Let's Play "What's the Question" Remember each question will be in the form of an answer and you must respond with a question. GOOD LUCK Here are the categories

Scheme Terms

The Design Recipe

Compound Data

And The Answer Is…

Errors

Templates

Scheme Terms The Design Recipe Compound Data And The Answer Is… Errors Templates $100 $100 $100 $100 $100 $100 $200 $200 $200 $200 $200 $200 $300 $300 $300 $300 $300 $300 $400 $400 $400 $400 $400 $400 $500 $500 $500 $500 $500 $500

Syntax is to computer languages as this is to English. $100

What is grammar? $100

cond, else, and define $200

What are keywords? $200

Refers to the meaning of programs. $300

What is semantics? $300

( + x 5 ) is an example of this. $400

What is an expression? $400

Variables that follow the first variable in the header? $500

What are parameters? $500

(define (f x) …) is an example of this. $100

What is a header? $100

Provides the name of the function as well as its input and output data types. $200

What is a contract? $200

The last step of the design recipe. $300

What is running the tests? $300

For a function involving compound data, this is the first step. $400

What is data definition? $400

This step provides an opportunity to think through the computational process of a function. $500

What are examples? $500

make-boa is an example of this. $100

What is a constructor? $100

A selector for the following structure (define-struct dillo (weight alive?)) $200

What is dillo-weight or dillo-alive? ? $200

(cons ‘Bob (cons ‘John empty))) is an example of this. $300

What is a list of symbols? $300

Daily Double

symbol? is an example of this. $400

What is a predicate? $400

These are actually selectors for lists. $500

What are first and rest? $500

(number? (make-posn 2 3 )) $100

What is false? $100

(first (cons 10 (cons 20 (cons 30 empty)))) $200

What is 10? $200

The value of (cond. [(< x 5) ‘RED]. [(> x 5) ‘BLUE] The value of (cond [(< x 5) ‘RED] [(> x 5) ‘BLUE] [else ‘GREEN]) when x = 3 $300

What is ‘RED? $300

Value of Y given the following: (define X 4) (define Y ( * 2 X)) $400

What is 8? $400

(rest (rest (cons 10 (cons 20 (cons 30 empty))))) $500

What is (cons 30 empty)? $500

(define (f) x (+ x 1)) generates this type of error. $100

What is syntax error? $100

empty? (L) generates an error. Give the corrected code. $200

What is (empty? L) ? $200

Type of error in the following: (define (f x) ( / x 0)) $300

What is a run-time error? $300

(draw-solid-disk make-posn (100 100) 50 ‘blue) produces an error (draw-solid-disk make-posn (100 100) 50 ‘blue) produces an error. Describe the cause of this error. $400

What is misplaced parenthesis? $400

A program that never ends has this. $500

What is an infinite loop? $500

Number of cond lines needed in a function that consumes an animal that is either a boa, dillo or ant. $100

What is three? $100

A template for a function consuming this data type should include constructors, selectors and predicates. $200

What is a structure? $200

first and rest appear in templates for this data type. $300

What are lists? $300

The template for this date type is self-referential. $400

What is a list? $400

Used in templates for functions consuming mixed data types, this type of operator determines what type of data is being processed. $500

What is a predicate? $500

Final Game Question Purpose of Function

The purpose of the function, f1 (define (f1 lon). (cond. [(empty The purpose of the function, f1 (define (f1 lon) (cond [(empty? lon) 0] [else (+ (first lon) (f1 (rest lon))]))

What is “To determine the sum of a list of numbers”?

And the winner is…..