Module: | Core Architecture, Basics & Control Flow
Q6: Consider the following statements regarding Java's security and robustness mechanisms:
1. Java significantly enhances memory security by entirely removing the concept of programmer-accessible explicit pointers.
2. The robustness of Java is supported by its strict compile-time type checking, runtime type checking, and mandatory exception handling frameworks.
3. The Java Virtual Machine relies on the developer to manually invoke the Garbage Collector interface to securely free up unreferenced object memory.
Which of the above statements is/are correct?
2. The robustness of Java is supported by its strict compile-time type checking, runtime type checking, and mandatory exception handling frameworks.
3. The Java Virtual Machine relies on the developer to manually invoke the Garbage Collector interface to securely free up unreferenced object memory.
Which of the above statements is/are correct?
✅ Correct Answer: A
🎯 Quick Answer:
The correct combination is 1 and 2. Statement 3 is incorrect because Garbage Collection in Java is an automated background process executed by the JVM; developers cannot forcefully mandate immediate garbage collection.Structural Breakdown: Security mechanisms include the absence of pointers, a bytecode verifier (to check for illegal code before execution), and a ClassLoader sandbox.
Robustness mechanisms include automatic garbage collection, strongly typed variables, and structured exception handling constructs like try-catch-finally blocks.
Historical/Related Context: Languages prior to Java, such as C and C++, gave developers direct access to physical memory addresses via pointers.
This often resulted in catastrophic errors like buffer overflows and unauthorized memory corruption, which Java's creators intentionally engineered out of the language to ensure safer network distribution.
Causal Reasoning: Removing explicit pointers means a malicious programmer cannot arbitrarily calculate and access the memory addresses of other running programs or operating system functions, inherently isolating the Java application in a secure execution sandbox.