Exam 1: Review of Java Fundamentals

Write a for-loop that will print all the positive integers from 100 down to 1,inclusive,one number per line.

In order to declare a named constant,the declaration must use which Java keyword?

Integer literals beginning with the digit 0 are interpreted to be in decimal notation.

If an int is added to a float,the result will be an int.

All classes extend which built-in class?

What will happen when you try to run a program that has a syntax error?

Which of the following loop headers will arrange for the loop body to execute exactly 10 times?

Which type of loop is guaranteed to execute its body at least once?

The Java expression (75 - 63)* 10 / 6 - 1 evaluates to 19.

A leap year occurs when the year number is divisible by 4.But there is a special case for years ending in 00: these must be divisible by 400 to be considered a leap year.Thus,1900 was not a leap year,but 2000 was.Write an if-statement that determines if the integer variable year represents a leap year.(Hint: use the % operator for taking remainders. )

What feature of Java transforms class objects into a sequence of bytes that may be used by another program?

Suppose c1 and c2 are objects of the class Circle.A Circle has a single data member,its radius.The Circle class has a default constructor (implemented correctly),but no other methods have been defined in the implementation of the Circle class.What will happen when we try to execute this code? Circle c1 = new Circle(12.0); Circle c2 = new Circle(12.0); Boolean same = (c1.equals(c2));

Suppose a String variable s is initialized to the value "inheritance".What value is returned by the call s.substring(2,5)?

Comments beginning with the characters // can extend for multiple lines until the compiler encounters \\.

Suppose x and y are int variables.Write a statement that declares the boolean variable between,and sets this variable equal to true if the value of y is between 0 and x,inclusive,and equal to false otherwise.(Assume that you don't know if x is positive or negative. )

The Java expression 9 / 5 + 9 % 5 equals ______.

What type of Java statement allows you to use classes contained in other packages?

Suppose c is a variable of type char.We want to know if c is a lowercase vowel letter (a/e/i/o/u).What is wrong with the following comparison? if (c == 'a' || 'e' || 'i' || 'o' || 'u')

Which access modifier,used when defining a method,indicates that only one such method is available for all instances of the class?

Suppose a is a one-dimensional array of double.Show how you would find the largest element of a using Java code.