Quiz 4 Flashcards
After execution of the following code, what will be the value of input_value if the value 0 is entered at the keyboard at run time?
cin >> input_value;
if (input_value > 5)
input_value = input_value + 5;
else if (input_value > 2)
input_value = input_value + 10;
else
input_value = input_value + 15;
*A) 15
B) 10
C) 25
D) 0
E) 5
What is assigned to the variable a given the statement below with the following assumptions: x = 10, y = 7, and z, a, and b are all int variables.
a = x >= y;
A) 10
B) 7
C) The string “x >= y”
*D) 1
E) 0
What will the following segment of code output?
Assume the user enters a grade of 90 from the keyboard.
cout << "Enter a test score: ";
cin >> test_score;
if (test_score < 60);
cout << "You failed the test!" << endl;
if (test_score > 60)
cout << "You passed the test!" << endl;
else
cout << "You need to study for the next test!";
A) You failed the test!
You Answered
B) You passed the test!
*C) You failed the test!
You passed the test!
D) You failed the test!
You did poorly on the test!
E) None of the above
When an if statement is placed within the conditionally-executed code of another if statement, this is known as:
A) complexity
You Answered
B) overloading
*C) nesting
D) validation
E) None of these
What will the following segment of code output?
score = 40;
if (score > 95)
cout << "Congratulations!\n";
cout << "That's a high score!\n";
cout << "This is a test question!" << endl;
A) This is a test question!
B) Congratulations!
That's a high score! This is a test question!
*C) That’s a high score!
This is a test question!
D) Congratulations!
That's a high score!
E) None of these
Assuming x is 5, y is 6, and z is 8, which of the following is false?
- x == 5;
- 7 <= (x + 2);
- z < = 4;
- (1 + x) != y;
- z >= 8;
- x >= 0;
- x <= (y * 2)
A) 3, 4, 6, 7 are false.
B) Only 5 is false.
*C) 3 and 4 are false.
D) All are false.
E) None of these.
Input values should always be checked for:
A) Appropriate range
B) Reasonableness
C) Division by zero, if division is taking place
*D) All of these
E) None of these
Without this statement appearing in a switch construct, the program “falls through” all of the statements below the one with the matching case expression.
*A) break B) exit C) switch D) scope E) None of these
Whereas < is called a relational operator, x < y is called a(n) ________.
A) Arithmetic operator
B) Relative operator
*C) Relational expression
D) Largeness test
E) None of these
In C++ the = operator indicates:
A) equality *B) assignment C) subtraction D) negation E) None of these
If you intend to place a block of statements within an if statement, you must place these around the block.
A) Parentheses ( )
B) Square brackets [ ]
C) Angle brackets < >
*D) Curly braces { }
E) None of these
What will the following segment of code output if the value 11 is entered at the keyboard?
int number;
cin >> number;
if (number > 0)
cout << "C++";
else
cout << "Soccer";
cout << " is ";
cout << "fun" << endl;
*A) C++ is fun
B) Soccer is fun
C) C++
D) C++fun
E) Soccerfun
What will the following program segment display?
int funny = 7, serious = 15;
funny = serious % 2;
if (funny != 1)
{
funny = 0;
serious = 0;
}
else if (funny == 2)
{
funny = 10;
serious = 10;
}
else
{
funny = 1;
serious = 1;
}
cout << funny << " " << serious << endl;
A) 7 15
B) 0 0
C) 10 10
*D) 1 1
E) None of these
When a program lets the user know that an invalid choice has been made, this is known as:
*A) input validation
B) output correction
C) compiler criticism
D) output validation
E) None of these
What will the following program display?
#include
using namespace std;
int main()
{
int a = 0, b = 2, x = 4, y = 0;
cout << (a == b) << " ";
cout << (a != b) << " ";
cout << (b <=x) << " ";
cout << (y > a) << endl;
return 0;
}
*A) 0 1 1 0
B) 0 0 1 0
C) 1 1 0 1
D) 1 0 0 1
E) None of these
This operator is known as the logical OR operator.
A) -- B) // C) # *D) || E) None of these
This operator performs a logical NOT operation.
A) -- *B) ! C) <> D) >< E) None of these
Given the following code segment, what is output after “result = “?
int x = 1, y = 1, z = 1;
y = y + z;
x = x + y;
cout << "result = "
<< (x < y ? y : x)
<< endl;
A) 0
B) 1
C) 2
*D) 3
E) None of these
Which statement allows you to properly check the char variable code to determine whether it is equal to a “C” and then output “This is a check” and then advance to a new line?
A) if code is equal to C
cout << "This is a check\n";
B) if (code = “C”)
cout << "This is a check" << endl;
*C) if (code == ‘C’)
cout << "This is a check\n";
D) if (code == C)
cout << "This is a check" << endl;
The ________ of a variable is limited to the block in which it is declared.
A) precedence
B) associativity
*C) scope
D) branching ability
E) None of these
Given that, x = 2, y = 1, and z = 0, what will the following cout statement display?
cout << "answer = " << (x || !y && z) << endl;
A) answer = 0
* B) answer = 1
C) answer = 2
D) None of these
The default section of a switch statement performs a similar task as the ________ portion of an if/else if statement.
A) conditional
B) break
* C) trailing else
D) All of these
E) None of these
What is the value of donuts after the following code executes?
int donuts = 10;
if (donuts != 10)
donuts = 0;
else
donuts += 2;
*A) 12
B) 10
C) 0
D) 2
What is the output of the following code?
int w = 98;
int x = 99;
int y = 0;
int z = 1;
if (x >= 99)
{
if (x < 99)
cout << y << endl;
else
cout << z << endl;
}
else
{
if (x == 99)
cout << x << endl;
else
cout << w << endl;
}
A) 98
B) 99
C) 0
*D) 1
Which line in the following program will cause a compiler error?
1 #include
2 using namespace std;
3
4 int main()
5 {
6 int number = 5;
7
8 if (number >= 0 && <= 100)
9 cout << "passed.\n";
10 else
11 cout << "failed.\n";
12 return 0;
13 }
A) 6
*B) 8
C) 10
D) 9
