Which component of the Java Development Environment is responsible for executing bytecode instructions by converting them into machine-specific code at runtime?
Option B is correct. The Java Virtual Machine (JVM) is an abstract computing machine that enables a computer to run a Java program by interpreting or JIT-compiling Java bytecode into native machine code.
In Java, what is the exact memory size allocated for the primitive data type 'char'?
Option A is correct. In Java, 'char' is a 16-bit (2 bytes) unsigned primitive type because Java uses Unicode character set representation to support internationalization.
Which keyword in Java is used by a class to inherit properties and methods from a single superclass?
Option A is correct. The 'extends' keyword is used in Java class declarations to establish an inheritance relationship (IS-A) from a single parent class.
Why does Java NOT support multiple inheritance through classes?
Option C is correct. Java omits multiple class inheritance to avoid method resolution ambiguity (Diamond Problem). Instead, Java supports multiple inheritance of type through interfaces.
Which implicit reference variable in Java refers directly to the immediate parent class object?
Option A is correct. The 'super' keyword in Java is a reference variable used to invoke parent class constructors, access overridden parent methods, or access hidden parent fields.