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
191
**In daily life, social media platforms are an application of computers for:**
Answer:
Networking and communication
** Social media platforms like Facebook, Twitter, and Instagram use computer and internet technology to connect people and allow them to share information and communicate.
192
Which of the following is an example of a microcomputer?
Answer:
IBM System z
** An Apple iPad is a type of tablet computer, which falls under the broad category of microcomputers. The IBM System z is a mainframe, the Cray-1 was a famous supercomputer, and the PDP-8 was a popular minicomputer.
193
**The first generation of computers used what for circuitry?**
Answer:
Vacuum tubes
** The earliest computers, from the 1940s and 1950s, were massive machines that relied on vacuum tubes for processing and memory, which were bulky, unreliable, and generated a lot of heat.
194
Which statement is true about hybrid computers?
Answer:
They can process both continuous and discrete data.
** The key feature of a hybrid computer is its ability to handle both types of data. This makes them suitable for specialized applications where both forms of data are present and need to be processed together.
195
**What is the function of RAM (Random Access Memory)?**
Answer:
To provide temporary storage for data and programs that are currently being used by the CPU
** RAM is a volatile memory that the CPU uses to hold the data it is actively working on. The more RAM a computer has, the more data it can handle at once, improving performance.
196
The speed of a supercomputer is often measured in:
Answer:
Floating-point Operations Per Second (FLOPS)
** While processor speed is measured in GHz, the overall performance of supercomputers, which are used for scientific and engineering calculations, is often measured in FLOPS. This metric better reflects their ability to handle complex mathematical operations.
197
The set of instructions that tells the computer what to do is called:
Answer:
Hardware
** Software is a collection of programs, instructions, and data that enables a computer to perform specific tasks. It is the intangible part of the computer system that directs the hardware.
198
A device that can be both an input and an output device is a:
Answer:
Monitor
** A touchscreen is an input device because you can use it to provide commands to the computer by touching it. It is also an output device because it displays information to the user, just like a regular monitor.
199
The physical components of a computer that you can touch and see are called:
Answer:
Hardware
** Hardware refers to all the tangible parts of a computer system, such as the monitor, keyboard, mouse, CPU, and memory chips.
200
**A 'pixel' is the:**
Answer:
Smallest unit of a digital image or display that can be controlled
** A digital screen is made up of a grid of thousands or millions of pixels. The color and brightness of each pixel can be changed to create an image.