May 28, 2012

Aptitude Questions and answers with explanation

C Aptitude 11
C program is one of most popular programming language which is used for core level of coding across the board. C program is used for operating systems, embedded systems, system engineering, word processors,hard ware drivers, etc.

In this site, we have discussed various type of C programs till date and from now on, we will move further by looking at the C aptitude questions.

In the coming days, we will post C aptitude questions, answers and explanation for interview preparations.

The C aptitude questions and answers for those questions along with explanation for the interview related queries.

We hope that this questions and answers series on C program will help students and freshers who are looking for a job, and also programmers who are looking to update their aptitude on C program.
Some of the illustrated examples will be from the various companies, and IT industry experts.
Read more about C Programming Language . and read the C Programming Language (2nd Edition). by K and R.
 
Predict the output or error(s) for the following:



C aptitude 11.1
   main()
{
    int i=1;
    while (i<=5)
    {
       printf("%d",i);
       if (i>2)
              goto here;
       i++;
    }
}
fun()
{
   here:
     printf("PP");
}

Answer: Compiler error: Undefined label 'here' in function main

Explanation: Labels have functions scope, in other words The scope of the labels is limited to functions . The label 'here' is available in function fun() Hence it is not visible in function main.

C aptitude 11.2
   main()
{
   static char names[5][20]={"pascal","ada","cobol","fortran","perl"};
    int i;
    char *t;
    t=names[3];
    names[3]=names[4];
    names[4]=t; 
    for (i=0;i<=4;i++)
            printf("%s",names[i]);
}

Answer: Compiler error: Lvalue required in function main

Explanation:Array names are pointer constants. So it cannot be modified.

C aptitude 11.3
    void main()
{
            int i=5;
            printf("%d",i++ + ++i);
}

Answer: Output Cannot be predicted exactly.

Explanation: Side effects are involved in the evaluation of i

Read more Similar C Programs
Learn C Programming
C Aptitude
C Interview questions
 
You can easily select the code by double clicking on the code area above.

To get regular updates on new C programs, you can

You can discuss these programs on our Facebook Page. Start a discussion right now,

our page!

Share this program with your Facebook friends now! by liking it


(you can send this program to your friend using this button)

Like to get updates right inside your feed reader? Grab our feed!
To browse more C Programs visit this link

C Aptitude Questions and answers with explanation

C Aptitude 10
C program is one of most popular programming language which is used for core level of coding across the board. C program is used for operating systems, embedded systems, system engineering, word processors,hard ware drivers, etc.

In this site, we have discussed various type of C programs till date and from now on, we will move further by looking at the C aptitude questions.

In the coming days, we will post C aptitude questions, answers and explanation for interview preparations.

The C aptitude questions and answers for those questions along with explanation for the interview related queries.

We hope that this questions and answers series on C program will help students and freshers who are looking for a job, and also programmers who are looking to update their aptitude on C program.
Some of the illustrated examples will be from the various companies, and IT industry experts.
Read more about C Programming Language . and read the C Programming Language (2nd Edition). by K and R.
Predict the output or error(s) for the following:


C aptitude 10.1
  void main()
{
 char far *farther,*farthest;
  
 printf("%d..%d",sizeof(farther),sizeof(farthest));
   
 }

Answer: 4..2

Explanation: the second pointer is of char type and not a far pointer

C aptitude 10.2
    main()
{
 int i=400,j=300;
 printf("%d..%d");
}

Answer: 400..300

Explanation:printf takes the values of the first two assignments of the program. Any number of printf's may be given. All of them take only the first two values. If more number of assignments given in the program, then printf will take garbage values.

C aptitude 10.3
    main()
{
 char *p;
 p="Hello";
 printf("%c\n",*&*p);
}
Answer: H

Explanation: * is a dereference operator & is a reference operator. They can be applied any number of times provided it is meaningful. Here p points to the first character in the string "Hello". *p dereferences it and so its value is H. Again & references it to an address and * dereferences it to the value H.

Read more Similar C Programs
Learn C Programming
C Aptitude
C Interview questions
 
You can easily select the code by double clicking on the code area above.

To get regular updates on new C programs, you can

You can discuss these programs on our Facebook Page. Start a discussion right now,

our page!

Share this program with your Facebook friends now! by liking it


(you can send this program to your friend using this button)

Like to get updates right inside your feed reader? Grab our feed!






To browse more C Programs visit this link

C Aptitude Questions and answers with explanation

C Aptitude 9
C program is one of most popular programming language which is used for core level of coding across the board. C program is used for operating systems, embedded systems, system engineering, word processors,hard ware drivers, etc.

In this site, we have discussed various type of C programs till date and from now on, we will move further by looking at the C aptitude questions.

In the coming days, we will post C aptitude questions, answers and explanation for interview preparations.

The C aptitude questions and answers for those questions along with explanation for the interview related queries.

We hope that this questions and answers series on C program will help students and freshers who are looking for a job, and also programmers who are looking to update their aptitude on C program.
Some of the illustrated examples will be from the various companies, and IT industry experts.
Read more about C Programming Language . and read the C Programming Language (2nd Edition). by K and R.
Predict the output or error(s) for the following:


C aptitude 9.1
  main()
{
printf("%p",main);
}


Answer: Some address will be printed.

Explanation: Function names are just addresses (just like array names are addresses). main() is also a function. So the address of function main will be printed. %p in printf specifies that the argument is an address. They are printed as hexadecimal numbers.

C aptitude 9.2
 main()
{
clrscr();
}
clrscr();

Answer: No output/error

Explanation: The first clrscr() occurs inside a function. So it becomes a function call. In the second clrscr(); is a function declaration (because it is not inside any function).

C aptitude 9.3
   enum colors {BLACK,BLUE,GREEN}
 main()
{
  
 printf("%d..%d..%d",BLACK,BLUE,GREEN);
   
 return(1);
}
Answer: 0..1..2

Explanation: enum assigns numbers starting from 0, if not explicitly defined.


Read more Similar C Programs
Learn C Programming
C Aptitude
C Interview questions
 
You can easily select the code by double clicking on the code area above.

To get regular updates on new C programs, you can

You can discuss these programs on our Facebook Page. Start a discussion right now,

our page!

Share this program with your Facebook friends now! by liking it


(you can send this program to your friend using this button)

Like to get updates right inside your feed reader? Grab our feed!






To browse more C Programs visit this link