Question 1

Which of the following statements describes block scope?

Accepted Answer

A) It begins at the opening { of the class declaration and terminates at the closing } 
B) It limits label scope to only the method in which it is declared. 
C) It begins at the identifier's declaration and ends at the terminating right brace (}). 
D) It is valid for one statement only.

Question 2

Which statement is false?

Accepted Answer

A) If a method does not return a value,the return-value-type in the method declaration can be omitted. 
B) Placing a semicolon after the right parenthesis enclosing the parameter list of a method declaration is a syntax error. 
C) Redeclaring a method parameter as a local variable in the method's body is a compilation error. 
D) Forgetting to return a value from a method that should return a value is a compilation error.

Question 3

To declare a method as static,place the keyword static before ________ in the method's declaration.

Accepted Answer

A) the method modifier. 
B) the return type. 
C) the method name. 
D) the argument list.

Question 4

Stacks are known as ________ data structures.

Accepted Answer

A) FIFO. 
B) FILO. 
C) LIFO. 
D) LILO.

Question 5

When an object is concatenated with a String:

Accepted Answer

A) a compilation error occurs. 
B) a runtime error occurs. 
C) the object's toString method is implicitly called to obtain the String representation of the object. 
D) the object's class name is used.

Question 6

A static method can ________.

Accepted Answer

A) call only other static methods of the same class directly. 
B) manipulate only static fields in the same class directly. 
C) be called using the class name and a dot (. ). 
D) All of the above.

Question 7

Which statement below could be used to simulate the outputs of tossing a quarter to get heads or tails? Suppose randomNumbers is a Random object.

Accepted Answer

A) randomNumbers.nextInt( 7 ); 
B) randomNumbers.nextInt( 2 ); 
C) randomNumbers.nextInt( 1 ); 
D) randomNumbers.nextInt( 25 );

Question 8

Any field declared with keyword ________ is constant.

Accepted Answer

A) static. 
B) const. 
C) constant. 
D) final.

Question 9

Which of the following methods are overloaded with respect to one another? public int max ( int a,int b ){ … }
Public double max ( double a,double b ){ … }
Public int max ( int a,int b,int c ){ … }
Public double max ( double a,double b,double c ){ … }

Accepted Answer

A) A and B are overloaded;C and D are overloaded. 
B) A and C are overloaded;B and D are overloaded. 
C) A,B and C are overloaded. 
D) All these four methods are overloaded.

Question 10

An overloaded method is one that

Accepted Answer

A) has a different name than another method,but the same parameters. 
B) has the same name as another method,but different parameters (by number,types or order of the types). 
C) has the same name and parameters as a method defined in another class. 
D) has the same name and parameters,but a different return type as another method.

Question 11

You can set a Random object's seed at any time during program execution by calling the object's ________ methods.

Accepted Answer

A) changeSeed. 
B) setSeed. 
C) resetSeed. 
D) updateSeed.

Question 12

Which is a correct static method call of Math class method sqrt?

Accepted Answer

A) sqrt( 900 );. 
B) math.sqrt( 900 );. 
C) Math.sqrt( 900 );. 
D) Math math = new Math();math.sqrt( 900 );.

Question 13

Which of the following can be an argument to a method?

Accepted Answer

A) Constants. 
B) Variables. 
C) Expressions. 
D) All of the above.

Question 14

Programs designed for maintainability are constructed from small simple pieces or modules.Modules in Java are called:

Accepted Answer

A) methods. 
B) classes. 
C) arguments. 
D) both methods and classes.

Question 15

Which of the following methods is not in the Math class?

Accepted Answer

A) ceil. 
B) abs. 
C) parseInt. 
D) log.

Question 16

Which of these statements best defines scope?

Accepted Answer

A) Scope refers to the classes that have access to a variable. 
B) Scope determines whether a variable's value can be altered. 
C) Scoping allows the programmer to use a class without using its fully qualified name. 
D) Scope is the portion of a program that can refer to an entity by its simple name.

Question 17

The parameter list in the method header and the arguments in the method call must agree in:

Accepted Answer

A) number 
B) type 
C) order 
D) all of the above

Question 18

Identifiers in Java have ________ and ________ scopes?

Accepted Answer

A) method,class. 
B) class,block. 
C) block,statement. 
D) statement,file.

Question 19

In a class containing methods with the same name,the methods are distinguished by:

Accepted Answer

A) Number of arguments. 
B) Types of arguments. 
C) Return type. 
D) (a)and (b). 
E) (b)and (c).

Question 20

Consider the following Java statements: int x = 9;
Double y = 5.3;
Result = calculateValue( x,y );
Which of the following statements is false?

Accepted Answer

A) A method is called with its name and parentheses. 
B) x and y are parameters. 
C) Copies of x and y are passed to the method calculateValue. 
D) x and y are arguments.

Exam 6: Methods: a Deeper Look