Informatics Practices
Assertion (A): In hierarchical model, the data is organized in a tree-like structure.
Reasoning (R): In hierarchical model, searching for a particular record is a time-consuming process.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Answer
Both A and R are true and R is the correct explanation of A.
Explanation
The hierarchical model arranges data in a tree structure, where each record has a parent-child relationship. Searching for a specific record in such a model may require traversing through multiple levels of the hierarchy, which is time-consuming.
Related Questions
What does an RDBMS consist of?
- Collection of Records
- Collection of Keys
- Collection of Tables
- Collection of Fields
Assertion (A): Database management system is an application software which arranges data in a well-organized manner in the form of tables.
Reasoning (R): DBMS acts as an interface between the database stored in the computer memory and the user.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): A database consists of multiple tables.
Reasoning (R): A foreign key is used to represent the relationship between two tables.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): The limitations of traditional file system are overcome by storing data in a database.
Reasoning (R): We can organize related data logically in a database.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.