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Grade 12 Quizzes, Questions & Answers

Recent Grade 12 Quizzes

Referential Integrity Basics Quiz

Questions: 15 | Attempts: 10 | Last updated: May 2, 2026

Sample Question
What is referential integrity in a relational database?

A rule ensuring foreign key values match primary key values in related tables

A backup system that copies data across servers

The process of encrypting sensitive database information

A method for organizing table columns alphabetically

Data Streaming Basics Quiz

Questions: 15 | Attempts: 10 | Last updated: May 2, 2026

Sample Question
What is the primary difference between batch processing and stream processing?

Batch processes data in chunks over time; stream processes data continuously in real-time

Batch is faster; stream is slower

Batch uses databases; stream uses APIs

Batch handles small data; stream handles large data

Fact and Dimension Tables Quiz

Questions: 15 | Attempts: 13 | Last updated: May 2, 2026

Sample Question
What is the primary purpose of a fact table in a data warehouse?

Store numerical measures and transaction data

Define business rules and constraints

Archive historical records

Manage user access permissions

Execution Plan Operators Quiz

Questions: 15 | Attempts: 17 | Last updated: May 2, 2026

Sample Question
What does a Sequential Scan operator do in an execution plan?

Reads all rows from a table in order

Reads only indexed rows

Skips rows based on conditions

Sorts rows before reading

Query Rewriting Techniques Quiz

Questions: 15 | Attempts: 10 | Last updated: May 2, 2026

Sample Question
What is query rewriting in database optimization?

Rewriting a query to produce the same result more efficiently

Changing the database schema to match the query

Converting SQL to a different programming language

Removing all WHERE clauses from a query

Deadlock Detection Basics Quiz

Questions: 15 | Attempts: 11 | Last updated: May 2, 2026

Sample Question
What is a deadlock in a concurrent system?

A situation where two or more processes cannot proceed because each waits for a resource held by another

A process that terminates unexpectedly

A lock that cannot be released by any process

A temporary delay in process execution

SQL Conditional Expressions Quiz

Questions: 15 | Attempts: 11 | Last updated: May 2, 2026

Sample Question
Which SQL keyword is used to test if a value exists within a specified range?

BETWEEN

IN

LIKE

EXISTS

Stored Procedure Basics Quiz

Questions: 15 | Attempts: 30 | Last updated: May 2, 2026

Sample Question
What is a stored procedure?

A set of SQL statements stored and executed on the database server

A temporary table used for calculations

A type of database backup file

A method of encrypting sensitive data

Ad Hoc Testing Basics Quiz

Questions: 15 | Attempts: 11 | Last updated: May 2, 2026

Sample Question
What is ad hoc testing?

Unplanned testing based on tester intuition and domain knowledge

Testing that follows a strict, predefined test plan

Automated testing using scripts and tools

Testing performed only after release to production

Check Constraint Basics Quiz

Questions: 15 | Attempts: 10 | Last updated: May 2, 2026

Sample Question
What is a check constraint in a database?

A rule that ensures values in a column meet a specified condition

A method to automatically delete incorrect records

A constraint that only allows NULL values

A backup mechanism for data recovery

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