DBMS and RDBMS MCQs - Page 51 | Computer Science - IT

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Topic Notes: DBMS and RDBMS

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Master DBMS and RDBMS MCQs for Competitive Exams with our comprehensive, verified question bank. Designed for students and competitive exam aspirants across Pakistan, this study resource provides topic-wise practice questions for CSS, PMS, FPSC, PPSC, SPSC, KPPSC, BPSC, NTS, and university entry tests.

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Preparation Guide & Key Focus Areas for DBMS and RDBMS MCQs

When preparing for DBMS and RDBMS MCQs (Computer Science - IT), focus on core definitions, historical timelines, relevant provisions, and commonly tested factual points. Review each question below, test your knowledge against the given options, and inspect the detailed explanation to solidify your understanding.

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501

Report generators in DBMS are utilized to:

502

Referential integrity is a rule that the database enforces to ensure relationships between tables remain consistent. It is typically enforced using a:

503

Which type of database stores data in two-dimensional tables?

504

The key used to uniquely identify a record in a database table is:

505

A regular subquery is processed:

506

What is a key difference between a `UNIQUE` constraint and a `PRIMARY KEY` constraint?

A A `PRIMARY KEY` allows NULL values, while a `UNIQUE` constraint does not. B A table can have multiple `PRIMARY KEY` constraints, but only one `UNIQUE` constraint. C A `PRIMARY KEY` does not allow NULL values, while a `UNIQUE` constraint can allow one NULL value. D There is no difference; they are functionally identical.

507

In the relational model, what is a tuple?

508

Denormalization introduces ______ in a controlled manner.

509

The logical level of data abstraction describes:

510

What is an insertion anomaly?

A The inability to insert data about one entity without inserting data about another unrelated entity. B The inability to insert duplicate data into a table. C An error that occurs when data is inserted in the wrong format. D An error where inserting data causes other data to be deleted.

DBMS and RDBMS MCQs for Competitive Exams

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Topic Notes: DBMS and RDBMS

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