Who invented the relational database management model (RDBMS), organizing data into structured rows and tables? MCQ with Answer and Explanation

Question
Who invented the relational database management model (RDBMS), organizing data into structured rows and tables?
A. Bill Gates
B. Edgar F. Codd
C. Alan Turing
D. Larry Ellison
Answer: Option B
Solution (By JKSSB Mock Tests)
Edgar F. Codd formulated the structural relational database design theory while working at IBM in 1970.
This question belongs to: Static General Knowledge Inventions and Discoveries
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Question #1
Who discovered that blood can be categorized into various Rh factors (positive and negative)?
A. Edward Jenner
B. Karl Landsteiner and Alexander Wiener
C. Robert Koch
D. William Harvey
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Correct Answer: Option B

Explanation:
Karl Landsteiner and Alexander S. Wiener discovered the Rhesus (Rh) factor in blood in 1937.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #2
The invention of the common mechanical rotary print engine that accelerated newspaper publishing was patented by whom?
A. Johannes Gutenberg
B. Christopher Sholes
C. William Caxton
D. Richard March Hoe
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Correct Answer: Option D

Explanation:
Richard March Hoe invented the rotary type press in 1843, placing text matrices on revolving drums rather than flat tables.
This question belongs to: Static General Knowledge Inventions and Discoveries
Question #3
Who invented the multi-matrix code known as the QR (Quick Response) Code in 1994?
A. Norman Joseph Woodland
B. Alan Turing
C. Masahiro Hara
D. Tim Berners-Lee
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Correct Answer: Option C

Explanation:
Masahiro Hara from the Japanese company Denso Wave invented the QR code in 1994 to track automobile components during assembly.
This question belongs to: Static General Knowledge Inventions and Discoveries
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