

DFD stands for Data Flow Diagram.

It is used to represent the flow of data in a system.

It shows how data moves between processes, data stores, and external entities.