What this deck covers
This deck focuses on Calling Class Methods, giving you a quick way to review the definitions, rules, and examples that matter most for AP Computer Science a.
AP Computer Science a Flashcards: Calling Class Methods
Study Calling Class Methods in AP Computer Science a with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.
AP Computer Science a
Calling Class Methods
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QUESTION
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Can a static method call another static method?
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ANSWER
Yes, it can. Static methods can invoke other static methods directly.
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Flashcard 1: Can a static method call another static method?
Answer: Yes, it can. Static methods can invoke other static methods directly.
Flashcard 2: How do you call a static method from a different package?
Answer: Import the class, then call ClassName.methodName();. Import statement provides access to external classes.
Flashcard 3: What is the result of calling a non-static method using the class name?
Answer: Compilation error. Non-static methods require an instance to be called.
Flashcard 4: What happens if you call a static method with a null reference?
Answer: No error; static method is called on class. Static methods belong to class, not instance.
Flashcard 5: Which method is called automatically when a Java program starts?
Answer: main method. Entry point for Java program execution.
Flashcard 6: State the syntax for calling a static method in Java.
Answer: ClassName.methodName();. Standard format for accessing class-level methods.
Flashcard 7: Can a static method be abstract?
Answer: No, it cannot. Abstract requires overriding, but static prevents inheritance.
Flashcard 8: Can static methods access instance variables directly?
Answer: No, they cannot. Instance variables belong to objects, not the class.
Flashcard 9: How do you call a static method from a class?
Answer: ClassName.methodName();. Uses dot notation with class name, no object needed.
Flashcard 10: How do you call a static method from a different package?
Answer: Import the class, then call ClassName.methodName();. Import statement provides access to external classes.
Flashcard 11: Identify the error: public void static print() {}
Answer: Incorrect order; should be public static void print() {}. Modifiers must follow specific order: access, static, return.
Flashcard 12: What type of methods can be called without creating an object?
Answer: Static methods. Class methods don't require object instantiation.
Flashcard 13: Identify the error: static void display() { this.show(); }
Answer: Cannot use 'this' in a static method. 'this' refers to instance, not available in static context.
Flashcard 14: Can a static method access a static variable?
Answer: Yes, it can. Static methods can access other static members.
Flashcard 15: Can a static method call a non-static method directly?
Answer: No, it cannot. Static context cannot access instance methods directly.
Flashcard 16: What keyword is used to define a class method?
Answer: static. Makes method belong to class rather than instances.
Flashcard 17: How do you call a static method from a class?
Answer: ClassName.methodName();. Uses dot notation with class name, no object needed.
Flashcard 18: Can static methods be overridden?
Answer: No, they can be hidden but not overridden. Static methods are resolved at compile-time, not runtime.
Flashcard 19: What keyword is used to define a class method?
Answer: static. Makes method belong to class rather than instances.
Flashcard 20: Identify the error: public void static print() {}
Answer: Incorrect order; should be public static void print() {}. Modifiers must follow specific order: access, static, return.
Flashcard 21: What type of methods can be called without creating an object?
Answer: Static methods. Class methods don't require object instantiation.
Flashcard 22: What is the result of calling a non-static method using the class name?
Answer: Compilation error. Non-static methods require an instance to be called.
Flashcard 23: How do you call the main method of another class?
Answer: OtherClass.main(args);. Main method is static, so use class name to call.
Flashcard 24: Can a static method be overloaded?
Answer: Yes, it can. Multiple static methods can have same name, different parameters.
Flashcard 25: State the syntax for calling a static method in Java.
Answer: ClassName.methodName();. Standard format for accessing class-level methods.
Flashcard 26: How do you call the main method of another class?
Answer: OtherClass.main(args);. Main method is static, so use class name to call.
Flashcard 27: Which method is called automatically when a Java program starts?
Answer: main method. Entry point for Java program execution.
Flashcard 28: Can a static method have a return type?
Answer: Yes, it can. Static methods can return values like any method.
Flashcard 29: Identify the error: static int calculate() return 0;
Answer: Missing curly braces. Method body requires braces around statements.
Flashcard 30: Can a static method call a non-static method directly?
Answer: No, it cannot. Static context cannot access instance methods directly.
Flashcard 31: What is the signature of the main method in Java?
Answer: public static void main(String[] args). Required format for Java application entry point.
Flashcard 32: Can a static method be abstract?
Answer: No, it cannot. Abstract requires overriding, but static prevents inheritance.
Flashcard 33: Can a static method be overloaded?
Answer: Yes, it can. Multiple static methods can have same name, different parameters.
Flashcard 34: Can a static method call another static method?
Answer: Yes, it can. Static methods can invoke other static methods directly.
Flashcard 35: What are the parameters of the main method in Java?
Answer: String[] args. Command-line arguments passed to program.
Flashcard 36: What is the scope of a static method?
Answer: Class level. Belongs to the class, shared across all instances.
Flashcard 37: What are the parameters of the main method in Java?
Answer: String[] args. Command-line arguments passed to program.
Flashcard 38: Can static methods be overridden?
Answer: No, they can be hidden but not overridden. Static methods are resolved at compile-time, not runtime.
Flashcard 39: What is the signature of the main method in Java?
Answer: public static void main(String[] args). Required format for Java application entry point.
Flashcard 40: Can static methods access instance variables directly?
Answer: No, they cannot. Instance variables belong to objects, not the class.
Flashcard 41: What happens if you call a static method with a null reference?
Answer: No error; static method is called on class. Static methods belong to class, not instance.
Flashcard 42: Can a static method have a return type?
Answer: Yes, it can. Static methods can return values like any method.
Flashcard 43: Identify the error: static int calculate() return 0;
Answer: Missing curly braces. Method body requires braces around statements.
Flashcard 44: Identify the error: static void display() { this.show(); }
Answer: Cannot use 'this' in a static method. 'this' refers to instance, not available in static context.
Flashcard 45: Can a static method access a static variable?
Answer: Yes, it can. Static methods can access other static members.