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

1 / 45

The constants are also called as _____________

preprocessor

literals

const

variables

2 / 45

How to declare a wide character in the string literal?

W prefix

L prefix

Z prefix

l prefix

3 / 45

What we can?t do on a void pointer?

pointer objects

pointer arithmetic

pointer functions & objects

pointer functions

4 / 45

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

objects & data

data

members

objects

5 / 45

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

* operator is used to declare a reference

References must always be initialized inside classes

A variable can have more than one references

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

6 / 45

Which of the following function must use reference.

Destructor

Assignment operator function

Parameterized constructor

Copy Constructor

7 / 45

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

isdigit()

isalpha()

isalnum()

isblank()

8 / 45

What does a reference provide?

Alternate name for the variable

Alternate name for the pointer

Alternate name for the object

Alternate name for the class

9 / 45

The declaration of the structure is also called as?

structure specifier

structure signifier

structure creator

structure creator & signifier

10 / 45

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

11 / 45

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

array[6];

array[7];

array(7);

array;

12 / 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

13 / 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

14 / 45

Which of the following is incorrect?

References cannot be NULL

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 refer to a constant value

15 / 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;

16 / 45

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

array;

array(2);

array[0];

array[1];

17 / 45

What are the parts of the literal constants?

floating-point numerals

integer numerals

all of the mentioned

strings and boolean values

18 / 45

How are the constants declared?

#define preprocessor

$define

both const keyword and #define preprocessor

const keyword

19 / 45

The void pointer can point to which type of objects?

all of the mentioned

float

double

int

20 / 45

Which of the following operator is used while declaring references?

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 be used when terminating a structure?

}

;

;;

23 / 45

Pick the correct statement about references.

References once assigned cannot be changed to refer another variable

Reference should not be initialized when created

References can be assigned value NULL

Reference is the same as pointers

24 / 45

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

isprint()

isxdigit()

iscntrl()

ispunct()

25 / 45

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

isxdigit()

iscntrl()

ispunct()

isprint()

26 / 45

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

isblank()

isalnum()

isdigit()

isalpha()

27 / 45

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

b.var;

b>var;

b->var;

b-var;

28 / 45

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

isprint()

iscntrl()

isxdigit()

ispunct()

29 / 45

What is the difference between references and pointers?

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

References and pointers are similar

References stores address of variables whereas pointer points to variables

30 / 45

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

both const & volatile

static

volatile

const

31 / 45

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

isdigit()

isblank()

isalpha()

isalnum()

32 / 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 stores the address of variables

References and variables both have the same address

33 / 45

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

isalnum()

isblank()

iscntrl()

isspace()

34 / 45

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

isdigit()

isalnum()

isalpha()

isblank()

35 / 45

A void pointer cannot point to which of these?

methods & class member in c++

class member in c++

methods in c++

none of the mentioned

36 / 45

Which reference modifier is used to define the reference variable?

37 / 45

Identify the correct sentence regarding inequality between reference and pointer.

we can not create the array of reference

we can create the Array of reference

we can use reference to reference

we can use variable

38 / 45

What will happen when the structure is declared?

it will allocate the memory

it will be declared and initialized

it will be declared

it will not allocate any memory

39 / 45

How a reference is different from a pointer?

All of the mentioned

A reference cannot be null

The reference doesn?t need an explicit dereferencing mechanism

A reference once established cannot be changed

40 / 45

What are the references in C++?

A new type of constant variable

An alternative name for already existing variables

A pointer to a variable

A new type of variables

41 / 45

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

They end with a semicolon

These must be written on their own line

These are lines read and processed by the preprocessor

They do not produce any code by themselves

42 / 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

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

Both are same

Both are string literal

43 / 45

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

Programmer-defined

44 / 45

When does the void pointer can be dereferenced?

using shift keyword

when it doesn?t point to any value

when it cast to another type of object

using delete keyword

45 / 45

Which value can we not assign to reference?

unsigned

null

integer

floating

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