LinkedIn: C (Programming) | Skill Assessment Quiz Solutions-1 | APDaga

▸ C (Programming Language) | LinkedIn Skill Assessment Quiz Solutions-1

LinkedIn: C (Programming) | Skill Assessment Quiz Solutions-1 | APDaga


Checkout other solutions for C (Programming Language):
Solution-1, Solution-2, Solution-3

  1. Which Code sample will eventually cause the computer to run out of memory ?

    • A

      while(1)
      { 
       char *smallString = (char *) malloc(10);
      }
      
    • B

      long long number = 1;
      while(1)
          number *= 2;
      
    • C

        while(1)
        {
            char hugeString[1000000L];
            memset(hugeString, 0, 1000000L);
        }
      
    • D

       while(1)
       {
           long *bigArray = (long *) malloc(sizeof(long) * 1000);
           memset(bigArray, 1000000, 1000);
           free(bigArray);
       }
      


  1. What will this code print on the screen?

    int f1 (int a, int b)
    {
        if (a > b)
        {
            printf("A is greater than B\n");
            return 1;
        }
        else
        {
            printf("B is greater than A");
            return 0;
        }
    }
    
    main()
    {
        if (f1(20,10) || f1(10,20))
            printf("C is fun!\n");
    }
    
    • A is greater then B
      C is fun!

    • A is greater then B
      B is greater then A
      C is fun!

    • A is greater then B
      B is greater then A

    • Northing is printed on Screen


  1. What is the name for calling a function inside the same function?

    • recursion
    • subfunction
    • inner call
    • infinite loop


  1. What does the declaration of variable c2 demonstrate?

    main(){
        char c1 ='a';
        char c2 = c1+10;
    }
    
    • character arithmetic
    • undefined assignment
    • type conversion
    • invalid declaration


  1. A pointer to void named vptr, has been set to point to a floating point variable named g. What is the valid way to dereference vptr to assign its pointed value to a float variable named f later in this program?

    float g;
    void *vptr=&g;
    
    • f = _(float _)vptr;
    • f = (float *)vptr;
    • f = *(float *)vptr;
    • f = *(float)vptr;




  1. What is this declaration an example of?

    struct s {
        int i;
        struct s *s1;
        struct s *s2;
    };
    
    • a node
    • a linked list
    • a stack
    • a binary tree


  1. A C header file is a file with extension .h that contains function declarations and macro definitons to be shared between several source files. Header files are listed using the preprocessing directive #include, and can have one of the following formats: #include <fileA> or #include “fileB”. What is the difference between these two formats?

    • The preprocessor will try to locate the fileA in same directory as the source file, and the fileB in a predetermined directory path.
    • The preprocessor will try to locate the fileA in the fixed system directory. It will try to locate fileB in the directory path designated by the -l option added to the command line while compiling the source code.
    • The file using fileA syntax must be system files, of unlimited number. fileB must be a user file at a maximun of one per source file.
    • The preprocessor will try to locate the fileA in a predetermined directory path. It will try to locate fileB in the same directory as the source file along with a custom directory path.


  1. Using a for loop, how could you write a C code to count down from 10 to 1 and display each number on its own line?

    • A
      for (int i = 0; i>=0, i--){
         printf("%d\n", i);
      }//end of loop
      ```
      
    • B
      int i;
      for (i=1; i<=10; i++){
          printf("%d", i);
      }
      ```
      
    • C
      int i = 10;
      while (i>0){
          printf("%d\n", i);
          i--;
      }
      ```
      
    • D
      int i;
      for (i= 10; i>0; i--){
          printf("%d\n", i);
      }// end of loop
      ```
      


  1. What is not one of the reserved words in standard C?

    • volatile
    • typeof
    • register
    • typedef


  1. What does the program shown below return?

    int main(){
        int a=1, b=2, c=3, d=4;
        int x = a;
        if (a>b)
        if (b<c) x=b;
        else x=c;
        return(x);
    }
    
    • 1
    • 3
    • 2
    • 0




  1. Using the Union declaration below, how many bytes of memory space will the data of this type occupy?

    union Cars {
        char make[20];
        char model[30];
        short year;
    } car;
    
    • 32
    • 54
    • 30
    • 52


  1. In this code sample, what is not a problem for C compiler?

    main(){
        constant int PI = 3.14;
        printf("%f\n", pi);
    }
    
    • The value of PI needs to be set to 3.141593, not 3.14
    • The declaration of PI needs to say const, not constant.
    • The data type of PI needs to be float not int.
    • The printf statement needs to use PI, not pi.


  1. Which is the smallest program to compile and run without errors?

    • main()
    • int main() {return 0;}
    • main() { }
    • main() { ; }


  1. What is optional in a function declaration?

    • data type of parameters
    • return type of function
    • parameter names
    • number of parameters


  1. C treats all devices, such as the display and the keyboard, as files. Which files opens automatically when a program executes?

    • stdout
    • stdio.h
    • default.h
    • string.h




  1. In which segment does dynamic memory allocation takes place?

    • BSS Segment
    • stack
    • heap
    • data segment


  1. Which of the following do you use to deallocate memory?

    • dalloc()
    • dealloc()
    • release()
    • free()


  1. In C language what are the basic building blocks that are constructed together to write a program?

    • keywords
    • identifiers
    • tokens
    • functions


  1. When is memory for a variable allocated?

    • during the assigment of the variable
    • during the initialization of the variable
    • during the declaration of the variable
    • during the definition of the variable


  1. By default c uses the call by value method to pass arguments to functions. How can you invoke the call by reference method?

    • by using pointers
    • by declaring functions separately from defining them
    • by using recursive functions
    • by using global variables




  1. A union allows you to store different ___ in the same ___.

    • Objects; Structure
    • Variables; Declaration
    • Data types; Memory location
    • Arrays; Header file


  1. What is the output of this program?

    main() {
        char c1='a' , c2='A';
        int i=c2-c1;
        printf("%d", i);
    }
    
    • 32
    • Runtime error
    • -32
    • 0


  1. What is the difference between scanf() and sscanf() functions?

    • The scanf() function reads data formatted as a string; The sscanf() function reads string input from the screen.
    • The scanf() function reads formatted data from the keyboard; The sscanf() function reads formatted input from a string.
    • The scanf() function reads string data from the keyboard; The sscanf() function reads string data from a string.
    • The scanf() function reads formatted data from a file; The sscanf() function reads input from a selected string


  1. What is not a valid command with this declaration?

    char *string[20] = { "one", "two", "three"};
    
    • printf("%c", string[1][2]);
    • printf("%s", string[1][2]);
    • printf("%s", string[1]);
    • printf(string[1]);


  1. What is the expression player->name equivalent to?




  1. Which program will compile and run without errors?

    • A
      main() {
          for(i=0; i<10; i++) ;
      }
      ```
      
    • B
      main() {
          int i=0;
          for(; i<10; i++) ;
      }
      ```
      
    • C
      main() {
         int i;
         for(i=0; i<j; i++) ;
      }
      ```
      
    • D
      main() {
          int i;
          for (i= 10; i<10; i++)
      }
      ```
      


  1. What does this function call return?

    1 main() { float x = f1(10, 5); }
    2 float f1(int a, int b) { return (a/b); }
    
    • 2
    • 2.000000
    • a runtime error
    • a compiler error


  1. What does this program create?

    #include <stdio.h>
    int main() {
        int *p = NULL;
        return 0;
    }
    
    • a runtime error
    • a NULL pointer
    • a compile error
    • a void pointer


  1. What is an alternative way to write the expression (*x).y?

    • There is no equivalent.
    • x->y
    • *x->y
    • y->x


  1. Compile time errors are static errors that can be found where in the code?

    • in declarations and definitions
    • in functions and expressions
    • in syntax and semantics
    • in objects and statements




  1. File input and output (I/O) in C is heavily based on the way it is done ___?

    • in Unix
    • in C++
    • in C#
    • in DOS


  1. What does the strcmp(str1, str2); function return?

    • 0 if str1 and str2 are the same, a negative number if str1 is less than str2, a positive number if str1 is greater than str2
    • true (1) if str1 and str2 are the same, false (0) if str1 and str2 are not the same
    • true (1) if str1 and str2 are the same, NULL if str1 and str2 are not the same
    • 0 if str1 and str2 are the same, a negative number if str2 is less than str1, a positive number if str2 is greater than str1


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