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
2561
Which of these computer types is defined more by its function (multi-user, high-volume transactions) than its raw processing speed?
Answer:
Supercomputer
** While mainframes are powerful, their defining characteristic is their ability to handle massive input/output operations and support thousands of users reliably, rather than their raw calculation speed (which is the domain of supercomputers).
2562
Which characteristic of a computer allows it to store and retrieve large amounts of data?
Answer:
Storage capacity
** Computers have the ability to store vast amounts of data in a very small physical space. This data can be accessed quickly and easily whenever needed. Storage devices like hard drives, SSDs, and cloud storage exemplify this characteristic.
2563
**In terms of processing, a key difference between a mainframe and a server is:**
Answer:
Mainframes have a more robust architecture for high-volume, reliable transaction processing
** While modern servers are very powerful, mainframes are specifically designed with extensive I/O capabilities and features for resilience and security, making them ideal for mission-critical enterprise-level processing.
2564
A digital computer works on the principle of:
Answer:
Binary arithmetic
** The foundation of all digital computing is the binary number system and the rules of binary arithmetic. All operations, from simple addition to complex data processing, are ultimately performed using binary logic.
2565
The computer you are most likely to find in your home or office is a:
Answer:
Microcomputer
** Microcomputers, also known as personal computers (PCs), are the most common type of computer. This category includes desktops, laptops, tablets, and smartphones.
2566
The evolution from mainframe to microcomputer represents a shift towards:
Answer:
Centralized computing
** The mainframe era was characterized by centralized computing, where a single large computer served many users with "dumb" terminals. The rise of the microcomputer led to a decentralized model, with processing power distributed among individual PCs and servers.
2567
The ability to connect computers together to share information and resources is an extension of which characteristic?
Answer:
Versatility
** While not always listed as a primary characteristic, connectivity is a crucial aspect of modern computing. It is an extension of versatility, as it allows computers to perform a wider range of tasks by interacting with other systems.
2568
**What technology allows for contactless payments, a common computer application in modern banking and retail?**
Answer:
Near Field Communication (NFC)
** NFC is a set of communication protocols that enables two electronic devices, one of which is usually a portable device such as a smartphone, to establish communication by bringing them within 4 cm of each other.
2569
What does a sequence of 8 binary digits (bits) form?
Answer:
Byte
A byte is a standard unit of digital information in computing and telecommunications. It consists of a sequence of 8 bits (binary digits). This grouping is the basic addressable element in many computer architectures.
2570
A GUI stands for:
Answer:
Graphical User Interface
** A GUI is a type of user interface that allows users to interact with electronic devices through graphical icons and visual indicators, as opposed to text-based interfaces. It makes computers much easier to use.