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Grade 12 Quizzes, Questions & Answers

Recent Grade 12 Quizzes

Asymmetric Encryption Basics Quiz

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

Sample Question
What is the primary advantage of asymmetric encryption over symmetric encryption?

It uses only one key for both encryption and decryption

It uses two different keys—a public key and a private key

It is faster than symmetric encryption

It requires less computational power

Data Warehouse Basics Quiz

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

Sample Question
What is a data mart?

A small, focused subset of a data warehouse designed for a specific business function or department

A physical retail store that sells data analytics software

A temporary database used only for backup purposes

A tool for organizing spreadsheets in Excel

Cache Hit and Miss Basics Quiz

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

Sample Question
What happens to system performance when a CPU finds the requested data in the cache?

A cache hit occurs and access time is significantly reduced

A cache miss occurs and the system must access main memory

The data is automatically deleted from the cache

The processor speed decreases to save power

Database Caching Basics Quiz

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

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

To permanently store all database records

To temporarily store frequently accessed data for faster retrieval

To encrypt sensitive information

To replace the main database entirely

Horizontal Partitioning Basics Quiz

Questions: 15 | Attempts: 11 | Last updated: May 1, 2026

Sample Question
What is horizontal partitioning?

Dividing rows of data across multiple servers based on a partition key

Dividing columns of a table into separate tables

Creating backup copies of an entire database

Splitting a single server into multiple virtual machines

Database Partitioning Basics Quiz

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

Sample Question
What is database partitioning?

Dividing a database into smaller, independent subsets of data

Creating backup copies of the entire database

Encrypting sensitive database records

Compressing database files to save storage space

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: 12 | 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

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