Chapter 7 - "Characters, Strings, and the StringBuffer

Name:

Multiple Choice: Identify the choice that best completes the statement or answers the question.

Which of the following would you use to compare the contents of two Strings?

A.	equals( )	C.	isEqual( )
B.	==	D.	=

What is the output of the following program?

public class Test {
   public static void main(String[] args) {
       String s1 = "Testing";
       String s2 = "testing";
       String s3 = s1.toLowerCase();
       if (s2.equals(s3))
         System.out.println("true");
       else
         System.out.println("false");
   }
}

A.	true	C.	Testing
B.	false	D.	testing

Which of the following would you use to compare strings without considering case?

A.	==	C.	equals( )
B.	equalsIgnoreCase( )	D.	isEqual( )

The output of the following program is ____.

public class Test {
public static void main(String[] args) {
      String s1 = "Programs";
      String s2 = "programs";
      if (s1.equalsIgnoreCase(s2))
         System.out.println("True");
      else
         System.out.println("False");
}
}

A.	programs	C.	False
B.	True	D.	Programs

The value of n after the following program executes is ____.

public class Test {
public static void main(String[] args) {
      String s1 = "Programs";
      String s2 = "Progress";
      int n = s1.compareTo(s2);
      System.out.println(n);
}
}

A.	0	C.	positive value
B.	false	D.	negative value

The output of the following program is ____.

public class Test {
public static void main(String[] args) {
    String name = "Jack Smith";
    int i = name.indexOf(' ');
    System.out.println("i = " + i);
}
}

A.	i = -1	C.	i = 4
B.	i = 3	D.	i = 5

What is the value of c after the following code executes?

String s = "Application";
char c = s.charAt(5);

A.	i	C.	a
B.	l	D.	c

What is the value of result?

String s = "Programming";
boolean result = s.startsWith("Program");

A.	0	C.	true
B.	1	D.	false

What is the value of s2 after the following statements execute?

String s = "AAABBBCCCDDD";
String s2 = s.replace('C', 'X');

A.	"AAABBBXXXDDD"	C.	"AAABBBXCCDDD"
B.	"AAABBBCCCDDDXXX"	D.	"AAABBBXXXCCCDDD"

10.

The output of the following program is ____.

public class Test {
public static void main(String[] args) {
     String location = "downtown";
     int j = location.indexOf('l');
     System.out.println("j = " + j);
}
}

A.	j = -1	C.	j = 4
B.	j = 0	D.	j = 8

11.

The output of the following program is ____.

public class Test {
public static void main(String[] args) {
      String s1 = "A simple program";
      boolean b = s1.startsWith("A simple program");
      System.out.println("b = " + b);
}
}

A.	b = true	C.	b = -1
B.	b = false	D.	b = 1

12.

What is the output of the following program?

public class Test {
public static void main(String[] args) {
    String myString = "A class about strings";
    String myString2 = myString.substring(0, 13) + " main";
    System.out.println(myString2);
}
}

A.	A class about strings	C.	A class main
B.	A class about main	D.	A class aboutmain

13.

What is the output of the following program?

public class Test {
public static void main(String[] args) {
StringBuffer sb = new StringBuffer("Testing with a String Buffer");
System.out.println("The length of the string is: " + sb.length());
}
}

A.	The length of the string is: 29
B.	The length of the string is: 26
C.	The length of the string is: 27
D.	The length of the string is: 28

14.

The output of the following program is ____.

public class Test {
public static void main(String[] args) {
      StringBuffer sb = new StringBuffer("This is a test!");
      sb.setLength(10);
      System.out.println(sb);
}
}

A.	This is a	C.	This is a t
B.	This is a test!	D.	This is

15.

The output of the following program is ____.

public class Test {
public static void main(String[] args) {
StringBuffer sb = new StringBuffer("This is a test!");
System.out.println("The capacity of the string is: " + sb.capacity());
}
}

A.	The capacity of the string is: 15
B.	The capacity of the string is: 31
C.	The capacity of the string is: 16
D.	The capacity of the string is: 14