Which statement is false?
a. The compiler always creates a default constructor for a class.
b. If a class’s constructors all require arguments and a program attempts to call a no-argument constructor to initialize an object of the class, a compilation error occurs.
c. A constructor can be called with no arguments only if the class does not have any constructors or if the class has a public no-argument constructor.
d. None of the above.
a. The compiler always creates a default constructor for a class.
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Suppose that the transaction processing system of your university contains a table in which there is one tuple for each currently registered student.
a. Estimate howmuch disk storage is required to store this table. b. Give examples of transactions that must lock this entire table if a table-locking concurrency control is used.
Answer the following statements true (T) or false (F)
1. A local class and a nested class are the same thing. 2. If v is a vector and i is an int variable, then in the following the value of i can be any nonnegative int value: v[i] = i; 3. It is valid to initialize member variables in a class on the same line in which the variable is declared. For example, the following sets xx to 1000: ``` class A { public: A(){} private: int xx = 1000; }; ``` 4. If we use an out of range index with a vector, there be an error message from the compiler.
Which of the following options describes the portrait page orientation?
A. Page height is smaller than its width. B. Page width is smaller than its height. C. Page width is equal to its height. D. computer screen resolution
The Top-Level Tasks report is a summary of the major phases showing start, finish, cost, and work values for each phase.
Answer the following statement true (T) or false (F)