SQL Basics Quiz

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Question 1

Which SQL component is responsible for evaluating multiple execution plans to determine the most efficient way to process a query?

  • Query Parser

  • Execution Engine

  • Query Optimizer

  • Storage Engine

Question 2

What is the primary purpose of Data Control Language (DCL) commands in SQL?

  • To define database schemas (e.g., CREATE TABLE)

  • To manage user permissions (e.g., GRANT, REVOKE)

  • To manipulate data (e.g., INSERT, UPDATE)

  • To handle transactions (e.g., COMMIT, ROLLBACK)

Question 3

Which organization first standardized SQL as a query language?

  • IEEE

  • ANSI and ISO

  • W3C

  • ECMA

Question 4

What is the maximum allowed character length for table names in SQL according to the standard rules mentioned?

  • 30 characters

  • 20 characters

  • 15 characters

  • No fixed limit

Question 5

Which of the following is NOT listed as an advantage of SQL in the article?

  • Built-in backup and recovery tools

  • Support for real-time analytics

  • Multiple data views capability

  • Standardized language across platforms

Question 6

What is identified as a key reason for SQL's partial control limitation?

  • Complex syntax requirements

  • Hidden business rules

  • High licensing costs

  • Platform dependency issues

Question 7

Which of the following correctly represents a valid SQL bit string literal?

  • '10101010'

  • B'1010'

  • X'G5'

  • "11001100"

Question 8

How would you write an approximate numeric literal representing 5.5 × 10³ in SQL?

  • 5.5^3

  • 5.5E3

  • 5.5*10³

  • 5500.00

Question 9

Which SQL data type would be most appropriate for storing international customer names that may include non-Latin characters?

  • VARCHAR

  • CHAR

  • NVARCHAR

  • TEXT

Question 10

For a financial application requiring exact decimal precision in currency calculations, which numeric data type should be preferred?

  • FLOAT

  • REAL

  • DECIMAL

  • BIGINT

There are 10 questions to complete.

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