Computer Science MCQs – Page 10 (Q91-100)

FORTRAN, short for Formula Translation, is correctly identified as the first widely used high-level programming language, developed by IBM in the 1950s primarily for scientific and engineering computing that required complex mathematical calculations. It allowed programmers to write instructions using more human-readable formulas and syntax rather than raw machine code, greatly improving productivity and reducing errors. FORTRAN remains in use today, particularly in high-performance computing fields like climate modeling, physics simulations, and computational fluid dynamics, due to its efficiency with numerical operations. Its introduction marked a major milestone in programming language history, paving the way for later high-level languages like COBOL, BASIC, and eventually modern languages like C and Python.

COBOL, which stands for Common Business-Oriented Language, was correctly designed primarily for business data processing tasks such as payroll, inventory management, and financial transactions, emphasizing readability with English-like syntax rather than complex mathematical notation. Developed in the late 1950s and early 1960s with significant input from Grace Hopper, COBOL became especially popular in large enterprises, banks, and government institutions that needed to process massive volumes of records reliably. Despite being decades old, COBOL code still runs many critical legacy systems today, particularly in the banking and insurance industries, creating ongoing demand for programmers who can maintain it. Its emphasis on business logic distinguishes it from scientific-computing languages like FORTRAN, which focus on numerical and mathematical operations.

Grace Hopper is correctly credited as a key figure in developing COBOL, contributing her expertise in compiler technology and her vision that programming languages should resemble readable English rather than obscure numeric codes. Her earlier work on the FLOW-MATIC language directly influenced COBOL's design, helping establish business-oriented, English-like syntax as a practical approach for enterprise software. COBOL, standardized in 1959, went on to become one of the most widely used programming languages in corporate and government computing for decades. Hopper's broader legacy includes pioneering compiler design and popularizing the term 'debugging,' cementing her reputation as one of the most influential figures in early computer science.

The term 'bug' in computing is famously traced to an incident in 1947 when a moth was found trapped in a relay of the Harvard Mark II computer, causing a malfunction that operators, including Grace Hopper's team, documented by taping the moth into the logbook with the note 'first actual case of bug being found.' While the word 'bug' had been used informally to describe technical glitches even before this event, dating back to Thomas Edison's writings, this incident became the most famous and often-cited origin story due to the physical evidence preserved in the logbook. Today, a 'bug' refers to any error or flaw in software that causes it to behave unexpectedly. The process of finding and fixing such bugs is known as debugging, a term whose popularization is often credited to Hopper herself.

Grace Hopper is correctly credited as the person often associated with popularizing the term 'debugging,' stemming from the famous 1947 incident when a real moth was found causing a malfunction in the Harvard Mark II computer's relay. Although the concept of a 'bug' as a technical flaw predates this event, Hopper's team's documentation of the moth incident became the enduring, widely told story behind the term's popular usage in computing. Debugging today refers to the systematic process of identifying, isolating, and fixing errors in software code, an essential skill for every programmer. Hopper's broader contributions, including her work on compilers and COBOL, established her as one of the most significant pioneers in the history of computer science.

The first computer virus is correctly traced back to the 1970s-1980s, with early examples like the Creeper program in 1971, an experimental self-replicating program on ARPANET, and the Elk Cloner virus in 1982, which spread via floppy disks on Apple II computers. These early viruses were often more experimental or mischievous than maliciously destructive compared to modern malware, which can steal data, encrypt files for ransom, or damage systems extensively. The term 'computer virus' itself was formally coined by researcher Fred Cohen in 1983, drawing an analogy to biological viruses that replicate and spread. As personal computers and networks became more widespread through the 1980s and 1990s, the sophistication and prevalence of malicious software grew substantially, giving rise to the modern cybersecurity industry.

Software Arts is correctly credited with developing VisiCalc, released in 1979 as the first commercially successful spreadsheet software, created by Dan Bricklin and Bob Frankston. VisiCalc is often cited as the first 'killer app' for personal computers, since it gave businesses a compelling practical reason to purchase an Apple II, dramatically boosting personal computer sales. Its grid-based interface, allowing users to enter formulas that automatically recalculated when data changed, established the fundamental spreadsheet paradigm still used in programs like Microsoft Excel and Google Sheets today. VisiCalc's success demonstrated the immense commercial potential of application software, helping to launch the broader personal computer software industry.

Microsoft Windows was correctly first released in the 1980s, specifically in 1985, initially as a graphical extension running on top of the existing MS-DOS operating system rather than a fully independent operating system. Early versions offered a graphical user interface with windows, icons, and mouse support, though it took several iterations before Windows achieved widespread commercial success, particularly with Windows 3.0 in 1990. Windows eventually became the dominant operating system for personal computers worldwide, evolving through landmark versions like Windows 95, XP, 7, 10, and 11. This decades-long dominance has made basic Windows proficiency a standard expectation in most offices and educational institutions today.

Microsoft Windows 1.0, the first version of the operating system, was correctly released in 1985, offering a graphical interface with overlapping windows, drop-down menus, and mouse support layered on top of MS-DOS. Though it received a lukewarm reception due to limited software support and modest hardware capabilities at the time, it represented Microsoft's first major step toward the graphical operating systems that would come to dominate personal computing. Windows continued to evolve through the late 1980s and 1990s, with each version adding features and improving stability and performance. This early release laid the foundation for Microsoft's eventual dominance of the desktop operating system market for decades to come.

Linus Torvalds is correctly credited with creating the Linux kernel, which he began developing in 1991 as a student in Finland, releasing it as free and open-source software that programmers worldwide could study, modify, and improve. Linux became the foundation for a vast ecosystem of operating system distributions, such as Ubuntu, Fedora, and Debian, and today powers the majority of the world's servers, supercomputers, and Android smartphones. Unlike proprietary systems like Windows or macOS, Linux's open-source nature allows anyone to inspect its source code, contributing to its reputation for security, stability, and customizability. Torvalds continues to oversee the kernel's development, coordinating contributions from thousands of developers globally through a collaborative open-source model.