c++ mcq questions and answers With chapter wise All in One
This PDF provides solved quiz questions and answers on chapters such as introduction to C++, C++ libraries, classes and data abstraction, Data Types and Variables, operators and expressions, computers and C++ programming, conditional statements and integer types, control structures in C++, functions in C++,Arrays and Strings, introduction to C++ programming, introduction to object-oriented languages, introduction to programming languages, iteration and floating types, object-oriented language characteristics, pointers and references, pointers and strings, stream input-output, strings in C++, templates and iterators tests for college and university revision guide.
Introduction to C++ MCQ
Test your C++ knowledge with our comprehensive Introduction to C++ MCQ (Multiple Choice Questions) quiz. Explore fundamental concepts and language features as you choose the best answers. Perfect for beginners and enthusiasts looking to assess their understanding of C++ programming. Start your C++ journey now!
1. What does C++ stand for?
a) Computer Code++
b) Common Compiler++
c) Comprehensive C++
d) C Plus Plus
2. C++ is an extension of which programming language?
a) CPP
b) Java
c) Python
d) Fortran
3. Which of the following is NOT a fundamental data type in C++?
a) int
b) string
c) float
d) char
4. What is the correct syntax to declare a variable in C++?
a) var_name = value;
b) value var_name;
c) type var_name;
d) var_name type;
5. Which C++ keyword is used to define a class?
a) class
b) struct
c) define
d) type
6. Which operator is used to access the member functions and variables of a class?
a) ->
b) .
c) ::
d) :
7. In C++, how is a single-line comment denoted?
a) /* comment */
b) <!-- comment -->
c) // comment
d) %% comment
8. Which C++ header file should be included to work with input and output streams?
a) iostream.h
b) stdio.h
c) inputoutput.h
d) iostream
9. Which function is used to print output to the console in C++?
a) cout
b) print
c) output
d) display
10. What is the entry point for a C++ program?
a) main()
b) start()
c) program()
d) entry()
11. Which C++ loop construct is used to execute a block of code repeatedly as long as a condition is true?
a) for loop
b) while loop
c) do-while loop
d) iterate loop
12. What does the 'cin' object in C++ stand for?
a) character input
b) common input
c) console input
d) cinematics
13. Which operator is used for memory allocation in C++?
a) new
b) alloc
c) malloc
d) memalloc
14. Which C++ function is used to dynamically deallocate memory?
a) delete
b) free
c) remove
d) destroy
15. What is function overloading in C++?
a) Using more functions than needed
b) Using a single function for multiple purposes
c) Naming functions similarly in different source files
d) Calling functions within other functions
16. What is the purpose of the 'const' keyword in C++?
a) It indicates a function that performs constant calculations.
b) It specifies that a variable's value cannot be changed after initialization.
c) It marks the beginning of a constant data structure.
d) It denotes a reserved keyword for future use.
17. How is inheritance represented in C++?
a) extends
b) inherits
c) :
d) is_a
18. What does polymorphism mean in the context of C++?
a) Creating multiple objects of the same class.
b) Changing the structure of a class at runtime.
c) Using different data types in a single variable.
d) The ability of objects of different classes to be treated as objects of a common base class.
19. Which C++ access specifier allows class members to be accessible from outside the class?
a) private
b) protected
c) internal
d) public
20. Which header file is required to work with file handling in C++?
a) file.h
b) inputoutputstream.h
c) fstream.h
d) filehandling.h
Answers to the MCQs:
1. d) C Plus Plus
2. a) C
3. b) string
4. c) type var_name;
5. a) class
6. b) .
7. c) // comment
8. d) iostream
9. a) cout
10. a) main()
11. b) while loop
12. c) console input
13. a) new
14. a) delete
15. b) Using a single function for multiple purposes
16. b) It specifies that a variable's value cannot be changed after initialization.
17. c) :
18. d) The ability of objects of different classes to be treated as objects of a common base class.
19. d) public
20. c) fstream.h
Data Types and Variables C++ MCQ
Test your understanding of Data Types and Variables in C++ with our comprehensive MCQ quiz. Assess your knowledge of handling diverse data and utilizing variables in C++ programming. Perfect your skills and enhance your coding prowess today.
1. What is a data type in programming?
a) A keyword used for defining loops
b) A type of code structure
c) A way to format text
d) A classification of data based on the type of value it holds
2. Which data type is used to store whole numbers in most programming languages?
a) integer
b) decimal
c) character
d) boolean
3. In C++, what is the keyword used to declare a variable?
a) declare
b) var
c) define
d) int
4. Which of the following is NOT a valid variable name?
a) myVariable
b) _variable
c) 123variable
d) Variable123
5. What is the default value of an uninitialized integer variable in C++?
a) 0
b) 1
c) -1
d) Garbage value
6. Which data type is used to store true/false values?
a) int
b) boolean
c) char
d) float
7. Which data type is used to store single characters in programming?
a) string
b) char
c) character
d) txt
8. Which data type is used to store decimal numbers with single precision?
a) double
b) float
c) decimal
d) real
9. What is the size of the 'char' data type in bytes in C++?
a) 1
b) 2
c) 4
d) It varies
10. Which of the following is a valid way to declare and initialize a constant variable in C++?
a) const int x = 5;
b) final x = 5;
c) let x = 5;
d) static const x = 5;
11. In C++, which escape sequence represents a newline character?
a) \n
b) \r
c) \t
d) \a
12. Which data type should be used to store currency values to ensure precision?
a) float
b) double
c) decimal
d) money
13. What does the term "casting" refer to in programming?
a) Converting data from one type to another
b) Adding two variables together
c) Declaring a new variable
d) Copying data from one location to another
14. Which data type is used to store a memory address in C++?
a) pointer
b) reference
c) address
d) location
15. What is the maximum value that can be stored in an 'int' data type in C++ on most systems?
a) 32767
b) 65535
c) 2147483647
d) It varies based on the system
16. Which data type is used to store a true/false value in Python?
a) bool
b) boolean
c) logical
d) bit
17. In C++, what is the size of the 'double' data type in bytes?
a) 2
b) 4
c) 8
d) 16
18. Which of the following is NOT a primitive data type in most programming languages?
a) string
b) int
c) float
d) char
19. What is the purpose of declaring variables with meaningful names?
a) It reduces memory usage.
b) It makes the code look cleaner.
c) It helps in self-documentation and code readability.
d) It improves program execution speed.
20. In C++, which header file is necessary to work with the 'bool' data type?
a) bool.h
b) boolean.h
c) stdbool.h
d) booltype.h
Answers to the MCQs related to data types and variables:
1. d) A classification of data based on the type of value it holds
2. a) integer
3. d) int
4. c) 123variable
5. d) Garbage value
6. b) boolean
7. b) char
8. b) float
9. a) 1
10. a) const int x = 5;
11. a) \n
12. b) double
13. a) Converting data from one type to another
14. a) pointer
15. c) 2147483647
16. a) bool
17. c) 8
18. a) string
19. c) It helps in self-documentation and code readability.
20. c) stdbool.h
Operators and Expressions C++ MCQ
Enhance your C++ expertise with our Operators and Expressions MCQ quiz. Test your grasp of essential programming concepts related to operators and expressions. Strengthen your problem-solving skills and advance your C++ proficiency now.
1. What is the primary purpose of operators in programming?
a) To format text
b) To define functions
c) To perform operations on data
d) To create loops
2. Which of the following is NOT a category of operators?
a) Arithmetic operators
b) Logical operators
c) Programming operators
d) Relational operators
3. In the expression `x = y + z;`, what does the operator `+` represent?
a) Assignment
b) Subtraction
c) Addition
d) Equality
4. Which operator is used for exponentiation in many programming languages?
a) ^
b) **
c) ^
d) ^^
5. What is the result of the expression `10 % 3`?
a) 1
b) 2
c) 3
d) 0
6. Which of the following is a comparison operator?
a) &
b) %
c) ==
d) |
7. What is the correct syntax for the ternary conditional operator in C++?
a) x ? y : z
b) x : y ? z
c) x : y : z
d) y ? x : z
8. Which operator is used to access the memory address of a variable in C++?
a) *
b) &
c) %
d) $
9. What is the result of the expression `true && false`?
a) true
b) false
c) undefined
d) error
10. Which operator is used for combining two or more conditions in programming?
a) ||
b) &&
c) !
d) &|
11. What does the operator `++` do when placed after a variable (post-increment)?
a) Decreases the variable by 1
b) Multiplies the variable by 2
c) Increases the variable by 1 after its value is used
d) Increases the variable by 1 before its value is used
12. What is the result of the expression `5 / 2` in most programming languages?
a) 2.5
b) 2
c) 2.0
d) 2.25
13. Which operator is used to access the member of a structure through a pointer?
a) ::
b) .
c) ->
d) ::>
14. What is the purpose of the operator `sizeof` in C++?
a) It calculates the sum of two numbers.
b) It finds the size of a file.
c) It calculates the size in bytes of a data type or variable.
d) It calculates the size of an array.
15. Which operator is used for bitwise NOT?
a) !
b) ~
c) ^
d) &~
16. What does the operator `+=` do in programming?
a) Adds two variables
b) Subtracts two variables
c) Multiplies two variables
d) Updates a variable by adding a value to it
17. What is the result of the expression `true || false`?
a) true
b) false
c) undefined
d) error
18. In the expression `a = b * c + d`, which operation is performed first?
a) Addition
b) Multiplication
c) Assignment
d) It depends on operator precedence
19. What is the purpose of the operator `?:` in C++?
a) It represents a ternary conditional operator.
b) It defines a new variable.
c) It performs division.
d) It converts data types.
20. What is the result of the expression `5 > 3 && 2 < 4`?
a) true
b) false
c) 1
d) error
Answers to the MCQs related to operators and expressions:
1. c) To perform operations on data
2. c) Programming operators
3. c) Addition
4. b) **
5. a) 1
6. c) ==
7. a) x ? y : z
8. b) &
9. b) false
10. b) &&
11. c) Increases the variable by 1 after its value is used
12. b) 2
13. c) ->
14. c) It calculates the size in bytes of a data type or variable.
15. b) ~
16. d) Updates a variable by adding a value to it
17. a) true
18. b) Multiplication
19. a) It represents a ternary conditional operator.
20. a) true
Control Statements MCQ C++
Explore the realm of control in C++ programming through our MCQ quiz on Control Statements. Test your knowledge of conditional statements and loops, crucial for effective code manipulation. Elevate your C++ skills by mastering the control flow. Start the quiz now!
1. Which control statement is used to execute a block of code repeatedly as long as a certain condition is true?
a) if statement
b) for loop
c) switch statement
d) while loop
2. The `break` statement is used to:
a) Terminate the program
b) Skip the rest of the loop and move to the next iteration
c) Exit from a function
d) Stop the execution of the current loop or switch case
3. The `switch` statement is used to:
a) Compare two values
b) Execute a block of code if a condition is true
c) Choose between multiple cases based on a value
d) Define a sequence of steps
4. Which statement is used to exit a loop iteration prematurely and continue with the next iteration?
a) skip
b) next
c) break
d) pass
5. In the context of loops, what is the purpose of an "iteration"?
a) It is a type of data structure
b) It represents a variable used in the loop
c) It refers to the code executed within a loop
d) It is a single execution of the loop body
6. The `else` statement is used in conjunction with which control statement?
a) if statement
b) for loop
c) while loop
d) switch statement
7. What is the main difference between a `while` loop and a `do-while` loop?
a) The `do-while` loop always executes at least once.
b) The `while` loop can only iterate a fixed number of times.
c) The `do-while` loop cannot contain nested statements.
d) The `while` loop requires an explicit condition.
8. Which of the following control structures is used to make decisions based on multiple conditions?
a) if-else statement
b) for loop
c) while loop
d) switch statement
9. What is the purpose of the `continue` statement in a loop?
a) It exits the loop completely.
b) It skips the remaining code within the loop body.
c) It starts the loop from the beginning of the iteration.
d) It stops the loop and returns a value.
10. Which control statement is used to define a block of code that should be executed if a certain condition is true?
a) then
b) else
c) elif
d) if
11. The syntax of the `for` loop includes:
a) initialization, condition, and increment/decrement
b) initialization and condition only
c) condition and increment/decrement only
d) condition only
12. In a `switch` statement, what happens if no `case` matches the provided value?
a) The program terminates.
b) The default case is executed.
c) An error occurs.
d) The program continues to the next loop iteration.
13. Which statement is used to define a single-line comment in most programming languages?
a) /* comment */
b) <!-- comment -->
c) // comment
d) %% comment
14. The `goto` statement is used for:
a) Defining functions
b) Creating loops
c) Transferring control to a labeled statement
d) Writing comments
15. What is the purpose of the `default` case in a `switch` statement?
a) It specifies the case with the highest priority.
b) It executes if no other case matches the value.
c) It signifies the end of the switch statement.
d) It defines the starting point of the switch statement.
16. Which statement is used to create a loop that continues as long as a certain condition is true?
a) for loop
b) while loop
c) repeat loop
d) switch statement
17. The `if-else` statement provides branches for:
a) A single condition
b) Two conditions
c) Multiple conditions
d) Loops
18. The purpose of the `exit()` function in C++ is to:
a) Terminate the entire program
b) Exit from a loop
c) Stop the execution of a single function
d) Close an open file
19. In a `for` loop, where is the initialization section usually placed?
a) At the beginning of the loop body
b) After the loop body
c) After the loop condition
d) Before the loop condition
20. Which control statement is used to handle exceptions and errors in programming?
a) try-catch statement
b) if-else statement
c) for loop
d) switch statement
Answers to the MCQs related to control statements:
1. d) while loop
2. d) Stop the execution of the current loop or switch case
3. c) Choose between multiple cases based on a value
4. c) break
5. d) It is a single execution of the loop body
6. a) if statement
7. a) The `do-while` loop always executes at least once.
8. a) if-else statement
9. c) It starts the loop from the beginning of the iteration.
10. d) if
11. a) initialization, condition, and increment/decrement
12. b) The default case is executed.
13. c) // comment
14. c) Transferring control to a labeled statement
15. b) It executes if no other case matches the value.
16. b) while loop
17. a) A single condition
18. a) Terminate the entire program
19. d) Before the loop condition
20. a) try-catch statement
Functions C++ MCQ
1. What is a function in C++?
a) A keyword used for loop iterations
b) A block of code that repeats indefinitely
c) A container for storing variables
d) A block of code that performs a specific task
2. Which part of a function's declaration provides its name and return type?
a) Function body
b) Function prototype
c) Function header
d) Function call
3. What is the purpose of the 'return' statement in a C++ function?
a) To define the function's parameters
b) To terminate the function
c) To output a value from the function
d) To skip the function's execution
4. In C++, what is the keyword used to define a function?
a) func
b) def
c) function
d) void
5. The process of passing arguments to a function is called:
a) Function calling
b) Function defining
c) Function parameterization
d) Function prototyping
6. Which type of function does not return any value in C++?
a) Null function
b) Empty function
c) Void function
d) None of the above
7. What is function overloading in C++?
a) Redefining functions multiple times
b) Using a single function for all purposes
c) Creating multiple functions with the same name but different parameters
d) Removing functions from the code
8. What is the difference between a function declaration and a function definition in C++?
a) There is no difference, they are synonyms.
b) A declaration provides the function's implementation, while a definition just declares its signature.
c) A definition provides the function's implementation, while a declaration just declares its signature.
d) A declaration and a definition are interchangeable.
9. Which C++ keyword is used to pass a variable by reference to a function?
a) value
b) ref
c) pass
d) &
10. What is the main advantage of using functions in C++ programming?
a) They improve the appearance of the code.
b) They reduce the need for loops.
c) They allow for code reuse and modularity.
d) They make the code execute faster.
11. What does the 'main' function represent in a C++ program?
a) A placeholder function for future use
b) The entry point of the program, where execution begins
c) A function for mathematical calculations
d) A function that is automatically generated by the compiler
12. In C++, what is function recursion?
a) A function that returns the result of another function
b) A function that calls itself during its execution
c) A function that takes multiple arguments
d) A function that has a loop inside its body
13. Which C++ keyword is used to terminate a loop iteration and move to the next iteration?
a) next
b) exit
c) continue
d) break
14. In C++, what is the scope of a local variable declared inside a function?
a) It can be accessed from any part of the program.
b) It can only be accessed within the function it is declared in.
c) It can be accessed from any function within the same file.
d) It can be accessed from any function within the same namespace.
15. Which C++ keyword is used to specify the data type of a function's return value?
a) type
b) return
c) result
d) auto
16. What is a parameterized function in C++?
a) A function with a fixed number of parameters
b) A function that takes a variable number of arguments
c) A function that has parameters with no default values
d) A function that uses parameters to define its name
17. In C++, what does the 'inline' keyword suggest for a function?
a) The function is not meant to be called.
b) The function's implementation is not provided.
c) The function should be replaced by its code during compilation.
d) The function can only be called once.
18. Which C++ keyword is used to specify default values for function parameters?
a) default
b) value
c) initial
d) = (equal sign)
19. What is the purpose of a function prototype in C++?
a) It provides the function's implementation.
b) It defines the return value of the function.
c) It declares the function's name, return type, and parameters.
d) It is required for calling built-in functions.
20. What is the significance of the 'namespace' keyword in C++ functions?
a) It declares a new type of function.
b) It specifies the access control for a function.
c) It defines a unique name for a set of functions.
d) It indicates a function is used within a specific scope.
Answers to the MCQs related to functions in C++ programming:
1. d) A block of code that performs a specific task
2. b) To output a value from the function
3. a) Function header
4. d) void
5. a) Function calling
6. c) Void function
7. c) Creating multiple functions with the same name but different parameters
8. c) A definition provides the function's implementation, while a declaration just declares its signature.
9. d) &
10. c) They allow for code reuse and modularity.
11. b) The entry point of the program, where execution begins
12. b) A function that calls itself during its execution
13. c) continue
14. b) It can only be accessed within the function it is declared in.
15. a) type
16. a) A function with a fixed number of parameters
17. c) The function should be replaced by its code during compilation.
18. d) = (equal sign)
19. c) It declares the function's name, return type, and parameters.
20. c) It defines a unique name for a set of functions.
Arrays and Strings C++ MCQ
Welcome to this multiple choice quiz on arrays and strings in C++. Test your understanding of fundamental concepts related to arrays and strings in C++ programming with the following questions. Choose the best answer among the options provided.
1. In C++, what is an array?
a) A string of characters
b) A collection of functions
c) A sequence of integers
d) A collection of elements of the same data type
2. How do you access the elements of an array in C++?
a) Using a pointer to the array
b) Using the dot operator
c) Using the index of the element
d) Using the size of the array
3. What is the maximum number of elements an array in C++ can hold?
a) 100
b) 256
c) It depends on the available memory
d) 64
4. Which data type is commonly used to represent characters in C++?
a) char
b) character
c) string
d) txt
5. What is the null character in C++?
a) A character with the ASCII value 0
b) A special character used to represent spaces
c) A character with the ASCII value 255
d) A character that is not defined in C++
6. How do you declare an array with 10 elements of type int in C++?
a) int arr[10];
b) array int[10];
c) int[10] arr;
d) arr[10] int;
7. What is the index of the first element in an array in C++?
a) 0
b) 1
c) -1
d) It depends on the array size
8. How can you find the number of elements in an array in C++?
a) Using the 'length' property
b) Using the 'size' function
c) Using the 'count' keyword
d) It cannot be determined
9. What is the purpose of the 'strlen' function in C++?
a) It calculates the length of a string.
b) It converts a string to lowercase.
c) It reverses the characters in a string.
d) It compares two strings.
10. What is the difference between an array and a string in C++?
a) Arrays can hold multiple data types, while strings can only hold characters.
b) Arrays are fixed in size, while strings can dynamically resize.
c) Strings are one-dimensional arrays of characters.
d) Arrays have a fixed length, while strings have a variable length.
11. How do you initialize a character array with the string "Hello" in C++?
a) char str[5] = "Hello";
b) char str[] = "Hello";
c) char str[6] = "Hello";
d) char str[5] = {'H', 'e', 'l', 'l', 'o'};
12. What is the purpose of the 'strcpy' function in C++?
a) It calculates the length of a string.
b) It compares two strings.
c) It concatenates two strings.
d) It copies one string to another.
13. How can you input a string with spaces in C++ using 'cin'?
a) cin >> str;
b) cin.get(str);
c) cin.getline(str);
d) getline(cin, str);
14. What is the purpose of the 'toupper' function in C++?
a) It converts a string to uppercase.
b) It calculates the length of a string.
c) It converts a string to lowercase.
d) It reverses the characters in a string.
15. What is the difference between a character array and a C++ string?
a) There is no difference; they are synonyms.
b) Character arrays are fixed in size, while strings can dynamically resize.
c) Strings are one-dimensional arrays of characters.
d) Character arrays can hold multiple data types.
16. How can you concatenate two C++ strings?
a) str1 . str2;
b) str1 + str2;
c) concat(str1, str2);
d) str1 & str2;
17. What is the purpose of the 'c_str' function in C++?
a) It converts a C++ string to lowercase.
b) It converts a C++ string to uppercase.
c) It returns a pointer to a C-style string.
d) It calculates the length of a C++ string.
18. Which C++ function is used to compare two strings?
a) strcompare
b) strcmp
c) compare
d) strcoll
19. What is the size of a character in C++?
a) 1 byte
b) 2 bytes
c) 4 bytes
d) It varies based on the system
20. How can you convert a string to an integer in C++?
a) str2int(str);
b) int(str);
c) stoi(str);
d) toInt(str);
Answers to the MCQs related to arrays and strings in C++ programming:
1. d) A collection of elements of the same data type
2. c) Using the index of the element
3. c) It depends on the available memory
4. a) char
5. a) A character with the ASCII value 0
6. a) int arr[10];
7. a) 0
8. b) Using the 'size' function
9. a) It calculates the length of a string.
10. c) Strings are one-dimensional arrays of characters.
11. b) char str[] = "Hello";
12. d) It copies one string to another.
13. d) getline(cin, str);
14. a) It converts a string to uppercase.
15. b) Character arrays are fixed in size, while strings can dynamically resize.
16. b) str1 + str2;
17. c) It returns a pointer to a C-style string.
18. b) strcmp
19. a) 1 byte
20. c) stoi(str);
Structures and Classes C++ MCQ
Welcome to this multiple choice quiz on structures and classes in C++. Test your knowledge of fundamental concepts related to structures and classes in C++ programming with the following questions. Choose the best answer among the options provided.
1. What is a structure in C++?
a) A data type that holds multiple values of different types
b) A built-in function
c) A mathematical equation
d) A type of loop
2. What is the keyword used to define a structure in C++?
a) struct
b) define
c) type
d) var
3. How is a class different from a structure in C++?
a) A class can hold methods, while a structure cannot.
b) A structure is a collection of variables, while a class is a blueprint for objects.
c) A structure is used for arithmetic calculations, while a class is used for file handling.
d) There is no difference; they can be used interchangeably.
4. What are member variables in a C++ class or structure?
a) Functions defined within the class or structure
b) Variables that are not associated with any class or structure
c) Variables declared inside the class or structure
d) Variables declared outside any class or structure
5. How do you access the member variables of a structure in C++?
a) Using the dot operator
b) Using the arrow operator
c) Using the @ symbol
d) Using the hash symbol
6. What is the access specifier 'public' in a C++ class?
a) It indicates that the class is only accessible by the main function.
b) It restricts access to only the class members.
c) It allows unrestricted access to the class members.
d) It indicates that the class is private and cannot be accessed.
7. How can you define a constructor for a class in C++?
a) Using the 'create' keyword
b) Using the 'new' keyword
c) By using a method with the same name as the class
d) By using the class name followed by parentheses
8. What is encapsulation in C++?
a) The process of defining a class
b) The process of bundling data and functions that operate on the data
c) The process of converting data to binary format
d) The process of accessing external data
9. What is the purpose of the 'private' access specifier in a C++ class?
a) It restricts access to the class members only.
b) It allows unrestricted access to the class members.
c) It indicates that the class is private and cannot be accessed.
d) It indicates that the class can be accessed from anywhere.
10. How do you declare an object of a class in C++?
a) objectName = new ClassName;
b) ClassName objectName;
c) objectName = ClassName();
d) new objectName = ClassName;
11. What is a default constructor in C++?
a) A constructor with no parameters
b) A constructor that creates default objects
c) A constructor with default values for all parameters
d) A constructor that is automatically generated by the compiler
12. What is the purpose of the 'this' keyword in C++?
a) It refers to the previous object created.
b) It refers to the current instance of the class.
c) It refers to the superclass of the current class.
d) It refers to the parent class of the current class.
13. What is a destructor in C++?
a) A function that constructs objects
b) A function that initializes class members
c) A function that is called when an object is destroyed
d) A function that handles exceptions
14. In C++, what is the difference between a class method and a member function?
a) There is no difference; they are synonyms.
b) A class method operates on class members, while a member function is a mathematical equation.
c) A class method is called using the object, while a member function is called using the class name.
d) A class method cannot have parameters, while a member function can.
15. How do you declare a pointer to an object in C++?
a) ClassName *objectPtr = new ClassName;
b) ClassName objectPtr;
c) objectPtr = new ClassName;
d) *objectPtr = new ClassName;
16. What is operator overloading in C++?
a) The process of increasing the size of the operator
b) The process of defining new operators
c) The process of using operators for arithmetic operations only
d) The process of redefining an operator's behavior for user-defined data types
17. What is the purpose of the 'friend' keyword in C++?
a) It indicates that a function is a friend of the main function.
b) It restricts access to class members.
c) It allows a non-member function to access private and protected members of a class.
d) It prevents functions from accessing class members.
18. How can you create an object of a C++ class on the heap?
a) ObjectClassName object = new ObjectClassName;
b) ObjectClassName *object
= new ObjectClassName;
c) ObjectClassName *object = ObjectClassName();
d) ObjectClassName object = ObjectClassName();
19. What is inheritance in C++?
a) The process of creating new classes
b) The process of reusing code from an existing class to create a new class
c) The process of creating objects from a class
d) The process of creating functions inside a class
20. How can you prevent a C++ class from being inherited by other classes?
a) By using the 'restrict' keyword
b) By making the class final using the 'final' keyword
c) By removing the inheritance keyword from the class definition
d) By making the class private
Answers to the MCQs related to structures and classes in C++ programming:
1. a) A data type that holds multiple values of different types
2. a) struct
3. b) A structure is a collection of variables, while a class is a blueprint for objects.
4. c) Variables declared inside the class or structure
5. a) Using the dot operator
6. c) It allows unrestricted access to the class members.
7. d) By using the class name followed by parentheses
8. b) The process of bundling data and functions that operate on the data
9. a) It restricts access to the class members only.
10. b) ClassName objectName;
11. a) A constructor with no parameters
12. b) It refers to the current instance of the class.
13. c) A function that is called when an object is destroyed
14. a) There is no difference; they are synonyms.
15. a) ClassName *objectPtr = new ClassName;
16. d) The process of redefining an operator's behavior for user-defined data types
17. c) It allows a non-member function to access private and protected members of a class.
18. b) ObjectClassName *object = new ObjectClassName;
19. b) The process of reusing code from an existing class to create a new class
20. b) By making the class final using the 'final' keyword
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