What are two (distinct) advantages in C++ of importing a String library rather than coding string variables from scratch? 4) What happens when you “increment” an enumerated data type?

INSTRUCTIONS TO CANDIDATES

ANSWER ALL QUESTIONS

1) Write a simple pre-test loop in a language familiar to you. Identify the language.

2) What is the difference between the “scope” and the “lifetime” of a variable?

3) What are two (distinct) advantages in C++ of importing a String library rather than coding string variables from scratch? 4) What happens when you “increment” an enumerated data type?

5) Since the sub-range data type is an artificially restricted subset of a regular data type (e.g., integers), what is the advantage of including them in a programming language?

6) What would be the advantage of creating a “jagged” multi-dimensional array?

7) Why are linked lists used to simulate dynamic arrays in many languages? 8) What is referential transparency?

9) How can potential ambiguities be resolved when using two-way selector statements?

10) Give an example of a program that could use a FOR loop with a step size greater than 1.

11) If you were creating a programming language and had to decide between including only a FOR loop or only a WHILE loop, which would you choose? Explain your selection.

12) Under what circumstances would the inclusion of an infinite loop NOT be a coding mistake?

13) Explain how coercion can lead to problems when overloading subprograms.

14) What are “polymorphic” subprograms?

15) What is “shallow” binding? Section 2: Less-short Answers (40 points)

1) Give an example of a Record declaration in Ada syntax (see your notes) that might contain data for students of a university, including fields that you would consider to be relevant. 2) Make a case for either: a) including user-accessible pointers in Java, or b) excluding pointers from the C language family. 3) Would your ideal programming language allow the GOTO statement? Why or why not? 4) What is an advantage of using parameter-passing between subprograms, rather than merely allowing them all to interact with globally-scoped variables? 5) If you were using a programming language that only allowed functions to return ONE value, but you wanted to modify the value of two variables with a single function call, how would you do it?

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