Question

1. Match each language to the typing model that best describes it.

__ Ruby

__ Prolog

__ Scala

__ lo

A.	static type checking with strong type safety
B.	dynamic type checking with strong (duck) type safety
C.	a prototype-based object model, uses dynamic typing.
D.	types are not specified, but when it compiles it will give errors if variables are not compatible

2. Match each language with it's corresponding strength

__ Ruby

__ Prolog

__ Scala

__ lo

A. Provides a unique tool for solving problems using an existing knowledge base of facts and rules. B. Simple design allows for excellent flexibility and robust concurrency. C. Very productive with little code because of the large amount of syntactic sugar and flexible object model. D. Provides a bridge to bring functional programming to the Java platform.

3. Choose the language that best fits the described task.

__ Ruby

__ lo

__ Prolog

__ Scala

A.	I need to create a script that Reads XML input Determines which program needs to be called Calls the corresponding program Converts the output into XML Returns the result to the caller
B.	I need to create a program that: Receives requests for information from multiple concurrent sources Obtains results of request by reading a simple file Returns results to caller Is able to run on multiple devices, appliances, or other devices with limited hardware resources
C.	I need a program that will: Compile language and grammar data that is collected into a readable data set Allow language rules to be defined Recognize the parts of speech in given sentences to understand how to interpret it.
D.	I need a program that will: Handle concurrent requests from multiple clients Parse XML messages Process requests using existing Java classes. Return XML results to caller

4. Which of the following best describes Scala's Interaction Model?

A. Interpreted

B. Compiled

C. Functional

D. Logic-Based

Answer 1

Answer:---------

1).
Ruby --> B. dynamic type checking with strong (duck) type safety

Prolog --> D. types are not specified, but when it compiles it will give errors if variables are not compatible

Scala --> A. static type checking with strong type safety

lo --> C. a prototype-based object model, uses dynamic typing.

2).
Ruby --> B. Simple design allows for excellent flexibility and robust concurrency.

Prolog --> A. Provides a unique tool for solving problems using an existing knowledge base of facts and rules.

Scala --> D. Provides a bridge to bring functional programming to the Java platform.

lo --> C. Very productive with little code because of the large amount of syntactic sugar and flexible object model.

3).

Ruby -->
B.I need to create a program that:

• Receives requests for information from multiple concurrent sources
• Obtains results of request by reading a simple file
• Returns results to caller
• Is able to run on multiple devices, appliances, or other devices with limited hardware resources

lo -->

A. I need to create a script that

• Reads XML input
• Determines which program needs to be called
• Calls the corresponding program
• Converts the output into XML
• Returns the result to the caller

Prolog -->
C.
I need a program that will:

• Compile language and grammar data that is collected into a readable data set
• Allow language rules to be defined
• Recognize the parts of speech in given sentences to understand how to interpret it.

Scala -->
I need a program that will:

• Handle concurrent requests from multiple clients
• Parse XML messages
• Process requests using existing Java classes.
• Return XML results to caller

4). B. Compiled