Question 1

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?

Accepted Answer

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)

Question 2

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

Accepted Answer

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

Question 3

The lifetime of a method's local variable is:

Accepted Answer

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 4

When you pass an argument to a method, be sure that the argument's data type is compatible with:

Accepted Answer

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

Question 5

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

Accepted Answer

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

Question 6

Which of the following values can be passed to a method that has an int parameter variable?

Accepted Answer

A)  float 
B)  double 
C)  long 
D)  All of the above 
E)  None of the above

Question 7

All @param tags in a method's documentation comment must:

Accepted Answer

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

Question 8

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

Accepted Answer

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

Question 9

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

Accepted Answer

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

Question 10

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

Accepted Answer

A) True 
 B)False

Question 11

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

Accepted Answer

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.

Question 12

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.

Accepted Answer

A) True 
 B)False

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

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

Accepted Answer

A) True 
 B)False

Question 15

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

Accepted Answer

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

Question 16

This part of a method is a collection of statements that are performed when the method is executed.

Accepted Answer

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

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

Local variables can be initialized with:

Accepted Answer

A)  constants 
B)  parameter values 
C)  the results of an arithmetic operation 
D)  any of the above

Question 19

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

Accepted Answer

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 20

Breaking a program down into small manageable methods:

Accepted Answer

A)  makes problems more easily solved 
B)  allows for code reuse 
C)  simplifies programs 
D)  all of the above

Exam 5: Methods

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?

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

The lifetime of a method's local variable is:

When you pass an argument to a method, be sure that the argument's data type is compatible with:

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

Which of the following values can be passed to a method that has an int parameter variable?

All @param tags in a method's documentation comment must:

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

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

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

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

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.

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

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

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

This part of a method is a collection of statements that are performed when the method is executed.

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

Local variables can be initialized with:

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

Breaking a program down into small manageable methods: