Multiple choice Questions and Answers on Applications in the Clouds of Cloud Computing for Freshers

1. The properties necessary to guarantee a reliable transaction in databases and other applications is referred to as:

a) BASE
b) ACID
c) ATOM
d) All of the mentioned

Answer: b

Explanation: In computer science, ACID (Atomicity, Consistency, Isolation, Durability) is a set of properties that guarantee that database transactions are processed reliably.

2. Point out the wrong statement:

a) In theory, any application can run either completely or partially in the cloud
b) The location of an application or service plays a fundamental role in how the application must be written
c) An application or process that runs on a desktop or server is executed coherently, as a unit, under the control of an integrated program
d) None of the mentioned

Answer: d

Explanation: An action triggers a program call, code executes, and a result is returned and may be acted upon.

3. Which of the following is property of ACID principle ?

a) Atomicity
b) Consistency
c) Isolation
d) All of the mentioned

Answer: d

Explanation: The ACID principle is used today by any application that is reading and writing to a stored data set.

4. Which of the following ACID property states that the system must go from one known state to another and that the system integrity must be maintained ?

a) Atomicity
b) Consistency
c) Isolation
d) Durability

Answer: b

Explanation: The ACID rules were developed by Jim Gray to apply to database technology in the late 1970s.

5. Point out the wrong statement:

a) Taken as a unit, “Request => Process => Response” is not an atomic transaction
b) A coherent transaction either succeeds and is enacted, or fails and is rolled back
c) When rollback is not possible due to optimistic transaction commitment in a multiuser application, durability requires correcting the condition
d) None of the mentioned

Answer: a

Explanation: Taken as a unit, “Request => Process => Response” is an atomic transaction.

6. Which of the following component is required for both online and local data access in hybrid application ?

a) local
b) cloud
c) both local and cloud
d) none of the mentioned

Answer: c

Explanation: If the application needed to access data only when the client was online, then access to cloud-based storage would be the only data store your application would required.

7. Which of the following factors might offset the cost of offline access in hybrid application ?

a) scalability
b) costs
c) ubiquitous access
d) all of the mentioned

Answer: d

Explanation: These factors make the cloud more attractive.

8. An application that needed _______ storage alone might not benefit from a cloud deployment at all.

a) online
b) offline
c) virtual
d) all of the mentioned
d) None of the mentioned

Answer: b

Explanation: You could safely conclude that an application that gets the most value from a cloud deployment is one that uses online storage without the need for offline storage.

9. The __________ property states that the system must have a mechanism to recover from committed transactions should that be necessary.

a) Atomicity
b) Consistency
c) Isolation
d) Durability

Answer: d

Explanation: The isolation property states that the system cannot have other transactions operate on data that is currently being processed by a transaction.

10. Which of the following property defines a transaction as something that cannot be subdivided and must be completed or abandoned as a unit ?

a) Atomicity
b) Consistency
c) Isolation
d) Durability

Answer: a

Explanation: The isolation property states that the system cannot have other transactions operate on data that is currently being processed by a transaction.