The expression in parentheses following the keyword switch is called a __________.
a) guard condition
b) controlling expression
c) selection expression
d) case expression
b) controlling expression
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The ____ method can be used to set the ocean floor of an underwater scene.
A. ground.selectUnder() B. ground.moveAndOrientTo() C. ground.setPaint() D. ground.doScene()
When a file is opened for Append,
(A) data may be read starting at the beginning of the file. (B) data written to the file replaces the data already there. (C) data written to the file are inserted at the beginning of the file. (D) data written to the file are added at the end of the file.
A method is called from the main method for the first time. It then calls itself seven times. What is the depth of recursion?
a. 1 b. 7 c. 8 d. 6
Develop class Polynomial. The internal representation of a Polynomial is a dictionary of terms. Each term is a key–value pair that contains an exponent and a coefficient. The term 2x4 has the coefficient 2 and the exponent 4. For simplicity, assume the polynomial contains only nonne- gative exponents. Develop the class with a dictionary-based interface for accessing terms that includes the
following elements: a) The class’s constructor accepts a dictionary of exponent:coefficient pairs. b) Coefficient values in a Polynomial are accessed by exponent keys (e.g., polynomial[ exponent ] = coefficient). If a polynomial does not have a coefficient for a specified exponent, the expression polynomial[ exponent ] evaluates to 0. c) The length of a Polynomial is the value of its highest exponent. d) Define method __str__ for representing a Polynomial as a string with terms of the form cxy. e) Include an overloaded addition operator (+) to add two Polynomials. f) Include an overloaded subtraction operator (-) to subtract two Polynomials.