C Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

C Interview Questions

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Suppose we have a table name EMP as below. We want to perform a operation in which, I want to change name ‘SMITH’ from as ‘SMITH JAIN’. Also I want to change the name of the column from ENAME to E_NAME. EMPNO ENAME JOB MGR HIREDATE SAL 7369 SMITH Coder 7902 17-DEC-80 800 7499 ALLEN SALESMAN 7698 20-FEB-81 1600 7521 WARD SALESMAN 7698 22-FEB-81 1250

1966

Differentiate b/w Modify and Update commands giving example.

1 3941

What's the difference between DELETE TABLE and TRUNCATE TABLE commands?

CTC,

2 5076

‘SAVEPOINT’ and ‘ROLLBACK’ is used in oracle database to secure the data comment. Give suitable examples of each with sql command.

2345

what is the difference between getch() and getche()?

Infosys,

7 29062

who is the father of c

Infosys,

4 7360

what is pointer ? what is the use of pointer?

Infosys,

6 9208

what is the difference between call by value and call by reference?

Genpact, Global Logic, Infosys,

5 10362

#include main() { int a=1; int b=0; b=++a + ++a; printf("%d %d",a,b); }

Infosys,

7 19920

How is a two dimensional array passed to function when the order of matrix is not known at complie time?

CSC,

1 3554

How can I access a memory located at certain address?

CSC,

2 5357

How can we allocate array or structure bigger than 64kb?

CSC,

2 4790

How can I read a directory in a c program?

CSC,

1 4420

How can I increase the allowable number of simultaneously open files?

CSC,

1 4544

Famous puzzles which are generally asked by companies during interviews ?

3D PLM, Yahoo,

1 13892

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Un-Answered Questions { C }

In this problem you are to write a program that will cut some number of prime numbers from the list of prime numbers between 1 and N.Your program will read in a number N; determine the list of prime numbers between 1 and N; and print the C*2 prime numbers from the center of the list if there are an even number of prime numbers or (C*2)-1 prime numbers from the center of the list if there are an odd number of prime numbers in the list.

1854

What are the different types of C instructions?

1318

What are the restrictions of a modulus operator?

1126

What is the meaning of && in c?

1021

What is a 'null pointer assignment' error? Explain what are bus errors, memory faults, and core dumps?

1245

what is associativity explain what is the precidence for * and & , * and ++ how the folloing declaration work 1) *&p; 2) *p++;

2437

Why doesnt the call scanf work?

1195

What is dynamic variable in c?

1033

What is a good data structure to use for storing lines of text?

1086

p*=(++q)++*--p when p=q=1 while(q<=6)

1762

Why shouldn’t I start variable names with underscores?

1067

What are dangling pointers? How are dangling pointers different from memory leaks?

1318

How will you delete a node in DLL?

1294

How can I find out how much free space is available on disk?

1057

What is the process to create increment and decrement stamen in c?

1061

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