CS201 Introduction to Programming Solved MCQs

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Which of the following is true about streams?

A.    It is a sequence of bytes

B.    It is an ordered sequence

C.        All bytes can go through the stream simultaneously

D.    Bytes that enters first into the stream will go out at last

A only

C only

A and B

A and D

Stream is a sequence of bytes. It is an ordered sequence. Let’s compare it with the door example. The person who enters first will go out of the door first. The person who enters behind someone will go out behind that person. Similarly streams are also ordered sequence. The thing that enters first into the stream will go out first. You should think streams as ordered sequence of bytes. Byte is a unit of measure. A byte can store one character, so you can think of an ordered sequence of characters.

CS201 Introduction to Programming Solved MCQs

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1- Memory allocated from heap or free store _____________________.

Select correct option:

can be returned back to the system automatically

can be allocated to classes only

cannot be returned back unless freed explicitly using malloc and realloc

cannot be returned back unless freed explicitly using free and delete operators

2- Once the _______________ are created, they exist for the life time of the program

Select correct option:

local variables

non static variables

static variables

automatic variables

Once the static variables are created, they exist for the life of the program. They do not die. So returning their reference is all right.3- The members of a class declared with the keyword struct are _____________by default.

Select correct option:

static

private

protected

public.

The members of a class declared with the keyword struct are public by default. A structure is inherited publicly by default.

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4- If the memory in the free store is not sufficient ____________________.

Select correct option:

malloc function returns 1

malloc function returns 0

malloc functions returns NULL pointer

malloc function returns free space

if the memory in the free store is not sufficient enough to fulfill the request. malloc() function returns NULL pointer if the memory is not enough. In C++, 0 is returned instead of NULL pointer.

5. This reference to a variable can be obtained by preceding the identifier of a variable with ________________.

Select correct option:

dot operator

ampersand sign &

^ sign

• operator

6- Once an object is declared as a friend, _________________________.

Select correct option:

it has access to all non-public members as if they were public

it has access to public members only

it has no access to data members of the class

it has to protected data members only

• Friend declarations introduce extra coupling between classes
• Once an object is declared as a friend, it has access to all non-public members as if they were public
• Access is unidirectionalIf B is designated as friend of A, B can access A’s non-public members; A cannot access B’s
• A friend function of a class is defined outsideof that class’s scope

7- Reference variables must _________________.

Select correct option:

not be initialized after they are declared

be initialized after they are declared

contain integer value

contain zero value

8- If the request of new operator is not fulfilled due to insufficient memory in the heap ____________________.

Select correct option:

the new operator returns 2

the new operator returns 1

malloc functions returns NULL pointer

malloc function returns free space

9- Reference is not really an address it is ______________.

Select correct option:

a synonym

an antonym

a value

a number

10- If the request of new operator is not fulfilled due to insufficient memory in the heap ____________________.

Select correct option:

the new operator returns 2

the new operator returns 1

the operator returns 0

free operator returns nothing

11- Functions declared with the _______________ specifier in a class member list are called friend functions of that class. 
Select correct option: 

protected 
private

Public

friend

Functions declared with the friend specifier in a class member list are called friend functions of that class. Classes declared with the friend specifier in the member list of another class are called friend classes of that class.

12- public or private keywords can be ____________ 
Select correct option: 

written only for once in the class or structure declaration 
written multiple times in the class or structure declaration 
written only twice in the class declaration 
written outside the class

good practice is to write public or private keywords only once in the class or structure declaration, though there is no syntactical or logical problem in writing them multiple times.

13-The friend keyword provides access _____________. 
Select correct option: 

in one direction only 
in two directions 
to all classes 
to the data members of the friend class only

The friend keyword provides access in one direction only. This means that while OtherClass is a friend of ClassOne, the reverse is not true.

14- References cannot be uninitialized. Because it is impossible to _______________ 
Select correct option:

reinitialize a pointer 
reinitialize a reference 
initialize a NULL pointer 
cast a pointer

http://en.wikipedia.org/wiki/Reference_(C%2B%2B)

References cannot be uninitialized. Because it is impossible to reinitialize a reference,

15- new operator can be used for ______________.

Select correct option:

only integer data type

only char and integer data types

integer , float, char and double data types

dot operator

Similarly, new operator can be used for other data types like char, float and double etc.

16- The destructor is used to ______________.

Select correct option:

allocate memory

deallocate memory

create objects

allocate static memory

16- If we want to allocate memory to an array of 5 integers dynamically, the syntax will be _____________.

Select correct option:

int *iptr ; iptr = new int[5] ;

integer iptr** ; iptr= new int[5]

int iptr ; iptr= int [5]

iptr= new[5]

17- Memory allocated from heap or free store _____________________.

Select correct option:

can be returned back to the system automatically

can be allocated to classes only

cannot be returned back unless freed explicitly using malloc and realloc

cannot be returned back unless freed explicitly using free and delete operators 

18- Operator overloading is to allow the same operator to be bound to more than one implementation, depending on the types of the _________.

Select correct option:

Compilers

Operands

Function names

Applications

Operator overloading is to allow the same operator to be bound to more than one

implementation, depending on the types of the operands.

19- The operator to free the allocated memory using new operator is ________________.

Select correct option:

free

del

delete

remove

The operator to free the allocated memory using new operator is delete. So whenever,

we use new to allocate memory, it will be necessary to make use of ‘delete’ to deallocate

the allocated memory.

20- The concept of friend function negates the concept of _________________.

Select correct option:

inheritance

polymorphism

persistence

encapsulation

CS201 Introduction to Programming Solved MCQs

VU HELP CENTER : 03478749900

Functions declared with the _______________ specifier in a class member list are called friend functions of that class. 
protected 
private
public
friend

Functions declared with the friend specifier in a class member list are called friend functions of that class. Classes declared with the friend specifier in the member list of another class are called friend classes of that class.

Public or private keywords can be ____________ 

written only for once in the class or structure declaration 
written multiple times in the class or structure declaration 
written only twice in the class declaration 
written outside the class

good practice is to write public or private keywords only once in the class or structure declaration, though there is no syntactical or logical problem in writing them multiple times.

The friend keyword provides access _____________. 
in one direction only 
in two directions 
to all classes 
to the data members of the friend class only

The friend keyword provides access in one direction only. This means that while OtherClass is a friend of ClassOne, the reverse is not true.

References cannot be uninitialized. Because it is impossible to _______________ 

reinitialize a pointer 
reinitialize a reference 
initialize a NULL pointer 
cast a pointer
http://en.wikipedia.org/wiki/Reference_(C%2B%2B)
References cannot be uninitialized. Because it is impossible to reinitialize a reference,

new operator can be used for ______________.
only integer data type
only char and integer data types
integer , float, char and double data types
dot operator
Similarly, new operator can be used for other data types like char, float and double etc.

The destructor is used to ______________.

allocate memory
deallocate memory
create objects
allocate static memory

Reference is not really an address it is ______________.

a synonym
an antonym
a value
a number
Difference Between References and Pointers
The reference in a way keeps the address of the data entity. But it is not really an address it is a synonym,

If we want to allocate memory to an array of 5 integers dynamically, the syntax will be _____________.

int *iptr ; iptr = new int[5] ;

integer iptr** ; iptr= new int[5]

int iptr ; iptr= int [5]

iptr= new[5]

Memory allocated from heap or free store _____________________.

can be returned back to the system automatically

can be allocated to classes only

cannot be returned back unless freed explicitly using malloc and realloc

cannot be returned back unless freed explicitly using free and delete operators

The memory allocated from free store or heap is a system resource and is not returned back to the system unless explicitly freed using delete or free operators.

Operator overloading is to allow the same operator to be bound to more than one implementation, depending on the types of the _________.

Compilers
Operands
Function names
Applications

Operator overloading is to allow the same operator to be bound to more than one implementation, depending on the types of the operands.

The operator to free the allocated memory using new operator is ________________.

free
del
delete
remove

The operator to free the allocated memory using new operator is delete. So whenever, we use new to allocate memory, it will be necessary to make use of ‘delete’ to deallocate the allocated memory.

suppose we have int y[10]; To access the 4th element of the array we write_______

y[4];
y[3];
y[2];
none of given

From the following; which one is the range of Random number generator function rand()?

0 – 32768
1 – 32768
0 – 32767
1 – 32767

From following; which one is the correct syntax of an array initialize: Array size is 10 and it is of double data type to value 0?

arr[10] = {0.0};
double arr[10]= 0.0;
double arr[10] = {0.0};
double arr[] = 0.0;

The string in the array is terminated by a_____

zero
nil
null
one

CS201 Introduction to Programming Solved MCQs

VU HELP CENTER : 03478749900

In C/C++; by default arguments are passed by_____to a function.

Reference
Value
Type
Data

1
char name [] = “Hello World” ; In the above statement, a memory of_______characters will be allocated

13
11

12
10

_______Keyword is used to return some value from a function.

break
return
continue
goto

Which of the function call is call by value for the following function prototype? float add(int);

add(&x);
add(x);
add(int x);
add(*x);

The increment of a pointer depends on its_________.

variable

value
data type
None of the given

The ASCHI code of null character is_________

000
010
111
110

Pointers are a special type of __________in which a memory address is stored
variables
Location
Characters
None of the given

just for copy paste

CS201 Introduction to Programming Solved MCQs

VU HELP CENTER : 03478749900

Transpose of a matrix means that when we interchange rows and columns_____________

the first row becomes the Last column
the first row becomes the first column
the Last row becomes the first column
the first column becomes the first row

Pointers store the ____________________

value of a variable
memory address
characters
None of the given

Which of the following function call is “call by reference” for the following function prototype? int add (int *);

add(&x);
add(int x);
add(x);
add(*x);

The name of the array is a constant pointer which contains the memory address of the ____________of the array.

first element
Last element
second element
None of the given

array name always contains the memory address of the ___________of the array

entire elements
last element
first element
None of the given

At the___________, we try to break up the problem into functional units

analysis phase
design phase
Implementation phase
None of the given

1.  Each pass through a loop is called a/an
[a] enumeration
      [b] iteration
      [c] culmination
[d] pass through

2.  Which looping process checks the test condition at the end of the loop?
[a] for
[b] while
 [c] do-while
[d] no looping process checks the test condition at the end

3.  A continue statement causes execution to skip to
[a] the return 0; statement
[b] the first statement after the loop
[c] the statement following the continue statement
      [d] the next iteration of the loop

 4.  In a group of nested loops, which loop is executed the most number of times?
[a] the outermost loop
      [b] the innermost loop
      [c] all loops are executed the same number of times
[d] cannot be determined without knowing the size of the loops

 5.  The statement  i++;  is equivalent to
[a] i = i + i;
      [b] i = i + 1;
      [c] i = i – 1;
[d] i –;

 6.  Which looping process is best used when the number of iterations is known?
      [a] for
      [b] while
[c] do-while
[d] all looping processes require that the iterations be known

 7.  What’s wrong?  for (int k = 2, k <=12, k++)
[a] the increment should always be ++k
[b] the variable must always be the letter i when using a for loop
[c] there should be a semicolon at the end of the statement
[d] the commas should be semicolons

 8.  What’s wrong?  while( (i < 10) && (i > 24))
[a] the logical operator && cannot be used in a test condition
[b] the while loop is an exit-condition loop
      [c] the test condition is always false
      [d] the test condition is always true

 9.  If there is more than one statement in the block of a for loop, which of the following must be placed at the beginning and the ending of the loop block?
[a] parentheses ( )
      [b] braces { }
      [c] brackets [ ]
[d] arrows < >

 10.  What’s wrong?  (x = 4 && y = 5) ? (a = 5) ; (b = 6);
[a] the question mark should be an equal sign
      [b] the first semicolon should be a colon
      [c] there are too many variables in the statement
[d] the conditional operator is only used with apstrings