Types, Pointers, Arrays & Structures in C++ Quiz 2

1 / 45

The void pointer can point to which type of objects?

all of the mentioned

float

double

int

2 / 45

What are the parts of the literal constants?

integer numerals

floating-point numerals

strings and boolean values

all of the mentioned

3 / 45

How are the constants declared?

both const keyword and #define preprocessor

#define preprocessor

const keyword

$define

4 / 45

A void pointer cannot point to which of these?

none of the mentioned

methods in c++

methods & class member in c++

class member in c++

5 / 45

When does the void pointer can be dereferenced?

using shift keyword

using delete keyword

when it doesn?t point to any value

when it cast to another type of object

6 / 45

What does a reference provide?

Alternate name for the pointer

Alternate name for the variable

Alternate name for the object

Alternate name for the class

7 / 45

Which function is used to check whether a character is a tab or space?

isalpha()

isblank()

isalnum()

isdigit()

8 / 45

Which function is used to check whether a character is printable on console?

ispunct()

iscntrl()

isxdigit()

isprint()

9 / 45

The data elements in the structure are also known as what?

data

objects

objects & data

members

10 / 45

Which reference modifier is used to define the reference variable?

11 / 45

Which function is used to check whether a character is tab or space or whitespace control code(n,r,etc.)?

iscntrl()

isalnum()

isspace()

isblank()

12 / 45

Which of the following gives the memory address of the first element in array?

array;

array[1];

array[0];

array(2);

13 / 45

What we can?t do on a void pointer?

pointer functions & objects

pointer objects

pointer functions

pointer arithmetic

14 / 45

Which function is used to check whether a character is an alphabet?

isalpha()

isalnum()

isblank()

isdigit()

15 / 45

The difference between x and ?x? is?

The first one is a character constant x and the second one is the string literal x

Both are same

Both are string literal

The first one refers to a variable whose identifier is x and the second one refers to the character constant x

16 / 45

Which function is used to check whether a character is hexadecimal?

isprint()

isxdigit()

ispunct()

iscntrl()

17 / 45

Which function is used to check whether a character is a number?

isblank()

isalnum()

isalpha()

isdigit()

18 / 45

Which of the following accesses the seventh element stored in array?

array[7];

array(7);

array[6];

array;

19 / 45

What is size of generic pointer in C++ (in 32-bit platform)?

20 / 45

How to declare a wide character in the string literal?

W prefix

l prefix

Z prefix

L prefix

21 / 45

Which function is used to check whether a character is tab or a control code?

isspace()

isblank()

isalnum()

iscntrl()

22 / 45

What will happen when the structure is declared?

it will allocate the memory

it will not allocate any memory

it will be declared and initialized

it will be declared

23 / 45

Pick the correct statement about references.

Reference should not be initialized when created

References once assigned cannot be changed to refer another variable

References can be assigned value NULL

Reference is the same as pointers

24 / 45

Which of the following is incorrect?

A reference must be initialized when declared

References cannot be NULL

Once a reference is declared, it cannot be modified later to reference another object i.e. it cannot be reset

References cannot refer to a constant value

25 / 45

Which of the following statement is not true about preprocessor directives?

These are lines read and processed by the preprocessor

They end with a semicolon

These must be written on their own line

They do not produce any code by themselves

26 / 45

Pick the correct statement about references in C++.

References use dereferencing operator(*) to access the value of variable its referencing

References were also available in C

References and variables both have the same address

References stores the address of variables

27 / 45

Which of the following accesses a variable in structure *b?

b.var;

b-var;

b>var;

b->var;

28 / 45

What is the difference between references and pointers?

References and pointers are similar

References stores address of variables whereas pointer points to variables

Pointers are an alias for a variable whereas references stores the address of a variable

References are an alias for a variable whereas pointer stores the address of a variable

29 / 45

What will be used when terminating a structure?

;

;;

}

30 / 45

Which value can we not assign to reference?

integer

floating

null

unsigned

31 / 45

Which function is used to check whether a character is an alphabet or number?

isalpha()

isalnum()

isblank()

isdigit()

32 / 45

What is the correct definition of an array?

An array is an element of the different type

An array is a series of elements of the same type in contiguous memory locations

An array is a series of elements of the same type placed in non-contiguous memory locations

An array is a series of element

33 / 45

The declaration of the structure is also called as?

structure specifier

structure creator & signifier

structure signifier

structure creator

34 / 45

How a reference is different from a pointer?

A reference once established cannot be changed

A reference cannot be null

All of the mentioned

The reference doesn?t need an explicit dereferencing mechanism

35 / 45

What is the index number of the last element of an array with 9 elements?

Programmer-defined

36 / 45

Identify the correct sentence regarding inequality between reference and pointer.

we can use variable

we can not create the array of reference

we can create the Array of reference

we can use reference to reference

37 / 45

Which of the following operator is used while declaring references?

38 / 45

What are the references in C++?

A new type of variables

A new type of constant variable

An alternative name for already existing variables

A pointer to a variable

39 / 45

Which of the following statement(s) is/are correct?

A variable can have more than one references

References must always be initialized inside classes

* operator is used to declare a reference

A reference variable defined to refer a particular variable can refer to any other variable also

40 / 45

Identify the incorrect statement.

Reference is the alternate name of the variable

A reference value once defined cannot be reassigned

A reference value once defined can be reassigned

Reference is the alternate name of the object

41 / 45

The constants are also called as _____________

literals

variables

preprocessor

const

42 / 45

Which function is used to check whether a character is punctuation mark?

isxdigit()

isprint()

ispunct()

iscntrl()

43 / 45

The pointer can point to any variable that is not declared with which of these?

const

both const & volatile

volatile

static

44 / 45

Which of the following is a properly defined structure?

struct {int a;}

struct a_struct int a;

struct a_struct {int a;}

struct a_struct {int a;};

45 / 45

Which of the following function must use reference.

Assignment operator function

Parameterized constructor

Destructor

Copy Constructor

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