Podcast
Questions and Answers
Which of the following statements about constructors is correct?
Which of the following statements about constructors is correct?
- Constructors can return values just like methods.
- Constructors must have a void return type.
- Constructors can have a return type specified.
- Constructors cannot specify a return type. (correct)
In a class that does not explicitly declare a constructor, what type of constructor is provided by the compiler?
In a class that does not explicitly declare a constructor, what type of constructor is provided by the compiler?
- Public constructor
- Void constructor
- Default constructor (correct)
- Private constructor
What happens in a class that declares a constructor and does not have a default constructor?
What happens in a class that declares a constructor and does not have a default constructor?
- The class cannot be instantiated.
- The default constructor is added by the compiler.
- The class does not need a constructor.
- An error occurs due to missing default constructor. (correct)
When can you access the default constructor of a class?
When can you access the default constructor of a class?
Which is true about constructors compared to methods?
Which is true about constructors compared to methods?
What happens if a class declares a constructor without specifying a return type?
What happens if a class declares a constructor without specifying a return type?
What is the default initialization value for a boolean instance variable?
What is the default initialization value for a boolean instance variable?
If a reference-type instance variable is not explicitly initialized, what value does it default to?
If a reference-type instance variable is not explicitly initialized, what value does it default to?
What does the statement 'double balance = 1000.53' demonstrate in Java?
What does the statement 'double balance = 1000.53' demonstrate in Java?
In Java, local variables are initialized by default. (True/False)
In Java, local variables are initialized by default. (True/False)
What is used in Java to store the addresses of objects in memory?
What is used in Java to store the addresses of objects in memory?
When calling methods on an object, what is required in Java?
When calling methods on an object, what is required in Java?
What is the purpose of a constructor in Java?
What is the purpose of a constructor in Java?
How is a constructor different from a method in Java?
How is a constructor different from a method in Java?
What is true about the declaration of a constructor in Java?
What is true about the declaration of a constructor in Java?
Why do primitive-type variables in Java cannot be used to call methods?
Why do primitive-type variables in Java cannot be used to call methods?
When an object of class Account is created, what is the default initial value for the instance variable name?
When an object of class Account is created, what is the default initial value for the instance variable name?
What should you provide if you want to initialize an object of a class with specific values in Java?
What should you provide if you want to initialize an object of a class with specific values in Java?
