Database Concepts

Database Concepts

Assessment

Flashcard

Computers

University

Practice Problem

Easy

Created by

CM Varun

Used 2+ times

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10 questions

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1.

FLASHCARD QUESTION

Front

What is an ER Diagram?

Back

A visual representation of how data in a database is organized and how different elements (entities) relate to each other.

2.

FLASHCARD QUESTION

Front

What are Implicit Cursors?

Back

A cursor that's automatically created and managed by the database system when certain SQL statements are executed, like SELECT INTO, INSERT, UPDATE, or DELETE.

3.

FLASHCARD QUESTION

Front

What are Explicit Cursors?

Back

A user-defined cursor that you declare, open, fetch from, and close manually in your PL/SQL code, allowing for complete control over the cursor's lifecycle, row-by-row processing, and custom logic.

4.

FLASHCARD QUESTION

Front

What does Atomicity ensure in a transaction?

Back

It ensures that either the entire transaction completes fully or doesn’t execute at all.

5.

FLASHCARD QUESTION

Front

What does Consistency ensure in a database?

Back

It ensures that a database remains in a valid state before and after a transaction.

6.

FLASHCARD QUESTION

Front

What does Isolation ensure in transactions?

Back

It ensures that multiple transactions can occur concurrently without leading to the inconsistency of the database state.

7.

FLASHCARD QUESTION

Front

What does Durability ensure in a transaction?

Back

It ensures that once the transaction has completed execution, the updates and modifications to the database are stored in and written to disk, persisting even if a system failure occurs.

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