Paper - II (x) — Database Management System is a DBMS, SAD & IoT (Basic CI) topic in the RAS/RPSC syllabus. This page gathers exam-style Paper - II (x) — Database Management System multiple-choice questions with correct answers and explanations, so aspirants can test recall and revise frequently examined concepts.
Practice 56 Paper - II (x) — Database Management System multiple-choice questions with detailed answers and explanations. Ideal for RAS/RPSC exam preparation.
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Q1. Which SQL command is used to add a new row into an existing table?
Explanation
INSERT is used to place a new record into a table. SELECT reads data, COMMIT finalizes transactional changes, and REVOKE belongs to access-control operations rather than row creation.
Q2. In a relational database table, what does one row normally represent?
Explanation
In the relational model, data is organized in tables. Each row represents one record or tuple, and columns represent attributes of that record.
Q3. An application mainly needs fixed relationships, joins between tables, and strict referential integrity. Which database choice is generally most suitable?
Explanation
The database choice should follow the workload. When the main needs are stable tabular structure, foreign-key relationships, joins, and constraint enforcement, an RDBMS is usually the most direct fit.
Q4. Which statement correctly describes a primary key in a relational table?
Explanation
In an RDBMS, a primary key is chosen to identify each record uniquely. Because it must identify a real row, it cannot be null, and duplicate key values are not allowed in the table.
Q5. What is the role of a foreign key in a relational database?
Explanation
A foreign key is used to represent a relationship between two tables. For example, an Orders table may store CustomerID as a foreign key referring to CustomerID in the Customers table, so orders cannot point to non-existing customers when referential integrity is enforced.
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