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
151
What is a collision domain?
Answer:
A network segment where data packets can collide
A collision domain is a part of a network where packet collisions can occur when two devices try to send data at the same time.
152
When one computer offers services to another, what is the setup called?
Answer:
Client/server
In a client/server model, a central computer (the server) provides data, services, or resources to other computers (the clients).
153
Which network type is best for a large, open-plan office?
Answer:
A hybrid network with both wired and wireless components
A hybrid approach is often best, providing wired connections for stationary devices like desktops and wireless access for laptops and mobile devices.
154
What is the main purpose of a packet's Time To Live (TTL) field?
Answer:
To prevent packets from circulating indefinitely in the network
The TTL is a value that is decremented by each router. If it reaches zero, the packet is discarded, which prevents routing loops from consuming all network resources.
155
Which device operates at the Network layer (Layer 3) of the OSI model?
Answer:
Router
A router operates at the Network layer and uses IP addresses to forward data between different networks.
156
Which device is a "dumb" device that doesn't make any decisions?
Answer:
Hub
A hub simply repeats signals without any intelligence or decision-making.
157
Which network requires each device to have a Network Interface Card (NIC)?
Answer:
?
All devices that connect to a network, whether wired or wireless, need a NIC (or a wireless adapter) to handle the communication.
158
Which of these is an example of circuit switching?
Answer:
Making a traditional landline phone call
The old telephone system works by creating a dedicated, end-to-end circuit for the duration of the call.
159
Which model is more suitable for applications that require high security and control?
Answer:
Client-server model
The centralized control of the client-server model is essential for applications that handle sensitive data, like banking or e-commerce.
160
What is a major disadvantage of the peer-to-peer model?
Answer:
Data backup and recovery are difficult.
Because data is stored on individual computers, there is no central backup, making data management and recovery a challenge.