Question 1

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

Accepted Answer

Local variables are only accessible within the method in which they are declared and their values are lost once the method finishes executing. They are not retained between different calls to the method.

Question 2

Which of the following is not a part of the method header?
A) return type
B) method name
C) parentheses
D) semicolon

Accepted Answer

The method header consists of the return type, method name, and parentheses that may contain parameters, but it does not include a semicolon at the end.

Question 3

What will be the result of the following code? 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 or str will be changed

Accepted Answer

The code will cause an error because "Num" is incorrectly capitalized and "string str" is not a valid parameter for Integer.parseInt. The correct usage should be "num = Integer.parseInt(str) + 5;".

Question 4

Given the following method header,which of the method calls would be an error? public void displayValues(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) they would all give an error

Accepted Answer

The method expects a double and an int. In option C, 'a' is a short and 'b' is a long, which cannot be automatically converted to double and int respectively.

Question 5

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 calling method
D) uses the declaration of the argument

Accepted Answer

The receiving parameter variable is declared in the method header inside the parentheses when an argument value is passed to a method.

Question 6

When writing the 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

Accepted Answer

When writing documentation comments for a method, you can provide a description of each parameter by using the @param tag, followed by the name of the parameter and a description of its purpose in the method. This helps other developers understand the purpose and use of each parameter in the method.

Question 7

A value-returning method must specify this as its return type in the method header.
A) an int
B) a double
C) a boolean
D) any valid data type

Accepted Answer

A value-returning method can return any valid data type, so specifying the return type as "D) any valid data type" allows for maximum flexibility in the method's functionality.

Question 8

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

Accepted Answer

Integer.parseInt(str) is a value-returning method that converts the string "555" to an integer value.

Question 9

Local variables can be initialized with
A) constants
B) parameter values
C) the results of an arithmetic operation
D) any of the above

Accepted Answer

Local variables can be initialized with constants, parameter values, and the result of an arithmetic operation, so any of the above is a valid option for initialization.

Question 10

Which of the following would be a valid method call for the following method? 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);

Accepted Answer

The method showProduct expects a double and an int as arguments. Option D passes a double (3.3) and an int (55), which matches the method's parameter types.

Question 11

Which of the following is included in a method call?
A) return type
B) method modifiers
C) parentheses
D) return variable

Accepted Answer

A method call includes parentheses that contain any arguments being passed into the method. Return type, method modifiers, and return variable are aspects of the method declaration, but are not part of the method call.

Question 12

The process of breaking a problem down into smaller pieces is called
A) functional decomposition
B) scientific method
C) top-down programming
D) whole-into-part

Accepted Answer

Functional decomposition is the process of breaking down a problem into smaller, more manageable pieces or functions. This approach allows for easier problem-solving and programming by focusing on individual components first before integrating them into a larger system. The scientific method is a systematic approach to scientific inquiry, while top-down programming is a coding approach where the program is designed from high-level to low-level details. Whole-into-part is not a commonly used term in computer science or problem-solving approaches.

Question 13

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 (as an integer)
C) 8.0
D) This is an error

Accepted Answer

The return type of the method is int, but the value being returned is a Double object. This will result in a compilation error.

Question 14

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 performs a specific task

Accepted Answer

A method is a collection of statements that performs a specific task. It is a block of code that is defined once and can be called multiple times from different parts of the program, which makes the code more modular and reusable. Options A, B, and C are not accurate definitions of a method.

Question 15

Assume that the following method header is for a method in class A. public void displayValue(int value)
Assume that the following code segments appear in another method,also in class A.Which contains a legal call to the displayValue method?
A) int x = 7;
Void displayValue(x);
B) int x = 7;
DisplayValue(x);
C) int x = 7;
DisplayValue(int x);
D) int x = 7;
DisplayValue(x)

Accepted Answer

The method call should match the method name exactly, including case sensitivity, and should pass an integer argument. "DisplayValue(x);" is the correct call since it matches the method name "displayValue" and passes an integer variable 'x'.

Question 16

This type of method performs a task and then terminates.
A) value-returning
B) void
C) local
D) simple

Accepted Answer

The void method performs a task but does not return any value, and it terminates after completing the task.

Question 17

To document the return value of a method,use this in a documentation comment.
A) The @param tag
B) The @comment tag
C) The @return tag
D) The @returnValue tag

Accepted Answer

The @return tag is specifically used to document the return value of a method. It is the best and most appropriate choice to use for this purpose. The other tags, @param and @comment, are used to document parameters and general comments respectively. The @returnValue tag does not exist.

Question 18

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) Both of the above
D) do nothing,the called program will take care of the throws clause

Accepted Answer

If a method calls another method that has a throws clause in its signature, then the calling method must handle the exception or declare it in its own throws clause. Therefore, both options A and B are correct, and the correct answer is C. Option D is incorrect because the calling program should not assume that the called program will handle the exception; it must be handled or declared in the calling method as well.

Question 19

Breaking a program down into small manageable methods
A) makes problems more easily solved
B) allows for code reuse
C) simplifies programs
D) all of the above

Accepted Answer

Breaking a program down into small methods makes problems more easily solved, allows for code reuse, and simplifies programs. By breaking a program into smaller pieces, it becomes more manageable, easier to reason about, and simpler to test and debug. Additionally, code reuse becomes possible when small, highly focused methods can be used in multiple parts of a program, reducing duplication and increasing overall efficiency.

Question 20

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.

Accepted Answer

Writing comments just before the method's definition is the best practice as it helps in understanding the purpose of the method before diving into its details. It also helps in documentation generation tools to pick up the comments easily.

Quiz 5: Methods

Values stored in local variables

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

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

Given the following method header,which of the method calls would be an error? public void displayValues(double x,int y)

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

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

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

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

Local variables can be initialized with

Which of the following would be a valid method call for the following method? public static void showProduct(double num1,int num2) { Double product; Product = num1 * num2; System.out.println("The product is " + Product) ; }

Which of the following is included in a method call?

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

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

In a general sense,a method is

Assume that the following method header is for a method in class A. public void displayValue(int value) Assume that the following code segments appear in another method,also in class A.Which contains a legal call to the displayValue method?

This type of method performs a task and then terminates.

To document the return value of a method,use this in a documentation comment.

Any method that calls a method with a throws clause in its header must

Breaking a program down into small manageable methods

You should always document a method by writing comments that appear