Q91. What is the purpose of data validation in the data processing cycle?
a) To enter data into the system
b) To check the accuracy and quality of data before processing
c) To store data in a database
d) To display data on a screen
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Correct Answer: b) To check the accuracy and quality of data before processing
Explanation: Data validation ensures that data is accurate, complete, and consistent before it is processed. This step is crucial to avoid errors and ensure reliable output.
Q92. In data processing, what is a “data warehouse”?
a) A storage device
b) A collection of raw data
c) A large, centralized repository of data
d) A software tool for data visualization
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Correct Answer: c) A large, centralized repository of data
Explanation: A data warehouse is a centralized repository that stores large volumes of data from various sources. It is used for analysis, reporting, and decision-making.
Q93. Which stage in the data processing cycle involves converting data into a useful format for decision-making?
a) Data Input
b) Data Processing
c) Data Output
d) Data Storage
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Correct Answer: c) Data Output
Explanation: The data output stage involves converting processed data into a useful format, such as reports, graphs, or visualizations, which can be used for decision-making.
Q94. What is data mining?
a) Extracting information from large datasets
b) Storing data in a database
c) Encrypting data for security
d) Deleting redundant data
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Correct Answer: a) Extracting information from large datasets
Explanation: Data mining involves analyzing large datasets to identify patterns, trends, and relationships that can provide valuable insights for decision-making and forecasting.
Q95. Which of the following is an example of a data processing application?
a) Microsoft Word
b) Adobe Photoshop
c) Microsoft Excel
d) VLC Media Player
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Correct Answer: c) Microsoft Excel
Explanation: Microsoft Excel is a data processing application that allows users to organize, analyze, and visualize data using spreadsheets, formulas, and charts.
Q96. What is the role of data analysis in the data processing cycle?
a) Inputting data into the system
b) Transforming raw data into meaningful information
c) Storing data in memory
d) Displaying data on a screen
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Correct Answer: b) Transforming raw data into meaningful information
Explanation: Data analysis is the process of examining, cleaning, and transforming raw data into meaningful information, which can then be used to make informed decisions.
Q97. Which of the following is an example of real-time data processing?
a) Processing payroll at the end of the month
b) Updating bank account balances immediately after transactions
c) Generating a report at the end of the day
d) Storing files on a hard drive
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Correct Answer: b) Updating bank account balances immediately after transactions
Explanation: Real-time data processing occurs instantly, as in the case of updating bank account balances immediately after a transaction. It ensures that data is current and accurate.
Q98. In data processing, what is meant by “batch processing”?
a) Processing data immediately as it is received
b) Grouping data into batches and processing it all at once
c) Storing data for later processing
d) Using multiple processors to speed up processing
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Correct Answer: b) Grouping data into batches and processing it all at once
Explanation: Batch processing involves collecting data over a period of time and processing it all at once. It is typically used in situations where immediate processing is not required.
Q99. What is the purpose of data aggregation in data processing?
a) To break down data into smaller parts
b) To combine data from multiple sources into a single summary
c) To delete unwanted data
d) To encrypt data for security
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Correct Answer: b) To combine data from multiple sources into a single summary
Explanation: Data aggregation involves combining data from multiple sources into a single summary or report, which can be analyzed to provide insights or support decision-making.
Q100. What is an example of an output device used in the final stage of the data processing cycle?
a) Keyboard
b) CPU
c) Monitor
d) RAM
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Correct Answer: c) Monitor
Explanation: A monitor is an output device used in the final stage of the data processing cycle to display processed data in a visual format, such as text, images, or graphs.