Computer Science/IT MCQs
Topic Notes: Computer Science/IT
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
451
What organization is the main international standards body for the World Wide Web?
Answer:
B) The Internet Engineering Task Force (IETF)
The World Wide Web Consortium (W3C), founded and led by Tim Berners-Lee, is an international community where member organizations, a full-time staff, and the public work together to develop web standards.
452
The Java programming language was developed with the slogan "Write Once, Run Anywhere," referring to its:
Answer:
Platform independence via the Java Virtual Machine
Java, developed by James Gosling at Sun Microsystems, was designed to be platform-independent. Java code is compiled into bytecode that can run on any device equipped with a Java Virtual Machine (JVM), fulfilling the "Write Once, Run Anywhere" promise.
453
Which historical figure is widely credited with conceiving the fundamental principles upon which modern digital computers are built?
Answer:
Charles Babbage
Charles Babbage, a brilliant English mathematician and inventor from the 19th century, is often called the 'Father of the Computer.' His groundbreaking designs for the Difference Engine and, more notably, the Analytical Engine, laid the conceptual groundwork for modern computers. The Analytical Engine, though never fully constructed during his lifetime, described core architectural components such as a 'mill' (arithmetic logic unit), a 'store' (memory), and methods for input/output and conditional branching, predating many ideas later developed in the 20th century. While individuals like Alan Turing (for theoretical computer science and AI), Ada Lovelace (for programming Babbage's machines), and John von Neumann (for the stored-program concept) made crucial contributions, Babbage's vision established the foundational blueprint for a general-purpose programmable machine.
454
Which company successfully reverse-engineered the IBM PC's BIOS, leading to the creation of a huge market for "IBM-compatible" or "PC clone" computers?
Answer:
Compaq
Compaq was the first company to legally reverse-engineer the IBM PC's BIOS using a "clean room" design. The success of their Compaq Portable in 1983 opened the door for many other manufacturers to create computers that could run the same software as the IBM PC.
455
Which language, created by Bjarne Stroustrup, added object-oriented features to the C programming language?
Answer:
C++
Bjarne Stroustrup began developing "C with Classes" in 1979 at Bell Labs, which later evolved into C++. It was designed to be a superset of C, adding powerful features like classes and objects while retaining C's efficiency.
456
What was the first widely used graphical web browser that popularized the World Wide Web?
Answer:
Mosaic
NCSA Mosaic, developed at the National Center for Supercomputing Applications and released in 1993, was the first web browser to display images in-line with text instead of in a separate window. Its user-friendly interface made the web accessible to non-technical people.
457
Which of the following was the primary electronic component used in first-generation computers?
Answer:
Vacuum Tubes
First-generation computers, from 1940 to 1956, relied on vacuum tubes for circuitry and magnetic drums for memory. These components were bulky, generated a lot of heat, and were prone to frequent failure.
458
The term "surfing the Internet" was popularized by:
Answer:
A computer magazine article
The phrase is often credited to librarian Jean Armour Polly, who published an article titled "Surfing the INTERNET" in the Wilson Library Bulletin in 1992.
459
Who is the primary creator of the Linux operating system kernel?
Answer:
Linus Torvalds
Linus Torvalds, a Finnish-American software engineer, created the Linux kernel and released its first version in 1991. It has since become the foundation for a vast number of operating systems, including Android.
460
Which of the following best describes John Napier's 'Napier's Bones,' a significant computational tool from the early 17th century?
Answer:
A set of rods used for simplifying multiplication and division through a system of partial products and sums.
John Napier's 'Napier's Bones,' invented in the early 17th century, was a manual calculating device. It consisted of a set of nine rods, often made of wood, bone, or ivory, with multiplication tables inscribed on their faces. By arranging these rods appropriately, users could perform multiplication and division operations by breaking them down into simpler addition and subtraction steps. The 'bones' did not use electronic circuitry (ruling out option A) and were distinct from optical instruments (ruling out option C) and the abacus (ruling out option D). Its primary function was to facilitate complex arithmetic calculations by hand, making it a critical historical tool in the development of computing.