Basic payment options for e-commerce

What will be an ideal response?

Credit-card, digital cash

Computer Science & Information Technology

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What is the first item in the queue after line 5?

``` 1 queue list; 2 list.push(“eggs”); 3 list.push(“milk”); 4 list.push(“bread”); 5 list.push(“cheese”); 6 cout << line.size(); 7 list.pop(); 8 cout << list.front(); 9 list.pop(); 10 list.pop(); 11 list.pop(); ``` A. eggs B. milk C. bread D. cheese

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Computer Science & Information Technology

On a sequence diagram, a lateral bar or vertical rectangle is used to represent:

A) messages sent between classes. B) the time sequence of activities. C) the focus of control, when an object is busy doing things. D) the lifeline for the class or object.

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Computer Science & Information Technology

Consider classes A, B and C, where A is an abstract superclass, B is a concrete class that inherits from A and C is a concrete class that inherits from B. Class A declares abstract method originalMethod, implemented in class B. Which of the following statements is true of class C?

a. Method original Method cannot be overridden in class C—once it has been implemented in concrete class B, it is implicitly final. b. Method originalMethod must be overridden in class C, or a compilation error will occur. c. If method originalMethod is not overridden in class C but is called by an object of class C, an error occurs. d. None of the above.

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Computer Science & Information Technology

Which text editor is free to download for Mac?

a. TextWrangler b. TextEdit c. Notepad d. VoodooPad

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Computer Science & Information Technology