Deck 8: Text Processing and Wrapper Classes

Question 1

Which of the following statements will display the maximum value that a double can hold?

A) System.out.println(Double.MAX_VALUE);
B) System.out.println(Double.MAXIMUM_VALUE);
C) System.out.println(Double.MAX_VAL);
D) System.out.println((MAX_VALUE));

Answer 1

A

Question 2

StringBuilder objects are not immutable.

Answer 2

True

Question 3

Most of the String comparison methods are case sensitive.

Answer 3

True

Question 4

You may cause an off-by-one error when working with a character position within a string if you think of the first position in the string as 1.

Question 5

The String class's valueOf method accepts a string representation as an argument and returns its equivalent integer value.

Question 6

In the __________ file format, when data in a spreadsheet is exported, each row is written to a line and commas are used to separate the values in the cells.

A) comma separated value
B) extensible markup language
C) excel binary
D) data interchange

Question 7

A wrapper class is a class that is "wrapped around" a primitive data type and allows you to create objects instead of variables.

Question 8

When working with the String and StringBuilder classes' getChars method, the character at the start position is included in the substring but the character at the end position is not included.

Question 9

Which of the following import statements is required to use the Character wrapper class?

A) import java.String;
B) import java.lang.Char;
C) import java.Char;
D) No import statement is required

Question 10

A series of words or other items of data, separated by spaces or other characters, are known as

A) strings
B) tokens
C) delimiters
D) captions

Question 11

If a string has more than one character used as a delimiter, you must write a loop to determine the tokens, one for each delimiter character.

Question 12

Which of the following import statements is required to use the StringTokenizer class?

A) import java.util.Scanner;
B) import java.text.DecimalFormat;
C) import java.util.StringTokenizer;
D) import javax.swing.JOptionPane;

Question 13

Which of the following statements converts a double variable named tax to a string and stores the value in the String object named str?

A) String str = Double.toString(tax);
B) String str = double(tax);
C) String str = double.toString(tax);
D) String str = tax.Double.toString(str);

Question 14

Which of the following statements converts an int variable named number to a string and stores the value in the String object variable named str?

A) String str = Integer.toString(number);
B) String str = number.Integer.toString(str);
C) String str = integer(number);
D) String str = integer.toString(number);

Question 15

Trying to extract more tokens than exist from a StringTokenizer object will cause an error.

Question 16

You cannot assign a value to a wrapper class object.

Question 17

Which of the following statements converts a String object variable named str to an int and stores the value in the variable x?

A) int x = Integer.integer(str);
B) int x - str;
C) int x = Integer.parseInteger(str);
D) int x = Integer.parseInt(str);

Question 18

The term __________ is commonly used to refer to a string that is part of another string.

A) nested string
B) literal
C) substring
D) delimiter

Question 19

The String class's regionMatches method performs a case-insensitive comparison.

Question 20

The __________ method returns a copy of the calling String object with all leading and trailing whitespace characters deleted.

A) remove
B) trim
C) compress
D) concat

Question 21

The String class's __________ method accepts a value of any primitive data type as its argument and returns a string representation of the value.

A) trim
B) getChar
C) toString
D) valueOf

Question 22

What will be displayed after the following statements are executed?
String str = "red$green&blue#orange";
String[] tokens = str.split("[$&#]");
For (String s : tokens)
System.out.print(s + " ");

A) red green blue orange
B) red $ green & blue # orange
C) $ & #
D) red[$&#]green[$&#]blue[$&#]orange

Question 23

The __________ class is the wrapper class for the char data type.

A) StringBuilder
B) Integer
C) Character
D) String

Question 24

Which of the following statements is not true about the following code? StringBuilder strb = new StringBuilder("Total number of parts: ");
Strb.insert(23, 32);

A) The starting position for the insert is 23.
B) strb is a StringBuilder type object.
C) The ending position for the insert is 32.
D) The literal number 32 will be inserted into the string.

Question 25

What will be the value of position after the following code is executed? int position;
String str = "The cow jumped over the moon.";
Position = str.indexOf("ov");

A) 14
B) 15
C) 18
D) 17

Question 26

In the following statement, what data type must recField be? str.getChars(5, 10, recField, 0);

A) int
B) char[]
C) char
D) String

Question 27

What will be the value of position after the following code is executed? int position;
String str = "The cow jumped over the moon.";
Position = str.lastIndexOf("ov", 14);

A) 14
B) 1
C) 0
D) -1

Question 28

The StringBuilder class's insert method allows you to insert a(n) __________ into the calling object's string.

A) char array
B) primitive type
C) String object
D) All of these

Question 29

What are the tokens in the following statement?
StringTokenizer st = new StringTokenizer("9-14-2018", "-", true);

A) 9, 14, 2018
B) 9, 14, 2018, and -
C) -
D) None of these

Question 30

You can concatenate String objects by using the

A) concat or trim methods
B) concat method or the + operator
C) concatenate or join methods
D) concatenate method or the + operator

Question 31

Which of the following is(are) used as delimiters if the StringTokenizer class's constructor is called and a reference to a String object is passed as the only argument?

A) space
B) tab
C) newline
D) All of these

Question 32

What will be displayed after the following code is executed?
String str = "abc456";
For (int i = 0; i < str.length(); i++)
{
Char chr = str.CharAt(i);
If (!Character.isLetter(chr))
System.out.print(Character.toUpperCase(chr));
}

A) ABC
B) ABC456
C) 456
D) abc456

Question 33

Any ___________ argument passed to the Character class's toLowerCase method or toUpperCase method is returned as it is.

A) nonletter
B) char
C) string
D) static

Question 34

What will be displayed after the following statements are executed?
StringBuilder strb = new StringBuilder("We have lived in Chicago, Trenton, and Atlanta.");
Strb.replace(17, 24, "Tampa");
System.out.println(strb);

A) We have lived in Tampa, Trenton, and Atlanta.
B) We have lived in Chicago, Trenton, and Tampa.
C) We have lived in Chicago,Tampaon, and Atlanta.
D) We have lived in Chicago, Tampa, and Atlanta.

Question 35

Given the following code, how many times will the while loop be executed? StringTokenizer st = new StringTokenizer("Java programming is fun!");
While (st.hasMoreTokens())
System.out.println(st.nextToken());

A) 7
B) 4
C) 5
D) 1

Question 36

What will be displayed after the following code is executed?
boolean matches;
String str1 = "The cow jumped over the moon.";
String str2 = "moon";
Matches = str1.endsWith(str1);
System.out.println(matches);

A) true
B) moon
C) false
D) The cow

Question 37

The Character wrapper class provides numerous methods for

A) converting objects to primitive data types
B) testing and converting character data
C) testing and converting numeric literals
D) performing operations with named constants

Question 38

What will be displayed after the following code is executed?
StringBuilder strb = new StringBuilder(12);
Strb.append("The cow ");
Strb.append("jumped over the ");
Strb.append("moon.");
System.out.println(strb);

A) The cow
Jumped over the
Moon.
B) The cow jumped over the moon.
C) The cow jump
D) 12The cow jumped over the moon.

Question 39

What will be displayed after the following code is executed?
String str1 = "The quick brown fox jumped over the lazy dog.";
String str2 = str1.substring(20, 26);
System.out.println(str2);

A) n fox
B) jumped
C) lazy d
D) x jump

Question 40

What will be displayed after the following code is executed?
String str = "RSTUVWXYZ";
System.out.println(str.charAt(5));

A) W
B) X
C) V
D) U