Deck 22: Bits, Characters, C Strings and Structs

Question 1

Evaluate 00001000 & 11000101 ) ^ 11110000 ).

A) 00001101
B) 11000000
C) 00111101
D) 11110000

Answer 1

D

Question 2

Arrays are:

A) Always passed by reference.
B) Passed by reference unless inside a structure.
C) Passed by reference unless their elements are structures.
D) Always passed by value.

Answer 2

B

Question 3

The strtol and stroul functions do not:

A) Need a header file to be used.
B) Take three arguments.
C) Have the same return types.
D) Have the ability to return data in base 8.

Answer 3

C

Question 4

A bit field must be declared as a:

A) int or unsigned.
B) char.
C) float.
D) long.

Question 5

Two structure variables of the same type with the same member values, when compared will:

A) Always compare equally.
B) Never compare equally.
C) Sometimes compare equally.
D) Result in a compile error.

Question 6

Which is the proper way to create an array of structure variables of type Data?

A) MyArray Data[ 10 ]
B) Data MyArray[ 10 ];
C) Data struct myArray[ 10 ];
D) struct MyArray[ Data ];

Question 7

The most basic unit of data on a computer is the:

A) Bit.
B) Byte.
C) File.
D) int.

Question 8

The isxdigit function would return false on:

A) a
B) A
C) 2
D) g

Question 9

__________ is not allowed.

A) Accessing individual bits in a multi-bit bit field.
B) Padding a bit field with bits that cannot be accessed.
C) Having an unnamed bit field.
D) Having a bit field with a zero width.

Question 10

For any nonzero 8-bit x, which of the following does not result in zero?

A) x &= ~x )
B) x ^= x
C) x <<= 8
D) x |= x

Question 11

The advantages of using typedef do not include:

A) Making programs more portable by allowing data types to be easily changed to meet system specifications.
B) Making type names shorter.
C) Making programs more readable.
D) Increasing the efficiency of accessing struct member variables.

Question 12

Structure variables may not be initialized by:

A) Assigning user-defined values in the struct definition.
B) Assigning values to individual data members.
C) Array-like member initializer lists.
D) Assigning the value of another structure variable of the same type.

Question 13

Typedef is used to:

A) Create a type name that is an alias for another type name.
B) Make a struct private.
C) Cast one struct to another type.
D) Initialize struct members.

Question 14

Let x be an unsigned int on a machine with 4-byte unsigned ints. What effect does
X>>=1;
X<<=1;
Have?

A) There is no effect.
B) The leftmost bit of x is set to 0.
C) The rightmost bit of x is set to 0.
D) Both b) and c).

Question 15

Let Bit1 = Bit2 = 1. Which of the following does not have the same result as the others?

A) Bit1 & Bit2
B) Bit1 | Bit2
C) Bit1 ^ Bit2
D) ~ ~Bit2 )

Question 16

The main difference between structures and classes is:

A) Whether they default to public or private access.
B) How they access member variables.
C) That classes always require new be used with them while structures do not.
D) There is no difference between structures and classes.

Question 17

The number of bits in a bit field is specified with:

A) Parentheses as in bitfield 4 )
B) A colon as in bitfield : 4
C) Brackets as in bitfield[ 4 ]
D) A dot as in bitfield.4

Question 18

The functions of the character-handling library typically manipulate characters as:

A) ints
B) floats
C) longs
D) chars

Question 19

Which of the following is not a bitwise operator?

A) ^
B) >>
C) ~
D) *

Question 20

Structure variable declarations can be incorporated into a structure definition by placing a comma-separated list of variable names:

A) After struct StructureName and before the left brace.
B) After the left brace and before the member declarations.
C) After the member declarations and before the right brace.
D) After the right brace and before the semicolon.

Question 21

What is the output of the following statement?
Cout << strspn"Cows like to moo.", "Ceik losw");

A) Nothing.
B) 10.
C) 8.
D)
E)

Question 22

Which function would be the most useful for determining if a certain word is contained in a string representing a sentence?

A) strcspn.
B) strchr.
C) strstr.
D) strrchr.

Question 23

To change the string "ABCDEFGHI" to "aaaaaFGHI" you would use the _________ function.

A) memset
B) memcmp
C) memchr
D) memcopy

Question 24

The ___________ function allows characters of one part of a string to be copied into another, overlapping part of the same string.

A) memchr
B) memcmp
C) memcpy
D) memmove

Question 25

Memcmp would return ___________ for the call memcmp"Hi, how are you?", "Hi, how are things?", 6).

A) 1
B) A positive number.
C) 0
D) A negative number.

Question 26

The main difference between the functions atof, atoi and atol is:

A) Their return types.
B) Their arguments.
C) Their header files.
D) Their efficiency.