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
5391
Which primary application domain was the programming language COBOL specifically engineered to address?
Answer:
Commercial data management and administrative applications
COBOL, an acronym for Common Business-Oriented Language, was conceived in 1959 with a clear objective: to create a programming language optimized for business and administrative tasks. Its design prioritized readability and ease of maintenance, mimicking natural English to facilitate its use by non-programmers in business settings. Consequently, it became the predominant language for developing large-scale business applications on mainframe systems, especially within financial institutions, government agencies, and other organizations requiring robust data processing for payroll, inventory, and accounting. Options A, B, and D represent different computing domains for which other languages were more specifically designed (e.g., Fortran for scientific, C/Assembly for systems, Ada/C for real-time/embedded).
5392
Which historical figure is widely recognized for conceptualizing the foundational principles of what would become the modern digital computer?
Answer:
Charles Babbage
Charles Babbage is universally acknowledged as the 'Father of the Computer.' His pioneering work in the 19th century led to the design of the Difference Engine, an automatic mechanical calculator, and more importantly, the Analytical Engine. The Analytical Engine was a revolutionary design that incorporated many features found in modern computers, including a programmable processing unit (the 'mill'), memory (the 'store'), and input/output mechanisms. Although he was unable to fully build his designs due to technological limitations of his era, his theoretical contributions laid the groundwork for future computer development. Alan Turing, while a pivotal figure in theoretical computer science and artificial intelligence (Turing Machine), came much later. Bill Gates and Steve Jobs are contemporary figures known for their contributions to software and personal computing, respectively, not for the foundational conceptualization of the computer itself.
5393
For which significant late 19th-century undertaking did Herman Hollerith invent his groundbreaking punched-card tabulating machine?
Answer:
The 1890 United States Census
Herman Hollerith's innovative electromechanical tabulating machine, utilizing punched cards for data entry and processing, was specifically conceived and developed to address the monumental challenge of tabulating the 1890 United States Census. The previous 1880 census had taken over seven years to process manually, prompting a need for a more efficient system. Hollerith's invention dramatically reduced the processing time for the 1890 census to just two and a half years, demonstrating its immense value. His company, which was founded to commercialize this technology, eventually evolved through mergers into what is known today as International Business Machines (IBM).
5394
Fifth-generation computers are primarily characterized by their focus on:
Answer:
Artificial Intelligence
Fifth-generation computing, which is still in development, is based on the concept of artificial intelligence. The goal is to create devices that are capable of learning, self-organization, and responding to natural language input.
5395
Which pioneering technology company, co-founded by Steve Wozniak and Steve Jobs, introduced its inaugural product, the Apple I personal computer, to the market in 1976?
Answer:
Apple Computer, Inc.
The question specifically asks for the company founded by Steve Wozniak and Steve Jobs that launched the Apple I in 1976. This description directly points to Apple Computer, Inc. (now Apple Inc.). Steve Wozniak designed and hand-built the Apple I, a circuit board kit, and Steve Jobs handled the marketing and business aspects. The success of the Apple I paved the way for the official incorporation of Apple Computer, Inc. in April 1976 and the subsequent development of the more user-friendly and commercially successful Apple II. Microsoft was founded by Bill Gates and Paul Allen, IBM is a much older company, and Commodore International was a competitor in the personal computer market.
5396
Prior to establishing MS-DOS as the foundational operating system for the IBM Personal Computer, Microsoft acquired and subsequently modified which operating system?
Answer:
QDOS (Quick and Dirty Operating System)
When IBM approached Microsoft to provide an operating system for their upcoming Personal Computer, Microsoft did not have a suitable OS readily available. Instead of developing one from scratch, they strategically purchased the rights to an operating system called QDOS (Quick and Dirty Operating System) from Seattle Computer Products (SCP). This OS, developed by Tim Paterson, was notably similar in its command structure and API to CP/M, which was a dominant OS at the time. Microsoft then refined and rebranded QDOS as MS-DOS (Microsoft Disk Operating System) and licensed it to IBM, thus laying the groundwork for its widespread adoption and Microsoft's ascent in the software industry. While CP/M was a contemporary and influential OS, and Unix/Xenix were other significant operating systems, QDOS was the specific system Microsoft acquired and transformed.
5397
Which of the following computer generations is currently in an active phase of research and development, focusing on advanced artificial intelligence and intelligent systems?
Answer:
Fifth Generation
The Fifth Generation of computers is characterized by its reliance on Artificial Intelligence (AI), parallel processing, and supercomputers to create systems that can learn, reason, and make decisions in a human-like manner. While significant advancements in AI have been made, particularly in areas like machine learning and natural language processing, the full realization of truly intelligent, self-organizing, and adaptive fifth-generation computing systems is still an ongoing and active area of research and development worldwide. Earlier generations (First, Third, and Fourth) represent established periods in computer history with defined technological bases like vacuum tubes, integrated circuits, and microprocessors, respectively, and are not 'under development' in the same future-oriented sense.
5398
Which influential figure is widely recognized for establishing the fundamental theoretical principles that underpin modern computer science and artificial intelligence?
Answer:
Alan Turing
Alan Turing is universally acknowledged as the 'father of theoretical computer science and artificial intelligence.' His seminal work in the 1930s introduced the concept of the Turing machine, a mathematical model of computation that formalized the ideas of algorithms and computability. This theoretical framework laid the groundwork for the development of programmable computers. Additionally, his contributions to the field of artificial intelligence, particularly his famous 'Turing Test,' provided a foundational challenge for evaluating machine intelligence. While Bill Gates, Steve Jobs, and Mark Zuckerberg are significant figures in the modern computing industry and technology, their contributions are primarily in software development, personal computing, and social media, respectively, rather than the foundational theoretical underpinnings of the field.
5399
In 1977, a pivotal year for home computing, which of the following machines completed the iconic 'trinity' of early personal computers, alongside the Apple II and the Commodore PET?
Answer:
TRS-80
The '1977 Trinity' refers to three groundbreaking personal computers that were introduced in that year, marking the beginning of the home computer era. These machines were the Apple II, the Commodore PET (Personal Electronic Transactor), and the Tandy/Radio Shack TRS-80. While the Altair 8800 (1975) was an early and influential microcomputer kit, and the IBM PC (1981) and Xerox Alto (1973) were significant in their own right, only the TRS-80 was part of this specific trio of mass-produced, user-friendly computers launched to the public in 1977. The TRS-80, sold through Radio Shack, was particularly successful due to its accessibility and affordability, making personal computing a reality for many consumers.
5400
Which computer scientist is credited with introducing the foundational concept of the 'relational model' for database management systems, significantly influencing the design of modern databases?
Answer:
Edgar F. Codd, who published the seminal paper on the relational model in 1970.
Edgar F. Codd, while working at IBM, published his groundbreaking paper 'A Relational Model of Data for Large Shared Data Banks' in 1970. This paper introduced the concept of organizing data into simple tables (relations) with well-defined relationships, along with a theoretical framework based on set theory and predicate logic. This relational model offered significant advantages in data independence, flexibility, and query capabilities compared to previous hierarchical and network models, ultimately becoming the universally accepted standard for the design and implementation of modern database management systems (DBMS).