Deck 2: Introduction to C Programming; Inputoutput and Operators

Question 1

Which of the following statements does not overwrite a preexisting value stored in a memory location?

A) int a;
B) number = 12;
C) y = y + 2;
D) width = length;

Answer 1

A

Question 2

What is the value of result after the following C++ statements execute? int a{4};
Int b{12};
Int c{37};
Int d{51};
Int result{d % a * c + a % b + a};

A) 119
B) 51
C) 127
D) 59

Answer 2

A

Question 3

Which is the output of the following statements? std::cout << "Hello ";
Std::cout << "World";

A) Hello World
B) World Hello
C) Hello World
D) World Hello

Answer 3

A

Question 4

Which of the following is the escape character?

A) *
B) \
C) \n
D) "

Question 5

In what order would the following operators be evaluated -, *, /, +, %
Assume that if two operations have the same precedence, the one listed first will be evaluated first.

A) +, -, /, *, %
B) -, +, %, *, /
C) -, *, %, +, /
D) *, /, %, -, +

Question 6

What will be the output after the following C++ statements have been executed? int a{4};
Int b{12};
Int c{37};
Int d{51};
If (a < b) {
Cout << "a < b" << endl;
}
If (a > b) {
Cout << "a > b" << endl;
}
If (d <= c) {
Cout << "d <= c" << endl;
}
If (c != d) {
Cout << "c != d" << endl;
}

A) a < b c != d
B) a < b d <= c
C != d
C) a > b c != d
D) a < b c < d
A != b

Question 7

Which of the following does not cause a syntax error to be reported by the C++ compiler?

A) Mismatched {}.
B) Missing */ in a comment.
C) Missing ; at the end of a statement.
D) Extra blank lines.

Question 8

Which of the following statements could potentially change the value of number2?

A) std::cin >> number2;
B) sum = number1 + number2;
C) number1 = number2;
D) std::cout << number2;

Question 9

Which of the following is not an arithmetic operator?

A) +
B) -
C) =
D) %

Question 10

The ________ object enables a program to read data from the user.

A) std::cout.
B) std::cin.
C) std::cread.
D) std::cget.

Question 11

Which of the following is a variable declaration statement?

A) int total;
B) #include
C) int main()
D) // first string entered by user

Question 12

The std::endl stream manipulator________.

A) inputs a newline.
B) flushes the output buffer.
C) outputs a newline and flushes the output buffer.
D) terminates the program.

Question 13

The escape sequence for a newline is:

A) \n
B) \t
C) \r
D) \a

Question 14

Which of the following is not a valid C++ identifier?

A) my Value
B) _AAA1
C) width
D) m_x

Question 15

End-of-line comments that should be ignored by the compiler are denoted using:

A) Two forward slashes (//).
B) Three forward slashes (///).
C) A slash and a star (/*).
D) A slash and two stars (/**).

Question 16

Which of the following code segments prints a single line containing hello there with the words separated by a single space?

A) std::cout << "hello "; std::cout << " there";
B) std::cout << "hello" , " there";
C) std::cout << "hello"; std::cout << "there";
D) std::cout << "hello"; std::cout << " there";

Question 17

The assignment operator ________ assigns the value of the expression on its right to the variable on its left.

A) <-
B) ->
C) =
D) #

Question 18

Which of the following statements would display the phrase C++ is fun?

A) std::cout << "Thisis fun\rC++ ";
B) std::cout << '++ is fun';
C) std::cout << "\"C++ is fun\"";
D) std::cout << C++ is fun;

Question 19

Which of the following is not a syntax error?

A) std::cout << 'Hello world! ';
B) std::cout << "Hello world! ";
C) std::cout << "Hello world! ";
D) std::cout << Hello world!;

Question 20

Which of the following uses C++11's list initialization to initialize count to 0?

A) int count = 0;
B) int count[0];
C) int count(0);
D) int count{0};

Question 21

Each of the following is a relational or equality operator except:

A) <=
B) =!
C) ==
D) >

Question 22

Which of the following is a compilation error?

A) Neglecting to declare a local variable in a function before it is used.
B) Using a triple equals sign instead of a double equals sign in the condition of an if statement.
C) Omitting the left and right parentheses for the condition of an if statement.
D) All of the above.