Deck 2: C++ Basics

Question 1

if-else statements that are inside other if-else statements are said to be _______________.

Answer 1

nested

Question 2

Is << used for input or output? ____________

Answer 2

output

Question 3

Every line in a program should have a comment.

Answer 3

False

Question 4

It is legal to declare more than one variable in a single statement.

Question 5

Each time a loop body executes is known as an _______________________.

Question 6

The body of a while loop may never execute.

Question 7

The opposite of less than is greater than

Question 8

Variable names may begin with a number.

Question 9

In the following code fragment,x has the value of 3.
int x = 3;

Question 10

<< is called the stream ____________________ operator.

Question 11

The integer 0 is considered true.

Question 12

What is the correct conditional statement to determine if x is between 19 and 99? __________________

Question 13

The opposite of x >3 && x < 10)is x < 3 && x > 10)

Question 14

The stream that is used for input from the keyboard is called ___________.

Question 15

Loops are used when we need our program to make a choice between two or more things.

Question 16

A loop that always executes the loop body at least once is known as a _____________ loop.

Question 17

What is the opposite of x < 20 && x > 12)? _______________________

Question 18

The body of a do-while loop always executes at least once.

Question 19

int myValue; is called a _______________________.

Question 20

>> is known as the stream ____________ operator.

Question 21

Which of the following statements is NOT legal?

A)char ch='b';
B)char ch='0';
C)char ch=65;
D)char ch="cc";

Question 22

What is the value of x after the following statements?
Int x;
X = x + 30;

A)0
B)30
C)33
D)garbage

Question 23

In a compound logical and &&)expression,the evaluation of the expression stops once one of the terms of the expression is false.This is known as ______________ evaluation.

Question 24

What is the value of x after the following statements?
Int x,y,z;
Y = 10;
Z = 3;
X = y * z + 3;

A)Garbage
B)60
C)30
D)33

Question 25

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

Question 26

What is the output of the following code?
Float value;
Value = 33.5;
Cout << value << endl;

A)33.5
B)33
C)value
D)garbage

Question 27

What is the output of the following code?
Cout << "This is a \\" << endl;

A)This is a
B)This is a \
C)nothing,it is a syntax error
D)This is a \ endl

Question 28

Which of the following is a valid identifier?

A)3com
B)three_com
C)3_com
D)3-com
E)dollar$

Question 29

Which of the following is not a valid identifier?

A)return
B)myInt
C)myInteger
D)total3

Question 30

The stream that is used for output to the screen is called ___________.

Question 31

Another way to write the value 3452211903 is

A)3.452211903e09
B)3.452211903e-09
C)3.452211903x09
D)3452211903e09

Question 32

Which of the following lines correctly reads a value from the keyboard and stores it in the variable named myFloat?

A)cin > > myFloat;
B)cin << myFloat;
C)cin >> "myFloat";
D)cin >> myFloat >> endl;

Question 33

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

Question 34

What is the value of x after the following statements?
Float x;
X = 15/4;

A)3.75
B)4.0
C)3.0
D)60

Question 35

Write the loop condition to continue a while loop as long as x is negative.____________________

Question 36

What is the value of x after the following statements?
Int x;
X = 15 %4;

A)15
B)4
C)3
D)3.75

Question 37

What is the value of x after the following statements?
Int x;
X = 0;
X = x + 30;

A)0
B)30
C)33
D)garbage

Question 38

What is the output of the following code?
Float value;
Value = 33.5;
Cout << "value" << endl;

A)33.5
B)33
C)value
D)garbage

Question 39

When must we use braces to define the body of a contitional expression? ______________

Question 40

What is the value of x after the following statements?
Int x;
X = 15/4;

A)15
B)3
C)4
D)3.75

Question 41

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

Question 42

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";

A)x is bigger than 5.That is all
B)x is bigger than 5
C)That is all.Goodbye
D)Goodbye

Question 43

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";
}
a.x is zero
b.x is not zero
c.unable to determine
d.x is 3

Question 44

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)

Question 45

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

Question 46

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;
}

A)3
B)3.3
C)4.0
D)4.4

Question 47

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

Question 48

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))

Question 49

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

A)selection
B)iteration
C)sequence
D)algorithm

Question 50

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

Question 51

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";
}
}
}

A)small
B)medium
C)large
D)giant

Question 52

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;
}

A)2.2
B)2.0
C)3.1
D)4.4

Question 53

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

Question 54

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.