Java Fundamentals – Multiple Choice Quiz

Which of the following is a primitive data type in Java?

• String

• ArrayList

• int

• Scanner

What is the correct syntax to declare a double variable with a value of 3.14159?

• double piValue = "3.14159";

• double piValue = 3.14159;

• float piValue = "3.14159";

• int piValue = 3.14159;

What is the key difference between System.out.print() and System.out.printf()?

• print() is faster than printf()

• printf() is used for formatted output

• print() adds a new line after output

• printf() is used for input

Which statement correctly increments a variable x by 1?

• x += 1;

• x--;

• x =+ 1;

• x == 1;

What does a return value in a method do?

• It prints a result

• It exits the program

• It sends a result back to the caller

• It initializes an object

How is a do-while loop different from a while loop?

• It uses an else block

• It checks the condition before running the loop

• It only runs once

• It always runs at least once

What is the output of the following code? System.out.print("Good "); System.out.println("Morning!");

• Good Morning!

• Good

• Morning!

• Good \n Morning!

Which is a key advantage of using an ArrayList over an array?

• ArrayLists can store primitive types directly

• ArrayLists are faster

• ArrayLists have dynamic sizing

• ArrayLists use less memory

What is the output of this loop? for (int j = 5; j >= 1; j--) { System.out.print(j + " "); }

• 1 2 3 4 5

• 5 4 3 2 1

• 5 6 7 8 9

• Error

What is the length of this array? String[] fruits = {"Apple", "Banana", "Cherry", "Date"};

• 3

• 4

• 5

• 0