Deck 7: User-Defined Methods

Question 1

When a program executes, the first statement to execute is always the first statement in the main method.

Answer 1

True

Question 2

Void methods use the return statement to return the value 0.

Answer 2

False

Question 3

Methods are also called modules.

Answer 3

True

Question 4

A local identifier is an identifier that is declared within a method or block and that is visible only within that method or block.

Question 5

In order to use the method isUpperCase of the class Character, the package java.lang must be explicitly imported.

Question 6

Strings assigned to StringBuffer variables can be altered.

Question 7

Just like the nesting of loops, Java allows the nesting of methods.

Question 8

You can use the class String to pass strings as parameters to a method and change the actual parameter.

Question 9

The return statement must be the last line of the method.

Question 10

The word static is a return type in Java.

Question 11

Void methods must have at least one parameter.

Question 12

To use a predefined method, you must know the code in the body of the method.

Question 13

If a formal parameter is a variable of a primitive data type, then after copying the value of the actual parameter, there is no connection between the formal and actual parameter.

Question 14

An identifier can be declared anywhere including within a class, and outside of every method definition (and every block).

Question 15

In Java, return is a reserved word.

Question 16

The class Math is contained in the package java.math.

Question 17

Reference variables as parameters allow you to return more than one value from a method.

Question 18

Suppose that the following statement is included in a program.import static java.lang.Math.*;After this statement, a static method of the class Math can be called using just the method name.

Question 19

An actual parameter is a variable or expression listed in a method call.

Question 20

Actual and formal parameters have a one-to-one correspondence.

Question 21

How can a method send a primitive value back to the caller?

A) It cannot send primitive values back to the caller
B) By using the return statement
C) By assigning the value to one of its parameters
D) It can call its caller with the value

Question 22

Which of the following is NOT true about return statements?

A) A value-returning method returns its value via the return statement.
B) return statements can be used in void methods to return values.
C) A method can have more than one return statement.
D) Whenever a return statement executes in a method, the remaining statements are skipped and the method exits.

Question 23

public static char methodHeading(int n, double num)Which of the following statements about the method heading in the accompanying figure is NOT true?

A) The method has two parameters.
B) The method cannot be used outside the class.
C) methodHeading is an identifier giving a name to this specific method.
D) It is a value-returning method of type char.

Question 24

All the methods defined in a class must have different names.

Question 25

public static double secret(int first, double second)
{
Double temp; if (second > first)
Temp = first * second;
Else
Temp = first - second; return temp;
}What is the return type of the method in the accompanying figure?

A) public
B) int
C) void
D) double

Question 26

The signature of a method consists of only its formal parameter list.

Question 27

Within a method, an identifier used to name a variable in the outer block of the method can be used to name any other variable in an inner block of the method.

Question 28

public int mystery(int x, int y)
{
If (x >= y)
Return x - y;
Else
Return x + y;
}Based on the code in the accompanying figure, what would be the output of the following statement?System.out.println(mystery(8, mystery(2, 1));

A) 5
B) 7
C) 11
D) 13

Question 29

public int mystery(int x, int y)
{
If (x >= y)
Return x - y;
Else
Return x + y;
}Based on the code in the accompanying figure, what would be the output of the following statement?System.out.println(mystery(8,7));

A) 1
B) 7
C) 8
D) 15

Question 30

What is an actual parameter?

A) The value passed into a method by a method call
B) The value returned by a method
C) The type of the method
D) A variable declared in the method heading

Question 31

public static double secret(int first, double second)
{
Double temp; if (second > first)
Temp = first * second;
Else
Temp = first - second; return temp;
}Which of the following is a valid call to the method in the accompanying figure?

A) secret(5, 4.8);
B) secret(int 5, double 4.8);
C) secret(int x, double y);
D) public static int secret(5, 4.8);

Question 32

public static double secret(int first, double second)
{
Double temp; if (second > first)
Temp = first * second;
Else
Temp = first - second; return temp;
}Based on the code in the accompanying figure, what would be the output of the following statement?System.out.println(secret(5, 7.0));

A) 5.0
B) 7.0
C) 2.0
D) 35.0

Question 33

public static double secret(int first, double second)
{
Double temp; if (second > first)
Temp = first * second;
Else
Temp = first - second; return temp;
}What is the name of the method in the accompanying figure?

A) first
B) second
C) secret
D) double

Question 34

Which of the following statements is NOT true?

A) Reference variables do not directly contain the data.
B) Reference variables contain the address of the memory space where the data is stored.
C) The operator new must always be used to allocate space of a specific type, regardless of the type.
D) A String variable is actually a reference variable of the type String.

Question 35

Java allows the programmer to declare a variable in the initialization statement of the for statement.

Question 36

Formal parameters of primitive data types provide ____ between actual parameters and formal parameters.

A) a one-way link
B) a two-way link
C) a three-way link
D) no link

Question 37

Which modifier is used to specify that a method cannot be used outside a class?

A) public
B) abstract
C) static
D) private

Question 38

Two methods are said to have different formal parameter lists if both methods have a different number of formal parameters, or if the data types of the formal parameters are the same.

Question 39

public static double secret(int first, double second)
{
Double temp; if (second > first)
Temp = first * second;
Else
Temp = first - second; return temp;
}Which of the following is NOT part of the heading of the method in the accompanying figure?

A) public
B) static
C) secret(int first, double second)
D) double temp;

Question 40

public static char methodHeading(int n, double num)Based on the method heading in the accompanying figure, what is the return type of the value returned?

A) static
B) char
C) int
D) num

Question 41

public class scopeRule //Line 1
{ //Line 2
Static double intRate = 0.055; //Line 3
Static String name; //Line 4
Static int t; //Line 5 public static int main(String[] args) //Line 6
{ //Line 7
Int first; //Line 8
Double u, t; //Line 9
String str; //Line 10
//... //Line 11
} //Line 12 public static int first(int x, int y) //Line 13
{ //Line 14
Int t; //Line 15
//... //Line 16
} public static double salary; //Line 17 public static void funcOne(int first, double x) //Line 18
{ //Line 19
Char ch; //Line 20
Int y; //Line 21
//block one //Line 22
{ //Line 23
Int u = 18; //Line 24
//... //Line 25
} //end block one //Line 26
} //Line 27
} //Line 28Which of the following is an example of a local identifier in the example seen in the accompanying figure?

A) intRate (Line 3)
B) name (Line 4)
C) salary (Line 17)
D) t (line 15)

Question 42

The technique to solve a problem by subdividing into smaller problems is known as divide-and- conquer and ____ design approach.

A) top-down
B) bottom-up
C) leveled
D) driver and stub

Question 43

public class scopeRule //Line 1
{ //Line 2
Static double intRate = 0.055; //Line 3
Static String name; //Line 4
Static int t; //Line 5 public static int main(String[] args) //Line 6
{ //Line 7
Int first; //Line 8
Double u, t; //Line 9
String str; //Line 10
//... //Line 11
} //Line 12 public static int first(int x, int y) //Line 13
{ //Line 14
Int t; //Line 15
//... //Line 16
} public static double salary; //Line 17 public static void funcOne(int first, double x) //Line 18
{ //Line 19
Char ch; //Line 20
Int y; //Line 21
//block one //Line 22
{ //Line 23
Int u = 18; //Line 24
//... //Line 25
} //end block one //Line 26
} //Line 27
} //Line 28Which of the following identifiers seen in the accompanying figure is visible in block one?

A) name (Line 4)
B) t (Line 9)
C) local variables of main
D) x (Line 13)

Question 44

int larger(int x, int y)Given the method heading in the accompanying figure, which of the following would be an incorrect demonstration of method overloading?

A) int larger(int a, int b)
B) int larger(int x, int y, int z)
C) double larger(double x, double y)
D) char larger(char x, char y, char z)

Question 45

public class scopeRule //Line 1
{ //Line 2
Static double intRate = 0.055; //Line 3
Static String name; //Line 4
Static int t; //Line 5 public static int main(String[] args) //Line 6
{ //Line 7
Int first; //Line 8
Double u, t; //Line 9
String str; //Line 10
//... //Line 11
} //Line 12 public static int first(int x, int y) //Line 13
{ //Line 14
Int t; //Line 15
//... //Line 16
} public static double salary; //Line 17 public static void funcOne(int first, double x) //Line 18
{ //Line 19
Char ch; //Line 20
Int y; //Line 21
//block one //Line 22
{ //Line 23
Int u = 18; //Line 24
//... //Line 25
} //end block one //Line 26
} //Line 27
} //Line 28Which of the following identifiers seen in the accompanying figure is visible in method first?

A) intRate (Line 3)
B) local variables of method funcOne
C) u (Line 24)
D) first (Line 8)

Question 46

int larger(int x, int y)Given the method heading in the accompanying figure, which of the following does NOT demonstrate method overloading?

A) int larger(int x, int y, int z)
B) int larger(char x)
C) int max(int x, int y)
D) double larger(double x, double y)

Question 47

Which of the following statements about strings is NOT true?

A) When you use the assignment operator to assign a string to a String variable, the computer allocates memory space large enough to store the string.
B) When a string is assigned to a String variable, the string cannot be changed.
C) The class String contains many methods that allow you to change an existing string.
D) A String variable is actually a reference variable.

Question 48

public class scopeRule //Line 1
{ //Line 2
Static double intRate = 0.055; //Line 3
Static String name; //Line 4
Static int t; //Line 5 public static int main(String[] args) //Line 6
{ //Line 7
Int first; //Line 8
Double u, t; //Line 9
String str; //Line 10
//... //Line 11
} //Line 12 public static int first(int x, int y) //Line 13
{ //Line 14
Int t; //Line 15
//... //Line 16
} public static double salary; //Line 17 public static void funcOne(int first, double x) //Line 18
{ //Line 19
Char ch; //Line 20
Int y; //Line 21
//block one //Line 22
{ //Line 23
Int u = 18; //Line 24
//... //Line 25
} //end block one //Line 26
} //Line 27
} //Line 28Which of the following identifiers seen in the accompanying figure is NOT visible in method funcOne?

A) intRate (Line 3)
B) u (Line 24)
C) salary (Line 17)
D) first (Line 13)

Question 49

The program that tests a method is called a ____ program.

A) tester
B) driver
C) stub
D) debugging

Question 50

public class scopeRule //Line 1
{ //Line 2
Static double intRate = 0.055; //Line 3
Static String name; //Line 4
Static int t; //Line 5 public static int main(String[] args) //Line 6
{ //Line 7
Int first; //Line 8
Double u, t; //Line 9
String str; //Line 10
//... //Line 11
} //Line 12 public static int first(int x, int y) //Line 13
{ //Line 14
Int t; //Line 15
//... //Line 16
} public static double salary; //Line 17 public static void funcOne(int first, double x) //Line 18
{ //Line 19
Char ch; //Line 20
Int y; //Line 21
//block one //Line 22
{ //Line 23
Int u = 18; //Line 24
//... //Line 25
} //end block one //Line 26
} //Line 27
} //Line 28Which of the following identifiers seen in the accompanying figure is visible in main?

A) t (Line 5)
B) salary (Line 17)
C) local variables of method funcOne
D) All identifiers are visible in main.