Computer Science Quiz 3

What will the value of x be after the following statements execute? int x = 0; int y = 5; int z = 4; x = y + z * 2; A) 13 B) 18 C) 0 D) unknown

A) 13

The only difference between the get function and the >> operator is that get reads the first character typed, even if it is a space, tab, or the [Enter] key. A) True B) False

A) True

When the fixed manipulator is used, the value specified by the setprecision manipulator will be the number of digits to appear after the decimal point. A) True B) False

A) True

This function tells the cin object to skip one or more characters in the keyboard buffer. A) cin.ignore B) cin.jump C) cin.hop D) cin.skip E) None of these

A) cin.ignore

The statement cin>>setw(10)>>str; will read up to this many characters into str. A) nine B) ten C) eleven D) eight E) None of these

A) nine

Which statement is equivalent to the following? number += 1; A) number = number + 1; B) number + 1; C) number = 1; D) None of these

A) number = number + 1;

When converting some algebraic expressions to C++, you may need to insert ________ that do not appear in the algebraic expression. A) parentheses B) exponents C) calculations D) coercions E) None of these

A) parentheses

In the following C++ statement, what will be executed first according to the order of precedence? result= 6-3*2+7-10/2; A) 6 - 3 B) 3 * 2 C) 2 + 7 D) 7 - 10 E) 10 / 2

B) 3 * 2

What is the value of number after the following statements execute? int number = 10; number += 5; number -= 2; number *= 3; A) 3 B) 39 C) 15 D) 2

B) 39

If you want to know the length of the string that is stored in a string object, you can call the object's size member function. A) True B) False

B) False

In C++, it is impossible to display the number 34.789 in a field of 9 spaces with 2 decimal places of precision. A) True B) False

B) False

The statement cout<<setprecision(5)<<dollars<<endl; will output $5.00 to the screen. A) True B) False

B) False

When a program uses the setw manipulator, the iosetwidth header file must be included in a preprocessor directive. A) True B) False

B) False

Which is true about the following statement? cout<<setw(4)<<num4<< " "; A) It allows four spaces for the value in the variable num4. B) It outputs "setw(4)" before the value in the variable num4. C) It should use setw(10) to output the value in the variable num10. D) It inputs up to four characters stored in the variable num4. E) None of these

B) It outputs "setw(4)" before the value in the variable num4.

The ________ causes a program to wait until information is typed at the keyboard and the Enter key is pressed. A) output stream B) cin object C)cout object D) preprocessor E) None of these

B) cin object

The function, pow(x, 5.0), requires this header file. A) cstdlib B) cmath C) cstring D) iostream E) iomanip

B) cmath

When using the sqrt function you must include this header file. A) cstdlib B) cmath C) cstring D) iostream E) iomanip

B) cmath

In any program that uses the cin object, you must include the ________. A) compiler B) iostream header file C) linker D) >> and << operators E) None of these

B) iostream header file

This manipulator causes the field to be left-justified with padding spaces printed to the right. A) left_justify B) right C) left D) left_pad E) None of these

C) left

Which line in the following program will cause a compiler error? 1) #include <iostream> 2) using namespace std; 3) 4) int main() 5) { 6) constant MY_VAL = 77; 7) MY_VAL = 99; 8) cout<<MY_VAL<<endl; 9) return 0; 10 } A) 6 B) 8 C) 9 D) 7

D) 7