Modern Tech — Set 5
Inventions · आधुनिक तकनीक · Questions 41–50 of 60
Who is known for inventing the first mechanical calculator, the 'Pascaline'?
Correct Answer: D. Blaise Pascal
Blaise Pascal built the calculator in 1642 to help his father with tax calculations. It could perform addition and subtraction through a series of gears and wheels. This was one of the earliest steps toward automated computing.
Which company introduced the first 3D printer in 1984?
Correct Answer: C. 3D Systems
Chuck Hull, the founder of 3D Systems, invented stereolithography, the first 3D printing process. It allowed solid objects to be created from digital data layer by layer. This technology has revolutionized manufacturing and prototyping.
Who is the inventor of the first practical wireless telegraph system?
Correct Answer: B. Guglielmo Marconi
Marconi developed the first long-distance radio transmission system in the late 1890s. He successfully sent a signal across the Atlantic Ocean in 1901. His work earned him the Nobel Prize in Physics.
In which decade was the first computer mouse invented?
Correct Answer: B. 1960s
The correct answer is '1960s'. Douglas Engelbart invented the first prototype of the mouse in 1964. It was made of wood and had only one button. It was not until the 1980s that it became a standard part of personal computers.
What is the full form of the term 'Wi-Fi', popularized as a technology name?
Correct Answer: D. Wireless Fidelity
The term Wi-Fi was created by a branding firm to be a catchier name for the IEEE 802.11 technology. It is a play on the term 'Hi-Fi' used in audio equipment. It has become synonymous with wireless internet access everywhere.
Who invented the first modern internal combustion engine fueled by gasoline?
Correct Answer: A. Karl Benz
Karl Benz patented the three-wheeled Motorwagen in 1886. This invention is widely regarded as the first true automobile. It utilized a four-stroke engine that he designed himself.
Which company produced the first commercial GUI-based computer, the Lisa?
Correct Answer: D. Apple
Apple released the Lisa in 1983, which featured icons and a mouse-driven interface. Though expensive and not a commercial success, it influenced the design of the Macintosh. It moved computing away from text-based command lines.
Who is the primary creator of the 'C++' programming language?
Correct Answer: C. Bjarne Stroustrup
Bjarne Stroustrup developed C++ at Bell Labs as an extension of the C language. It added object-oriented features while maintaining the efficiency of C. It is a foundational language for game development and systems programming.
Which year was the first commercial portable computer, the Osborne 1, released?
Correct Answer: A. 1981
The correct answer is '1981'. The Osborne 1 weighed about 11 kilograms and featured a 5-inch screen. It was designed to be carried like a suitcase and was very popular among professionals. It proved there was a significant market for mobile computing.
Who invented the first portable battery-powered hearing aid in 1902?
Correct Answer: C. Miller Reese Hutchison
Miller Reese Hutchison created the Acousticon, which was the first electric hearing aid. He was also a prolific inventor who worked closely with Thomas Edison. His invention provided a vital solution for people with hearing loss.