question

Which of the following declares an integer instance variable? a. private dimes int; b. private int dimes; c. private Int dimes; d. private Integer dimes;

answer

b. private int dimes;

question

Given: Scanner keyboard = new Scanner(System.in); int answer; which statement will take the user input and set the variable answer to that value? a. answer = keyboard; b. answer = (int)keyboard; c. answer = keyboard.nextInt(); d. answer = Scanner.keyboard.nextInt();

answer

c. answer = keyboard.nextInt();

question

In the statement: new BankAccount(1585940, 200, "John","Smith"); the values in the parentheses are called... a. definers b. construction parameters c. definition values d. method return type

answer

b. construction parameters

question

Local variables die when.. a. the object is no longer in use b. the method exists c. you explicitly delete them d. the program ends

answer

b. the method exists

question

A method that performs some action other than returning a value is called a ____ method. a. null b. void c. public d. private

answer

b. void

question

A variable whose meaning is confined to an object of a class is called: a. instance variable b. local variable c. global variable

answer

a. instance variable

question

A variable whose meaning is confined to a method definition is called ____. a . instance variable b. local variable c. global variable

answer

b. local variable

question

The name of a method and the list of _____ types in the heading of the method definition is called the method signature. a. parameter b. argument c. return d. primitive

answer

a. parameter

question

True or False. Method overloading is when two or more methods of the same class have the same name but differ in number or types of parameters.

answer

True

question

True or False. A value of a class type is called an object or an instance of the class.

answer

True

question

Which of the following NOT correct? a. String greeting="hello"'; System.out.println(greeting); b. String greeting="hello";int n=greeting.length(); c. String greeting="hello"; System.out.println(greeting.length()); d. String greeting="hello"; int k=greeting.length;

answer

d. String greeting="hello"; int k=greeting.length;

question

What is the return type of the following method: public void getBalance(String name, int accountNr) a. The method does not return a value b. String c. int d. public

answer

a. The method does not return a value

question

Suppose that you have class BankAccount: public class BankAccount{ private double balance; public void withdraw(double amount){balance=balance-amount;} public void deposit(double amount){balance=balance+amount;} and main class containing the following code: BankAccount account=new BankAccount(); deposit(5000); withdraw(1000); deposit(5000); withdraw(2000); what is the balance of the account? a. 7000 b. 1100 c. The syntax is wrong d. 1000

answer

c. The syntax is wrong

question

Suppose that BankAccount class looks like: public class BankAccount{private double balance; public void withdraw(double amount){balance=balance-amount;} public void monthlyFee(){ //code} } What's the correct way of implementing monthlyFee method? a. this.withdraw(10); b. withdraw(10); c. none of the above d. a and b

answer

d. a and b

question

Examine the code below: int d; Random generator=new Random(); int d=generator.nextInt(6); What is the range of d? a. [0,1,2,3,4,5] b. [0,1,2,3,4,5,6] c. [1,2,3,4,5] d. [1,2,3,4,5,6]

answer

a. [0,1,2,3,4,5]

question

The method toString() is a public member of the class ___. a. Object b. String c. Writer d. Output

answer

a. Object

question

Which of the following is a valid statement? a. String name("Doe"); b. String("Doe"); c. String name = "Doe"; d. name = new String;

answer

c. String name = "Doe";

question

Given the method heading public static String exampleMethod(int n, char ch) What is the return type of the value returned? a. int b. char c. String d. Nothing will be returned

answer

c. String

question

True or False. The return statement must be the last line of the method.

answer

False

question

True or False. The class Object is directly or indirectly the superclass of every class in Java.

answer

True

question

True or False. The new operator can be used to create an object.

answer

True

question

A static method is one that can be used with a _____. a. instance variable b. local variable c. global variable d. the class name as a calling object

answer

d. the class name as a calling object

question

Only ____ copy/copies of a static variable are available to objects of a class. a. one b. two c. three d. none of the above

answer

a. one

question

All of these are methods of Java's Math class except: a. pow b. min c. random d. toString

answer

d. toString

question

The Math method that returns the nearest whole number that is greater than or equal to its argument is: a. round b. ceil c. floor d. none of the above

answer

b. ceil

question

All of the following are wrapper classes except: a. String b. Integer c. Character d. Double

answer

a. String

question

The method trim of the String class trims off: a. Leading white space b. Trailing white space c. Leading and trailing white space d. Blanks

answer

c. Leading and trailing white space

question

When you use the assignment operator with variables of a class type, you are assigning a: a. value b. primitive type c. local variable d. reference

answer

d. reference

question

True or False. You may use methods of the Math class without an import statement.

answer

True

question

True or False. Wrapper classes are provided for all primitive Java types except Boolean.

answer

False

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