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

1 / 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

2 / 45

Which value can we not assign to reference?

floating

integer

unsigned

null

3 / 45

When does the void pointer can be dereferenced?

when it doesn?t point to any value

when it cast to another type of object

using shift keyword

using delete keyword

4 / 45

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

isalpha()

isdigit()

isblank()

isalnum()

5 / 45

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

isalnum()

isblank()

iscntrl()

isspace()

6 / 45

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

objects & data

members

objects

data

7 / 45

What is the difference between references and pointers?

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

References stores address of variables whereas pointer points to variables

References and pointers are similar

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

8 / 45

Which of the following function must use reference.

Copy Constructor

Parameterized constructor

Assignment operator function

Destructor

9 / 45

What are the parts of the literal constants?

all of the mentioned

floating-point numerals

strings and boolean values

integer numerals

10 / 45

Which of the following operator is used while declaring references?

11 / 45

What are the references in C++?

An alternative name for already existing variables

A new type of variables

A pointer to a variable

A new type of constant variable

12 / 45

How a reference is different from a pointer?

All of the mentioned

A reference once established cannot be changed

The reference doesn?t need an explicit dereferencing mechanism

A reference cannot be null

13 / 45

Which of the following is a properly defined structure?

struct a_struct {int a;};

struct a_struct int a;

struct {int a;}

struct a_struct {int a;}

14 / 45

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

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

References must always be initialized inside classes

A variable can have more than one references

* operator is used to declare a reference

15 / 45

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

isalnum()

isblank()

isalpha()

isdigit()

16 / 45

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

isxdigit()

isprint()

ispunct()

iscntrl()

17 / 45

What is the correct definition of an array?

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 an element of the different type

An array is a series of element

18 / 45

The declaration of the structure is also called as?

structure signifier

structure specifier

structure creator & signifier

structure creator

19 / 45

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

static

const

volatile

both const & volatile

20 / 45

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

array[1];

array[0];

array(2);

array;

21 / 45

Pick the correct statement about references.

Reference is the same as pointers

References once assigned cannot be changed to refer another variable

References can be assigned value NULL

Reference should not be initialized when created

22 / 45

A void pointer cannot point to which of these?

methods & class member in c++

methods in c++

class member in c++

none of the mentioned

23 / 45

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

ispunct()

isxdigit()

isprint()

iscntrl()

24 / 45

Which reference modifier is used to define the reference variable?

25 / 45

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

array[6];

array;

array[7];

array(7);

26 / 45

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

isxdigit()

ispunct()

iscntrl()

isprint()

27 / 45

Identify the incorrect statement.

Reference is the alternate name of the object

Reference is the alternate name of the variable

A reference value once defined cannot be reassigned

A reference value once defined can be reassigned

28 / 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

29 / 45

Which of the following is incorrect?

References cannot refer to a constant value

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

References cannot be NULL

A reference must be initialized when declared

30 / 45

What we can?t do on a void pointer?

pointer objects

pointer functions & objects

pointer arithmetic

pointer functions

31 / 45

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

iscntrl()

isblank()

isalnum()

isspace()

32 / 45

How are the constants declared?

#define preprocessor

both const keyword and #define preprocessor

const keyword

$define

33 / 45

The difference between x and ?x? is?

Both are same

Both are string literal

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

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

34 / 45

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

These are lines read and processed by the preprocessor

They do not produce any code by themselves

They end with a semicolon

These must be written on their own line

35 / 45

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

b->var;

b.var;

b>var;

b-var;

36 / 45

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

Programmer-defined

37 / 45

Pick the correct statement about references in C++.

References and variables both have the same address

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

References stores the address of variables

References were also available in C

38 / 45

What does a reference provide?

Alternate name for the pointer

Alternate name for the variable

Alternate name for the class

Alternate name for the object

39 / 45

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

40 / 45

What will be used when terminating a structure?

}

;

;;

41 / 45

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

isblank()

isalnum()

isalpha()

isdigit()

42 / 45

The void pointer can point to which type of objects?

double

int

float

all of the mentioned

43 / 45

How to declare a wide character in the string literal?

W prefix

l prefix

L prefix

Z prefix

44 / 45

The constants are also called as _____________

preprocessor

const

variables

literals

45 / 45

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

isalpha()

isblank()

isalnum()

isdigit()

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