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
1
Which cloud computing characteristic enables continuous delivery and deployment?
Answer:
Automation and rapid elasticity.
Automation of infrastructure provisioning, testing, and deployment, combined with the rapid elasticity of cloud resources, are foundational for implementing continuous delivery and deployment (CI/CD) pipelines.
2
Which of the following describes the 'broad network access' characteristic of cloud computing?
Answer:
Capabilities are available over the network and accessed through standard mechanisms.
Broad network access means that capabilities are available over the network and accessed through standard mechanisms that promote use by heterogeneous thin or thick client platforms (e.g., mobile phones, laptops, and PDAs).
3
What does 'multi-cloud' strategy entail?
Answer:
Using multiple cloud computing and storage services in a single heterogeneous architecture to avoid vendor lock-in or leverage specific services.
A multi-cloud strategy involves distributing applications and data across several public cloud environments from different providers. This approach can improve resilience, avoid vendor lock-in, and allow organizations to choose the best services for specific workloads.
4
Which of the following offers the highest level of abstraction to the end-user?
Answer:
SaaS.
SaaS abstracts away the most layers, providing a fully managed application that users can simply consume. Users do not concern themselves with any underlying infrastructure, platform, or even application maintenance.
5
What is the main driver for adopting cloud computing for many enterprises?
Answer:
Cost savings, scalability, and business agility.
Enterprises adopt cloud computing primarily for its ability to reduce operational costs, offer scalable resources to meet fluctuating demands, and increase business agility through faster deployment and innovation cycles.
6
What is cloud computing?
Answer:
Using a network of remote servers hosted on the Internet to store, manage, and process data, rather than a local server or a personal computer.
Cloud computing involves using remote servers over the internet to handle data storage, management, and processing, offering scalability and accessibility beyond local hardware.
7
Which cloud security aspect is the customer typically responsible for in an IaaS model according to the shared responsibility model?
Answer:
Operating system updates and application configuration.
In an IaaS model, the customer is responsible for a significant portion of security, including operating system patches, application security, network configuration (e.g., firewalls), and data encryption.
8
What does PaaS typically provide to developers?
Answer:
A complete development and deployment environment.
PaaS offers a platform allowing customers to develop, run, and manage applications without the complexity of building and maintaining the infrastructure typically associated with developing and launching an app.
9
Which of the following is an open-source cloud computing platform that provides a flexible and scalable way to manage compute, storage, and networking resources?
Answer:
OpenStack.
OpenStack is a free, open-source software platform for cloud computing, mostly deployed as Infrastructure-as-a-Service (IaaS). It's widely used by public and private clouds for managing resources.
10
Which cloud characteristic implies that the cloud provider continuously monitors resource usage and provides transparent billing?
Answer:
Measured service.
Measured service is the cloud characteristic where cloud systems automatically control and optimize resource use by leveraging a metering capability at some level of abstraction appropriate to the type of service (e.g., storage, processing, bandwidth, and active user accounts). Resource usage can be monitored, controlled, and reported, providing transparency for both the provider and consumer.