QUESTION $1$

The first character in a String has an index of $1.$

True

False

$4$ points

QUESTION $2$

The Scanner class provides methods for reading various data types from a file.

True

False

$4$ points

QUESTION $3$

If the indexOf method in the String class is unable to find an occurance of a character or String, it will return the value $0$ to signify that it was unable to find anything.

True

False

$4$ points

QUESTION $4$

The $+$ operator is used for String concatenation, among other uses.

True

False

$4$ points

QUESTION $5$

If a class is not in the java.lang package, you can use the import keyword to tell the compiler where to find the class definition.

True

False

$4$ points

QUESTION $6$

To read in an entire line of input from the user, it is necessary to use the next method of the Scanner class.

True

False

$4$ points

QUESTION $7$

Which of the following $($select all correct answers$)$ are identifiers for a method of the String class?

indexOf

charAt

length

substring

$6$ points

QUESTION $8$

Which of the following $($select all correct Answers$)$ will allow you to use the DecimalFormat class in your own program:

import java.text.DecimalFormat;

use DecimalFormat;

import java.lang.$*$;

import java.text.$*$;

$6$ points

QUESTION $9$

What will be the value of the variable letter after the following code is executed:

String name $=$ "Richard";

char letter $=$ name.toLowerCase$().$charAt$(0)$;

$\text{'}$r$\text{'}$

$\text{'}$R$\text{'}$

$"$r$"$

$"$R$"$

$12$ points

QUESTION $10$

What is the value of the variable position after the following code has been executed:

String name $=$ "Lola";

int position $=$ name.toLowerCase$().$indexOf$(\text{'}$l$\text{'})//$ The argument of the indexOf method is the char literal lowecase l

$3$

$2$

$1$

$0$

$12$ points

QUESTION $11$

What will be the output of the following Java code:

System.out.println$("$The sum of $1$ and $7$ is $"+1+7)$;

The sum of $1$ and $7$ is $8$

The sum of $1$ and $7$ is $1+7$

The sum of $1$ and $7$ is $17$

The sum of $1$ and $7$ is $+1+7$

$12$ points

QUESTION $12$

What will be the output of the following Java code:

System.out.println$("$The sum of $8$ and $5$ is $"+(8+5))$;

The sum of $8$ and $5$ is $85$

The sum of $8$ and $5$ is $13$

The sum of $8$ and $5$ is $8+5$

The sum of $8$ and $5$ is $+8+5$

$12$ points

QUESTION $13$

Which of the following methods returns the the index of the first occrance of a specified character in a String:

substring

length

indexOf

charAt

$12$ points

QUESTION $14$

What will be the output of the following Java code:

String s $=$ "Hello World";

System.out.println$($s$.$indexOf$(\text{'}$h$\text{'}))$;

Hello World

$-1$

$1$

$0$

$12$ points

QUESTION $15$

What is the value of the variable result after the following code has been executed:

String name $=$ "James Joyce";

String result $=$ name.toUpperCase$().$substring$($name$.$indexOf$("")+1).$toLowerCase$()$;

James

JAMES

JAMES JOYCE

joyce

JOYCE

james joyce

This code will not actually compile or will produce an error.