- SQL Tutorial
- SQL - Home
- SQL - Overview
- SQL - RDBMS Concepts
- SQL - Databases
- SQL - Syntax
- SQL - Data Types
- SQL - Operators
- SQL - Expressions
- SQL Database
- SQL - Create Database
- SQL - Drop Database
- SQL - Select Database
- SQL - Rename Database
- SQL - Show Databases
- SQL - Backup Database
- SQL Table
- SQL - Create Table
- SQL - Show Tables
- SQL - Rename Table
- SQL - Truncate Table
- SQL - Clone Tables
- SQL - Temporary Tables
- SQL - Alter Tables
- SQL - Drop Table
- SQL - Delete Table
- SQL - Constraints
- SQL Queries
- SQL - Insert Query
- SQL - Select Query
- SQL - Select Into
- SQL - Insert Into Select
- SQL - Update Query
- SQL - Delete Query
- SQL - Sorting Results
- SQL Views
- SQL - Create Views
- SQL - Update Views
- SQL - Drop Views
- SQL - Rename Views
- SQL Operators and Clauses
- SQL - Where Clause
- SQL - Top Clause
- SQL - Distinct Clause
- SQL - Order By Clause
- SQL - Group By Clause
- SQL - Having Clause
- SQL - AND & OR
- SQL - BOOLEAN (BIT) Operator
- SQL - LIKE Operator
- SQL - IN Operator
- SQL - ANY, ALL Operators
- SQL - EXISTS Operator
- SQL - CASE
- SQL - NOT Operator
- SQL - NOT EQUAL
- SQL - IS NULL
- SQL - IS NOT NULL
- SQL - NOT NULL
- SQL - BETWEEN Operator
- SQL - UNION Operator
- SQL - UNION vs UNION ALL
- SQL - INTERSECT Operator
- SQL - EXCEPT Operator
- SQL - Aliases
- SQL Joins
- SQL - Using Joins
- SQL - Inner Join
- SQL - Left Join
- SQL - Right Join
- SQL - Cross Join
- SQL - Full Join
- SQL - Self Join
- SQL - Delete Join
- SQL - Update Join
- SQL - Left Join vs Right Join
- SQL - Union vs Join
- SQL Keys
- SQL - Unique Key
- SQL - Primary Key
- SQL - Foreign Key
- SQL - Composite Key
- SQL - Alternate Key
- SQL Indexes
- SQL - Indexes
- SQL - Create Index
- SQL - Drop Index
- SQL - Show Indexes
- SQL - Unique Index
- SQL - Clustered Index
- SQL - Non-Clustered Index
- Advanced SQL
- SQL - Wildcards
- SQL - Comments
- SQL - Injection
- SQL - Hosting
- SQL - Min & Max
- SQL - Null Functions
- SQL - Check Constraint
- SQL - Default Constraint
- SQL - Stored Procedures
- SQL - NULL Values
- SQL - Transactions
- SQL - Sub Queries
- SQL - Handling Duplicates
- SQL - Using Sequences
- SQL - Auto Increment
- SQL - Date & Time
- SQL - Cursors
- SQL - Common Table Expression
- SQL - Group By vs Order By
- SQL - IN vs EXISTS
- SQL - Database Tuning
- SQL Function Reference
- SQL - Date Functions
- SQL - String Functions
- SQL - Aggregate Functions
- SQL - Numeric Functions
- SQL - Text & Image Functions
- SQL - Statistical Functions
- SQL - Logical Functions
- SQL - Cursor Functions
- SQL - JSON Functions
- SQL - Conversion Functions
- SQL - Datatype Functions
- SQL Useful Resources
- SQL - Questions and Answers
- SQL - Quick Guide
- SQL - Useful Functions
- SQL - Useful Resources
- SQL - Discussion
SQL Mock Test
This section presents you various set of Mock Tests related to SQL Framework. You can download these sample mock tests at your local machine and solve offline at your convenience. Every mock test is supplied with a mock test key to let you verify the final score and grade yourself.
SQL Mock Test III
Q 1 - Which of the following is not true about multiple-row subqueries?
A - Multiple row subqueries return multiple rows from the outer SELECT statement.
B - Multiple row subqueries return multiple rows from the inner SELECT statement.
C - Multiple row subqueries use multiple-row comparison operators.
Answer : B
Q 2 - Which of the following comparison operators could be used in a multiple row query?
Answer : D
Q 3 - In which of the following cases a DML statement is executed?
A - When new rows are added to a table.
Answer : A
Q 4 - In which of the following cases a DML statement is not executed?
A - When existing rows are modified
Answer : C
Q 5 - Which of the following is not true about inserting news rows to a table?
A - The INSERT INTO statement is used for inserting new rows to a table
B - You cannot insert rows with NULL values to a table.
C - You may insert a new row containing values for each column.
Answer : B
Q 6 - Which of the following is true about inserting news rows to a table?
A - You must list values in the default order of the columns in the table.
B - You can also list the columns in the INSERT clause.
C - You can use the INSERT statement to add rows from one table to another.
Answer : D
Q 7 - Which of the following is not true about modifying rows in a table?
A - Existing rows in a table are modified using the UPDATE statement.
B - You can update more than one row at a time.
C - All the rows in a table are modified if you omit the WHERE clause.
Answer : D
Q 8 - Which of the following is true about modifying rows in a table?
A - You can update some rows in a table based on values from another table.
B - If you try to update a record related to an integrity constraint, it raises an error.
Answer : D
Q 9 - Which of the following is true about removing rows from a table?
A - You remove existing rows from a table using the DELETE statement
B - No rows are deleted if you omit the WHERE clause.
C - You cannot delete rows based on values from another table.
Answer : A
Q 10 - Which of the following is not true about removing rows from a table?
A - You can use a subquery in a DELETE statement.
B - Specific rows are deleted based on the WHERE clause condition.
C - A statement like, DELETE
Answer : C
Q 11 - Which statement allows conditional update, or insertion of data into a table simultaneously?
Answer : B
Q 12 - A transaction starts when
A - A COMMIT statement is issued
B - A ROLLBACK statement is issued
Answer : D
Q 13 - Which of the following is true about the SQL transaction control statements?
A - They ensure data consistency.
B - They allow preview of data changes before making permanent changes in data.
Answer : D
Q 14 - Which of the following is NOT true about the SQL transaction control statements?
A - The COMMIT statement ends the current transaction and makes all data changes permanent.
B - The ROLLBACK statement ends the transaction and discards all the pending data changes.
Answer : C
Q 15 - Which of the following is not true about the database objects?
A - Indexes improve performance of queries.
B - Views give alternative names to objects.
Answer : B
Q 16 - Which of the following is true about the CREATE TABLE statement?
B - This statement also record information in the data dictionary.
Answer : B
Q 17 - Which of the following is not true about the ALTER TABLE statement?
Answer : A
Q 18 - Consider the following schema −
LOCATIONS(subject_code, department_name, location_id, city);
Which code snippet will alter the table LOCATIONS and add a column named Address, with datatype VARCHAR2(100)?
A - ALTER TABLE locations ADD (address varchar2(100));
B - ALTER TABLE locations ADD COLUMN(address varchar2(100));
C - MODIFY TABLE locations ADD COLUMN (address varchar2(100));
Answer : A
Q 19 - Consider the following schema −
LOCATIONS(subject_code, department_name, location_id, city);
Which code snippet will alter the table LOCATIONS and change the datatype of the column CITY to varchar2(30)?
A - ALTER TABLE locations MODIFY COLUMN (city varchar2(30));
B - MODIFY TABLE locations ADD (city varchar2(30));
Answer : C
Q 20 - Consider the following schema −
LOCATIONS(subject_code, department_name, location_id, city);
Which code snippet will alter the table LOCATIONS and delete the column named CITY?
A - MODIFY TABLE locations DROP (city varchar2(30));
B - ALTER TABLE locations DROP COLUMN city;
Answer : B
Q 21 - Which of the following code will successfully delete the table LOCATIONS from the database?
Answer : A
Q 22 - Which of the following is true about deleting a table from the database?
A - All the data in the table are deleted
B - The table structure is removed
Answer : D
Q 23 - Which of the following code will remove all the rows from the table LOCATIONS?
Answer : C
Q 24 - Which of the following is not true about constraints?
A - A NOT NULL constraint specifies that the column cannot have a null value.
C - A PRIMARY KEY is same as UNIQUE.
D - A FOREIGN KEY enforces a foreign key relationship between a column and a referenced table.
Answer : C
Q 25 - Which of the following is not true about creating constraints?
A - Constraints are defined using the CREATE CONSTRAINT statement.
B - They are created at the same time when the table is created.
Answer : A
Answer Sheet
Question Number | Answer Key |
---|---|
1 | B |
2 | D |
3 | A |
4 | C |
5 | B |
6 | D |
7 | D |
8 | D |
9 | A |
10 | C |
11 | B |
12 | D |
13 | D |
14 | C |
15 | B |
16 | B |
17 | A |
18 | A |
19 | C |
20 | B |
21 | A |
22 | D |
23 | C |
24 | C |
25 | A |