10th Ncert Information Technology Webex
Question 1. What is database? Give example. Question 2. Write the purpose of DBMS. It 10th Ncert Information Technology Webex facilitates data sharing among all the applications requiring it. Question 3. Write the 10th Ncert Information Technology Webex relationship between a database and a table. CBSE Answer: A database contains multiple tables whereas, 10th Information Ncert Technology Webex a table cannot exist outside a database. Question 4. Give any one use of database. Question 5. What is field in database?
Give an example. Answer: A field is 10th Ncert Information Technology Webex an area, reserved for a specific piece of data. It is also known as attribute, e.
Question 6. Define the term DBMS. It is a computer based record keeping 10th Ncert Information Technology Webex 10th Ncert Information Technology Webex system. Question 7. State the primary goal of a DBMS. Answer: To provide a convenient and efficient environment in which we can store and retrieve information.
Question 8. Write any two uses of database management system. CBSE Answer:. Question 9. Give any two disadvantages of the database. Question Write any two advantages of using database. What is a 10th Ncert Information Technology Webex primary key? Give one advantage of using primary key. Answer: A primary key uniquely identifies 10th Ncert Information Technology Webex the record in the table. What is the significance of a primary key?
Answer: 10th Ncert Information Technology Webex A primary key cannot allow null values and must have a unique index. Name two 10th Ncert Information Technology Webex 10th Ncert Information Technology Webex possible primary keys for an Employee table. Write the significance of a foreign key. What 10th Ncert Information Technology Webex is the default extension of OO. What are the main purposes of a database system? How are fields, record and a table related to each other? Explain with Class 10th Ncert Question Bank Usa the help of an example. A record contains logically related fields.
A table Emp name 10th Ncert Information Technology Webex contains logically related records. Here EmpNo, Name and Salary are three different fields. A row stores complete information of a record whereas column stores only similar data values for all records. Distinguish between data and information. Define query in the context of database. These 10th Ncert Information Technology Webex 10th Ncert Information Technology Webex statements give you filtered data according to your conditions and specifications indicating the fields, records Ncert Exemplar Class 10th Maths Pdf Csv and summaries which a user wants to fetch from a database.
Define forms and Technology Webex Information 10th Ncert what is the need of using them? CBSE Answer: In a database, a form 10th Ncert Information Technology Webex is a window or a screen that contains numerous fields or spaces to enter data. Forms Information 10th Technology Ncert Webex can be used to view and edit your data. It is an interface in user specified layout. People generally prefer to enter data into a well-designed form, rather 10th Ncert Information Technology Webex than a table. What do you understand by report? Answer: When you want to print those records which are fetched from your database, design a report. It is an effective way to present data in a printed format.
It allows you to represent 10th Ncert Information Technology Webex data retrieved from one or more tables, so that it can be analysed. What do you mean by DBMS? CBSE Answer: It is a collection of programs that enables users to create, maintain database and control all the access to the database. DBMS is a software package that manages database, e. DBMS is actually a tool that is used to perform any kind of operation on data in database. Relational databases are powerful, so they require few assumptions about how data is related or how, it will 10th Ncert Information Technology Webex be extracted from the database.
A table named School containing data of students of the whole school is created, where each record consists of several fields including AdmissionNo Admission Number , RollNo Roll Number , Name. Which field out of these three should be set as the primary key and why? CBSE Answer: AdmissionNo should be set as primary key because admission numbers are unique for each and every students of the school, which is not possible in the case with RollNo and Name.
What is the utility of primary key in database? Write distinct features of primary keys. It can be a column or a set of columns in the table. Main features of primary key are as 10th Ncert Information Technology Webex follows:. Discuss the components of a database. Answer: A database consists of several components. Each 10th Ncert Information Technology Webex component plays an important role in the database system environment. The major components of 10th Ncert Information Technology Webex database are as follows:. Define database management system. Write two advantages of using database management system for school.
The primary goal of the DBMS is to provide an environment that is both convenient and efficient for user to retrieve and store information. Distinguish between a record and a field in a table, with an example. Write the steps to design a database. Answer: Steps to Design a Database There are various steps to design a database which are as follows:. Sanchita is working for a nationalised bank Information 10th Ncert Technology Webex and is in the process of creating a table to store the details of 10th Ncert Information Technology Webex 10th Ncert Information Technology Webex customers of the bank.
Find out, which of the following fields of table Bank can 10th Ncert Information Technology Webex be selected as primary key, candidate key Ncert Solutions Of Class 10th Chemistry University and alternate key? Consider the following database Student. The director of a company uses a database to store data about job title. This is a part of the database given below. Identify the columns out of the given three, which should not be present in each of the following tables: Answer: 10th Ncert Information Technology Webex i DateofBirth ii Admno iii Phonenumber.
Facilities offered by databases are a The ability to store a large amount of data in a structured format, easy update, sort query, 10th Ncert Information Technology Webex production of reports. Which of the following is not an example of database? CBSE a Cross knot game b Employee payroll management c Numeric calculator d Customer management system Answer: c Numeric calculator because it is used to calculate the numeric numbers only as it is unable to store data. Database is a combination of CBSE a hardware and software b hardware and operating system c software and operating system d utility programs 10th Webex Ncert Information Technology Answer: a A database consists of several components.
These are data, software, hardware and user. Database is made up of all the following components except a tables b queries 10th Ncert Information Technology Webex 10th Ncert Information Technology Webex c forms d formula bar Answer: d Database is made up of tables, queries and forms.
As we know, relations are known as table. Out of the following, which one is the most appropriate data field in context of employee table, if only one of these is required? All the information about a thing or a person is 10th Ncert Information Technology Webex known as a a database b file c field d record Answer: d A record refers to a raw of data, which represents a complete set of information in a table. Which of the following is not the main building block of a database? Which 10th Ncert Information Technology Webex of the following best describes a form?
CBSE a Form enables people to enter or view data in a database easily b Form summarises and prints data c A form filters data from a database based on a criteria d All of 10th Ncert Information Technology Webex the above Answer: a Form enables people to enter or view data in a database easily. DBMS is a program that controls the creation, maintenance and use of database. Also, it is a computer based record keeping system.
RDBMS provides relational operators to manipulate 10th Ncert Information Technology Webex the data.
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