CPS 150 Final Exam Study Questions From Test #1
A compilation of previous test questions and their answers.
- 1.Which of the following is a C++ keyword?
- A.
Number
- B.
Integer
- C.
Main
- D.
Double
- E.
Single
- 2.Which of the following about C++ identifiers is false?
- A.
'Sales' and 'sales' are considered different identifiers
- B.
An identifier cannot start with a digit
- C.
'the average' is a valid identifier
- D.
A keyword cannot be used as an identifier
- E.
An identifier must be declared by the programmer or in an #included library
- 3.If you want to have a variable which can hold a number with a fractional part (such as 8.67) you should declare it to be of what type?
- A.
Char
- B.
Double
- C.
Int
- D.
String
- E.
Bool
- 4.In C++, a (single line) comment begins with?
- A.
\ \
- B.
/ /
- C.
!
- D.
*
- E.
(*
- 5.To display the message Welcome ! the following can be used in C++
- A.
Cout
- B.
Cout >> "Welcome !" ;
- C.
Cin
- D.
Cout
- E.
Cin >> Welcome ! ;
- 6.Which of the following will produce the output Hello World ?
- A.
Cout
- B.
Cout
- C.
Cout
- D.
Cout
- E.
Cout
- 7.Which of the following is NOT a valid assignment statement?
- A.
X = 15;
- B.
X = y;
- C.
15 = y;
- D.
Y = x;
- E.
Y = 15;
- 8.Which arithmetic operator will be performed first in calculating the value of a + b * c - d / e % f ?
- A.
+
- B.
-
- C.
*
- D.
/
- E.
%
- 9.Which arithmetic operator will be performed last in calculating the value ofa + b * c - d / e % f ?
- A.
+
- B.
-
- C.
*
- D.
/
- E.
%
- 10.The arithmetic expression a+b is written C++ as? c+d
- A.
(a+b) / c+d
- B.
A+b / c+d
- C.
A + (b/c) +d
- D.
A+b/(c+d)
- E.
(a+b) / (c+d)
- 11.For the expression x%y to be valid, data types of x and y should be (respectively)?
- A.
Float and double
- B.
Int and int
- C.
Double and int
- D.
Char and float
- E.
Float and bool
- 12.Which pair of operators has the same precedence?
- A.
+ and *
- B.
- and /
- C.
+ and /
- D.
+ and -
- E.
- and *
- 13.Which of the following is not a relational operator in C++?
- A.
- B.
- C.
>
- D.
>=
- E.
=
- 14.Which expression has the value true when someone's income is at least 15000 but less than 50000; and has the value false otherwise?
- A.
15000
- B.
(15000
- C.
(15000 > income) && (income < 50000)
- D.
(15000 50000)
- E.
(15000 > income) || (income < 50000)
- 15.What is the output from the following program fragment?if ((2 + 2) == 4) cout << "Ha Ha\n" ;else cout << "Hee Hee\n" ;
- A.
Ha Ha
- B.
Hee Hee
- C.
'Ha Ha' on one line followed by 'Hee Hee' on the next line
- D.
No output because there is a syntax error
- E.
No output, but there is no syntax error
- 16.For which values of number will this program display Hello on the output screen?if ((number % 2) == 0) cout << "Hello" ;
- A.
For any value in number
- B.
For no value
- C.
For positive numbers
- D.
For even values
- E.
For negative values
- 17.What is the output from the following program fragment?int k(4) , sum ;while (k >= 1) { sum = 0 ; sum = sum + k ; k = k - 1 ;} // end whilecout << sum << endl ;
- A.
1
- B.
2
- C.
3
- D.
4
- E.
None of these
- 18.What is the output from the following program fragment?z = 15 ;while (z < 20) z = z + 2 ;cout << z << endl ;
- A.
15
- B.
17
- C.
19
- D.
20
- E.
21
- 19.If x and y are integer variables, and we want to calculate the result of dividing x by y using real (floating point) division, we should use the expression?
- A.
X / y
- B.
Static_cast(x / y)
- C.
Static_cast(x) / y
- D.
1.0 * (x / y)
- E.
(x / y) * 1.0
- 20.To generate a random integer value between 1 and 6 (both inclusive), we can use the expression:
- A.
1 + rand() / 6
- B.
6 + rand() / 1
- C.
6 + rand() % 1
- D.
1 + rand() % 6
- E.
(1 + rand()) / 6
- 21.Consider the following C++ fragmentif (average == 100) ; cout << "Congratulations!\n" ;Which of the following is NOT true?
- A.
The message 'Congratulations' is displayed regardless of the value in the variable 'average'
- B.
There is an empty (null) statement in this fragment
- C.
This fragment contains a syntax error so the program will not run
- D.
The if does not control the cout statement
- E.
The output from the fragment will not change if the == is replaced by !=
- 22.Which of the following is true about the Boolean expression (ch != 'Y') || (ch != 'N') Assuming that ch is of type char?
- A.
The expression has the value true regardless if the value in ch
- B.
The expression has the value false regardless of the value in ch
- C.
The value of the expression cannot be determined unless we know the value in ch
- D.
The expression has a syntax error
- E.
The expression is valid, but it is NOT a Boolean expression
- 23.If the variables test1, test2, test3 are all of int type, then which of the following expressions will calculate the average of their values correctly (it may have a fractional part)?
- A.
Test1 + test2 + test3 / 3
- B.
(test1 + test2 + test3) / 3
- C.
Test1 + test2 + test3 / 3.0
- D.
Test1 + test2 + (test3 / 3.0)
- E.
None of the above
- 24.Which of the following is a true statement?
- A.
A variable declared in the main function has a definite value just by being declared (as in int x ;)
- B.
A variable can be given an initial value when declared, but it need not be done
- C.
A variable must be given an initial value when declared (as in int x(5) ;
- D.
All of the above
- E.
None of the above
- 25.Which of the following statements has an output that cannot be predicted?
- A.
Cout
- B.
Cout
- C.
Cout
- D.
All of the above
- E.
None of the above
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