mega file CS201- Introduction to Programming Latest Solved Mcqs from Final term Papers

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CS201- Introduction to Programming
Latest Solved Mcqs from Final term Papers

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FINALTERM  EXAMINATION

Fall 2008

CS201- Introduction to Programming

Time: 120 min                                                                                               Marks: 75

 

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

There are mainly -------------------- types of software

       ► Two

       ► Three

       ► Four

       ► Five

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

seekg() and write() are functionally _________________ .

       ► Different

       ► Identical

       ► Two names of same function

       ► None of the above

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

 When a pointer is incremented, it actually jumps the number of memory addresses

       ► According to data type

       ► 1 byte exactly

       ► 1 bit exactly

       ► A pointer variable can not be incremented

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

setw is a parameterized manipulator.

       ► True

       ► False

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

 eof( ), bad( ), good( ), clear( ) all are manipulators.

       ► True

       ► False

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

In functions that return reference, use __________variables.

       ► Local

      ► Global

       ► Global or static

       ► None of the given option

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

The declarator of Plus (+) member operator function is

       ► Class-Name  operator + (Class-Name  rhs)

       ► operator Class-Name + ( )

      ► operator Class-Name + ( rhs)

       ► Class-Name  operator + ( )

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

The compiler does not provide a copy constructor if we do not provide it.

       ► True

       ► False

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

What is the functionality of the following syntax to delete an array of 5 objects named arr allocated using new operator?

delete arr ;

       ► Deletes all the objects of array

       ► Deletes one object of array 

       ► Do not delete any object

       ► Results into syntax error

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

What is the sequence of event(s) when allocating memory using new operator?

      ► Only block of memory is allocated for objects

       ► Only constructor is called for objects

       ► Memory is allocated first before calling constructor

       ► Constructor is called first before allocating memory

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

What is the sequence of event(s) when deallocating memory using delete operator?

       ► Only block of memory is deallocated for objects

       ► Only destructor is called for objects

       ► Memory is deallocated first before calling destructor

       ► Destructor is called first before deallocating memory

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

new and delete operators cannot be overloaded as member functions.

       ► True

       ► False

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

The operator function of and >> operators are always the member function of a class.

       ► True

       ► False

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

A template function must have at least ---------- generic data type

       ► Zero

       ► One

       ► Two

       ► Three

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

If we do not mention any return_value_type with a function, it will return an _____ value.

       ► int

       ► void

       ► double

       ► float

Such function which do not return any value are called:

       ► int

       ► void

       ► double

       ► float

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

Suppose a program contains an array declared as int arr[100]; what will be the size of array?

       ► 0

       ► 99

       ► 100

       ► 101

Question No: 17      ( Marks: 1 ) - Please choose one

The name of an array represents address of first location of array element.

       ► True

       ► False

Question No: 18      ( Marks: 1 ) - Please choose one

Reusing the variables in program helps to save the memory

       ► True

       ► False

Question No: 19      ( Marks: 1 ) - Please choose one

Which of the following option is true about new operator to dynamically allocate memory to an object?

       ► The new operator determines the size of an object

       ► Allocates memory to object and returns pointer of valid type

       ► Creates an object and calls the constructor to initialize the object

       ► All of the given options

Question No: 20      ( Marks: 1 ) - Please choose one

new and delete are _____ whereas malloc and free are _____.

       ► Functions, operators

       ► Classes, operators

       ► Operators, functions

       ► Operators, classes

Question No: 21      ( Marks: 1 ) - Please choose one

Like member functions, ______ can also access the private data members of a class.

       ► Non-member functions

       ► Friend functions

       ► Any function outside class

       ► None of the given options

Question No: 22      ( Marks: 1 ) - Please choose one

Which of the following statement is best regarding declaration of friend function?

       ► Friend function must be declared after public keyword.

       ► Friend function must be declared after private keyword.

       ► Friend function must be declared at the top within class definition.

       ► It can be declared anywhere in class as these are not affected by the public and private keywords.

Question No: 23      ( Marks: 1 ) - Please choose one

The operator function overloaded for an Assignment operator (=) must be

       ► Non-member function of class

       ► Member function of class

       ► Friend function of class

       ► None of the given options

Question No: 24      ( Marks: 1 ) - Please choose one

For non-member operator function, object on left side of the operator may be

       ► Object of operator class

       ► Object of different class

       ► Built-in data type

       ► All of the given options

Question No: 25      ( Marks: 1 ) - Please choose one

The operator function will be implemented as _____, if obj1 drive the - operator whereas obj2 is passed as arguments to - operator in the statement given below.

obj3   =   obj1 -   obj2;

       ► Member function

       ► Non-member function

       ► Friend function

       ► None of the given options

Question No: 26      ( Marks: 1 ) - Please choose one

Which one of the following is the declaration of overloaded pre-increment operator implemented as member function?

       ► Class-name operator +() ;

       ► Class-name operator +(int) ;

       ► Class-name operator ++() ;

       ► Class-name operator ++(int) ;

Question No: 27      ( Marks: 1 ) - Please choose one

The static data members of a class are initialized _______

       ► at file scope

       ► within class definition

       ► within member function

       ► within main function

Question No: 28      ( Marks: 1 ) - Please choose one

Class is a user defined___________.

       ► data type

       ► memory referee

       ► value

       ► none of the given options.

Question No: 29      ( Marks: 1 ) - Please choose one

We can also define a user-defines manipulators.

       ► True

       ► False

Question No: 30      ( Marks: 1 ) - Please choose one

Automatic variable are created on ________.

       ► Heap

       ► Free store

       ► static storage

       ► stack

Question No: 31      ( Marks: 1 )

How do we provide the default values of function parameters?

 

Answer: The default value of a parameter is provided inside the function prototype or function definition. For example, we could declare the default function arguments for a function while declaring or defining it.

 

Question No: 32      ( Marks: 1 )

Why do java consider pointer as dangerous

Answer:

The concept of pointers is very important but quite limited to C and C++. The modern languages, for example JAVA, describe pointers as dangerous. We can go anywhere in the memory and can change a value. There is another problem with pointers, which is that these could be pointing to nowhere.

 

Question No: 33      ( Marks: 2 )

What is memory leak?

Answer: size. When there is no memory on heap, the computer will stop running and there may be a system crash. This situation is called a memory leak.

 

Question No: 34      ( Marks: 2 )

What does optimization the of code means?

Answer:

Header file is a nice mechanism to put function prototypes and define constants (global constants) in a single file. That file can be included simply with a single line of code.

 

Question No: 35      ( Marks: 3 )

What is the difference between structure and class?
Answer:

In structures, some data variables are gathered, grouped and named as a single entity. Class and structure are very closely related. In classes, we group some data variables and functions. These functions normally manipulate these variables. Before going ahead, it is better to understand what a class is: “A class includes both data members as well as functions to manipulate that data”

 

Question No: 36      ( Marks: 3 )

See the following code segment.

template <class T>

class myclass {

private:

            T x;

public:

            myclass (T a) {

            x = a;

            }

};

Write the main function which creates two objects of class for int and double data types.

Question No: 37      ( Marks: 3 )

Is it possible to define two functions as given below? Justify your answer.

func(int x, int y)

func(int &x, int &y)

Solution:

No, it is impossible to define two functions as in the main function the way to call both functions is same. How does the compiler know that which functions is being called? There is no way for the compiler to find out. Therefore there is an ambiguity and that is not allowed. The only thing to realize is the side effect. Side effects are critical to take care of whenever you are doing call by reference.

 

Question No: 38      ( Marks: 5 )

Write a program using getline() member function to inputs a string up to delimiter character comma (,) and then display the string on the screen.

Question No: 39      ( Marks: 5 )

 

Do you think that friend functions violate encapsulation? Justify your answer.

Answer:

The friend functions of a class have access to the private data members of class. Despite being a good thing, there is possibility of vulnerability. We are opening our thoughts, inside view for somebody else. Without having 100% trust, it will be risky to make our thoughts and feelings public. We want that our private data is accessible to someone outside, not public for everybody. Otherwise, the data encapsulation and data-hiding concept will be violated. We keep the data members private and declare some specific functions that are not member of the class but friend of the class. As friends, they have access to the inside data structure of the class despite not being members.

 

Question No: 40      (Marks: 10 )

 

 

Write a simple program using the get() member function of cin object reading a text of 30 characters from the keyboard, store them in an array and then using put() member function of cout object to display them on the screen.

 

Question No: 41      (Marks: 10 )

 

 

Write a small program which defines two user-defined manipulators named octal and hexadecimal. These manipulators should display the decimal numbers into octal and hexadecimal.

In the main function, input a decimal number from the user and then display this decimal number into octal and hexadecimal using user-define manipulators named octal and hexadecimal.

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CS201 Solved Final Term Papers 

See the attached file please

[+ M.Tariq Malik]

FINALTERM EXAMINATION

CS201 - Introduction to programming

Final Term Spring 2010

 

Operator overloading can be performed through__________________.

       ► Classes

       ► Functions

       ► Operators

       ► Reference

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

When a value is referred by a normal variable then it is known as,

       ► Direct Reference

         ► Indirect Reference

       ► Partial Reference

       ► Proper Reference

When a value is referred by a normal variable is known as direct reference

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

Which of the following function is used to increase the size of already allocated memory chunk?

 

        ► malloc

       ► calloc

       ► realloc

       ► free

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

Which of the following is NOT a preprocessor directive?

       ► #error

       ► #define

       ► #line

       ► #ndefine

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

The stream objects cin and cout are included in which header file?

         ► iostream.h

       ► fstream.h

       ► istream.h

       ► ostream.h

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

Overloaded delete operator function takes the same parameter as an argument returned by new operator function.

        ► True

       ► False

 

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

When an array of object is created dynamically then there is no way to provide parameterized constructors for array of objects.

         ► True

       ► False

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

C is widely known as development language of _______ operating system.

       ► Linux

       ► Windows

         ► Unix

  ► Mac OS

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

Computer can understand only machine language code.

        ► True

 

       ► False

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

We can not define a function as a friend of a Template class.

       ► True

         ► False

    

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

What will be the value of ‘a’ and ‘b’ after executing the following statements?

a = 3;

b = a++;

       ► 3, 4

       ► 4, 4

       ► 3, 3

       ► 4, 3

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

Consider the following code segment. What will be the output of following code?

int addValue (int *a){

int b = (*a) + 2;

return b ;

}  

main () {

int x =6 ;

cout   x “,” ;

cout addValue(&x) “,” ;

cout   x ;

}

       ► 6,8,6

       ► 6,6,8

       ► 6,8,8

       ► 6,6,6

 

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

 _______ is used to trace the logic of the program and correct the logical errors.

       ► Compiler

       ► Editor

       ► Linker

       ► Debugger

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

new and delete are _____ whereas malloc and free are _____.

       ► Functions, operators

       ► Classes, operators

       ► Operators, functions

       ► Operators, classes

 

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

Like member functions, ______ can also access the private data members of a class.

       ► Non-member functions

       ► Friend functions

       ► Any function outside class

       ► None of the given options

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

Which situation would require the use of a non-member overloaded operator?

       ► The overloaded operator is an Assignment operator.

       ► The left most operand is an object of a class.

       ► The left operand is built-in data type.

       ► The operator returns a reference.

Question No: 17      ( Marks: 1 ) - Please choose one

The stream insertion and stream extraction operators are already overloaded for ______.

       ► User-defined data types

       ► Built-in data types

       ► User-defined and built-in data types

       ► None of the given options

Question No: 18      ( Marks: 1 ) - Please choose one

If we define an identifier with the statement #define PI 3.1415926 then during the execution of the program the value of PI __________.

       ► can not be replaced

       ► None of the given options

       ► Remain constant.

       ► can be changed by some operation

Question No: 19      ( Marks: 1 ) - Please choose one vuzs

Assignment operator is -------------------------associative.

       ► right

       ► left

       ► binary

       ► unary

 

Question No: 20      ( Marks: 1 ) - Please choose one

When ever dynamic memory allocation is made in C/C++, it is freed_____________.

       ► Explicitly

       ► Implicitly

       ► Both explicitly and implicitly

       ► None of the given options

Question No: 21      ( Marks: 1 ) - Please choose one

The appropriate data type to store the number of rows and colums of the matrix is____________.

       ► float

       ► int

       ► char

   Question No: 22      ( Marks: 1 ) - Please choose one

Which of the following function do NOT initialize the chunk of memory to all zero?

       ► calloc() function 

       ► Both malloc() and calloc()

       ► None of the above 

       ► malloc() function 

Question No: 23      ( Marks: 1 ) - Please choose one

The function free() returns back the allocated memory got thorough calloc and malloc to _____ .

       ► stack

       ► heap

       ► stack and heap

       ► None of the given options

 

Question No: 24      ( Marks: 1 ) - Please choose one

width() is member function of _____________

       ► cin object

       ► cout object

       ► Both cin and cout object

       ► None of the given option

 

 

Question No: 25      ( Marks: 1 ) - Please choose one

Templates are not type safe.

       ► true

       ► false

Question No: 26      ( Marks: 1 ) - Please choose one

A Matrix can be composed of ints, floats or doubles as their elements. Best way is to handle this , _______________

       ► Write a separate class to handle each

       ► Use templates

       ► Use strings to store all types

       ► None of the given options

Question No: 27      ( Marks: 2 )

Give the general syntax of class template.

template

class myclass { ---} ;

Question No: 28      ( Marks: 2 )

What is a truth Table?

There are some areas where the decision structures become very complicated. Sometimes, we find it difficult to evaluate a complicated logical expression. Sometimes the logic becomes extremely complicated so that even writing it as a simple syntax statement in any language. It becomes complicated to determine what will be evaluated in what way. We know the concept of truth table. The truth tables are very important. These are still a tool available for analyzing logical expressions. We will read logic design in future, which is actually to do with chips and gates. How we put these things together.

Question No: 29      ( Marks: 2 )

 

What will be the output of following code, if user input a number 123?

int input ;

cin >> oct >> input;

cout hex input ;

 

53

Rational: it will take 123 as octal and print it in hex form which is 53.

 

Question No: 30      ( Marks: 2 )

What is principle of friendship in the context of functions and classes?

Class can declare a friend function and someone from outside the class cannot declare itself friend of a class.

A friend function can access the private variables of class just like a member function

 

Question No: 31      ( Marks: 3 )

What are the limitations of the friendship relation between classes?

Class can declare a friend class from inside and someone from outside the class cannot declare itself friend of a class.

 

Question No: 32      ( Marks: 3 )

Suppose an object of class A is declared as data member of class B.

(i) The constructor of which class will be called first? a

(ii) The destructor of which class will be called first?b

 

Question No: 33      ( Marks: 3 )

Define static variable. Also explain life time of static variable?

When you declare a static variable (native data type or object) inside a function, it is created and initialized only once during the lifetime of the program

 

Question No: 34      ( Marks: 5 )

 Write a program which defines three variables of type double which store three different values including decimal points, using setprecision manipulators to print all these values with different number of digits after the decimal number.

#include

#include

main () {

double a = 12.12345;

double b = 13.123456;

double c = 14.1234567;

cout setprecision (5) a endl;

cout setprecision (2) a endl;

cout setprecision (3) a endl;

}

Question No: 35      ( Marks: 5 )

Let we have a class,

class String

{

private:

char  buf[25];

};

Write code for assignment (=) operator function which assign one String object to other object. Your code should also avoid self assignment

 

Answer:

void String::operator = ( const String &other )

 { int length ;

 length = other.length();

delete buf;

 buf = new char [length + 1];

 strcpy( buf, other.buf ); }

 

Question No: 36      ( Marks: 5 )

Read the given below code and explain what task is being performed by this function

Matrix :: Matrix ( int row , int col )

{

    numRows = row ;

    numCols = col ;

    elements = new ( double * ) [ numRows ] ;

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

{

        elements [ i ] = new double [ numCols ] ;

        for ( int j = 0 ; j < numCols ; j ++ )

                elements [ i ] [ j ] = 0.0 ;

     }

}

Hint : This function belong to a matrix class, having

Number of Rows = numRows

Number of Columns = numCols 

[+ M.Tariq Malik]

FINALTERM  EXAMINATION

Spring 2010

CS201- Introduction to Programming

Marks: 58 

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

Header file: fstream.h includes the definition of the stream classes __________.

       ► ifstream, fstream, cout

       ► ifstream, fstream, ofstream

       ► fstream, cin, cout

       ► None of the above

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

To access the data members of structure _______ is used.

       ► dot operator (.)

       ► * operator

       ►  operatorà

       ► None of given. 

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

eof( ), bad( ), good( ), clear( ) all are manipulators.

       ► True

       ► False 

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

Which kind of functions can access private member variables of a class?

       ► Friend functions of the class

       ► Private member functions of the class

       ► Public member functions of the class

       ► Friend, private and public functions

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

The return type of operator function must always be void.

       ► True

       ► False

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

Friend function of a class is ______________ .

       ► Member function

       ► Non-member function             

       ► Private function

       ► Public function

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

Function implementation of friend function must be defined outside the class.

       ► True

       ► False (any where in the class)

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

The normal source of cin object is,

       ► File

       ► Disk

       ► Keyboard

       ► RAM

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

Which of the following is correct way to initialize a variable x of int type with value 10?

       ► int x ; x = 10;

       ► int x = 10;

       ► int x, x = 10;

       ► x = 10; ADEEL ABBAs

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

Consider the following code segment. What will be the output of the following program?

int func(int) ;

int num = 10 ;

int main(){

int num ;

num = 5 ;

cout num ;

cout func(num) ;

}

int func(int x){

return num ;

}

       ► 5, 5  

       ► 10, 5

       ► 5, 10 

       ► 10, 10

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

With template function, the compiler automatically detects the passed data and generates a new copy of function using passed data.

       ► True

       ► False

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

What will be the correct syntax to declare two-dimensional array of float data type?

       ► float arr{2}{2} ;

       ► float arr[2][2] ;

       ► float arr[2,2] ;

       ► float[2][2] arr ;   

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

The first parameter of operator function for operator,

       ► Must be passed by value

       ► Must be passed by reference

       ► Can be passed by value or reference

       ► Must be object of class 

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

Heap is constantly changing in size.

       ► True

       ► False

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

While calling function, the arguments are assigned to the parameters from

       ► left to right.

       ► right to left 

       ► no specific order is followed

       ► none of the given options.

Question No: 17      ( Marks: 1 ) - Please choose one

Classes defined inside other classes are called ________ classes

       ► looped

       ► nested

       ► overloaded

       ► none of the given options.

Question No: 18      ( Marks: 1 ) - Please choose one

If we define an identifier with the statement #define PI 3.1415926 then during the execution of the program the value of PI __________

       ► can not be replace

       ► None of the given options

       ► Remain constant.

       ► can be changed by some operation 

 

Question No: 19      ( Marks: 1 ) - Please choose one 

Which value is returned by the destructor of a class?

       ► A pointer to the class.

       ► An object of the class.

       ► A status code determining whether the class was destructed correctl

       ► Destructors do not return a value.

Question No: 20      ( Marks: 1 ) - Please choose one 

Every class contains _______________.

       ► Constructor

       ► Destructor

       ► Both a constructor and a destructor

       ► None of the given options

Question No: 21      ( Marks: 1 ) - Please choose one

A template function must have

       ► One or more than one arguments

       ► Only one argument

       ► Zero argument

       ► None of the given options 

ADEEL ABBAs

Question No: 22      ( Marks: 1 ) - Please choose one 

Structured Query Language is used for ______________

       ► Databases Management

       ► Networks

       ► Writing Operating System

       ► none of the given options

Question No: 23      ( Marks: 1 ) - Please choose one 

When a call to a user-defined function finishes, the variable defined inside the function is still in existence.

       ► True

       ► False

Question No: 24      ( Marks: 1 ) - Please choose one 

The precedence of an operator can be changed through operator overloading.

       ► True

       ► False

Question No: 25      ( Marks: 1 ) - Please choose one

A Matrix can be composed of ints, floats or doubles as their elements. Best way is to handle this , _______________

       ► Write a separate class to handle each

       ► Use templates

       ► Use strings to store all types

       ► None of the given options

A Matrix can be composed of ints, floats or doubles as their elements. Instead of handling these data types separately, we can write Matrix class as a template class and write code once for all native data types.

Write Matrix class as a template class and write code once for all native data types

Question No: 26      ( Marks: 1 ) - Please choose one

"delete" operator is used to return memory to free store, which is allocated by the "new" operator.

       ► True

       ► False

Question No: 27      ( Marks: 2 )

What is the difference between switch statement and if statement.

Question No: 28      ( Marks: 2 ) 

How can we initialize data members of contained object at construction time?

Question No: 29      ( Marks: 2 ) 

How the data members of a class are initialized with meaningful values?

Question No: 30      ( Marks: 2 )

Can we overload new and delete operators?

Question No: 31      ( Marks: 3 )

What will be the output of following functions if we call these functions three times?

1)

void func1(){

int x = 0;

x++;

cout x endl;

}

2)

void func2(){

static int x = 0 ;

x++;

cout x endl ;

}   

Question No: 32      ( Marks: 3 )

 What is the keyword ‘this’ and what are the uses of ‘this’ pointer?

Question No: 33      ( Marks: 3 )

Suppose an object of class A is declared as data member of class B.

(i) The constructor of which class will be called first?

(ii) The destructor of which class will be called first?

Question No: 34      ( Marks: 5 )

Write the general syntax of a class that has one function as a friend of a class along with definition of friend function.

Question No: 35      ( Marks: 5 )

Write down the disadvantages of the templates.

 

Question No: 36      ( Marks: 5 )

Write a program which defines five variables which store the salaries of five employees, using setw and setfill manipulators to display all these salaries in a column.

Note: Display all data with in a particular width and the empty space should be filled with character x

Output should be displayed as given below:

xxxxxx1000

xxxxxx1500

xxxxx20000

xxxxx30000

xxxxx60000