Database and SQL Mock Test – Free Online Quiz V1.1

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Database and SQL Mock Test – Free Online Assessment Version 1.1

Database and SQL mock test v1.0 with 50 multiple choice questions for practice

The Database & SQL Mock Test v1.1 is a structured practice quiz designed to help learners strengthen and expand their understanding of database concepts and SQL querying skills. This version builds upon the fundamentals covered in v1.0 and introduces more detailed and practical questions commonly faced in academic exams and technical interviews.

This quiz focuses on core database operations, SQL commands, keys, joins, normalization, transactions, and database management concepts that are essential for students, fresh graduates, and early-career IT professionals working with data-driven applications.

Version 1.1 includes Questions 51–100, extending the assessment depth while maintaining beginner-to-intermediate difficulty. It emphasizes conceptual clarity and correct SQL usage rather than advanced specialization.

📌 What This Version Covers

  • SQL clauses: WHERE, GROUP BY, HAVING, ORDER BY

  • Data manipulation commands (SELECT, INSERT, UPDATE, DELETE)

  • Keys: Primary Key, Foreign Key, Unique Key

  • SQL functions (COUNT, SUM, AVG, MIN, MAX)

  • Joins and relationships between tables

  • Constraints and data integrity

  • Transactions and ACID properties

  • Indexes, views, triggers, and permissions

  • Normalization and redundancy reduction

  • Basic database security concepts

✨ Quiz Features

  • 📝 50 multiple-choice questions (Q51–Q100)

  • ⏱️ Time-based test environment

  • 📊 Instant score calculation and result display

  • 🔁 Retake option for continuous practice

  • 🎯 Suitable for beginners and intermediate learners

👤 Who Should Take This Test?

  • Students learning databases and SQL

  • Fresh graduates preparing for technical interviews

  • Entry-level developers and database learners

  • IT professionals revising core SQL concepts

  • Anyone aiming to improve database fundamentals

ℹ️ Version Information

  • Current Version: 1.1

  • Question Range: Q51–Q100

  • Level: Beginner to Intermediate

  • Future Updates: Advanced SQL queries, subqueries, stored procedures, optimization techniques, and detailed performance analytics

💡 This quiz is designed as a practical learning and self-assessment tool. Repeating the test will help users improve accuracy, confidence, and readiness for real-world database and SQL tasks.

1 / 50

Q100. Which database concept reduces data redundancy?

2 / 50

Q99. Which SQL command removes user permissions?

3 / 50

Q98. Which SQL command grants permissions?

4 / 50

Q97. Which SQL statement removes duplicate rows between queries?

5 / 50

Q96. Which SQL clause is evaluated after GROUP BY?

6 / 50

Q95. Which key can contain NULL values?

7 / 50

Q94. Which database model uses tables?

8 / 50

Q93. Which SQL feature ensures data consistency?

9 / 50

Q92. Which command reverses a transaction?

10 / 50

Q91. Which command saves a transaction permanently?

11 / 50

Q90. Which SQL keyword checks for missing values?

12 / 50

Q89. Which SQL command combines results of two queries?

13 / 50

Q88. Which database object automatically executes on events?

14 / 50

Q87. Which SQL clause limits the number of rows returned?

15 / 50

Q86. Which index improves data retrieval speed?

16 / 50

Q85. Which SQL statement is used to retrieve data?

17 / 50

Q84. Which normalization form removes partial dependency?

18 / 50

Q83. Which SQL command is used to rename a table?

19 / 50

Q82. Which property ensures database reliability?

20 / 50

Q81. Which database object stores query results virtually?

21 / 50

Q80. Which keyword is used to set a default value?

22 / 50

Q79. Which SQL command adds a new column to a table?

23 / 50

Q78. Which JOIN returns all records from both tables?

24 / 50

Q77. Which SQL function returns the sum of values?

25 / 50

Q76. Which constraint limits column values to a specific condition?

26 / 50

Q75. Which command is used to remove a database?

27 / 50

Q74. What does SQL stand for?

28 / 50

Q73. Which JOIN returns all records from the left table?

29 / 50

Q72. Which statement is used to change a table structure?

30 / 50

Q71. Which SQL function returns the smallest value?

31 / 50

Q70. Which SQL clause groups rows with the same values?

32 / 50

Q69. Which SQL command deletes selected rows from a table?

33 / 50

Q68. Which key creates a relationship between two tables?

34 / 50

Q67. Which SQL function returns the average value?

35 / 50

Q66. Which constraint ensures all values in a column are unique?

36 / 50

Q65. Which SQL command is used to create a new database?

37 / 50

Q64. Which SQL clause filters grouped records?

38 / 50

Q63. Which JOIN returns only matching records from both tables?

39 / 50

Q62. Which SQL command removes all rows but keeps the table structure?

40 / 50

Q61. Which key uniquely identifies each record in a table?

41 / 50

Q60. Which SQL operator is used for pattern matching?

42 / 50

Q59. Which SQL function returns the highest value from a column?

43 / 50

Q58. Which SQL clause is used to sort query results?

44 / 50

Q57. Which SQL command permanently deletes a table?

45 / 50

Q56. Which constraint ensures a column cannot contain NULL values?

46 / 50

Q55. Which SQL command is used to modify existing data in a table?

47 / 50

Q54. Which SQL keyword removes duplicate rows from a result set?

48 / 50

Q53. Which SQL function returns the total number of rows?

49 / 50

Q52. Which SQL command is used to insert new records into a table?

50 / 50

Q51. Which SQL clause is used to filter records based on a condition?

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