Deck 5: Methods

Question 1

A __________ is a part of a method that contains a collection of statements that are performed when the method is executed.

A) method header
B) return type
C) method body
D) method modifier

Answer 1

C

Question 2

Two general categories of methods are void methods and value-returning methods.

Answer 2

True

Question 3

In the header, the method name is always followed by __________.

A) parentheses
B) a return type
C) a data type
D) braces

Answer 3

A

Question 4

To create a method, you must write its __________.

A) header
B) return type
C) body
D) definition

Question 5

Which type of method performs a task and sends a value back to the code that called it?

A) value-returning
B) void
C) complex
D) local

Question 6

You must have a return statement in a value-returning method.

Question 7

Methods are commonly used to break a problem into small manageable pieces.

Question 8

In the method header the static method modifier means the method is available to code outside the class.

Question 9

Which of the following is not a part of a method call?

A) method name
B) return type
C) parentheses
D) All of these

Question 10

If method A calls method B, and method B calls method C, and method C calls method D, when method D finishes, what happens?

A)Control is returned to method A.
B)Control is returned to method B.
C)Control is returned to method C.
D)The program terminates.

Question 11

A parameter variable's scope is the method in which the parameter is declared.

Question 12

Constants, variables, and the values of expressions may be passed as arguments to a method.

Question 13

The expression in a return statement can be any expression that has a value.

Question 14

Methods are commonly used to:

A) speed up the compilation of a program
B) break a program down into small manageable pieces
C) emphasize certain parts of the logic
D) document the program

Question 15

No statement outside the method in which a parameter variable is declared can access the parameter by its name.

Question 16

A value-returning method can return a reference to a non-primitive type.

Question 17

In the method header, the method modifier public means that the method belongs to the class, not a specific object.

Question 18

Any method that calls a method with a throws clause in its header must either handle the potential exception or have the same throws clause.

Question 19

Only constants and variables may be passed as arguments to methods.

Question 20

In the following code, System.out.println(num) is an example of __________. double num = 5.4;
System.out.println(num);
Num = 0.0;

A) a value-returning method
B) a void method
C) a complex method
D) a local variable

Question 21

In a @return tag statement the description __________.

A) cannot be longer than one line
B) describes the return value
C) must be longer than one line
D) describes the parameter values

Question 22

In a general sense, a method is __________.

A) a plan
B) a statement inside a loop
C) a comment
D) a collection of statements that perform a specific task

Question 23

Given the following method header, which of these method calls is incorrect? public void displayValue(double x, int y);

A) displayValue(a, b); // where a is a long and b is a byte
B) displayValue(a, b); // where a is an int and b is a byte
C) displayValue(a, b); // where a is a short and b is a long
D) All of these would give an error.

Question 24

When an object, such as a String, is passed as an argument it is __________.

A) actually a reference to the object that is passed
B) passed by value like any other parameter value
C) encrypted
D) necessary to know exactly how long the string is when writing the program

Question 25

The header of a value-returning method must specify __________.

A) the method's local variable names
B) the name of the variable in the calling method that will receive the returned value
C) the data type of the return value
D) All of these must be specified.

Question 26

Given the following method header, which of these method calls is incorrect? public void displayValue(int x, int y);

A) displayValue(a, b); // where a is a short and b is a byte
B) displayValue(a, b); // where a is an int and b is a byte
C) displayValue(a, b); // where a is a short and b is a long
D) All of these would give an error.

Question 27

When an argument is passed to a method __________.

A) its value is copied into the method's parameter variable
B) its value may be changed within the called method
C) Both (a) and (b) are correct.
D) Neither (a) nor (b) are correct.

Question 28

A __________ type of method performs a task and then terminates.

A) value-returning
B) void
C) local
D) simple

Question 29

A parameter variable's scope is __________.

A) the method in which the parameter is declared
B) the class to which the method belongs
C) the main method
D) All of these are true.

Question 30

You should always document a method by writing comments that appear __________.

A) just before the method's definition
B) just after the method's definition
C) at the end of the file
D) only if the method is more than five lines long

Question 31

A special variable that holds a value being passed into a method is called a(n) __________.

A) modifier
B) parameter
C) alias
D) argument

Question 32

When you pass an argument to a method you should be sure that the argument's type is compatible with __________.

A) the parameter variable's data type
B) the method's return type
C) the version of Java currently used
D) IEEE standards

Question 33

Given the following method, which of these method calls is valid?
public static void showProduct (int num1, double num2)
{
Int product;
Product = num1 * (int)num2;
System.out.println("The product is " + product);
}

A) showProduct(5.5, 4.0);
B) showProduct(10.0, 4);
C) showProduct(10, 4.5);
D) showProduct(33.0, 55.0);

Question 34

Given the following method, which of these method calls is valid?
public static void showProduct (double num1, int num2)
{
Double product;
Product = num1 * num2;
System.out.println("The product is " + product);
}

A) showProduct("5", "40");
B) showProduct(10.0, 4.6);
C) showProduct(10, 4.5);
D) showProduct(3.3, 55);

Question 35

All @param tags in a method's documentation must __________.

A) end with a */
B) appear after the general description of the method
C) appear before the method header
D) span several lines

Question 36

The lifetime of a method's local variable is __________.

A) the duration of the program
B) the duration of the class to which the method belongs
C) the duration of the method that called the local variable's method
D) only while the method is executing

Question 37

When a method tests an argument and returns a true or false value, it should return __________.

A) a zero for true and a one for false
B) a boolean value
C) a zero for false and a non-zero for true
D) A method should not be used for this.

Question 38

Values that are sent into a method are called __________.

A) variables
B) arguments
C) literals
D) types

Question 39

Which of the following is not part of a method header?

A) return type
B) method name
C) parentheses
D) semicolon

Question 40

A method

A) may have zero or more parameters
B) never has parameter variables
C) must have at least two parameter variables
D) may not have only one parameter variable

Question 41

Select all that apply. Which of the following types of values can be passed to a method that has an int parameter variable?

A) float
B) double
C) long
D) int

Question 42

Select all that apply. Which of the following are benefits of using methods in programming?

A) The program will compile faster.
B) Problems are solved more easily.
C) Code can be reused.
D) Programs are simplified.

Question 43

The process of breaking a problem down into smaller pieces is sometimes called __________.

A) the divide and conquer method
B) the scientific method
C) top-down programming
D) whole-into-part programming

Question 44

When an argument value is passed to a method, the receiving parameter variable is __________.

A) declared within the body of the method
B) declared in the method header inside the parentheses
C) declared in the call
D) used in the declaration of the argument

Question 45

Local variables can be initialized with __________.

A) constants
B) parameter values
C) the result of an arithmetic operation
D) Any of these.

Question 46

Select all that apply. Local variables __________.

A) are hidden from other methods
B) cannot be changed once they are given a value in the method where they exist
C) may have the same name as local variables in other methods
D) lose the values stored in them between calls to the method in which the variable is declared

Question 47

What will be returned from the following method?
public static double methodA()
{
Double a = 8.5 + 9.5;
Return a;
}

A) 18.0
B) 18
C) 8
D) 19

Question 48

When writing documentation comments for a method, you can provide a description of each parameter by using a __________.

A) @comment tag
B) @doc tag
C) @param tag
D) @return tag

Question 49

In the following code, Integer.parseInt(str) is an example of __________. int num;
String str = "555";
Num = Integer.parseInt(str) + 5;

A) a value-returning method
B) a void method
C) a local variable
D) a complex method

Question 50

If you attempt to use a local variable before it has been given a value, __________.

A) a compiler error will occur
B) the local variable will always contain the value 0
C) the results will be unpredictable
D) the local variable will be ignored

Question 51

To document the return value of a method you can use a __________.

A) @comment tag
B) @returnValue tag
C) @param tag
D) @return tag

Question 52

What will be the result after the following code executes? int num;
String str = "555";
Num = Integer.parseInt(string str) + 5;

A) num will be set to 560
B) str will have a value of "560"
C) The last line of code will cause an error.
D) Neither num nor str will be changed.

Question 53

Values stored in local variables __________.

A) are lost between calls to the method in which they are declared
B) retain their values from the last call to the method in which they are declared
C) may be referenced by the calling method
D) may be referenced by any other method if the method in which they are declared is a public method

Question 54

Select all that apply. Any method that calls a method with a throws clause in its header must __________.

A) handle the potential exception
B) have the same throws clause
C) do nothing since the called program will take care of the throws clause
D) contain only string variables

Question 55

A value-returning method must specify __________ as its return type in the method header.

A) an int
B) a double
C) a boolean
D) Any valid data type

Question 56

What will be returned from the following method?
public static int methodA()
{
Double a = 8.5 + 9.5;
Return a;
}

A) 18.0
B) 18
C) 8.0
D) This is an error.