C++ MCQ : C++ Data Types (MULTIPLE CHOICE QUESTIONS)

In the last set of MCQs, we were introduced to C++ Keywords. There, we have discussed some questions. This set of multiple choice questions focuses on the C++ Data Types.

Firstly, read all the questions and after that select the appropriate option. Moreover, each question contains four options, out of them only one option will be correct. If you fail to select the correct option, don’t worry, you can try again at the end (by refreshing the page). You can use Previous and Next button to switch to a different set of questions.

These questions focuses on different Data Types of C++ like Booleans, Character Types, Integer Types, Floating Point Types, Sizes of data types, Void type, Enumerations. So, first try to learn about data types and then attempt these question to check how much you have learned.

C++ MCQ | DATA TYPES

TEST INSTRUCTIONS: Click on options to see the answer.

In this quiz, there are total 58 questions. So, make sure to switch to the next page by clicking on next button at the end of every 10 questions. After completion of all 58 questions, click on Finish button.

Now, start attempting the quiz.

#1. Pick the odd one out

array type

boolean type

character type

integer type

#2. Which datatype is used to represent the absence of parameters?

short

int

float

void

#3. Which type is best suited to represent the logical values?

all of the mentioned

character

integer

boolean

#4. Identify the user-defined types from the following?

classes

both enumeration and classes

enumeration

int

#5. The value 146.37 can represented using which data type?

bool

double

void

int

#6. Which of the following data types CANNOT store the number 47,255?

String

char

double

int

#7. Which data type holds the integers or real numbers with 8 bytes of memory allocated?

double

int

String

bool

#8. Which data type holds the alphanumerics using character encoding? (size varies)

decimal

int

bool

String

#9. Which holds whole numbers? (4 bytes)

double

int

String

bool

#10. Which of the following belongs to the set of character types?

wchar_t

None of these

char

both wchar_t and char

#11. In C++, what is the sign of character data type by default?

Signed

None of the mentioned

Unsigned

Implementation dependent

#12. What is size of void in bytes?

#13. Which is not an integer data type?

Byte

Single

Integer

Short

#14. ___ refers to the process of changing the data type of the value stored in a variable.

Type int

Type char

Type cast

Type float

#15. ___ data types are structure, union, class and enumeration.

Derived

User defined

Built-in

Integer

#16. What is the size of wchar_t in C++?

2 or 4

Based on the number of bits in the system

#17. Which of the following statements are true?
int f(float)

f is a function of type int

f is a function taking an argument of type float and returning an integer

f is a function taking an argument of type int and returning a floating point number

f is a function of type float

#18. When a language has the capability to produce new data type mean, it can be called as

reprehensible

encapsulated

overloaded

extensible

#19. Pick the odd one out.

enumeration, classes

integer, enum, void

arrays, pointer, classes

integer, character, boolean, floating

#20. Is bool a fundamental data type in C++?

No, it is expanded from macros

No, it is an enum of {false, true}

Yes

No, it is a typedef of unsigned char

#21. Find the odd one out.

std::vector<long>

std::vector<short>

std::vector<int>

std::vector<bool>

#22. What happens when a null pointer is converted into bool?

an error is flagged

bool value evaluates to true

the statement is ignored

bool value evaluates to false

#23. Which of the following statements are false?

bool can be converted into integers implicitly

a bool value can be used in arithmetic expressions

bool can have two values and can be used to express logical expressions

bool cannot be used as the type of the result of the function

#24. For what values of the expression is an if-statement block not executed?

0 and all negative values

0, all negative values, all positive values except 1

0 and -1

#25. Which of the two operators ++ and — work for the bool data type in C++?

++ & —

—

None

#26. Evaluate the following.
(false && true) || false || true

false

None

#27. How many characters are specified in the ASCII scheme?

128

256

#28. Given the variables p, q are of char type and r, s, t are of int type. Select the right statement?
1. t = (r * s) / (r + s);
2. t = (p * q) / (r + s);

1 is false and 2 is true

1 is true but 2 is false

both 1 and 2 are false

both 1 and 2 are true

#29. How do we represent a wide character of the form wchar_t?

L[a]

l’a’

L’a’

#30. Is the size of character literals different in C and C++?

Yes, they are different

Implementation defined

No, they are not different

Can’t say

#31. Suppose in a hypothetical machine, the size of char is 32 bits. What would sizeof(char) return?

Implementation dependent

Machine dependent

#32. The size_t integer type in C++ is?

Signed integer of at least 16 bits

Unsigned integer of at least 64 bits

Signed integer of at least 64 bits

Unsigned integer of at least 16 bits

#33. Which of these expressions will return true if the input integer v is a power of two?

(v & (v – 1)) == 0;

(~v & (v – 1)) == 0;

(v | (v – 1)) == 0;

(v | (v + 1)) == 0;

#34. What is the value of the following 8-bit integer after all statements are executed?
int x = 1;
x = x << 7;
x = x >> 7;

Implementation defined

127

-1

#35. Which of these expressions will make the rightmost set bit zero in an input integer x?

x = x | (x+1)

x = x | (x-1)

x = x & (x-1)

x = x & (x+2)

#36. Which of these expressions will isolate the rightmost set bit?

x = x ^ (-x)

x = x & (-x)

x = x & (~x)

x = x ^ (~x)

#37. 0946, 786427373824, ‘x’ and 0X2f are ___ _ and ___ literals respectively.

octal, decimal, character, hexadecimal

decimal, character, octal, hexadecimal

octal, hexadecimal, character, decimal

hexadecimal, octal, decimal, character

#38. Which of the following is not one of the sizes of the floating point types?

double

short float

long double

float

#39. Which of the following is a valid floating-point literal?

287.e2

F287.333

f287.333

287.3.e2

#40. What is the range of the floating point numbers?

-3.4E+38 to +3.4E+32

-3.4E+38 to +3.4E+34

-3.4E+38 to +3.4E+36

-3.4E+38 to +3.4E+38

#41. Which of three sizes of floating point types should be used when extended precision is required?

long double

double

extended float

float

#42. Which is used to indicate single precision value?

Either F or for L or l

L or l

Neither F or for L or l

F or f

#43. Which is correct with respect to the size of the data types?

int < char < float

char < int < double

char > int < float

char < int < float

#44. The size of an object or a type can be determined using which operator?

calloc

malloc

sizeof

malloc

#45. It is guaranteed that a has at least 8 bits and a has at least 16 bits.

int, float

bool, char

char, short

char, int

#46. Size of C++ objects are expressed in terms of multiples of the size of a and the size of a char is ___

char, 1

float, 8

int, 1

char, 4

#47. Identify the incorrect option.

sizeof(char) <= sizeof(long) <=sizeof(wchar_t)

1 <= sizeof(bool) <= sizeof(long)

sizeof(N) = sizeof(signed N) = sizeof(unsigned N)

sizeof(float) <= sizeof(double) <= sizeof(long double)

#48. Which of the following will not return a value?

free

null

empty

void

#49. _______ have the return type void.

all functions

destructors

none of these

constructors

#50. What does the following statement mean?
void a;

declares a variable with value a

variable a is of type void

flags an error

a is an object of type void

#51. Choose the incorrect option.

void is also used when the value of a pointer is null

void is used as the base type for pointers to objects of unknown type

void is a special fundamental type

void is used when the function does not return a value

#52. Identify the incorrect option.

enumerator values start from 0 by default

enumerators are constants

enumerators are same as macros

enumerators are user-defined types

#53. In which type do the enumerators are stored by the compiler?

float

string & float

string

integer

#54. To which of these enumerators can be assigned?

all of the mentioned

enumerator

integer

negative

#55. What will happen when defining the enumerated type?

it will not allocate memory to its variables

it will not allocate memory

it will allocate memory

allocate memory to objects

#56. Which variable does equals in size with enum variable?

float variable

int variable

string variable

float & string variable

#57. Which is the correct syntax for defining an enumeration data type?

enum typename {enumeratorlist};

None of these

emum= typename

{enumeratorlist} = emum

#58. Identify the type of variables.
typedef char* CHAR;
CHAR p,q;

unknown

char

CHAR

char*

Finish

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For discussion about any question, join the below comment section. And get the solution of your query. Also, try to share your thoughts about the topics covered in this particular quiz.

#1. Pick the odd one out

#2. Which datatype is used to represent the absence of parameters?

#3. Which type is best suited to represent the logical values?

#4. Identify the user-defined types from the following?

#5. The value 146.37 can represented using which data type?

#6. Which of the following data types CANNOT store the number 47,255?

#7. Which data type holds the integers or real numbers with 8 bytes of memory allocated?

#8. Which data type holds the alphanumerics using character encoding? (size varies)

#9. Which holds whole numbers? (4 bytes)

#10. Which of the following belongs to the set of character types?

#11. In C++, what is the sign of character data type by default?

#12. What is size of void in bytes?

#13. Which is not an integer data type?

#14. ___ refers to the process of changing the data type of the value stored in a variable.

#15. ___ data types are structure, union, class and enumeration.

#16. What is the size of wchar_t in C++?

#17. Which of the following statements are true? int f(float)

#18. When a language has the capability to produce new data type mean, it can be called as

#19. Pick the odd one out.

#20. Is bool a fundamental data type in C++?

#21. Find the odd one out.

#22. What happens when a null pointer is converted into bool?

#23. Which of the following statements are false?

#24. For what values of the expression is an if-statement block not executed?

#25. Which of the two operators ++ and — work for the bool data type in C++?

#26. Evaluate the following. (false && true) || false || true

#27. How many characters are specified in the ASCII scheme?

#28. Given the variables p, q are of char type and r, s, t are of int type. Select the right statement?1. t = (r * s) / (r + s); 2. t = (p * q) / (r + s);

#29. How do we represent a wide character of the form wchar_t?

#30. Is the size of character literals different in C and C++?

#31. Suppose in a hypothetical machine, the size of char is 32 bits. What would sizeof(char) return?

#32. The size_t integer type in C++ is?

#33. Which of these expressions will return true if the input integer v is a power of two?

#34. What is the value of the following 8-bit integer after all statements are executed?int x = 1; x = x << 7; x = x >> 7;

#35. Which of these expressions will make the rightmost set bit zero in an input integer x?

#36. Which of these expressions will isolate the rightmost set bit?

#37. 0946, 786427373824, ‘x’ and 0X2f are _____ _____ ____ and _____ literals respectively.

#38. Which of the following is not one of the sizes of the floating point types?

#39. Which of the following is a valid floating-point literal?

#40. What is the range of the floating point numbers?

#41. Which of three sizes of floating point types should be used when extended precision is required?

#42. Which is used to indicate single precision value?

#43. Which is correct with respect to the size of the data types?

#44. The size of an object or a type can be determined using which operator?

#45. It is guaranteed that a ____ has at least 8 bits and a ____ has at least 16 bits.

#46. Size of C++ objects are expressed in terms of multiples of the size of a ____ and the size of a char is _______

#47. Identify the incorrect option.

#48. Which of the following will not return a value?

#49. _______ have the return type void.

#50. What does the following statement mean?void a;

#51. Choose the incorrect option.

#52. Identify the incorrect option.

#53. In which type do the enumerators are stored by the compiler?

#54. To which of these enumerators can be assigned?

#55. What will happen when defining the enumerated type?

#56. Which variable does equals in size with enum variable?

#57. Which is the correct syntax for defining an enumeration data type?

#58. Identify the type of variables.typedef char* CHAR; CHAR p,q;

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#17. Which of the following statements are true?
int f(float)

#26. Evaluate the following.
(false && true) || false || true

#28. Given the variables p, q are of char type and r, s, t are of int type. Select the right statement?
1. t = (r * s) / (r + s);
2. t = (p * q) / (r + s);

#34. What is the value of the following 8-bit integer after all statements are executed?
int x = 1;
x = x << 7;
x = x >> 7;

#37. 0946, 786427373824, ‘x’ and 0X2f are ___ _ and ___ literals respectively.

#45. It is guaranteed that a has at least 8 bits and a has at least 16 bits.

#46. Size of C++ objects are expressed in terms of multiples of the size of a and the size of a char is ___

#50. What does the following statement mean?
void a;

#58. Identify the type of variables.
typedef char* CHAR;
CHAR p,q;