The invention of the barcode system for scanning retail merchandise was patented by whom? MCQ with Answer and Explanation

Question
The invention of the barcode system for scanning retail merchandise was patented by whom?
A. Douglas Engelbart
B. Norman Joseph Woodland and Bernard Silver
C. Masahiro Hara
D. Alan Turing
Answer: Option B
Solution (By JKSSB Mock Tests)
Woodland and Silver patented the bullseye and linear barcode design in 1952, inspired by Morse code tracking patterns.
This question belongs to: Static General Knowledge Inventions and Discoveries
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Question #1
The invention of the common electronic operating layout known as the Graphical User Interface (GUI) was pioneered by which lab?
A. Microsoft
B. Xerox PARC
C. Apple Computers
D. IBM Research
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Correct Answer: Option B

Explanation:
Xerox Palo Alto Research Center (PARC) engineered the Alto computer featuring mouse-driven windows, menus, and file icons.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
The invention of the common domestic non-stick cookware surface pan coating was developed using which material?
A. Nylon
B. Kevlar
C. Bakelite
D. PTFE (Teflon) by Marc Grégoire
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Correct Answer: Option D

Explanation:
French engineer Marc Grégoire developed the process to bond Teflon to aluminum pan matrices, founding the Tefal brand.
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Question #3
Who discovered that certain types of biological fungal spores prevent bacterial cell wall cross-linking, identifying Penicillin's mechanism?
A. Robert Koch
B. Alexander Fleming
C. Louis Pasteur
D. Howard Florey and Ernst Chain
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Correct Answer: Option D

Explanation:
While Fleming discovered penicillin, Florey and Chain isolated and purified the molecule for medical treatment, sharing the 1945 Nobel Prize.
This question belongs to: Static General Knowledge Inventions and Discoveries
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