Database Study Materials for Competitive Exams

Database

Advanced SQL Data and Database Administration Data Modeling with ER Model Data Models into Database Designs Data Warehousing Database Design Using Normalization Database Processing for BIS Database Redesign Distributed Databases ER Model and Business Rules Introduction to Database Introduction to SQL JDBC, Java Server Pages, and MySQL Logical Database Design Managing Databases with Oracle Managing Multiuser Databases Modeling Data in the Organization Object-Oriented Data Modeling Object-Oriented Database ODBC, OLE DB, ADO, and ASP Physical Database Design SQL for Database Construction SQL Server 2000 The Client-Server Database The Database Development Process The Database Environment The Internet Database Environment The Relational Model and Normalization XML and ADO.NET

Q. Which of the following is NOT a valid normalization form?

A. First Normal Form (1NF)
B. Second Normal Form (2NF)
C. Third Normal Form (3NF)
D. Fourth Normal Form (4NF)

Solution

All listed forms are valid normalization forms; however, 4NF is less commonly discussed than the first three.

Correct Answer: D — Fourth Normal Form (4NF)

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Q. Which SQL clause is used to filter records in a query?

A. ORDER BY
B. GROUP BY
C. WHERE
D. HAVING

Solution

The 'WHERE' clause is used to filter records in a SQL query based on specified conditions.

Correct Answer: C — WHERE

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Q. Which SQL command is used to remove a table from a database?

A. DELETE
B. DROP
C. REMOVE
D. TRUNCATE

Solution

The SQL command used to remove a table from a database is DROP.

Correct Answer: B — DROP

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Q. Which SQL command is used to retrieve data from a database?

A. INSERT
B. UPDATE
C. SELECT
D. DELETE

Solution

The SQL command used to retrieve data from a database is SELECT.

Correct Answer: C — SELECT

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Q. Which SQL command is used to update existing records in a table?

A. MODIFY
B. UPDATE
C. CHANGE
D. SET

Solution

The UPDATE command is used to modify existing records in a table in SQL.

Correct Answer: B — UPDATE

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Q. Which SQL Server 2000 feature allows for the management of concurrent transactions?

A. Locking
B. Indexing
C. Partitioning
D. Replication

Solution

Locking is the feature in SQL Server 2000 that manages concurrent transactions to ensure data integrity.

Correct Answer: A — Locking

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Q. Which SQL statement is used to create an index?

A. CREATE INDEX
B. ADD INDEX
C. NEW INDEX
D. INDEX CREATE

Solution

The SQL statement used to create an index is 'CREATE INDEX'.

Correct Answer: A — CREATE INDEX

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Q. Which SQL statement is used to remove a table from a database?

A. DELETE TABLE
B. DROP TABLE
C. REMOVE TABLE
D. ALTER TABLE

Solution

The correct SQL statement to remove a table from a database is 'DROP TABLE'.

Correct Answer: B — DROP TABLE

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Q. Which SQL statement is used to retrieve data from a database?

A. GET
B. SELECT
C. FETCH
D. RETRIEVE

Solution

The SELECT statement is used to retrieve data from a database in SQL.

Correct Answer: B — SELECT

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Q. Which SQL statement is used to update existing records in a table?

A. MODIFY
B. UPDATE
C. CHANGE
D. SET

Solution

The UPDATE statement is used to modify existing records in a table.

Correct Answer: B — UPDATE

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Database

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