# Flexible Manufacturing System Questions and Answers – AIDC – Barcode Technology

This set of Flexible Manufacturing System Multiple Choice Questions & Answers (MCQs) focuses on “AIDC – Barcode Technology”.

1. Which type of barcode is read using a linear sweep of the reader?
a) Arbitrary
b) Complex
c) Linear
d) Two-dimensional

Explanation: The type of barcode which can be read using a linear sweep is known as linear barcode. It is one of the most widely used data identification and data capture technique.

2. Which type of barcodes must be read in both directions?
a) Two-dimensional
b) Angular
c) Complex
d) Arbitrary

Explanation: The type of barcode which must be read in both directions is a two dimensional bar code. It cannot be accessed in a single sweep unlike the common barcodes used in shopping and other domestic applications.

3. Which type of barcodes consists of bars and spaces of varying width?
a) Width Modulated Barcodes
b) Height Modulated Barcodes
c) Area Modulated Barcodes
d) Length Modulated Barcodes

Explanation: The type of barcode which consists of bars and spaces of varying width is known as width modulated barcodes. It is one of the category of linear barcodes.

4. Which type of barcodes consists of evenly spaced bars of varying height?
a) Height Modulated Barcodes
b) Angular Barcodes
c) Width Modulated Barcodes
d) Modular Barcodes

Explanation: The type of barcodes which consists of evenly spaced bars of varying height is known as height modulated barcodes. It is generally termed as height modulated barcodes because it has the ability to read along a single sweep.

5. Which color does the bars are represented in barcodes?
a) Green
b) Black
c) Blue
d) Yellow

Explanation: The bars are usually represented in black color in bar codes. Green, Blue and yellow colors will not be used in bar codes.

6. What does the bars and spaces represent in barcodes?
a) Fingerprint
b) User Image
c) Item Image
d) Alphanumeric Characters

Explanation: Alphanumeric characters are usually represented in bars and spaces in bar codes. These are unique characters specific to single material and will be used for identification purpose.

7. The length of the bars and spaces are determined by the duration of the corresponding reflection signals in barcodes.
a) False
b) True

Explanation: The Width of the bars and spaces are determined by the duration of the corresponding reflection signals in barcodes. Width of bars and spaces will be taken as parameter for reading barcodes.

8. Which color does the space between the bars have in a typical barcode?
a) Green
b) White
c) Blue
d) Brown

Explanation: In barcodes, the space between bars will be white in color. Opposite colors will be given for high contrast.

9. Which emits a beam of light that will be swept past the bar code?
a) Holder
b) Scanner
c) Mouse
d) Handle

Explanation: In barcodes, scanner emits a beam of light that will be swept past the bar code. This can be done either manually or automatically. By sensing the light reflections, it can distinguish between the bars and spaces.

10. Which converts the spaces into electrical signal and bars into absence of electrical signal?
a) Spring
b) Photo detector
c) Pulley
d) Guided Wire

Explanation: In barcodes, Photo detector performs the function of converting the spaces into electrical signal and bars into absence of electrical signal. It is a specialized device for detecting light reflections.

11. What does UPC mean in terms of item identification?
a) Unique Product Code
b) Universal Product Code
c) United Poly Code
d) Unique Poly Code

Explanation: The abbreviated form of UPC is Universal Product Code. It is a standard code adopted by the grocery industry for item identification.

12. How many digit barcode does the UPC use?
a) 12
b) 1
c) 5
d) 7

Explanation: In Universal Product Code standard, 12 digit barcode will be used. In these 12 digits, six digits will be used to identify the manufacturer and five digits will be used to identify the product. The final character will be a check character.

13. Which type of barcode uses only 16 characters?
a) Coda bar
b) UPC
c) Code 39
d) Post net

Explanation: The type of barcode which uses only 16 characters is known as coda bar. It uses numerical characters from 0-9 and other specialized characters. It is generally used in libraries and blood banks.

14. Which type of barcode uses only numerical characters?
a) Coda bar
b) UPC
c) Code 25
d) Post net

Explanation: The type of barcode which uses only numerical characters is known as post net. It was popularly used in the United States postal service code for ZIP code numbers.

15. Code 128 is height modulated barcode.
a) False
b) True

Explanation: Code 128 is width modulated barcode. It is alphanumeric has higher density. It has also substituted some code 39 in some applications.

Sanfoundry Global Education & Learning Series – Flexible Manufacturing System.

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