1 Consider the effects of String interning and String immuta

1   Consider the effects of String interning and String immutability. After the following code is executed, which of the following statements is/are true?

String s1 = \"Bigfoot\";
String s2 = \"Bigfoot\";
String s3 = new String(\"Bigfoot\");
String s4 = s3;

s1 and s4 refer to the same object in memory
s1 and s2 refer to the same object in memory
s1 and s3 refer to the same object in memory
s3 and s4 refer to the same object in memory
s1.equals(s4) evaluates to true

2 Consider this code, which represents all the code provided for the class:

public class Student {
   private String name;

   public void setName(String name){
        this.name = name;      
   }
}

Is it possible to create an instance of this class using a constructor?

No, because no constructor is provided in the code
Yes, because it will have an implicit constructor
Yes, because the class that needs to create a Student has its own constructor
No, because there are no static methods
Yes, because setName() is a constructor

3 Consider this code:

public class Clown extends Monster {
   private String name;

   public Clown(String nameIn){
        name = nameIn;      
   }
}

What does the method Clown return?

A reference to a String
A copy of a String
A copy of a Clown
Nothing
A reference to a Clown

4 Which of the following is correct?

getters are also called accessors
setters are also called accessors
getters are also called mutators
constructors are also called mutators
accessors are usually static

5 Consider this method:

public void showName(){

    System.out.println(name);

}

Which of the following is correct?

This method is a constructor
This method is a setter
This method is a mutator
This method is static
None of the above

Solution

1)s1 and s2refers to the same object in memory is true and also s1.equals(s4) returns true

2)yes ,because it will have an implicit constructor

3)Clown returns a reference to Clown

4) getters are also called accessors

5)None of the above