Computer 10 | Introduction to Java

What is a variable in Java?

• A variable in Java is a container that holds a value, which can be changed during the program's execution.

• A variable in Java is a type of function

• A variable in Java is a special character used for calculations

• A variable in Java is a fixed value that cannot be changed

What are the different data types in Java?

• The different data types in Java are: true, false, and maybe

• The different data types in Java are: primitive data types and reference data types

• The different data types in Java are: numbers, letters, and symbols

• The different data types in Java are: integers, decimals, and fractions

What are the arithmetic operators in Java?

• + (addition), - (subtraction), * (multiplication), / (division), % (modulus), ^ (exponentiation)

• + (addition), - (subtraction), * (multiplication), / (division), & (bitwise AND)

• + (addition), - (subtraction), * (multiplication), / (division), | (bitwise OR)

• + (addition), - (subtraction), * (multiplication), / (division), % (modulus)

What is the purpose of comments in Java?

• to provide explanations or documentation within the code for better understanding

• To make the code run faster

• To change the functionality of the code

• To confuse other developers

What is the basic structure of a Java program?

• The basic structure of a Java program includes a variable declaration, a main method, and statements within square brackets.

• The basic structure of a Java program includes a class declaration, a main method, and statements within curly braces.

• The basic structure of a Java program includes a loop declaration, a main method, and statements within curly braces.

• The basic structure of a Java program includes a function declaration, a main method, and statements within parentheses.

What is the syntax for declaring a variable in Java?

• variableName: type;

• type variableName;

• variableName = type;

• variableName type;

What is the difference between int and double data types in Java?

• The int data type is for floating-point numbers, while the double data type is for integer values.

• The int data type is for integer values, while the double data type is for floating-point numbers.

• The int data type is for text values, while the double data type is for boolean values.

• The int data type is for decimal values, while the double data type is for whole numbers.

A logical operators in Java?

• && (logical AND)

• == (equal to)

• -- (decrement)

• ++ (increment)

What is the use of the 'if' statement in Java?

• The 'if' statement is used to declare a variable in Java

• The 'if' statement is used to create a loop in Java

• The 'if' statement in Java is used to make decisions in the code based on a condition.

• The 'if' statement is used to define a function in Java

What is the purpose of the 'switch' statement in Java?

• The purpose of the 'switch' statement in Java is to define a new class

• The purpose of the 'switch' statement in Java is to handle exceptions

• The purpose of the 'switch' statement in Java is to select one of many code blocks to be executed.

• The purpose of the 'switch' statement in Java is to create a loop