Core Java Programming Course- Java Development Kit (JDK) 10 Installation

The video tutorial introduces Java 10, highlighting its new features, particularly the VAR keyword for variable declaration. It explains how VAR can be used for both primitive data types and objects, and discusses its limitations, such as not being usable for class-level fields or method parameters. The tutorial also covers scenarios where VAR cannot be used, like array initialization with initial assignments. The video concludes with a brief mention of future updates in Java 10.

What is the primary new feature introduced in Java 10 regarding variable declaration?

• The introduction of a new data type called 'num'.

• The ability to declare variables without specifying a type using 'var'.

• The requirement to declare all variables as 'final'.

• The removal of primitive data types.

How does Java determine the type of a variable declared with 'var'?

• It defaults to the 'Object' type.

• It relies on the value assigned to the variable.

• It requires a separate type declaration statement.

• It uses the variable name to infer the type.

In Java 10, how can 'var' be used when creating objects?

• It cannot be used for object creation.

• It requires explicit type casting.

• It can only be used with primitive types.

• It can replace the reference type in object creation.

What is a potential drawback of using 'var' in method calls?

• It makes the code run slower.

• It can obscure the return type of the method.

• It limits the number of methods that can be called.

• It requires more memory.

Why can't 'var' be used for array initialization with values?

• The array initializer needs an explicit target type.

• Arrays must be declared as 'final'.

• The array size must be specified explicitly.

• Java does not support arrays with 'var'.

Where is 'var' not allowed in Java 10?

• For class-level fields.

• Inside method bodies.

• In loop declarations.

• For local variables.

Can 'var' be used for method parameters in Java 10?

• Yes, it can be used for all parameters.

• No, parameters require explicit data types.

• Only for primitive type parameters.

• Only for object type parameters.