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

1 / 45

Identify the incorrect statement.

A reference value once defined cannot be reassigned

A reference value once defined can be reassigned

Reference is the alternate name of the object

Reference is the alternate name of the variable

2 / 45

What will happen when the structure is declared?

it will not allocate any memory

it will be declared and initialized

it will be declared

it will allocate the memory

3 / 45

Which of the following function must use reference.

Copy Constructor

Assignment operator function

Parameterized constructor

Destructor

4 / 45

What will be used when terminating a structure?

;

;;

}

5 / 45

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

array[1];

array(2);

array;

array[0];

6 / 45

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

isprint()

isxdigit()

iscntrl()

ispunct()

7 / 45

What we can?t do on a void pointer?

pointer arithmetic

pointer objects

pointer functions & objects

pointer functions

8 / 45

What is the difference between references and pointers?

References and pointers are similar

References stores address of variables whereas pointer points to variables

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

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

9 / 45

What are the references in C++?

A pointer to a variable

An alternative name for already existing variables

A new type of variables

A new type of constant variable

10 / 45

The void pointer can point to which type of objects?

int

double

all of the mentioned

float

11 / 45

Pick the correct statement about references in C++.

References and variables both have the same address

References were also available in C

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

References stores the address of variables

12 / 45

Which reference modifier is used to define the reference variable?

13 / 45

The constants are also called as _____________

preprocessor

variables

literals

const

14 / 45

Pick the correct statement about references.

Reference is the same as pointers

References once assigned cannot be changed to refer another variable

Reference should not be initialized when created

References can be assigned value NULL

15 / 45

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

isspace()

isblank()

iscntrl()

isalnum()

16 / 45

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

array;

array[7];

array(7);

array[6];

17 / 45

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

18 / 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

19 / 45

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

isalpha()

isblank()

isdigit()

isalnum()

20 / 45

How are the constants declared?

$define

both const keyword and #define preprocessor

#define preprocessor

const keyword

21 / 45

A void pointer cannot point to which of these?

methods & class member in c++

none of the mentioned

methods in c++

class member in c++

22 / 45

Which value can we not assign to reference?

floating

unsigned

null

integer

23 / 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 string literal

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

Both are same

24 / 45

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

isprint()

isxdigit()

iscntrl()

ispunct()

25 / 45

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

isalnum()

isblank()

isalpha()

isdigit()

26 / 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;}

27 / 45

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

isalpha()

isalnum()

isblank()

isdigit()

28 / 45

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

ispunct()

iscntrl()

isxdigit()

isprint()

29 / 45

What are the parts of the literal constants?

strings and boolean values

floating-point numerals

integer numerals

all of the mentioned

30 / 45

Which of the following operator is used while declaring references?

31 / 45

The declaration of the structure is also called as?

structure specifier

structure signifier

structure creator

structure creator & signifier

32 / 45

Identify the correct sentence regarding inequality between reference and pointer.

we can not create the array of reference

we can use reference to reference

we can create the Array of reference

we can use variable

33 / 45

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

data

objects

objects & data

members

34 / 45

What is the correct definition of an array?

An array is a series of element

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

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

An array is an element of the different type

35 / 45

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

b-var;

b.var;

b>var;

b->var;

36 / 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

A reference must be initialized when declared

References cannot be NULL

37 / 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

38 / 45

What does a reference provide?

Alternate name for the pointer

Alternate name for the class

Alternate name for the object

Alternate name for the variable

39 / 45

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

isalnum()

isalpha()

isdigit()

isblank()

40 / 45

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

volatile

static

both const & volatile

const

41 / 45

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

isspace()

isblank()

isalnum()

iscntrl()

42 / 45

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

Programmer-defined

43 / 45

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

A variable can have more than one references

* operator is used to declare a reference

References must always be initialized inside classes

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

44 / 45

When does the void pointer can be dereferenced?

when it doesn?t point to any value

using shift keyword

when it cast to another type of object

using delete keyword

45 / 45

How to declare a wide character in the string literal?

L prefix

W prefix

l prefix

Z prefix

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