
CS10337 - Lecture #5
Authored by Rafael Orta
Information Technology (IT)
University
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of transaction locking?
To prevent unauthorized access
To ensure data integrity during concurrent access
To speed up data retrieval
To encrypt data
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a correct way to insert a row without specifying column names?
INSERT INTO table_name (column1, column2) VALUES (value1, value2)
INSERT INTO table_name VALUES (value1, value2)
INSERT INTO table_name SET column1 = value1, column2 = value2
INSERT INTO table_name (column1, column2) SET (value1, value2)
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the correct syntax for using a subquery to insert one or more rows into a table?
INSERT INTO table_name VALUES (value_list)
INSERT [INTO] table_name [(column_list)] select_statement
SELECT * FROM table_name WHERE condition
UPDATE table_name SET column = value
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the default mode for MySQL Workbench regarding updates?
Safe update mode
Fast update mode
Manual update mode
Automatic update mode
5.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
What does safe update mode prevent in MySQL Workbench? (Multiple Correct Answers)
Deleting rows without a WHERE clause
Updating rows if the WHERE clause is omitted
Inserting rows without a primary key
Creating tables without a foreign key
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which SQL statement would delete a row from 'invoice_line_items' where the invoice_id is 78 and invoice_sequence is 2?
DELETE FROM invoice_line_items WHERE invoice_id = 78 AND invoice_sequence = 2
DELETE FROM invoice_line_items WHERE invoice_id = 78 OR invoice_sequence = 2
DELETE FROM invoice_line_items WHERE invoice_id = 77 AND invoice_sequence = 2
DELETE FROM invoice_line_items WHERE invoice_id = 78 AND invoice_sequence = 3
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How can you change “Hansen” into “Nilsen” in the “LastName” column in the Persons table?
UPDATE Persons SET LastName=’Hansen’ INTO LastName=’Nilsen’
MODIFY Persons SET LastName=’Nilsen’ WHERE LastName=’Hansen’
MODIFY Persons SET LastName=’Hansen’ INTO LastName=’Nilsen’
UPDATE Persons SET LastName=’Nilsen’ WHERE LastName=’Hansen’
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