Question 1

What is the purpose of using a mnemonic code for data?

Accepted Answer

The answer of What is the purpose of using a...

Question 2

A mathematical process of assuring data accuracy involves multiplying each of the digits in the original code by some predetermined weights,summing these results,and then dividing this sum by a modulus number.

Accepted Answer

This is referring to the process of calculating a check digit, which is commonly used in various industries (such as banking and shipping) to ensure the accuracy of data entry and transmission.

Question 3

List five of the eight data entry methods mentioned in the book.

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Question 4

Accuracy is improved by better feedback.

Accepted Answer

Better feedback allows for adjustments to be made, which can lead to improved accuracy. Without feedback, errors may continue to be made and accuracy may suffer.

Question 5

Data entered at the point of sale are reused throughout the entire order fulfillment process in a(n)ecommerce system.

Accepted Answer

Data entered at the point of sale, such as customer information and product details, are used throughout the entire order fulfillment process in an ecommerce system, such as processing the order, generating invoices, tracking shipments, and updating inventory. This helps to eliminate errors, reduce manual work, and improve efficiency.

Question 6

What are the four improvements to data accuracy that transactions conducted over ecommerce Web sites can offer?

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Question 7

In an ecommerce system,data is generally entered into the system by the programmer.

Accepted Answer

Data may be entered into the ecommerce system by multiple users such as administrators, vendors, and customers. The programmer may design the system to include input forms and data validation, but they are not the sole source of data entry.

Question 8

What is a simple sequence code? Give an example of how this code could be used.

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Question 9

Value checks are usually performed for any data.

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Question 10

Ensuring the quality of the data input to the information system is critical to ensuring quality output.

Accepted Answer

The accuracy, completeness, and consistency of the data input directly impact the quality of the information system's output. Poor quality input results in poor quality output, which can have negative consequences for decision-making and business operations. Hence, ensuring the quality of data input is critical.

Question 11

Bar codes appear on any person or object that needs to be checked into and out of any kind of inventory system.

Accepted Answer

Bar codes are commonly used in inventory systems to keep track of items and their movements. They can be found on items such as products, library books, and even employee badges.

Question 12

An XML DTD is much more powerful than a schema.

Accepted Answer

This statement is actually false. XML Schema is much more powerful than DTD because it can define more complex data types and provides more flexibility in defining element and attribute constraints. It also supports namespaces, which DTD does not.

Question 13

A pattern that contains symbols that represent the type of data that must be present in a field is called a regular expression .

Accepted Answer

This statement is true. Regular expressions are commonly used in programming to match and validate strings based on a pattern that contains symbols representing the expected format of the data.

Question 14

There are three main problems that can occur with input transactions: submitting the wrong data to the system,submission of data by an unauthorized person,or asking the system to perform an unacceptable function.

Accepted Answer

These are indeed the three main problems that can occur with input transactions.

Question 15

XML documents may be validated by comparing them to a DTD or a schema.

Accepted Answer

Validation of XML documents can be done using either a DTD or a schema.

Question 16

A method for validating credit cards uses a check digit formula called the Kendall formula.

Accepted Answer

The check digit formula for validating credit cards is called the Luhn algorithm. The Kendall formula is a statistical method used in biology and social sciences.

Question 17

List the four objectives that a systems analyst can use to support accurate data entry.

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Question 18

Use the stored data system to prevent the mistake that the intended number 53411 is typed in as number 54311 instead.

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Question 19

A value check is used when one element has a relationship with another one.

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Question 20

Radio frequency identification allows the automatic collection of data using tags or transponders that contain a chip and an antenna.

Accepted Answer

RFID technology uses tags or transponders that contain a chip and an antenna to automatically collect data.

Quiz 15: Designing Accurate Data Entry Procedures