C++ Quiz 10

2) To test whether a character is a printable character, use this function. A) isprint B) isprintable C) isprintok D) isoktoprint E) None of these

A

25) After the following statement executes, what value is stored in the variable num? num = atoi("1000"); A) 1000 B) 999 (1000 minus 1 for the null terminator) C) "1000" D) "thousand" E) None of these

A

8) This function accepts a C-string as an argument and converts the string to a long integer. A) atol B) strlong C) strtolong D) stringlong E) None of these

A

6) The strcpy function's arguments are: A) two C-strings B) two addresses C) three pointers D) one array and one pointer E) None of these

B

11) This function will return true if its argument is a printable character other than a digit, letter, or space. A) isprint B) ispunct C) ischar D) isnotdls E) None of these

B

18) To determine whether a character is whitespace, use this function. A) iswhite B) isspace C) iswhitespace D) isblank E) None of these

B

19) To change a character argument from lower to upper case, use this function. A) isupper B) toupper C) tolarge D) fromlower E) None of these

B

20) What is the output of the following statement? cout << tolower(toupper('Z')) << endl; A) upper case Z B) lower case z C) a lower case z followed by an upper case Z D) a compiler error E) None of these

B

24) This function accepts pointers to two C-strings and an integer argument, which indicates how many characters to copy from the second C-string to the first. A) strcpy B) strncpy C) copystring D) strintcpy E) None of these

B

29) Which of the following lines of code defines an array of C-strings that will hold 49 characters and the null terminator? A) char [49]; B) char str[50]; C) char[50] str; D) character str[50]; E) None of the above

B

30) The statement: char var1 = tolower('A'); will result in: A) var1 storing the character value 'A'. B) var1 storing the ASCII value for lower case 'a'. C) A is output to the monitor. D) a is output to the monitor. E) None of these

B

7) A library function that can find one C- string inside another is: A) strcmp B) strstr C) strfind D) strsearch E) None of these

B

22) To use the strlen function in a program, you must also write #include ________. A) <strlen> B) <iostring> C) <cstring> D) <stringlib> E) None of these

C

10) Which statement converts the string "10" to the integer value 10? A) itoa("ten") B) atoi("ten") C) atoi("10") D) itoa(10) E) None of these

C

12) The C-string company[12] can hold ________. A) twelve characters B) thirteen characters C) eleven characters and the null terminator D) twelve characters and the null terminator E) None of the above

C

15) A practical application of this function is to allow a user to enter a response of 'y' or 'Y' to a prompt. A) tolower B) toupper C) A or B D) ignorecase E) None of these

C

16) This function accepts a C-string containing a number as its argument and returns the integer equivalent. A) strToInt B) itoa C) atoi D) int_from E) None of these

C

21) In C++, a C-string is a sequence of characters stored in consecutive memory, terminated by a ________. A) period B) space C) null character D) semicolon E) None of these

C

23) This function concatenates the contents of one C-string with another C-string. A) strcopy B) strappend C) strcat D) stradd E) None of these

C

28) To define a C-string that will store students' last names of up to 25 characters in length, which is an appropriate statement? A) char lastName[25]; B) string lastName[25]; C) char lastName[26]; D) string lastName[24]; E) None of these

C

3) This is the escape sequence representing the null terminator. A) \n B) \t C) \0 D) nullptr E) None of these

C

5) This function accepts a pointer to a C-string as an argument, and it returns the length of the C-string (not including the null terminator). A) numchar B) strlength C) strlen D) countstring E) None of these

C

17) To determine whether a character entered is a letter of the alphabet, use this function. A) isdigit B) fromkeyboard C) alphaok D) isalpha E) None of these

D

13) Look at the following statement. if (!isdigit(var1)) The expression being tested by this statement will evaluate to true if var1 is: A) an alphabetic character B) 9 C) a symbol such as $ or & D) both A and C E) None of these

D

14) "Whitespace" encompasses which of the following? A) tab B) newline C) space D) All of these E) None of these

D

26) To change a lower case character to an upper case character, use this function. A) atoi B) itoa C) ltou D) toupper E) None of these

D

4) The null terminator stands for this ASCII code. A) 57 B) 100 C) 1000 D) 0 E) None of these

D

9) This function converts a C-string to an integer and returns the integer value. A) atoint B) strtoint C) strint D) atoi E) None of these

D

Starting Out with C++ from Control Structures to Objects, 8e (Gaddis) Chapter 10 Characters, C-Strings, and More About the string Class 10.1 Multiple Choice Questions 1) To test whether a character is a numeric digit character, use this function. A) isnumber B) notAlpha C) isnumeric D) isdigit E) None of these

D

27) This library function reverses the order of a C-string. A) reverstr B) strrev C) reversit D) backward E) None of these

E

10.2 True/False Questions 1) True/False: A test using the isupper function will return false if the argument is an uppercase character.

FALSE

12) True/False: Although C++ provides ample library functions to handle numeric values, we must write all of our own functions to manipulate character values.

FALSE

4) True/False: The C++ compiler performs strict array bounds checking when it encounters an array of characters.

FALSE

7) True/False: The strlen function returns a C-string's length and adds one for \0.

FALSE

9) True/False: The ftoa function converts a floating-point value to an ASCII value.

FALSE

10) True/False: If a C-string that cannot be converted to a numeric value is passed to the atoi function, the function's behavior is undefined by C++.

TRUE

11) True/False: If an uppercase character is passed as an argument to toupper, the result will be an uppercase character.

TRUE

13) True/False: You may use the <, >, <=, >=, ==, and != relational operators to compare string objects.

TRUE

14) True/False: C++ 11 introduces a function named to_string that converts a numeric value to a string object.

TRUE

15) True/False: The string class's front and back member functions were introduced in C++ 11.

TRUE

2) True/False: The isdigit function will return a true if its argument is a digit between 0 and 9.

TRUE

3) True/False: When using the strcat function, you must be careful not to overwrite the bounds of an array.

TRUE

5) True/False: The itoa function is similar to atoi, but it works in reverse.

TRUE

6) True/False: By being able to pass arrays as arguments, you can write your own functions for processing C-strings.

TRUE

8) True/False: The C++ library provides functions for converting a string representation of a number to a numeric data type, and vice-versa.

TRUE