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
21
What is a 'Region' in cloud computing terminology?
Answer:
A geographically isolated location where a cloud provider hosts its data centers.
A cloud region is a specific geographical location where a cloud provider has multiple data centers (Availability Zones). Regions are designed to be independent of each other to offer greater fault tolerance and stability.
22
Which of the following is a key characteristic of cloud computing?
Answer:
On-demand self-service.
On-demand self-service allows users to provision computing capabilities, such as server time and network storage, as needed automatically without requiring human interaction with each service provider.
23
Which of these is NOT a characteristic of cloud computing as defined by NIST?
Answer:
Resource segregation.
The five essential characteristics of cloud computing, according to the NIST definition, are on-demand self-service, broad network access, resource pooling, rapid elasticity, and measured service. Resource segregation is not listed as a primary characteristic.
24
What is the essential function of a 'firewall' in a cloud network?
Answer:
To monitor and control incoming and outgoing network traffic based on predetermined security rules.
A firewall acts as a security barrier, inspecting network traffic and enforcing security policies to prevent unauthorized access and protect cloud resources from cyber threats.
25
Which of the following is an example of Software as a Service (SaaS)?
Answer:
Microsoft Office 365.
SaaS provides ready-to-use software applications over the internet. Microsoft Office 365 is a prime example where users access productivity software without managing the underlying infrastructure or platform.
26
What is the primary advantage of serverless computing?
Answer:
It allows developers to write code without needing to provision or manage servers.
Serverless computing allows developers to build and run applications and services without having to manage infrastructure. The cloud provider automatically provisions, scales, and manages the infrastructure required to run the code.
27
A company wants to migrate its legacy applications to the cloud gradually, maintaining some on-premise infrastructure while leveraging cloud resources. What is the most suitable deployment model?
Answer:
Hybrid Cloud.
A hybrid cloud allows organizations to integrate their existing on-premise infrastructure with public or private cloud services, enabling a gradual migration and leveraging the benefits of both environments.
28
Which of the following is a potential disadvantage of cloud computing?
Answer:
Vendor lock-in and dependency.
Vendor lock-in is a significant concern where customers may find it difficult to switch cloud providers due to proprietary technologies, data formats, or service integrations.
29
Which security concern is specifically heightened in a multi-tenant cloud environment?
Answer:
Isolation of customer data.
In a multi-tenant environment, multiple customers share the same underlying hardware infrastructure. Ensuring strict isolation of each customer's data and applications from others is a critical security challenge.
30
What is the 'shared responsibility model' in cloud computing?
Answer:
The cloud provider manages the 'security of the cloud' while the customer is responsible for 'security in the cloud'.
The shared responsibility model dictates that the cloud provider is responsible for the security of the underlying cloud infrastructure, while the customer is responsible for securing their data, applications, and operating systems within the cloud.