I need help with my assignment.... this is way to difficult and don't understand.

[Ineedhelpplz]

I dont understand the following questions, I put a "-" next to the answers that I beleive are correct, I would just like some assistance on them, and maybe a summary or explaination. Would be helpful, thanks!


1.What is the output of the following C++ code?

num = 20;
while (num > 20)
num = num - 1;
cout << num << endl;

A: 18
B:0
C:20 -
D:16
-------------------------------------------------------------
2.Suppose that ch1 and ch2 are char variables and the input is:

ABCD

What is the value of ch2 after the following statements execute?

cin.get(ch1);
cin.putback(ch1);
cin >> ch2;

1: A
2:B -
3:D
4:C
-------------------------------------------------------------
3.What is the return type of the function operator ==?

A:void

B:int

C:char

D:bool
-------------------------------------------------------------
4.What is the output of the following code?

stackType stack;
int x, y;

x = 9;
y = 3;
stack.push(8);
stack.push(x);
stack.push(x + 1);
y = stack.top();
stack.pop();
stack.push(x + y);
x = stack.top();
stack.pop();

cout << ""x = "" << x << endl;

A:x = 12

B:x = 15

C:x = 19

D:x = 22 -
------------------------------------------------------------
5.To sort a list of length 500, bubble sort makes about how many item assignments?

A:"500,000" -

B:"11,000"

C:"124,000"

D:"62,000"
-------------------------------------------------------------
6.What is a variable or expression listed in a call to a function?

A:data type

B:type of the function

C:formal parameter

D:actual parameter -
-------------------------------------------------------------
7.Which of the following monitors the overall activity of the computer and provides services?

A:operating system -

B:central processing unit

C:arithmetic logic unit

D:computer application
-------------------------------------------------------------
8.If the derived class classA overrides a public member function functionName of the base class classD, then to specify a call to that public member function of the base class you use the statement ____.

A:classD.functionName();

B:classA::functionName();

C:classD::functionName(); -

D:classA.functionName();
-------------------------------------------------------------
9.What is the value of z after the following statements execute?

int z = 10;
int *p;
p = &z;
*p = 12;

A:null

B:10

C:12 -

D:0
---------------------------------------------------------------
10.The following expression (a + b) * (c - d) is equivalent to which of the following postfix expressions?

A:a b c d - + *

B:c d + a b - *

C:a b + c d - *

D:a b - + c d *

If anyone could help me that would be awesome. I got some more but I believe I understand them, if not, I will create another thread. Thanks!

[Ineedhelpplz]

another assignment that makes no sense...

1. Suppose that inventory is an array of 50 components of type int. Which of the following correctly initializes the array inventory?

A:for (int j == 1; j <= 49; j++)
inventory[j] = 0.0;

B:for (int j = 0; j <= 49; j++)
inventory[j] = 0;

C:for (int j = 1; j <= 50; j++)
inventory[j] = 0.0;

D:for (int j == 0; j <= 50; j++)
inventory[j] = 0;
----------------------------------------------------------------------
2.If the search item is the 500th item in the list, how many key comparisons does the sequential search make to find the search item?

A:125

B:500

C:50

D:250
-----------------------------------------------------------------------
3. What is the output of the following code?

enum courses {CALCULUS, FORTRAN, COBOL, RELIGION, HISTORY};
courses registered;
registered = FORTRAN;
cout << registered+1 << endl;

A:COBOL

B:1

C:FORTRAN

D:2
----------------------------------------------------------
4.Suppose that z is an int variable. Which of the following expressions always evaluates to true?

A:(z > 0) && ( z == 0)

B:(z >= 0) || ( z <= 0)

C:(z > 0) || (z == 0)

D:(z > 0) && (z >= 0)
-------------------------------------------------------------------
5. Consider the accompanying class definition, and the declaration:

ovalType smallOval;

Which of the following statements is correct?

A:smallOval.print();

B:ovalType:print();

C:ovalType.print();

D:smallOval:print();
------------------------------------------------------------------------
6. Which of the following is a valid C++ statement?

A:assert(divisor = 0);

B:assert(divisor is 0);

C:assert(0 += divisor);

D:assert(divisor == 0);
------------------------------------------------------------------------
7. What does every node (except of the last node) in a singly linked list contain?

A:the address of the next node

B:no address information

C:the next node

D:the address of the previous node
------------------------------------------------------------------------
8.Which of the following statements correctly initializes the component length of mySquare?

A:mySquare = {5};

B:mySquare(length)= 5;

C:mySquare.length = 5;

D:mySquare[0]= 5;
------------------------------------------------------------------------
9. Which of the following is an example of a floating point data type?

A:char

B:double

D:int

C:short
---------------------------------------------------------------------------
10. In what type of recursive function is the last statement executed the recursive call?

A:direct recursive

B:tail recursive

C:indefinite recursive

D:indirect recursive