Learn Java from Scratch - A Beginner's Guide - Step 02 - Java Integer Data Types - Puzzles - Octal, Hexadecimal, Post- a

This video tutorial explores integer representations in Java, including byte, short, int, and long types. It covers octal and hexadecimal number systems, common errors, and the importance of understanding these systems. The tutorial also explains explicit and implicit casting, and the use of increment and decrement operators, providing practical examples and advice for avoiding code complexity.

Which of the following is a valid octal number in Java?

• 012

• 0X12

• 12

• 0B12

What error occurs when you try to store the number 08 in an octal variable?

• Runtime error

• Logical error

• No error

• Syntax error

What is the maximum value that can be stored in a short variable in Java?

• 65535

• 127

• 32767

• 2147483647

What is explicit casting in Java?

• Automatically converting a larger type to a smaller type

• Manually converting a larger type to a smaller type

• Manually converting a smaller type to a larger type

• Automatically converting a smaller type to a larger type

Which of the following is an example of implicit casting?

• int i = (int) 3.14;

• long l = 1000L;

• short s = 100;

• byte b = (byte) 128;

In a post-increment operation, when is the variable incremented?

• Before the operation

• After the operation

• During the operation

• It is not incremented

What will be the value of J after executing the following code: int I = 10; int J = ++I;?

• 11

• 9

• 10

• 12