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Grade 12 Quizzes, Questions & Answers

Recent Grade 12 Quizzes

Clustered Index Basics Quiz

Questions: 15 | Attempts: 10 | Last updated: May 1, 2026

Sample Question
What is a clustered index?

An index that sorts and stores table rows physically in the index order

An index that groups multiple unrelated tables together

An index that randomly arranges data for faster access

An index that only stores column names without data

Transaction Log Basics Quiz

Questions: 15 | Attempts: 10 | Last updated: May 1, 2026

Sample Question
What is the primary purpose of a transaction log in a database system?

To record all changes made by transactions for recovery purposes

To display user activity on the database

To monitor network traffic

To store user passwords

Read Committed Isolation Quiz

Questions: 15 | Attempts: 14 | Last updated: May 1, 2026

Sample Question
What is the primary characteristic of Read Committed isolation level?

Allows dirty reads and phantom reads

Prevents dirty reads but allows non-repeatable reads

Provides full serializability

Locks all rows for the entire transaction

Transaction Isolation Basics Quiz

Questions: 15 | Attempts: 10 | Last updated: May 1, 2026

Sample Question
What is a transaction in a database?

A single database operation

A sequence of operations treated as one atomic unit

A permanent change to the database

A backup of the database

Database Isolation Basics Quiz

Questions: 15 | Attempts: 10 | Last updated: May 1, 2026

Sample Question
What does the 'I' in ACID stand for?

Integrity

Isolation

Index

Input

SQL GRANT Statement Quiz

Questions: 15 | Attempts: 12 | Last updated: May 1, 2026

Sample Question
Which SQL statement is used to give permissions to a user on a database object?

GRANT

PERMIT

ALLOW

AUTHORIZE

SQL DCL Basics Quiz

Questions: 16 | Attempts: 11 | Last updated: May 1, 2026

Sample Question
What does DCL stand for in SQL?

Data Control Language

Database Constraint Logic

Data Compilation Layer

Dynamic Connection Link

Third Normal Form Basics Quiz

Questions: 15 | Attempts: 13 | Last updated: May 1, 2026

Sample Question
What is the primary goal of database normalization?

Reduce data redundancy and improve data integrity

Increase storage space usage

Make queries run slower

Add more columns to tables

Debugging Best Practices Quiz

Questions: 15 | Attempts: 10 | Last updated: Apr 30, 2026

Sample Question
What is the primary goal of debugging?

To write more code

To identify and fix errors in a program

To improve code speed only

To add new features

Beta Testing Basics Quiz

Questions: 15 | Attempts: 10 | Last updated: Apr 30, 2026

Sample Question
What is the primary goal of beta testing in the software development lifecycle?

To find and fix all bugs before release

To gather real-world user feedback and identify issues in a controlled environment

To replace unit testing entirely

To train the development team

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