Java Programming Quiz

Which of the following correctly declares an int variable in Java?

• int number = 5.0;

• int number = 5;

• int number = '5';

• int number = true;

What is the size of a double data type in Java?

• 2 bytes

• 4 bytes

• 8 bytes

• 16 bytes

What is the default value of a boolean data type in Java?

• true

• false

• 0

• 1

Which of the following represents a valid char declaration in Java?

• char letter = "A";

• char letter = 'A';

• char letter = 65;

• Both B and C

What is the maximum value that an int data type can hold in Java?

• 2,147,483,647

• 4,294,967,295

• 9,223,372,036,854,775,807

• 1,000,000

Which of the following is a valid double literal in Java?

• double value = 5;

• double value = 5.0;

• double value = 5.0f;

• double value = "5.0";

Which statement correctly compares two boolean variables, a and b, in Java?

• if (a = b)

• if (a == b)

• if (a.equals(b))

• if (a != b)

Which escape sequence is used to represent a newline character in a char variable?

• \n

• \t

• \b

• \\

How would you cast an int to a double in Java?

• int a = 5; double b = a;

• int a = 5; double b = (double) a;

• int a = 5; double b = (int) a;

• int a = 5; double b = double(a);

What is the correct way to check if a char variable ch is equal to 'A' in Java?

• if (ch = 'A')

• if (ch == "A")

• if (ch == 'A')

• if (ch equals 'A')