Java Programming 1 Quiz 2 (Chapter 2)

Which operator is used to concatenate two or more strings?

+

What output is produced by these statements? String name = "Joanne Hunt"; ...

11

What is the output of the following code snippet? System.out.printf("%5.3f", 20.0);

20.000

What is the meaning of x = 0; in Java?

It sets the variable x to zero.

Which one of the following statements gives the absolute value of the floating-point number x = -.25.50

Math.abs(x);

Which one of the following statements displays the output as 54321.00?

System.out.printf("%8.2f", 54321.0);

Which of the given System.out.print statements generates the following output? ABCDE"\

System.out.println("ABCDE\"\\");

What happens to the fractional part when a division is performed on two integer variables?

The fractional part is discarded.

What is wrong with the following code snippet? int price; price = 9.42;

The price variable is assigned a decimal value.

Which statement is true?

When declaring a variable, you also specify the type of its values

Which of the following is an assignment statement?

a = 20;

Which is the Java equivalent of the following mathematical expression? c = √(a2 + b2)

c = Math.sqrt(Math.pow(a, 2) + Math.pow(b, 2));

Which of the following statements can be used to get the fifth character from a string str?

char c = str.charAt(4);

In an airline reservation system, which data type should be used to store the cost of an airline ticket?

double

Which of the following options declares a float variable?

float age;

The assignment operator ______________________.

places a new value into a variable

How do you compute the length of the string str?

str.length()

How do you extract the first 5 characters from the string str?

str.substring(0, 5)

Which one of the following statements can be used to extract the last five characters from any string ...

str.substring(str.length() - 5, str.length())

The first step in problem solving is ______________________.

to understand the problem and its inputs and outputs