Java Language Fundamentals Flashcards

What is the range of a Java 'byte' data type?

Answer: -128 to 127

The byte type is an 8-bit signed integer with a range of -128 to 127.

What is the output of the following? int a = 10; int b = 3; System.out.println(a % b);

Answer: 1

The % operator returns the remainder; 10 divided by 3 is 3 with a remainder of 1.

Which statement about 'var' in Java 11 is correct?

Answer: var can be used for local variable type inference

In Java 10+, 'var' enables local variable type inference, allowing the compiler to infer the type from the initializer.

What happens when you compare two String objects using == in Java?

Answer: It compares their memory references

The == operator on objects compares references, not content; use .equals() to compare String content.

What is the result of the expression: (int) 9.99?

Answer: 9

Casting a double to int truncates (not rounds) the decimal part, so (int)9.99 yields 9.

Which access modifier allows access only within the same class?

Answer: private

The 'private' access modifier restricts access to only the class in which the member is declared.

What is printed by this code? for (int i = 0; i < 3; i++) { if (i == 1) continue; System.out.print(i + " "); }

Answer: 0 2

The 'continue' statement skips the current iteration when i==1, so only 0 and 2 are printed.