Java Test 1 || 6th

What is a method in Java?

• A method in Java is a way to create new classes.

• A method in Java is a block of code that performs a specific task and is defined within a class.

• A method in Java is a type of variable that stores data.

• A method in Java is a class that contains multiple objects.

How do you define parameters in a Java method?

• Parameters must be defined as global variables before the method.

• Parameters in a Java method are defined by specifying their type and name in the method's parentheses.

• Parameters are defined by using only their names in the method's parentheses.

• You can define parameters anywhere in the method body.

What is the purpose of a return value in a method?

• The purpose of a return value in a method is to provide a result back to the caller.

• To specify the method's name.

• To store data temporarily during method execution.

• To define the method's access level.

How can you handle exceptions in Java?

• Use try-catch blocks

• Use switch-case statements

• Use if-else statements

• Ignore exceptions and continue execution without handling them.

What is the syntax for a try-catch block?

• try { /* code that may throw an error */ } catch (e) { /* handle error */ }

• try { /* code */ } catch { /* handle */ }

• try { /* code that may throw an exception */ } catch (ExceptionType e) { /* code to handle the exception */ }

• try { /* risky code */ } finally { /* cleanup code */ }

What is the role of the finally block in exception handling?

• The finally block is used to catch exceptions before they propagate.

• The finally block is optional and does not affect the execution flow.

• The finally block ensures that specific code runs after try and catch blocks, regardless of exceptions.

• The finally block can only execute if an exception occurs.

How do you return a value from a method?

• Use the 'output' statement to display a value.

• Assign the value to a variable without returning it.

• Call the method without any parameters to get the value.

• Use the 'return' statement followed by the value.

What is the does the 'void' keyword in a method do?

• A method does not return any value.

• A placeholder for future return types.

• A method will return a value.

• Used to define a variable type.

How do you concatenate two strings in Java?

• Use StringBuilder.append() method

• Use '+' operator or String.concat() method.

• Use String.append() method

• Use '-' operator

What method would you use to find the length of a string?

• .getLength()

• Count the characters manually.

• .size()

• .length()