Computer Pioneers — Set 3
Inventions · कंप्यूटर अग्रदूत · Questions 21–30 of 50
Who is credited with inventing the first e-mail system on the ARPANET in 1971?
Correct Answer: D. Ray Tomlinson
• **Ray Tomlinson** = Ray Tomlinson chose the '@' symbol to separate the user's name from the machine's name for the first e-mail system. • **1971** — Ray Tomlinson invented the first e-mail system on the ARPANET, sending the first network email between two computers. • 💡 Wrong-option analysis: Bob Kahn: co-developed TCP/IP protocols; Larry Roberts: developed ARPANET; Vint Cerf: co-developed TCP/IP and is known as 'Father of the Internet'.
Which pioneer led the development of the Macintosh and the user-friendly Graphical User Interface (GUI)?
Correct Answer: A. Steve Jobs
• **Steve Jobs** = Steve Jobs led the development of the Macintosh and the user-friendly Graphical User Interface (GUI). • **1984** — Steve Jobs integrated the mouse and windows into the Macintosh, making computers accessible to non-technical users. • 💡 Wrong-option analysis: Bill Gates: co-founder of Microsoft; Xerox Parc: developed early GUI concepts but did not commercialize them as Apple did; Larry Page: co-founder of Google.
Who is known as the 'Father of Supercomputing' for designing the fastest computers of his era?
Correct Answer: A. Seymour Cray
• **Seymour Cray** = Seymour Cray is known as the 'Father of Supercomputing' for designing the fastest computers of his era. • **Cray-1** — Seymour Cray designed the Cray-1, and his machines were used for complex tasks like weather forecasting and nuclear research. • 💡 Wrong-option analysis: Gordon Moore: known for 'Moore’s Law'; Vannevar Bush: conceptualized the 'Memex'; Gene Amdahl: known for Amdahl's Law in computer architecture.
Which computer pioneer is the creator of the Python programming language?
Correct Answer: C. Guido van Rossum
• **Guido van Rossum** = Guido van Rossum is the creator of the Python programming language. • **1991** — Guido van Rossum released Python with an emphasis on code readability and simplicity. • 💡 Wrong-option analysis: Larry Wall: created the Perl programming language; Yukihiro Matsumoto: created the Ruby programming language; Rasmus Lerdorf: created the PHP programming language.
Who co-authored the TCP/IP protocols and is often called the 'Father of the Internet'?
Correct Answer: A. Vint Cerf
• **Vint Cerf** = Vint Cerf co-authored the TCP/IP protocols, which are the communication standards that allowed different networks to connect. • **TCP/IP protocols** — Vint Cerf and Bob Kahn designed these communication standards, providing the technical architecture for the global internet. • 💡 Wrong-option analysis: Ted Nelson: coined the terms 'hypertext' and 'hypermedia'; Tim Berners-Lee: invented the World Wide Web; Paul Baran: a pioneer in packet switching research.
Which pioneer developed the first spreadsheet program, VisiCalc?
Correct Answer: A. Dan Bricklin
• **Dan Bricklin** = Dan Bricklin co-created VisiCalc, the first spreadsheet program, which turned the personal computer into a vital business tool. • **1979** — Dan Bricklin co-created VisiCalc, which is often cited as the first 'killer app' for the Apple II computer. • 💡 Wrong-option analysis: Mitch Kapor: co-founder of Lotus Development Corp.; Bill Atkinson: developed graphics for Apple Macintosh; John Warnock: co-founder of Adobe Systems.
Who invented the first programmable loom using punch cards, influencing early computer design?
Correct Answer: D. Joseph Marie Jacquard
• **Joseph Marie Jacquard** = Joseph Marie Jacquard invented the first programmable loom using punch cards, influencing early computer design. • **1804** — Joseph Marie Jacquard created a mechanical loom using punch cards, which was later adapted by Babbage for his Analytical Engine. • 💡 Wrong-option analysis: Herman Hollerith: developed punch card systems for the U.S. Census; Charles Babbage: designed the Analytical Engine, inspired by Jacquard; John Kay: invented the flying shuttle.
Which pioneer is known for 'Moore’s Law', predicting the growth of transistor density?
Correct Answer: D. Gordon Moore
• **Gordon Moore** = Gordon Moore is known for 'Moore’s Law', which predicts the growth of transistor density. • **1965** — Gordon Moore observed that the number of transistors on a chip doubles roughly every two years, guiding the semiconductor industry. • 💡 Wrong-option analysis: Andy Grove: former CEO of Intel; Arthur Rock: venture capitalist and early investor in Intel; Robert Noyce: co-founder of Intel.
Who invented the relational database model, which is the basis for SQL databases?
Correct Answer: C. E.F. Codd
• **E.F. Codd** = E.F. Codd invented the relational database model, which is the basis for SQL databases. • **1970** — E.F. Codd published a landmark paper describing how data could be organized into tables, revolutionizing information management. • 💡 Wrong-option analysis: Charles Bachman: developed the network data model; James Gosling: created the Java programming language; Larry Ellison: co-founder of Oracle, which commercialized relational databases.
Who is the pioneer behind the 'Memex' concept, an early vision for the internet and hypertext?
Correct Answer: D. Vannevar Bush
• **Vannevar Bush** = Vannevar Bush is the pioneer behind the 'Memex' concept, an early vision for the internet and hypertext. • **1945** — Vannevar Bush wrote 'As We May Think', proposing a device to store and link all human knowledge. • 💡 Wrong-option analysis: Ted Nelson: coined the terms 'hypertext' and 'hypermedia'; Douglas Engelbart: invented the computer mouse and developed early hypertext systems; J.C.R. Licklider: envisioned an 'intergalactic computer network'.