Question 1

What is the correct way to write the condition y < x < z?
A) y < x < z)
B) y < x) && z)
C) y > x) || y < z))
D) y < x) && x < z))

Accepted Answer

The correct way to write the condition "y < x < z" is to use the logical AND operator "&&" between two separate inequalities, resulting in "y < x && x < z". Option D correctly represents this format. The other options either have incorrect syntax or use the logical OR operator instead of AND, which doesn't accurately represent the original condition.

Question 2

If x has the value of 3, y has the value of -2, and w is 10, is the following condition true or false?
If x < 2 && w < y)
A) true
B) false

Accepted Answer

x < 2 is false because x is given the value of 3.
w < y is also false because w has a value of 10 which is greater than the value of y. Therefore, the entire condition is false.

Question 3

What is the value of x after the following statement?
Float x;
X = 3.0 / 4.0 + 3 + 2 )/ 5
A) 5.75
B) 5.75.
C) 1.75
D) 3.75

Accepted Answer

First, let's break down the statement:

- We declare a float variable named "x".
- We set the value of "x" equal to: 
  - (3.0 / 4.0 + 3 + 2) / 5

Using order of operations (PEMDAS), we simplify from left to right:

- 3.0 / 4.0 = 0.75
- 0.75 + 3 = 3.75
- 3.75 + 2 = 5.75
- 5.75 / 5 = 1.15

Therefore, the final value of "x" is 1.15, which is closest to choice C (1.75), with a difference of 0.60.

Question 4

Given the following code fragment, what is the final value of y?
Int x, y;
X = -1;
Y = 0;
Whilex < 3)
{
Y += 2;
X += 1;
}
A) 2
B) 10
C) 6
D) 8

Accepted Answer

The answer of Given the following code fragment, what is...

Question 5

What is the value of x after the following statements?
Double x;
X = 0;
X += 3.0 * 4.0;
X -= 2.0;
A) 22.0
B) 12.0
C) 10.0
D) 14.0

Accepted Answer

The initial value of x is 0. After the operation X += 3.0 * 4.0, x becomes 12.0. Then, X -= 2.0 reduces x to 10.0.

Question 6

Given the following code fragment, and an input value of 5, what is the output?
Int x;
If x< 3)
{
Cout << "small
";
}
Else
{
If x < 4)
{
Cout << "medium
";
}
Else
{
If x < 6)
{
Cout << "large
";
}
Else
{
Cout << "giant
";
}
}
}
A) small
B) medium
C) large
D) giant

Accepted Answer

The input value of 5 satisfies the condition x < 6, so the output will be "large". The first two conditions, x < 3 and x < 4, are not satisfied by the input value of 5. The final condition, x >= 6, is not necessary since the previous condition has already been met.

Question 7

What is the value of x after the following statement?
Float x;
X = 3.0 / 4.0 + 3 + 2 / 5
A) 5.75
B) 5.75.
C) 1.75
D) 3.75

Accepted Answer

The calculation follows the order of operations: 3.0 / 4.0 = 0.75, 2 / 5 = 0.4 (but since 2 and 5 are both integers, this division in many programming languages would result in 0 due to integer division, however, given the context seems to imply floating point calculation, we'll proceed with the assumption of a floating point context), 0.75 + 3 = 3.75, 3.75 + 0.4 = 4.15. However, the provided options seem to not account for the correct calculation based on standard arithmetic, suggesting a possible mistake in the interpretation. Given the options, the closest to the expected operation based on the initial arithmetic without considering integer division is 3.75, assuming the division was intended to be floating point but the last addition was mistakenly overlooked.

Question 8

Given the following code fragment, what is the output?
Int x=5;
If x > 5)
Cout << "x is bigger than 5. ";
Cout <<"That is all. ";
Cout << "Goodbye
";
A) x is bigger than 5. That is all
B) x is bigger than 5
C) That is all. Goodbye
D) Goodbye

Accepted Answer

The condition `x > 5` is false because x equals 5, not greater than 5. Therefore, the first `cout` statement inside the if condition is skipped, and the program continues to execute the next lines of code outside the if condition, printing "That is all. Goodbye
".

Question 9

Given the following code fragment, and an input value of 3, what is the output that is generated? Int x; Cout <<"Enter a value "; Cin >> x; Ifx=0) { Cout << "x is zero "; } Else { Cout << "x is not zero "; } A) x is zero B) x is not zero C) unable to determine D) x is 1

Accepted Answer

The answer of Given the following code fragment, and an...

Question 10

Given the following code fragment and the input value of 2.0, what output is generated? Float tax; Float total; Cout << "enter the cost of the item "; Cin >> total; If total >= 3.0) { Tax = 0.10; Cout << total + total * tax) << endl; } Else { Cout << total << endl; } A) 2.2 B) 2.0 C) 3.1 D) 4.4

Accepted Answer

The input value given is 2.0, which is less than 3.0, so the else block is executed, and it simply prints the value of total which is 2.0. Therefore, the output generated is 2.0.

Question 11

What is the final value of x after the following fragment of code executes?
Int x=0;
Do
{
X++;
}whilex > 0);
A) 8
B) 9
C) 10
D) 11
E) infinite loop.

Accepted Answer

The condition in the do-while loop checks if x is greater than 0 after incrementing x at least once. Since x is incremented to 1 in the first iteration and the condition `x > 0` will always be true for subsequent iterations, the loop will continue indefinitely, resulting in an infinite loop.

Question 12

Given the following code fragment, what is the final value of y?
Int x, y;
X = -1;
Y = 0;
Whilex <= 3)
{
Y += 2;
X += 1;
}
A) 2
B) 10
C) 6
D) 8

Accepted Answer

The loop runs while x is less than or equal to 3. Starting from x = -1, it increments x by 1 and y by 2 in each iteration. The loop runs 5 times (x = -1, 0, 1, 2, 3), so y becomes 0 + (2 * 5) = 10.

Question 13

Executing one or more statements one or more times is known as:
A) selection
B) iteration
C) sequence
D) algorithm

Accepted Answer

Iteration is the process of executing one or more statements repeatedly, usually based on a condition or a loop counter. Therefore, option B is the correct answer. Selection (A) is the process of choosing among different alternatives based on a condition. Sequence (C) is the process of executing statements in a specific order. Algorithm (D) is a set of instructions designed to solve a specific problem or accomplish a specific task. While all of these concepts are important in programming, only iteration fits the description given in the question.

Question 14

What is the output of the following code fragment?
Int x=0;
While x < 5)
Cout << x << endl;
X ++;
Cout << x << endl;
A) 0
B) 5
C) 4
D) unable to determine

Accepted Answer

The given code fragment contains a syntax error in the while loop as the closing parenthesis is missing after the condition. So, the code will not compile, and the output cannot be determined.

Question 15

Given the following code fragment, which of the following expressions is always true?
Int x;
Cin >> x;
A) if x < 3)
B) if x==1)
C) if x / 3) >1 )
D) if x = 1)

Accepted Answer

The answer of Given the following code fragment, which of...

Question 16

Given the following code fragment and the input value of 4.0, what output is generated? Float tax; Float total; Cout << "enter the cost of the item "; Cin >> total; If total >= 3.0) { Tax = 0.10; Cout << total + total * tax) << endl; } Else { Cout << total << endl; } A) 3 B) 3.3 C) 4.0 D) 4.4

Accepted Answer

The program prompts the user to enter the cost of the item. Since the input value is 4.0, the "if" statement is satisfied and the tax rate of 10% is applied. Therefore, the output will be the total price plus the calculated tax, which is 4.0 + (4.0 * 0.10) = 4.4. Hence, the correct choice is D.

Question 17

What is the advantage of the C++11 integer data types over the old data types?
A) Number of bits allocated changes dynamically as needed
B) No advantage, just new names
C) Specifies exact size in bits
D) Higher precision

Accepted Answer

The C++11 integer data types specify exact size in bits, which allows for more precise control over memory usage and eliminates dependencies on platform-specific behavior.

Quiz 2: C++ Basics

What is the correct way to write the condition y < x < z?

If x has the value of 3, y has the value of -2, and w is 10, is the following condition true or false? If x < 2 && w < y)

What is the value of x after the following statement? Float x; X = 3.0 / 4.0 + 3 + 2 ) / 5

Given the following code fragment, what is the final value of y? Int x, y; X = -1; Y = 0; Whilex < 3) { Y += 2; X += 1; }

What is the value of x after the following statements? Double x; X = 0; X += 3.0 * 4.0; X -= 2.0;

Given the following code fragment, and an input value of 5, what is the output? Int x; If x< 3) { Cout << "small\n"; } Else { If x < 4) { Cout << "medium\n"; } Else { If x < 6) { Cout << "large\n"; } Else { Cout << "giant\n"; } } }

What is the value of x after the following statement? Float x; X = 3.0 / 4.0 + 3 + 2 / 5

Given the following code fragment, what is the output? Int x=5; If x > 5) Cout << "x is bigger than 5. "; Cout <<"That is all. "; Cout << "Goodbye\n";

Given the following code fragment, and an input value of 3, what is the output that is generated? Int x; Cout <<"Enter a value\n"; Cin >> x; Ifx=0) { Cout << "x is zero\n"; } Else { Cout << "x is not zero\n"; }

Given the following code fragment and the input value of 2.0, what output is generated? Float tax; Float total; Cout << "enter the cost of the item\n"; Cin >> total; If total >= 3.0) { Tax = 0.10; Cout << total + total * tax) << endl; } Else { Cout << total << endl; }

What is the final value of x after the following fragment of code executes? Int x=0; Do { X++; }whilex > 0) ;

Given the following code fragment, what is the final value of y? Int x, y; X = -1; Y = 0; Whilex <= 3) { Y += 2; X += 1; }

Executing one or more statements one or more times is known as:

What is the output of the following code fragment? Int x=0; While x < 5) Cout << x << endl; X ++; Cout << x << endl;

Given the following code fragment, which of the following expressions is always true? Int x; Cin >> x;

Given the following code fragment and the input value of 4.0, what output is generated? Float tax; Float total; Cout << "enter the cost of the item\n"; Cin >> total; If total >= 3.0) { Tax = 0.10; Cout << total + total * tax) << endl; } Else { Cout << total << endl; }

What is the advantage of the C++11 integer data types over the old data types?