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Grade 11 Quizzes, Questions & Answers

Recent Grade 11 Quizzes

SQL Insert and Update Statements Quiz

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

Sample Question
Which SQL keyword is used to add new rows to a table?

INSERT

UPDATE

ADD

CREATE

SQL Create and Drop Statements Quiz

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

Sample Question
Which SQL statement is used to create a new table in a database?

CREATE TABLE

INSERT TABLE

MAKE TABLE

NEW TABLE

Relational Algebra Projection Operation Quiz

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

Sample Question
What does the projection operation (π) in relational algebra do?

Selects specific columns from a relation

Filters rows based on a condition

Combines two relations together

Removes duplicate rows from a table

Relational Algebra Selection Operation Quiz

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

Sample Question
What does the selection operation (σ) in relational algebra do?

Filters rows based on a specified condition

Combines two relations by matching columns

Removes duplicate rows from a relation

Reorders rows in ascending order

Outer Join Basics Quiz

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

Sample Question
Which type of join returns all rows from the left table and matching rows from the right table?

INNER JOIN

LEFT OUTER JOIN

RIGHT OUTER JOIN

CROSS JOIN

Inner Join Basics Quiz

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

Sample Question
What does an INNER JOIN return?

Only rows that match in both tables

All rows from the left table

All rows from both tables

Rows that don't match in either table

Performance vs Consistency Trade offs Quiz

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

Sample Question
What is the primary trade-off between performance and consistency in distributed systems?

Faster response times may mean data isn't always up-to-date across all nodes

Consistency requires no internet connection

Performance is always more important than data accuracy

Consistency eliminates the need for backups

Database Design Trade offs Basics Quiz

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

Sample Question
What is the primary advantage of database normalization?

Reduces data redundancy and anomalies

Increases query speed automatically

Eliminates the need for indexes

Simplifies all user interfaces

Difference Between Normalization and Denormalization Quiz

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

Sample Question
What is the primary goal of normalization in database design?

Reduce data redundancy and maintain consistency

Speed up all queries automatically

Eliminate the need for joins

Increase storage space efficiently

Denormalization Basics Quiz

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

Sample Question
What is denormalization in database design?

Deliberately introducing redundancy to improve query performance

Removing all duplicate data from a database

Converting a database from relational to non-relational

Organizing data into multiple separate tables

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