9th-2 TEST Q1

Which company developed Java?

• Google
• Microsoft
• Oracle
• IBM
• Sun Microsystems

What is the name of the online compiler used in this class for Java programs?

• OnlineGDB
• CompileJava
• Replit
• JDoodle
• CodeChef

Which of the following is NOT a valid Java identifier?

• myNumber

• number1

• _result!

• totalSum

• 2total

Which of the following is a correct single-line comment in Java?

• # This is a comment in Python
• # This is a comment in Ruby
• $This is a Java Comment

• /* This is a comment in C++ */
• // This is a comment in Java

Which of these is the correct syntax to declare a floating-point number in Java?

• int myFloat = 5.5f;
• double myFloat = 5.5f;
• float myFloat = 5.5d;
• float myFloat = 5.5;
• float myFloat = 5.5f;

Which of the following data types is used to store a true or false value in Java?

• char

• String

• float

• int

• boolean

Which data type should be used for a decimal number like 3.1416?

• boolean
• float
• char
• string
• int

What is the correct syntax to display a variable’s value in Java?

• print(variable);
• Console.WriteLine(variable);
• System.out.print(variable);
• echo variable;
• System.out.println(variable);

What is the default value of a boolean variable in Java?

• undefined

• true

• 0

• false

• null

Which statement about Java is TRUE?

• Java is platform-independent.
• Java is only used for web development.
• Java requires a specific operating system to run.
• Java is a low-level programming language.