Tag: java

Questions Related to java

What is bean-managed persistence?
java

  1. When you implement entity or session bean methods to use SQL commands you provide.

  2. When the bean's container handles data storage and retrieval.

  3. When the J2EE server is never shut down

  4. When changes to database data are lost during a crash.

Show answer
Correct Option: A

How are life cycle methods called?
java

  1. By thin clients.

  2. By calls to the database.

  3. By the J2EE server.

  4. By the bean's container.

Show answer
Correct Option: C

In a multitiered application, which tier is the browser in?
java

  1. First tier.

  2. Second tier.

  3. Third tier.

  4. Fourth tier

Show answer
Correct Option: A

Which of the following is true of cloud computing?
java

  1. It's always going to be less expensive and more secure than local computing.

  2. You can access your data from any computer in the world as long as you have an Internet connection.

  3. Only a few small companies are investing in the technology, making it a risky venture.

  4. none of these

Show answer
Correct Option: B
Explanation:

To answer this question, the user needs to have a basic understanding of cloud computing.

Cloud computing refers to the practice of using remote servers hosted on the internet to store, manage, and process data. It offers various benefits such as scalability, flexibility, and cost-effectiveness. Let's go through each option and explain why it is right or wrong:

A. It's always going to be less expensive and more secure than local computing.

This statement is incorrect. While cloud computing can be cost-effective and offer enhanced security measures, it is not always guaranteed to be less expensive or more secure than local computing. The cost and security of cloud computing can vary depending on factors such as the specific cloud service provider and the level of security measures implemented.

B. You can access your data from any computer in the world as long as you have an Internet connection.

This statement is correct. One of the key advantages of cloud computing is the ability to access data and applications from anywhere with an internet connection. This flexibility allows users to access their data and work remotely from different devices and locations.

C. Only a few small companies are investing in the technology, making it a risky venture.

This statement is incorrect. Cloud computing has gained widespread adoption and investment from both small and large companies across various industries. It is a rapidly growing technology that offers numerous benefits and opportunities for businesses.

D. none of these

This statement is incorrect. As explained above, option B is correct as it accurately describes one of the advantages of cloud computing.

The Answer is: B

What is private cloud?
java

  1. A standard cloud service offered via the Internet

  2. A cloud architecture maintained within an enterprise data center.

  3. A cloud service inaccessible to anyone but the cultural elite

  4. none of these

Show answer
Correct Option: B
Explanation:

To understand what a private cloud is, the user needs to have a basic understanding of cloud computing and the different types of cloud architectures.

A private cloud is a cloud architecture maintained within an enterprise data center. This means that the cloud infrastructure is owned, operated, and maintained by a specific organization or enterprise. Unlike a public cloud, which is accessible to anyone via the internet, a private cloud is specifically designed and dedicated to meet the needs and requirements of a single organization.

Now let's go through each option and explain why it is right or wrong:

A. A standard cloud service offered via the Internet: This option is incorrect because a private cloud is not a standard cloud service offered via the internet. A private cloud is a distinct architecture that is maintained within an enterprise data center.

B. A cloud architecture maintained within an enterprise data center: This option is correct. As explained above, a private cloud is a cloud architecture that is maintained within an enterprise data center.

C. A cloud service inaccessible to anyone but the cultural elite: This option is incorrect. The accessibility of a private cloud is not based on cultural elite or exclusive access. It is a cloud architecture dedicated to meeting the needs of a specific organization.

D. None of these: This option is incorrect because option B is the correct answer. A private cloud is a cloud architecture maintained within an enterprise data center.

The Answer is: B

Amazon Web Services is which type of cloud computing distribution model?
java

  1. Software as a Service (SAAS)

  2. Platform as a Service (PAAS)

  3. Infrastructure as a Service (IAAS)

  4. none of these

Show answer
Correct Option: C

What is Cloud Foundry?
java

  1. A factory that produces cloud components

  2. An industry wide PaaS initiative

  3. VMware-led open source PaaS.

  4. none of these

Show answer
Correct Option: C
Explanation:

To answer this question, the user needs to know what Cloud Foundry is. Cloud Foundry is a platform as a service (PaaS) that allows developers to build, deploy, and scale applications quickly and easily.

Now let's explain each option and why it is right or wrong:

A. A factory that produces cloud components: This option is incorrect. Cloud Foundry is a software platform, not a physical factory.

B. An industry-wide PaaS initiative: This option is partially correct. Cloud Foundry is indeed a PaaS initiative, but it is not an industry-wide initiative. It was initially created by VMware, but it is now managed by the Cloud Foundry Foundation, which is a non-profit organization.

C. VMware-led open source PaaS: This option is mostly correct. Cloud Foundry was initially created by VMware and is now managed by the Cloud Foundry Foundation, which is an open-source organization. It is a PaaS that allows developers to build, deploy, and scale applications quickly and easily.

D. None of these: This option is incorrect. Options B and C are both partially correct and together they provide a complete and accurate description of Cloud Foundry.

Therefore, the answer is: C. VMware-led open source PaaS.

This is a software distribution model in which applications are hosted by a vendor or service provider and made available to customers over a network, typically the Internet.
java

  1. Platform as a Service (PaaS)

  2. Infrastructure as a Service (IaaS)

  3. Software as a Service (SaaS).

  4. none of these

Show answer
Correct Option: C

Which of the following statements about Google App Engine (GAE) is INCORRECT.

java

  1. It's a Platform as a Service (PaaS) model.

  2. Automatic Scalability is built in with GAE. As a developer you don't need to worry about application scalability

  3. You can decide on how many physical servers required for hosting your application.

  4. The applications deployed on GAE have the same security, privacy and data protection policies as that of Google's applications. So, applications can take advantage of reliability, performance and security of Google's infrastructure.

Show answer
Correct Option: C

AI Explanation

To answer this question, let's go through each option to understand why it is correct or incorrect:

Option A) It's a Platform as a Service (PaaS) model - This option is correct. Google App Engine (GAE) is indeed a Platform as a Service (PaaS) model, where developers can build and deploy applications without worrying about the underlying infrastructure.

Option B) Automatic Scalability is built in with GAE. As a developer you don't need to worry about application scalability - This option is correct. GAE provides automatic scalability, meaning that it can handle the scaling of your application based on the incoming traffic without the need for developers to worry about it.

Option C) You can decide on how many physical servers required for hosting your application - This option is incorrect. In Google App Engine, developers do not have control over the number of physical servers required for hosting their application. The underlying infrastructure is managed by Google, and developers only need to focus on writing their application code.

Option D) The applications deployed on GAE have the same security, privacy, and data protection policies as that of Google's applications. So, applications can take advantage of reliability, performance, and security of Google's infrastructure - This option is correct. Applications deployed on Google App Engine benefit from the same security, privacy, and data protection policies as Google's applications, ensuring reliability, performance, and security.

Therefore, the incorrect statement is Option C) You can decide on how many physical servers required for hosting your application.

The correct answer is C.

I've a website containing all static pages. Now I want to provide a simple Feedback form for end users. I don't have software developers, and would like to spend minimum time and money. What should I do?
java

  1. Hire software developers, and build dynamic page.

  2. Use ZOHO creator to build the required form, and embed in html page.

  3. Use Google App Engine (GAE) to build and deploy dynamic page.

  4. none of these

Show answer
Correct Option: B