MCQ IN COMPUTER SCIENCE & ENGINEERING

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COMPUTER SCIENCE AND ENGINEERING

SQL

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A data ____ is a set of rules that define valid data.
A
constraint
B
data dictionary
C
query
D
all of these
Explanation: 

Detailed explanation-1: -Answer: Database. Explanation: A database is a set of rules and instructions that define a valid data.

Detailed explanation-2: -A data rule is an expression that determines the set of legal data that can be stored within a data object. Use data rules to ensure that only values compliant with the data rules are allowed within a data object. Data rules will form the basis for correcting or removing data if you decide to cleanse the data.

Detailed explanation-3: -A network protocol is an established set of rules that determine how data is transmitted between different devices in the same network.

Detailed explanation-4: -protocol, in computer science, a set of rules or procedures for transmitting data between electronic devices, such as computers. In order for computers to exchange information, there must be a preexisting agreement as to how the information will be structured and how each side will send and receive it.

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