Could sum1 plz help me undastand these Questions
just wna no how it is done
fank u
If DoSomething is a void function that takes an int expression as an argument, which of the following is an incorrect statement? (Assume all variables are int variables.)
A) DoSomething(n);
B) DoSomething(3*n + 24);
C) length = DoSomething(width);
D) b and c above
E) a, b, and c aboveGiven that x is a float variable and num is an int variable containing the value 38, what will x contain after execution of the following statement:
x = num / 4 + 3.0;A) 12.5
B) 13
C) 12
D) 12.0
E) nothing; a compile-time error occursGiven the constant declaration
const int FACTOR = 95;
which of the following is not a valid use of FACTOR?
A) cout << FACTOR * 3;
B) FACTOR = 24;
C) cin >> FACTOR;
D) a and c above
E) b and c aboveAssuming alpha and beta are int variables, what is the output of the following code (which is indented poorly)?
alpha = 3; beta = 2; if (alpha < 2) if (beta == 3) cout << "Hello"; else cout << "There";A) Nothing is output.
B) Hello
C) There
D) HelloThereThe function heading
float TenToThePower( /* in */ int n ) is for a function that returns 10.0 raised to any integer power. Which of the following statements represents an appropriate use of the TenToThePower function?A) someFloat = 4.96 * TenToThePower(8) + 2.5;
B) TenToThePower(6);
C) if (TenToThePower(someInt) > someFloat)
beta = 3;
D) a and b above
E) a and c aboveGiven the function definition
int Mystery( /* in */ float someVal ) { if (someVal > 2.0) return 3 * int(someVal); else return 0; } what is the value of the expression Mystery(4.2) ?A) 12
B) 12.0
C) 0
D) 0.0
E) nothing--the function call is invalid- Which of the following is a valid use of the C++ cast operation?
A) gamma = short(delta);
B) beta = (long double) alpha;
C) beta = long double(alpha);
D) a and b above
E) a, b, and c aboveGiven the declarations
enum MovieRatings {G, PG, PG13, R, X}; MovieRatings thisOne; and assuming that thisOne currently contains a value less than X, which of the following statements can be used to "increment" thisOne?A) thisOne = thisOne + 1;
B) thisOne++;
C) MovieRatings(thisOne++);
D) thisOne = MovieRatings(thisOne + 1);
E) thisOne = MovieRatings(thisOne) + 1;Given the declarations
struct RecType1 { int length; float width; }; struct RecType2 { int length; float width; }; RecType1 myRec; RecType2 yourRec; which of the following assignment statements is valid?A) myRec.length = yourRec.length;
B) myRec = yourRec;
C) myRec.length = yourRec;
D) a and b above
E) none of the above- Assume that myclass.h and myclass.cpp are files for a class MyClass and that someprog.cpp is a client of class MyClass. Which file(s) must #include the file myclass.h?
A) someprog.cpp
B) myclass.cpp
C) myclass.h
D) a and b above
E) a, b, and c aboveConsider the class declaration
class SomeClass
{
public:
void Func();
private:
int m;
int n;
};and client codeSomeClass alpha;
SomeClass beta;
...Considering both pieces of code above, which identifiers are names of class objects?
A) m and n
B) alpha and beta
C) SomeClass, m, and n
D) alpha, beta, m, and n
E) Func, m, and nAfter execution of the code fragment
int arr[5];
int i;for (i = 0; i < 5; i++)
{
arr[i] = i + 2;
if (i >= 3)
arr[i-1] = arr[i] + 3;
}what is contained in arr[1]?
A) 2
B) 3
C) 7
D) 8
E) none of the aboveWhat does the following C++ statement do?
ptr = new RecType;
A) It allocates a dynamic variable named ptr.
B) It allocates a dynamic variable and stores the address into ptr.
C) It deallocates the variable ptr.
D) It deallocates the dynamic variable that is pointed to by ptr.Given the declaration
int* somePtr;
which of the following is a valid statement?
A) somePtr = new int*;
B) delete somePtr;
C) delete *somePtr;
D) a and c above
E) a, b, and c aboveGiven the declarations
struct ListNode { float volume; ListNode* link; }; ListNode* ptr; what is the data type of the expression ptr.volume ?
A) ListNode*
B) ListNode
C) float
D) *ListNode
E) none--the expression is invalid
