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
221
Which of the following is an example of an output device?
Answer:
Printer
** An output device is any piece of hardware that is used to present the results of data processing to the user. A printer produces a hard copy of documents.
222
**In computer networking, the speed of data transfer is often measured in:**
Answer:
Bits per second (bps)
** Network speeds, such as internet connection speeds, are measured by the number of bits that can be transmitted from one point to another in one second.
223
A digital watch is an example of a:
Answer:
Digital computer
** A digital watch uses a digital circuit to keep track of time and displays it as discrete numbers. This makes it a simple, specialized form of a digital computer.
224
Computer systems used for weather forecasting are typically:
Answer:
Supercomputers
** Weather forecasting requires the processing of vast amounts of atmospheric data and the running of complex simulation models, which can only be done on the most powerful supercomputers.
225
The physical components of a computer system are referred to as:
Answer:
Software
** Hardware refers to the tangible, physical parts of a computer, such as the CPU, memory, storage devices, and peripherals. It is the platform on which the software runs.
226
What primarily distinguishes a mainframe from a supercomputer?
Answer:
Supercomputers prioritize executing a few programs quickly, whereas mainframes utilize their power for concurrent execution of multiple programs
The core difference lies in their design philosophy. Supercomputers are built for maximum processing speed on a single, complex task (like weather forecasting). Mainframes are designed for high reliability and throughput, capable of processing a massive number of simultaneous transactions and user requests (like in banking systems).
227
The first supercomputer, the CDC 6600, was designed by:
Answer:
Seymour Cray
** Seymour Cray is known as the "father of supercomputing." He designed a series of the fastest computers in the world, including the CDC 6600 and the Cray-1.
228
Which device is digital in nature?
Answer:
Digital Clock
Digital devices represent information using discrete values, typically binary digits (0s and 1s). A digital clock displays time using numbers, which is a discrete representation. In contrast, an analog speedometer and a clock with hands use continuous movement to represent values, making them analog devices.
229
1 PB (Petabyte) is equal to:
Answer:
1024 TB
** A petabyte is the next unit of data storage after terabyte. In the binary system, 1 petabyte is equal to 1,024 terabytes.
230
A group of 8 bits is called a:
Answer:
Byte
** A byte is a standard unit of digital information that consists of 8 bits. It is the amount of memory needed to store a single character of text in ASCII.