Which of the following statements is false?
a) Pointers should not be left uninitialized.
b) When you use free to deallocate dynamically allocated memory, the pointer passed to free is set to NULL.
c) Undefined behavior occurs when you attempt to use free to deallocate dynamic memory that was already deallocated
d) Function malloc returns NULL if it’s unable to allocate the requested memory.
b) When you use free to deallocate dynamically allocated memory, the pointer passed to free is set to NULL.
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Answer the following statements true (T) or false (F)
1) Polymorphism helps promote software extensibility. 2) If a derived class reference is assigned to a base class variable, the variable must be cast back to the derived class before any derived class methods can be called with it. 3) The abstract methods and properties of a class do not provide an implementation. 4) Concrete classes provide implementations for every method and property they define.
Drivers are concerned with the mileage their automobiles get. One driver has kept track of several tankfuls of gasoline by recording the miles driven and gallons used for each tankful. Develop a C# app that will input the miles driven and gallons used (both as integers) for each tankful. The app should calculate and display the miles per gallon obtained for each tankful and display the combined miles per gallon obtained for all tankfuls up to this point. All averaging calculations should produce floating-point results. Display the results rounded to the nearest hun- dredth. Use the Console class’s ReadLine method and sentinel-controlled iteration to obtain the data from the user.
a) Read the problem statement. b) Formulate the algorithm using pseudocode and top-down, stepwise refinement. c) Write a C# app. d) Test, debug and execute the C# app. e) Process three complete sets of data.
A __________ activates a function
Fill in the blank(s) with the appropriate word(s).
The | symbol in CSS means "____________________".
Fill in the blank(s) with the appropriate word(s).