SAP Written Test: Technical Aptitude; Questions and Answers with Explanations PDFs

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1. If int is 2 bytes wide.What will be the output of the program?    #include    void fun(char**);    int main()    {        char *argv[] = {"ab", "cd", "ef", "gh"};        fun(argv);        return 0;    }    void fun(char **p)    {        char *t;        t = (p+= sizeof(int))[-1];        printf("%s\n", t);    }        A.ab            B.cd            C.ef            D.gh

    Answer: B

2. What will be the output of the program if the array begins at 65486 and each integer occupies 2 bytes?    int main()    {        int arr[] = {12, 14, 15, 23, 45};        printf("%u, %u\n", arr+1, &arr+1);        return 0;    }        A.12, 65490        B.14, 65492        C.65488, 65496        D.64490, 65498

    Answer: C

    Explanation:     Here, the base address(also the address of first element) of the array is 65486. => Here, arr is reference to arr has type "pointer to int". Therefore, arr+1 is pointing to second element of the array arr memory location. Hence 65486 + 2 bytes     = 65488 => Then, &arr is "pointer to array of 5 ints". Therefore, &arr+1 denotes "5 ints * 2 bytes * 1 = 10 bytes". Hence, begining address 65486 + 10 = 65496. So, &arr+1 = 65496. Hence the output of the program is 65488, 65496.

3. Recursive functions are executed in a        A.last in first out order        B.first in First out order        C.Are maintained in a stack        D.none of the above

    Answer: A

4. What will be the output of the program?    #include    int main()    {        int i=3, j=4, k, l;        k = addmult(i, j);        l = addmult(i, j);        printf("%d %d\n", k, l);        return 0;    }    int addmult(int ii, int jj);    {        int kk, ll;        kk = ii + jj;        ll = ii * jj;        return (kk, ll);    }        A.Function addmult()return 7 and 12        B.No output        C.Error: Compile error        D.None of above

    Answer: C

    Explanation:     There is an error in this statement int addmult(int ii, int jj);. We have to remove the semi-colon, because it was an definition of the function addmult()

5. Point out the error if any in the while loop.<p> </p>    main()    {        int i =0;        while()        {            printf("%d",i++);            if(i>10)            break;        }    }        A.the condition in the while loop is a must        B.the while lop must be replaced by a for loop

    Answer: A

6. What will be the output of the program?    #include    void fun(int);    int main()    {        int a=3;        fun(a);        return 0;    }    void fun(int n)    {        if(n > 0)        {            fun(--n);            printf("%d,", n);            fun(--n);        }    }        A.0, 2, 1, 0            B.1, 1, 2, 0            C.0, 1, 0, 2            D.0, 1, 2, 0

    Answer: D

7. What will be output of following c program?<p> </p>    int main()    {        for(printf("1");!printf("0");printf("2")) printf("Sachin");        return 0;    }        A.10sachin2        B.10sachin        C.10sachin210sachin2            D.10

    Answer: D

8. What will be the output of the program?    #include    int main()    {        int fun();        int i;        i = fun();        printf("%d\n", i);        return 0;    }    int fun()    {        _AX = 1990;    }        A.Garbage value            B.0 (Zero)        C.1990            D.No output

    Answer: C

    Explanation:     The return value of the function is taken from the Accumulator _AX=1990.

9. What will be output of following c program?    void main()    {        int a[]={5,10,15};        int i=0,num;        num=a[++i]+ ++i+(++i);        printf("%d",num);    }        A.6            B.17            C.16            D.12

    Answer:A

10. What will be the output of the program?    #include    int main()    {        int i = 5;        while(i-- >= 0)        printf("%d,", i);        i = 5;        printf("\n");        while(i-- >= 0)        printf("%i,", i);        while(i-- >= 0)        printf("%d,", i);        return 0;    }

A. 4, 3, 2, 1, 0, -14, 3, 2, 1, 0, -1<p> </p>B. 5, 4, 3, 2, 1, 05, 4, 3, 2, 1, 0<p> </p>C. Error<p> </p>D. 5, 4, 3, 2, 1, 05, 4, 3, 2, 1, 05, 4, 3, 2, 1, 0        A.A            B.B            C.C            D.D

    Answer: A

11. Point out the error in the following program.    #include    int main()    {        char str[] = "Freshersworld";        printf("%.#s %2s", str, str);        return 0;    }        A.in Array declaration        B.printf statement        C.unspecified character in printf        D.No error

    Answer: D

12. Find the output of following snippet?    # include     void main()    {        char letter = 'Z';        printf("%c",letter);    }        A.Z        B.90            C.Garbage Value            D.error

    Answer: A

13. What will be the output of the program?    #include    #define SQR(x)(x*x)    int main()    {        int a, b=3;        a = SQR(b+2);        printf("%d\n", a);        return 0;    }        A.25            B.11            C.Error            D.Garbage value

    Answer: B

    Explanation:     11 Answer: 11 Explanation: a = SQR(b+2); becomes, => a = b+2 * b+2; Here SQR(x) is replaced by macro to x*x . => a = 3+2 * 3+2; => a = 3 + 6 + 2; => a = 11;

14. What will be the output of the program if value 25 given to scanf()?    #include    int main()    {        int i;        printf("%d\n", scanf("%d", &i));        return 0;    }        A.1            B.2            C.5            D.25

    Answer: A

    Explanation:     The scanf function returns the number of input is given. printf("%d\n", scanf("%d", &i)); The scanf function returns the value 1(one). Therefore, the output of the program is '1'.

15. void main()    {        char far *farther, *farthest;        printf("%d..%d",sizeof(farther),sizeof(farthest));    }<p> </p>What is the ouput of above snippet?        A.2.4            B.syntax error        C.compiler error        D.4.2

    Answer: D

16. What will be the content of 'file.c' after executing the following program?    #include    int main()    {        FILE *fp1, *fp2;        fp1=fopen("file.c", "w");        fp2=fopen("file.c", "w");        fputc('A', fp1);        fputc('B', fp2);        fclose(fp1);        fclose(fp2);        return 0;    }        A.B            B.A B            C.B B            D.Error in opening file 'file1.c'

    Answer: A

17. What is the output of following snippet?    main()    {        int c[] = { 2.8,3.4,4,6.7,5};        int j,*p=c,*q=c;        for(j=0;j        A.syntax error        B.compiler error            C.2 2 2 2 2 2 3 4 6 5        D.5 6 4 5 2 2 2 2

    Answer: C

18. What will be the output of the program ?    #include    int main()    {        float arr[] = {12.4, 2.3, 4.5, 6.7};        printf("%d\n", sizeof(arr)/sizeof(arr[0]));        return 0;    }        A.4            B.5            C.6            D.7

    Answer: A

    Explanation:     The variable arr has 4 elements. The size of the float variable is 4 bytes. Hence 4 elements x 4 bytes = 16 bytes sizeof(arr[0]) is 4 bytes Hence 16/4 is 4 bytes Hence the output of the program is '4'.

19. main()    {        char *p;        p ="Hello";        printf ("%c\n"' *&*p);    }What is the output of above snippet ?        A.H            B.syntax error        C.compiler error            D.E

    Answer: A

20. main()    {        int i;        print("%d",scanf("%d",&i));        // value 10 is given to the input here    }What is the ouput of above snippet?        A.1        B.compiler error            C.syntax error            D.2

    Answer: A

21. What will be output of following c program?     void main()    {        int a,i=4;        a=- -i+- -i+- -5;        printf("%d %d",a,i);    }        A.13 4            B.-3 2            C.7 2            D.-13 4  

    Answer: A

22. Find the output from following program?    #include    int main()    {        int a = 10, b;        a >=5 ? b=100: b=200;        printf("%d\n", b);        return 0;    }        A.100            B.200            C.Error: L value required for b        D.Garbage value

    Answer: C

    Explanation:     variable b is not assigned

23. What will be output of following c program?    void main()    {        int z;        z=(5,3,2);        printf("%d",z);    }        A.5            B.3            C.2            D.10

    Answer: C

24. What will be the output of the program?    #include    int main()    {        unsigned int i = 65535;        /* Assume 2 byte integer*/        while(i++ != 0)        printf("%d",++i);        printf("\n");        return 0;    }        A.Infinite loop        B.0 1 2 ... 65535        C.0 1 2 ... 32767 - 32766 -32765 -1 0        D.No output

    Answer: A

25. What will be output of following c program?     int main()    {        float **(*ptr)[4]=(float **(*)[4]);        ptr+=5;        printf("%d %d",ptr,sizeof ptr); return 0;    }        A.0 2            B.5 2            C.4 2            D.40 2

    Answer: D

26. What will be output of following c program?    struct myStruct    {        int a;        char b;    }    *ptr;    int main()    {        struct myStruct ms={400,'A'};        printf("%d %d",ptr->a,ptr->b);        return 0;    }        A.400 A            B.400 65            C.400 97            D.0 0

    Answer: D

27. What will be the output of the program?    #include    int main()    {        int i;        i = printf("How r u\n");        i = printf("%d", i);        printf("%d", i);        return 0;    }        A.How r u 7 2        B.How r u 8 2        C.How r u 1 1        D.Error: cannot assign printf to variable

    Answer: B

28. What will be output of following c program?    #include "string.h"    typedef struct stu1    {        int roll;        char *name;        double marks;    }    STU1;    typedef struct stu2    {        int roll;        char *name;        double marks;    }    STU2;    void main()    {        STU1 s1={25,"Rohit",87.43},*p1;        STU2 *p2; p1=&s1;        memcpy(p2,p1,4);        printf("Roll : %d\n",p2->roll);        printf("Name : %s\n",p2->name);        printf("Marks : %lf",p2->marks);    }        A.Roll : 25 Name : Rohit Marks : 87.430000        B.Roll : 25 Name : Rohit Marks : 0.000000        C.Roll : 0 Name : Rohit Marks : 87.430000        D.Roll : 0 Name : null Marks : 0.000000

    Answer: B

29. Assume integer is 2 bytes wide. How many bytes will be allocated for the following code?    #include    #include    #define MAXROW 3    #define MAXCOL 4    int main()    {        int (*p)[MAXCOL];        p = (int (*) [MAXCOL])malloc(MAXROW *sizeof(*p));        return 0;    }        A.56 bytes        B.128 bytes        C.24 bytes        D.12 bytes

    Answer: C

30. What will be output when you will execute following c code?    void main()    {        volatile int a=11;        printf("%d",a);    }        A.Garbage        B.11            C.2            D.We cannot predict

    Answer: D

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