Class x unit test-ii
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This document appears to be a practice test for a Class X Information Technology exam. It contains two sections - Section A with 6 short answer questions about database concepts like fields, records, tables, and validation. Section B contains 10 multiple choice questions testing knowledge of database terminology, data types, keys and more. The test covers core database topics and is meant to evaluate a student's understanding of relational database management systems.
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B. simple representation of complex real-world data structures
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C. DISTINCT
D. DIFFERENT
4. What does the column represent in a table?
a. Attribute of the table records
b. A complete record in the table
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d. A list of database tables
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c. CREATE
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b. A complete record in the table
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d. A list of database tables
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a. A complete data record
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c. A list of file systems on database server
d. The primary keys from all the tables.
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a. UPDATE
b. V$SYSLOG
c. CREATE
d. DETAIN
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A. SELECT
B. ABORT
C. GRANT
D. REVOKE
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A. ROW
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A. method of storing files on a disk drive
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C. name of system for designing software
D. method of designing invoices for customers
2. Which of the following are the most important elements of a security program for databases:
a. Integrity, referential index, user rights
b. Confidentiality. Integrity and Availability
c. Availability, multi-master replication, high-bandwidth
d. DBA, System Admin, and PMO
3. Suppose that you have a table with a number of product sales. The product code may repeat in the table as it is likely the same product could be sold multiple times. If you want to produce a list of the unique products that are sold, you could use which of the following keywords in the SELECT statement:
A. LIKE
B. ORDERED BY
C. DISTINCT
D. DIFFERENT
4. What does the column represent in a table?
a. Attribute of the table records
b. A complete record in the table
c. The system log from the database
d. A list of database tables
5. What does a row in the table represent?
a. A complete data record
b. List of system logs
c. A list of file systems on database server
d. The primary keys from all the tables.
6. Which of the following is an example of data definition language (DDL)?
a. UPDATE
b. V$SYSLOG
c. CREATE
d. DETAIN
7 . Which of the following is an example of data manipulation language (DML)?
A. SELECT
B. ABORT
C. GRANT
D. REVOKE
8. A _____________ key is an attribute that uniquely identifies a record in a table.
9. A _____________ key is an attribute that is a primary key in one table and is used as a reference in a second table to establish a relationship between the two tables.
10. When running a SELECT join, what is returned from the table:
A. ROW
B. Column
C. single attribute
D. all tables in the database
11. When running a PROJECT join, what is returned from the table:
A. COLUMN
B. ROW
C. Single Attribute
D. a list of tables in the database
12. What are the 3 types of relationships commonly shown on an entity relationship diagram?
A. 1 to 1
B. 1 to Many
C. Many to Many
D. All the above
E. None of the above
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A. graphical representation of all entities in a database and how the entities are related
b. list of the log files in the database.
C. list of all the tablespace names in a database
D. A diagram that shows how data is written to a physical disk drive.
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b. NULL
c. ZILTCH
D. NONE
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油
A database is a collection of information organized in a way that allows a computer program to select desired data quickly. A traditional database is organized into fields, records, and files. A field contains a single piece of information, a record contains one set of fields, and a file contains records.
A database management system (DBMS) is a collection of programs that allows users to enter, organize, and select data in a database. It performs functions like user management, data creation/modification/access, and database maintenance. Popular DBMS include Microsoft Access, Oracle, MySQL, SQL Server, and others.
Good database systems have ACID properties - Atomicity, Consistency, Isolation, and Durability.DBMS 4 | MySQL - DDL & DML Commands
DBMS 4 | MySQL - DDL & DML CommandsMohammad Imam Hossain
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This note includes the followings:
- Database Create, Drop Operations
- Database Table Create, Drop Operations
- Database Table Alter Operation
- Data insertion
- Data deletion
- Existing data update
- Searching data from data table (showing all record, specific columns, specific rows, column aliasing, sorting data, limiting data, distinct data)
- Aggregate functions
- Group by clause
- Having clause
- Types of table joins
- Table aliasing, Inner Join, Left/Right Join, Self Join
- Subquery operation (scalar subquery, column subquery, row subquery, correlated subquery, derived table)Ad
Class x unit test-ii
- 1. Name___________________________ Roll________ Sec___________ SHAMAYITA CONVENT SCHOOL Unit Test-II Class X Subject: Information Technology (IT) F.M 20 Section-A 1. Which field property specifies whether the field can be left empty while entering data into a record? 1 2. What is the default value for field size property of a text datatype in Open Office.org Base? 1 3. Write the steps to delete a row from a table in Base? 2 4. Name two real life applications of database. 2 5. How are field, record and table related to each other? Explain with an example. 2 6. Define the term validation. Write a validation check to restrict a value less than 10,000 in the field Basic Salary(Basic Salary is a numeric field). 2 Section-B Multiple Choice Questions (Choose the most appropriate option) :: 1 X 10=10 7. Possible primary key field for an Employee table will be a) Employee ID b) Employee Name c) Employee Address d) None of these 8. Duplication of data is called __ a) Data validation b) Data inconsistency c) Data redundancy d) None of these 9. Full form of RDBMS is __ a) Rational database management system b) Relational database management system c) Regional database management system d) Relational database mining system 10. The default extension of a Open Office.org Base file is ___. a) .odf b) .odb c) .mdb d) None of these 11. A text field can contain : a) Only numeric values b) Only alphabets c) Alphanumeric characters d) None of these 12. Memo data type in Base can store__ a) Exactly 255 characters b) above 255 characters c) below 255 characters d) None of these