Author Archives: Stanislav_Panteleev

🔗 What is a Native Method? A native method is a method declared in Java, but implemented in a language like C or C++. These methods are usually marked with the native keyword, for example: ⚙️ How the JVM Handles … Continue reading →

🔥 Love this question — it shows you’re thinking at system design level! 📜 1. What is the JVM Specification? The JVM Specification (or JVM Spec) is an official document maintained by Oracle. It defines: ✅ What the JVM must … Continue reading →

The Metaspace in the JVM (Java Virtual Machine) is a memory space that was introduced in Java 8, replacing the older PermGen space. Its primary purpose is to store class metadata, which includes information about class structures, methods, fields, annotations, … Continue reading →

🌐 What is Dynamic Linking? In simple words: Dynamic linking means the JVM does not resolve all method calls, field accesses, and class references at compile time — instead, it resolves them at runtime, when the class is actually loaded.

🔥 What is the JVM Instruction Set? The JVM instruction set is the complete set of low-level operations (called bytecode instructions) that the Java Virtual Machine understands and executes. When you write a Java program and compile it, your .java … Continue reading →

🔥 What are Literals in Java? Definition Literals in Java are fixed, constant values that you write directly in your code. These are “hardcoded” values that represent themselves.

What is a Symbolic Link in Bytecode? In the context of Java bytecode (which I assume you’re asking about, since you’re into Java backend development), the term symbolic link can have different meanings depending on the context, but here’s the … Continue reading →

💾 What is the Constant Pool? The constant pool is a table stored inside every .class file. It contains a list of symbolic references used by the class — essentially, all the constants and symbolic metadata the class needs.

📦 What is the Method Area? The Method Area is a part of the JVM Runtime Data Area, and its purpose is to store class-level data. This includes metadata about classes, methods, and fields. It is essentially where the JVM … Continue reading →

💥 What Happens When an Exception is Thrown? When your code executes something like: The JVM does several things: