Java Memory Management

In which programming language does the programmer have explicit control over memory management, including creating and destroying objects?

In Java, primitive variables are stored in the heap.

What is a stack frame in Java?

In Java, objects are primarily stored in the _______, while references to these objects are stored in the stack.

What is the output of the following Java code snippet? int age = 5; int other = 15; System.out.println(other);

When a method is called in Java, a new copy of all variables is created in the stack frame.

In Java, if a primitive variable is passed to a function and modified inside that function, does the original variable's value change after the function call?

When a primitive variable is passed into a method in Java, the method receives a _______ of the variable's value.

Consider the following Java code: `public static void change(int age) { age = 9; }

public static void main(String[] args) { int age = 5; change(age); System.out.println(age); }` What is the output?

When an object is created in Java, it is stored directly in the stack.

What is stored in the stack when an object is created in Java?

In Java, the _______ contains the actual data of objects, while the stack holds the _______ to these objects.

Given a Java class Person with an age field, what is the output of the following code? Person p = new Person(); p.age = 15; System.out.println(p.age);

When an object is passed to a method in Java, any changes made to the object's state inside the method will be reflected outside the method.

Why do changes inside a method affect the original object when an object is passed as a parameter in Java?

When an object is passed to a method in Java, the method receives a _______ of the object's reference.

Consider the following Java code: `class Person { int age = 0; }

public static void change(Person i) { i.age = 9; }

public static void main(String[] args) { Person p = new Person(); p.age = 15; change(p); System.out.println(p.age); }` What will be the output?

Strings in Java are mutable.

What does it mean for a String to be immutable in Java?

In Java, once a String object is created, its value cannot be modified, making it an _______ object.

Given the following Java code snippet: String p = "Pravesh"; public static void change(String i) { i = "Steve"; } change(p); System.out.println(p); What is the output?

In Java, the == operator compares the content of String objects.

What does the == operator compare when used with objects in Java?

To compare the content of two String objects in Java, you should use the ______ method, not the == operator.

What is the output of the following Java code? String p = "pravesh"; String q = "pravesh".toLowerCase(); System.out.println(p == q);

What is the output of the following Java code? String p = "pravesh"; String q = "pravesh".toLowerCase(); System.out.println(p.equals(q));

Match the memory area with its primary purpose in Java:

Which of the following code snippets correctly demonstrates how Java allocates memory for a primitive variable?

What is the primary reason for understanding how Java handles memory management?

Because strings are immutable, Java reuses string literals to point to the same memory location, resulting in memory optimization.

When is a stack frame allocated in Java?

In Java, what happens to the original object when it is passed to a method and modified inside that method?

Why are strings treated specially compared to other objects in Java?

If two strings have the same content, the '==' operator in Java will always return true.

Java automatically handles memory management, relieving developers from manual memory allocation and deallocation.

In Java, the garbage collector reclaims memory from objects that:

Match the concept with appropriate descriptions.

What is a key benefit of Java handling memory management automatically, as opposed to manual memory management in C++?

Given that String objects are immutable, what happens when a new value is assigned to an existing String variable?