Introduction to Data and Databases Quiz - CBSE Class 9 Computer Science
Free practice quiz: Introduction to Data and Databases (CBSE Class 9 Computer Science). 20 multiple-choice questions with answers and explanations. Play online, no sign-up needed.
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What is data in the context of computer science?
- Raw facts and figures
- Processed information
- Cooked numbers
- Stylized text
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Answer: A. Raw facts and figures
Data refers to raw facts and figures that have no particular meaning until they are processed.
What is a key characteristic of a database?
- Data redundancy
- Data consistency
- Data disappearance
- Data misplacement
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Answer: B. Data consistency
A key characteristic of a database is ensuring data consistency, meaning that the data is reliable and accurate.
What is a primary key in a database?
- A tool for hacking
- A unique identifier for each record in a table
- A special type of programming language
- An encryption method
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Answer: B. A unique identifier for each record in a table
A primary key is a unique identifier for each record in a database table ensuring that each entry can be uniquely retrieved.
Which of these is an advantage of using a database?
- Increased data redundancy
- Faster data retrieval
- Complex setup process
- Limited scalability
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Answer: B. Faster data retrieval
Databases are designed in such a manner that they improve data retrieval speed, allowing for faster access and manipulation of data.
Which scenario best describes data processing?
- Entering data without an outcome
- Transforming raw data into meaningful information
- Storing data for indefinite periods
- Analyzing database software icons
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Answer: B. Transforming raw data into meaningful information
Data processing involves transforming raw data into meaningful information for decision-making and analysis.