CS201 Introduction to Programming Solved MCQs

Question No: 1      ( Marks: 1 ) - Please choose one

A precise sequence of steps to solve a problem is called

► Statement

► Program

► Utility

► Routine

Question No: 2      ( Marks: 1 ) - Please choose one

The Compiler of C language is written in

► Java Language

► UNIX

► FORTRON Language

► C Language

The C language is so powerful that the compiler of C and other various operating systems are written in C.

Question No: 3      ( Marks: 1 ) - Please choose one

Initialization of variable at the time of definition is,

► Must

► Necessary

► Good Programming

► None of the given options

Question No: 4      ( Marks: 1 ) - Please choose one

In if structure the block of statements is executed only,

► When the condition is false

► When it contain arithmetic operators

► When it contain logical operators

► When the condition is true

Question No: 5      ( Marks: 1 ) - Please choose one

Which of the following function(s) is/are included in stdlib.h header file?

► double atof(const char *nptr)

► int atoi(const char *nptr)

► char *strcpy ( char *s1, const char *s2)

► 1 and 2 only

Question No: 6      ( Marks: 1 ) - Please choose one

Dealing with structures and functions passing  by reference is the most economical method

► True

► False

Question No: 7      ( Marks: 1 ) - Please choose one

Pointer is a variable which store,

► Data

► Memory Address

► Data Type

► Values

Question No: 8      ( Marks: 1 ) - Please choose one

Preprocessor program perform its function before ______ phase takes place.

► Editing

► Linking

► Compiling

► Loading

The C preprocessor modifies a source code file before handing it over to the compiler. You're most likely used to using the preprocessor to include files directly into other files,

Question No: 9      ( Marks: 1 ) - Please choose one

Which of the following can not be a variable name?

► area

► _area

► 10area

► area2

Question No: 10      ( Marks: 1 ) - Please choose one

Which looping process is best, when the number of iterations is known?

► for

► while

► do-while

► all looping processes require that the iterations be known

Question No: 11      ( Marks: 1 ) - Please choose one

Which character is inserted at the end of string to indicate the end of string?

► new line

► tab

► null

► carriage return

null character inserted at the end of the string by C automatically

Question No: 12      ( Marks: 1 ) - Please choose one

How many bytes are occupied by declaring following array of characters?

char str[] = “programming”;

► 10

► 11

► 12

► 13

11 plus one for null char (11+1= 12)

Question No: 13      ( Marks: 1 ) - Please choose one

Which of the following header file defines the rand() function?

► iostream.h

► conio.h

► stdlib.h

► stdio.h

The function is rand() and is in the standard library. To access this function, we need to include <stdlib.h> library in our program. This function will return a random number. The number can be between 0 and 32767.

Question No: 14      ( Marks: 1 ) - Please choose one

Commenting the code _____________________

► Makes a program easy to understand for others.

► Make programs heavy, i.e. more space is needed for executable.

► Makes it difficult to compile

► All of the given options.

Question No: 15      ( Marks: 1 ) - Please choose one

What's wrong with this for loop?

for (int k = 2, k <=12, k++)

► the increment should always be ++k

► the variable must always be the letter i when using a for loop

► there should be a semicolon at the end of the statement

► the commas should be semicolons

Question No: 16      ( Marks: 1 ) - Please choose one

For which array, the size of the array should be one more than the number of elements in an array?

► int

► double

► float

► char

Question No: 17      ( Marks: 1 )

To Which category of the software “Compiler and Interpreter” belongs?

They belong to system software.

There are two type of system software

1.       Operating system

2.       Language translators.

These are part of language translators

Question No: 18      ( Marks: 1 )

What is the result of the expression x = 2 + 3 * 4 – 4 / 2

12

first multiplies 3*4 = 12 then Division  4/2 = 2

2+12-2 = 12

Question No: 19      ( Marks: 2 )

Write a declaration statement for an array of 10 elements of type float. Include an initialization statement of the first four elements to 1.0, 2.0, 3.0 and 4.0.

float tmp [10] = {1.0,2.0,3.0,4.0};

Question No: 20      ( Marks: 3 )

Write down the output of the following code?

int array[7], sum = 0;

for(int i=0;i<7;i++)

{

array[i] = i;

sum+= array[i];

}

cout<< “ Sum = “ <<sum;

answer: 21

Loop will run  times starts from zero and add values from 1 to 6 which is equal to 21

http://groups.google.com/group/vuZs

What will be the output of the following segment of C++ code?

int A[5] = {1 , 2, 3, 4};

int i;

for (i=0; i<5; i++)

{

A[i] = 2*A[i];

cout << A[i] << "  ";

}

2 4 6 8 0

Loops will run 5 times as its starting from zero. It will multiply the value of each item in array as last time is not initialized so it will multiply it with zero to give zero as output

Question No: 22      ( Marks: 10 ) 

Write a C++ program that will determine if a departmental store customer has exceeded the credit limit on a charge account.

Program should input the following facts in five variables

1. Account number

2. Balance at the beginning of month  (Beginning balance)

3. total of all items charged by customer this month  (charges)

4. total of all credits (credits)

5. allowed credit limit

Calculate the new balance

New balance = Beginning balance + charges – credits

Determine if new balance exceeds the allowed credit limit. For those customers whose credit limit is exceeded. The program should display the message “Credit Limit exceeded.”

1.     The statement cout << yptr will show the __________the yptr points to.
Value
Memory Address
Variabvle
None of given

2.  char **argv can be read as__________________.
     Pointer to Pimter
     Pointer to Char
     Pointer to Pointer to Char  (page 177)
     None of given

2.     _______________are conventional names of the command line parameters of the ‘main()’ function.
‘argb’ and ‘argv’
‘argc’ and ‘argv’
‘argc’ and ‘argu’
None of Given

3.      ___________ Returns true if c is a digit and false otherwise.
int isalpha( int c )
int isalnum( int c )
int isxdigit( int c )
int isdigit( int c )

4.     In the case of pointer to pointer or _______________, the first pointer contains the address of the      second pointer, which contains the address of the variable, which contains the desired value.
double dereference (page 175)
Single dereference
dereference
None of the given

5.     _______________________ contains functions for manipulations of character data.
ctype.h
iostream.h
string.h
None of the given

6.     Dereferencing operator is represented by _______
*
+
-
None of the given

7.     In_________, we try to have a precise problem statement
Analysis
Design
Coding
None of the given

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.

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 unidirectional If 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 outside of 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 

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 freeoperators.

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