Quiz8
8.3 Q1: The & operator can be applied to:
Answer: lvalues.
8.9 Q1: Assuming that t is an array and tPtr is a pointer to that array, which expression refers to the address of the fourth element?
Answer: &t[ 3 ].
8.3 Q3: Three of the following expressions have the same value. Which of the following expressions has a value different from the others'?
Answer: *Ptr.
8.8 Q1: Which of the following can have a pointer as an operand?
Answer: ++.
8.8 Q2: Given that k is an integer array starting at location 2000, kPtr is a pointer to k and each integer is stored in 4 bytes of memory, what location does kPtr + 3 point to?
Answer: 2012.
8.5 Q4: What method should be used to pass an array to a function that does not modify the array and only looks at it using array subscript notation:
Answer: A constant pointer to constant data.
8.5 Q3: An array name is:
Answer: A constant pointer to nonconstant data.
8.6 Q2: To follow the principle of least privilege, the selectionSort function should receive the array to be sorted as:
Answer: A constant pointer to nonconstant data.
8.5 Q2: A function that prints a string by using pointer arithmetic such as ++ptr to output each character should have a parameter that is:
Answer: A nonconstant pointer to constant data.
8.5 Q1: A function that modifies an array by using pointer arithmetic such as ++ptr to process every value should have a parameter that is:
Answer: A nonconstant pointer to nonconstant data.
8.8 Q3: A pointer can not be assigned to:
Answer: A pointer of a type other than its own type and void without using the cast operator.
8.2 Q2: Pointers may be assigned to which of the following?
Answer: Both (b) and (c).
8.4 Q1: Which of the following is not a valid way to pass arguments to a function in C++?
Answer: By value with pointer arguments.
8.10 Q2: A string array is commonly used for:
Answer: Command-line arguments.
8.13.2 Q3: strtok does not:
Answer: Completely tokenize the string the first time it is called.
8.3 Q2: All of the following could cause a fatal execution-time error except:
Answer: Dereferencing a variable that is not a pointer.
8.12 Q2: ( *max )( num1, num2, num3 );:
Answer: Is a call to the function pointed to by max.
8.10 Q1: A string array:
Answer: Is actually an array of pointers.
8.9 Q2: Consider the following function: void reverse( char * string1, const char * string2 ) { int stringsize = sizeof( string1 )/sizeof( char ); *( string1 + stringsize -1 ) = '\0'; string1 = string1 + stringsize - 2; for ( ; *string2 != '\0'; string1--, string2++ ) *string1 = *string2; } What method does the function use to refer to array elements?
Answer: Pointer/offset notation.
8.2 Q1: Pointers cannot be used to:
Answer: Reference values directly.
8.7 Q1: sizeof:
Answer: Returns the total number of bytes in a variable.
8.13.1 Q1: Which of the following is not true?
Answer: String literals are written inside of single quotes.
8.13.2 Q2: Assuming that string1 = "hello" and string2 = "hello world", which of the following returns 0?
Answer: Strncmp( string1, string2, 5 );.
8.11 Q1: An algorithm that could execute for an unknown amount of time because it depends on random numbers may:
Answer: Suffer from indefinite postponement.
8.6 Q1: After the ith iteration of the selection sort:
Answer: The smallest i items of the array will be sorted into increasing order in the first i elements of the array.
8.12 Q1: Which of the following is not true of pointers to functions?
Answer: They can not be assigned to other function pointers.
8.8 Q4: Comparing pointers and performing pointer arithmetic on them is meaningless unless:
Answer: They point to elements of the same array.
8.2 Q3: What does the following declaration declare?int *countPtr, count;
Answer: Two pointers to ints.
8.13.1 Q2: cin.getline( superstring, 30 ); is equivalent to which of the following?
Answer: cin.getline( superstring, 30, '\n' );.
8.4 Q2: When a compiler encounters a function parameter for a single-subscripted array of the form int a[], it converts the parameter to:
Answer: int * a.
8.7 Q2: Which of the following gives the number of elements in the int array r[ ]?
Answer: sizeof r / sizeof ( int ).
8.13.2 Q1: Which of the following correctly copies the contents of string2 into string1? Assume that string2 is equal to "goodbye" and string1 is equal to "good morning"?
Answer: strcpy( string1, string2 );.
