CSC 307 DATA STRUCTURES AND ALGORITHM ANALYSIS IN C++ SPRING 2011

Transcription

1 CSC 307 DATA STRUCTURES AND ALGORITHM ANALYSIS IN C++ SPRING 2011 Date: 01/18/2011 (Due date: 01/20/2011) Name and ID (print): CHAPTER 6 USER-DEFINED FUNCTIONS I 1. The C++ function pow has parameters. A: zero B: one C: two D: three 2. To avoid compilation errors, function are typically placed before any function definition, including the definition of main. A: headers B: prototypes C: declarations D: bodies 3. A call to a value-returning function with an empty formal parameter list has the form. A: functionname B: void functionname C: functionname() D: functionname(void) 4. The code required to accomplish the task of a function is called the function. A: definition B: body C: header D: prototype 5. Which of the following functions has one parameter of type int? A: exp B: cos

2 C: fabs D: abs 6. To remove the first or last digit of an integer, you can use the operator. A: digit B: rem C: mod D: div 7. A(n) declaration is one in which a variable is declared inside a block to be used only within that block. A: actual B: limited C: function D: local 8. The statements of a function enclosed within curly braces form the of a function. A: body B: definition C: prototype D: header 9. Which of the following statements will output the character 'A'? A: cout << (toupper('a'); B: cout << toupper(a); C: cout << static_cast<char> (toupper('a')); D: cout << static_cast <string>(toupper('a')); 10. In the C++ function sqrt(x), x is called a of the function sqrt. A: value B: function C: return type D: parameter 11. The general syntax of a function prototype of a value-returning function is. A: functiontype functionname (parameter list); B: functiontype functionname (parameter list)

3 C: functiontype functionname (); D: functionname (parameter list); 12. Which of the following is true of the relationship between actual and formal parameters? A: The number of actual and formal parameters may differ. B: The data types of corresponding actual and formal parameters must match. C: Corresponding actual and formal parameters do not have to be listed in the same order. D: All of the above. 13. The function definition consists of the function. A: header and body B: header and prototype C: header D: prototype and body 14. The ceil function is defined in the header file. A: iostream B: cmath C: iomanip D: cstdlib 15. In what order does a compiler translate a program? A: It translates the program sequentially from beginning to end. B: It compiles all functions except main, and then compiles the main function. C: It compiles the main function first, then compiles the remaining functions in order. D: It compiles functions in the order that they are called in the main function. 16. Given the function header double larger(double x, double y), which of the following would be a valid function call to larger? A: larger(5, 6) B: larger() C: larger(double 5, double 6) D: double larger(double 5, double 6) 17. What is the syntax of a formal parameter list (brackets indicate optional elements)? A: datatype (identifier) [, datatype (identifier)...] B: datatype identifier [; datatype identifier...]

4 C: identifier (datatype) [, identifier (datatype)...] D: (datatype identifier) [, (datatype identifier)...] 18. functions are functions that have a return type. A: Value-returning B: Void C: Predefined D: Concrete 19. The C++ function calculates the largest whole number that is less than or equal to x. A: floor(x) B: ceil(x) C: abs(x) D: eqwhole(x) 20. Which of the following elements do NOT have to be included in a function prototype? A: The variable names of the parameters. B: The data types of the parameters. C: The return type of the function. D: The parentheses enclosing the parameter list (if the parameter list is empty). CHAPTER 7 USER-DEFINED FUNCTIONS II 1. The of an identifier refers to where in the program an identifier is accessible. A: function B: scope C: parameters D: reference 2. With the reserved word extern, a function can access a global variable. A: even when the global variable is declared after the function definition. B: only if the function has no local variables C: even if the function has an identifier with the same name D: only if it is declared directly before the function heading 3. If a function's name is overloaded, the determines which function to execute. A: actual parameter list

5 B: main function C: formal parameter list D: return type 4. The actual parameter list of a void function has the following syntax:. A: void variable [, variable...] B: datatype[&] variable [, datatype[&] variable...] C: (void) D: expression or variable [, expression or variable...] 5. When using a reference parameter, a constant value or an expression can only be passed to parameter. A: a nonconstant reference parameter B: a nonconstant value parameter C: a constant reference D: none of the above 6. A identifier is declared within a function or block. A: local B: global C: block D: default 7. To declare an external variable inside a function, you use the syntax. A: extern::identifier; B: extern identifier (datatype); C: extern datatype identifier; D: external datatype identifier; 8. C++ relaxes the rule of one-to-one correspondence between formal and actual parameters with the use of parameters. A: global B: reference C: actual D: default 9. The formal parameter list of a void function has the following syntax:.

6 A: void variable [, variable...] B: datatype[&] variable [, datatype[&] variable...] C: (void) D: expression or variable [, expression or variable...] 10. variables in a function have memory allocated in the function data area. A: External B: Reference C: Global D: Local 11. A identifier is declared outside any function definition. A: local B: global C: block D: default 12. Global variables should be used primarily for. A: value parameters B: named constants C: reference parameters D: all of the above 13. Default values for default parameters can be. A: constants B: global variables C: function calls D: all of the above 14. C++ functions that do not have a data type are called functions. A: void B: parameterized C: reference D: value-returning 15. A parameter receives a copy of the content of the corresponding actual parameter.

7 A: value B: static C: reference D: global 16. When using a reference parameter, the content of the formal parameter is. A: the address of the calling function B: the name of the actual parameter C: the address of the actual parameter D: the value of the actual parameter 17. Which of the following can be true for a global identifier to be accessible by a function or block? A: A local variable of the function has the same name as the global identifier. B: The function name is the same as the name of the global identifier. C: A parameter of the function has the same name as the global identifier. D: The global identifier is declared before the function definition. 18. A variable for which memory is allocated at block entry and deallocated at block exit is called a(n) variable. A: function B: global C: automatic D: static 19. Program execution always begins with the first statement in the. A: first void function B: function main C: program D: first function 20. A parameter receives the location of the corresponding actual parameter. A: value B: static C: reference D: global

8 CHAPTER 8 USER-DEFINED SIMPLE DATA TYPES, NAMESPACES, AND THE STRING TYPE 1. Many compiler vendors begin their global identifier names with a(n). A: pound sign B: underscore C: ampersand D: asterisk 2. The length function. A: specifies the maximum possible length of a string B: returns the number of characters currently in the string C: returns the maximum number of characters the string can hold D: returns the length of the longest word in the string 3. Which of the following is a valid enumeration type definition? A: enum grades {'A', 'B', 'C', 'D', 'E'}; B: enum colors {BROWN, BLUE, RED, GREEN}; C: enum rank {1ST, 2ND, 3RD, 4TH}; D: enum array {[0], [1], [2], [3]}; 4. The mechanism helps solve the problem of overlapping global identifier names. A: include B: enum C: namespace D: typedef 5. The syntax of the length function is. A: strvar.length B: strvar (length) C: strvar.length() D: strvar.length (numchars) 6. The syntax for declaring variables of an enumeration type is. A: enum identifier, identifier... ; B: datatype identifier, identifier... ; C: enum datatype, datatype... ;

9 D: datatype enum; 7. Which of the following can be a namespace member? A: named constant B: variable declaration C: another namespace D: All of the above 8. The length function returns a value of type. A: signed long B: string::int_type C: string::size_type D: char 9. Which of the following operators can be used with enumeration types? A: = B: + C: * D: All of the above 10. The scope of a namespace is. A: global to the C++ library B: undefined C: local to the namespace D: global to all namespaces in the same directory 11. The find function returns a value of type. A: signed long B: string::int_type C: string::size_type D: char 12. Which of the following operators can be used with enumeration types? A: / B: ++ C: <=

10 D: All of the above 13. The general syntax for accessing a namespace member is. A: identifier::namespace::name B: namespace_name.identifier C: namespace_name (identifier) D: namespace_name::identifier 14. The function returns the same value as the length function. A: min B: substr C: max D: size 15. The enumeration type is a(n) type. A: Boolean B: character C: string D: integral 16. You can simplify the accessing of namespace members with the statement. A: using B: include C: typedef D: define 17. The function searches a string to find the first occurrence of a particular substring. A: swap B: length C: substr D: find 18. You can use the operator to increment or decrement the value of an enumeration type. A: scope resolution B: stream C: cast

11 D: assignment 19. A using statement is typically placed. A: in the function in which the namespace members are used B: with the variable declarations in main C: directly before the namespace declaration D: directly after the namespace declaration 20. Which of the following functions has two forms? A: size B: find C: substr D: swap CHAPTER 9 ARRAYS AND STRINGS 1. The of an array is the address of the first array component. A: formal parameter B: subscript C: base address D: index location 2. C++ does not allow. A: arrays to be copied B: component-wise operations on an array C: aggregate operations on an array D: any of the above 3. A array is a collection of a fixed number of components arranged in rows and columns, wherein all components are of the same data type. A: parallel B: two-dimensional C: tabular D: composite 4. You typically step through the elements of an array using a(n). A: switch statement

12 B: named constant C: additional array D: loop 5. C-strings are. A: enclosed in single quotation marks B: enclosed in double quotation marks C: not enclosed in quotes D: are stored in computer memory without a null termination character 6. The of an array specifies the position of a component in an array. A: index value B: data type C: element value D: dimension 7. The last character in a C-string is always. A: the last element of the input string B: the null character C: the integer zero D: the newline character 8. An array is a data type. A: structured B: simple C: constant D: primitive 9. Given an array mylist, what is the result of the statement cout << mylist? A: The compiler generates an error. B: The base address of mylist is output. C: The value of the first element in mylist is output. D: All of the values of mylist are output. 10. A(n) operation on an array is any operation that manipulates the array as an entire unit. A: aggregate

13 B: component C: legal D: composite 11. In the declaration of a two-dimensional array, the value inside the second set of brackets indicates. A: the base address of the array B: the size of the array C: the number of columns in the array D: the number of rows in the array 12. Which of the following will input data into a ten element array named sales? A: for (index = 0; index < 10; index++) cin > > sales[index]; B: cin > > sales; C: for (index = 0; index <= 10; index++) cin > > sales[index]; D: cin > > index; 13. Which of the following aggregate operations can be performed on C-strings? A: comparison B: assignment C: input/output D: none of the above 14. The value inside the brackets of an array declaration specifies the. A: maximum value that can be held by any item in the array B: value of the first element of the array C: number of components in the array D: the number of bytes set aside in memory for the array 15. A C-string can contain any of the following characters anywhere within the string except the character. A: blank B: null C: backslash D: concatenation operator 16. Which of the following is true of an array?

14 A: Each element can be of a different data type. B: The number of elements can be modified at any time. C: It is not part of the C++ language. D: It can have one or more dimensions. 17. When you pass an array as a parameter, the of the actual array is/are passed to the formal parameter. A: exact size B: number of elements C: first element D: base address 18. In C++, arrays. A: cannot be passed to a function B: can be passed by reference or by value C: are passed by value only D: are passed by reference only 19. A(n) is typically used to process an entire two-dimensional array. A: additional array B: a nested switch structure C: single loop D: nested for loop 20. The index of an array is in bounds if. A: index > = 0 and index < = ARRAY_SIZE B: index > = 0 and index < = ARRAY_SIZE + 1 C: index = 0 or index < = ARRAY_SIZE D: index > = 0 and index < = ARRAY_SIZE - 1 CHAPTER 10 APPLICATIONS OF ARRAYS AND THE VECTOR TYPE 1. For a list of length n, on average, the insertion sort makes about item assignments. A: n (n - 1) / 2 B: + 3n - 4 / 4 C: n - 1 / 2

15 D: n (n - 1) / 4 2. A binary search can be performed. A: on sorted or unsorted lists B: only on sorted lists C: only on unsorted lists D: on sorted or partially sorted lists 3. The binary search function presented in this chapter returns to indicate an unsuccessful search. A: -1 B: 0 C: 1 D: false 4. The statement creates a vector object named veclist without any elements. A: vector<elemtype> veclist; B: vectorveclist; C: veclist; D: vector veclist(elemtype); 5. The function size(). A: initializes a vector object to hold zero elements B: returns the maximum number of elements that can be inserted into a vector object C: initializes a vector object to hold a specified number of elements D: returns the number of elements currently held in a vector object 6. The array you use to store a list should be declared with the size of the list. A: minimum B: maximum C: exact D: initial 7. A(n) search sequentially searches an array starting with the first component, and continues until the item is found or when no more data is left in the list. A: linear B: binary

16 C: random D: elemental 8. On average, the number of key comparisons made by a sequential search is equal to. A: half the size of the list B: the size of the list C: the number of unique elements in the list D: the size of the array containing the list 9. The temp variable used in the "swap" code for the bubble sort in this chapter is used to hold the. A: index value of the element to be swapped B: element with the larger value in the swap C: element with the smaller value in the swap D: return value of the function 10. For a list of length n, on average, the selection sort makes key comparisons. A: n (n - 1) / 2 B: n (n -1) / 4 C: n - 1 / 2 D: n / Which of the following sorts, on average, makes the least number of key comparisons? A: bubble B: selection C: insertion D: binary 12. A binary search uses a technique to search the list. A: linear B: sequential C: divide and conquer D: search and remove 13. The binary search function presented in this chapter returns to indicate a successful search. A: the integer 0 B: the value of the element

17 C: the location of the item D: a true value 14. The statement creates a vector object, veclist, with size elements and initialized with default values. A: vector veclist(size); B: vector veclist(size, value); C: vector veclist(value); D: vectorvec<elemtype> List(size); 15. The function can be used to increase the size of a vector object. A: resize() B: size() C: push() D: max_size() 16. To search a list, you need. A: the data structure containing the list B: the length of the list C: the item for which you are searching D: all of the above 17. A sequential search function. A: requires a Boolean variable to exit the search loop B: must return a Boolean value indicating success or failure C: may be implemented with or without a Boolean variable to exit the search loop D: must include the return value inside the search loop 18. The sequential search algorithm. A: assumes that the list is sorted B: does not assume the list is sorted C: always sorts the list before searching D: cannot be performed on a sorted list 19. The code to perform a "swap" for the sorts presented in this chapter requires assignment statements. A: one

18 B: two C: three D: four 20. For a list of length n, on average, the selection sort makes item assignments. A: n (n - 1) / 2 B: n (n - 1) / 4 C: n - 1 / 2 D: 3 (n - 1)