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1000+ C Programming MCQ for UPSC CSE [Solved]

Thursday 9th of March 2023

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1. Which of the following is the most preferred way of throwing and handling exceptions?
A. Throw by value and catch by reference.
B. Throw by reference and catch by reference.
C. Throw by value and catch by value
D. Throw the pointer value and provide catch for teh pointer type.
Answer : B
2. What will be output if you will compile and execute the following c code? 
#include 
int main(){    
int i=320;    
char *ptr=(char *)&i;    
printf("%d",*ptr);     
return 0; 
}

A. 1
B. 64
C. 320
D. Compiler Error
Answer : B
3. The output of the following code is: 
main() 
{ 
int sub[50]; 
for(i=0; i<=48;i++) 
{ 
sub[i]=i; 
printf("
%d", sub[i]);
}
}
A. 0 to 48 will be displayed
B. 48
C. 49
D. Compilation Error
Answer : D
4. ------ is the ternary operator
A. ?,-
B. ?,:
C. ++<--
D. none of the above
Answer : B
5. The output of the following code is: 
void main()
{ 
int a = 20;
printf("%d\t%d
", ++a, a);
}
A. 21 21
B. 20 21
C. 21 20
D. 20 20
Answer : C
6. The output of the following code is: 
void main() 
{ 
static int a = 1, b, c;
if (a>=2) b=2; c=3;
printf("%d\t%d", b,c); 
}
A. 2 3
B. 0 3
C. 0 0
D. 2 0
Answer : B
7. && and & operators have the same meaning.
A. True
B. False
C.
D.
Answer : B
8. Which among the following is a unconditional control structure
A. do-while
B. if-else
C. goto
D. for
Answer : C
9. When is std::bad_alloc exception thrown?
A. When new operator cannot allocate memory
B. When alloc function fails
C. When type requested for new operation is considered bad<  thisexception is thrown
D. When delete operator cannot delete teh allocated (corrupted) object
Answer : D
10. It is necessary to initialize the array at the time of declaration.
A. True
B. False
C.
D.
Answer : B
11. void' is a datatype.
A. True
B. False
C.
D.
Answer : A
12. = and = = have the same operation.
A. True
B. False
C.
D.
Answer : B
13. The printf() function retunes which value when an error occurs?
A. Positive value
B. Zero
C. Negative value
D. None of these
Answer : C
14. The expression 'int j = 6 + 3 % -9;' evaluates to -1.
A. True
B. False
C.
D.
Answer : B
15. What is an array?
A. An array is a collection of variables that are of the dissimilar data type.
B. An array is a collection of variables that are of the same data type.
C. An array is not a collection of variables that are of the same data type.
D. None of the above.
Answer : B
16. # define PI = 8;' is the correct declaration of macros.
A. True
B. False
C.
D.
Answer : B
17.

What will be output if you will compile and execute the following c code?


#include 
#define x 5+2 
int main(){     
int i;     
i=x*x*x;     
printf("%d",i);      
return 0;  
}



A. 27
B. 343
C. 233
D. Compiler Error
Answer : A
18. fprintf()function can be used to write into console.
A. True
B. False
C.
D.
Answer : B
19. The expression "int i = j = k = 0;" is invalid.
A. True
B. False
C.
D.
Answer : A
20. The-------------------- statement helps immediate exit from any part of the loop
A. break
B. continue
C. exit
D. All of the above
Answer : A
21. Which of the following is a valid destructor of the class name "Country"
A. int ~Country()
B. void Country()
C. int ~Country(Country obj)
D. void ~Country()
Answer : B
22. Nested macros are allowed.
A. True
B. False
C.
D.
Answer : B
23. Bitwise operators can operate upon?
A. double and chars
B. floats and doubles
C. ints and floats
D. ints and chars
Answer : D
24. The output of the following code is: 
main() 
{
int a = 5, b = 6; 
(a == b? printf("%d", a)); 
}
A. 0
B. 5
C. Error
D. None of the above
Answer : C
25. Which classes allow primitive types to be accessed as objects?
A. Storage
B. Virtual
C. Friend
D. Wrapper
Answer : B
26. Single operations involving entire arrays are permitted in C.
A. True
B. False
C.
D.
Answer : A
27. There are total ------ numbers of operators in 'C'.
A. 35
B. 45
C. 55
D. 40
Answer : B
28. Which of the following shows the correct hierarchy of arithmetic operations in C
A. / + * ?
B. * ? / +
C. + ? / *
D. * / + -
Answer : D
29. A recursive function calls itself again and again.
A. True
B. False
C.
D.
Answer : A
30. If 'str' is a string of 7 characters, the statement printf("%4s", str); will display ------characters.
A. 4
B. 7
C. 6
D. 0
Answer : A
31. Structures within structures cannot be created.
A. True
B. False
C.
D.
Answer : B
32. How many times the following loop will execute?
for (a = 0; a < 4; a++)
printf("hello
");
A. 3
B. 4
C. 5
D. infinite
Answer : B
33. continue statement is used
A. to go to the next iteration in a loop
B. come out of a loop
C. exit and return to the main function
D. restarts iterations from beginning of loop
Answer : D
34. The output of the following code is: 
void main() 
{
float a;
int x = 10, y = 3; a = x / y;
printf("%f", a); }
A. 3.999999
B. Error
C. 3
D. 3.000000
Answer : D
35. C is a ___ language
A. High Level and Procedural
B. Low Level and OOPS
C. Middle Level and Procedural
D. Machine Level and OOPS
Answer : A
36. enum helps to create user defined datatype.
A. True
B. False
C.
D.
Answer : A
37. Which options shows the correct hierarchy of arithmetic operators
A. **, * or /, + or -
B. **, *, /, +, -
C. **< /< *< +<-
D. / or *, - or +
Answer : D
38. Character data types cannot be declared as unsigned.
A. True
B. False
C.
D.
Answer : B
39. /* The C language.
/* is a procedural language .*/*/
The above statement is valid.
A. True
B. False
C.
D.
Answer : B
40. Which of the following is invalid?
A. ''
B. " "
C. 'a'
D. abc'
Answer : D
41. do-while loop is useful when we want the statements within the loop must be executed
A. Only once
B. At least once
C. More than Once
D. Any one of the above
Answer : B
42. Which of the following is not true about preprocessor directives
A. They begin with a hash symbol
B. They are processed by a preprocessor
C. They form an integral part of the code
D. They have to end with a semi colon
Answer : A
43. An array elements are always stored in _________ memory locations.
A. Sequential
B. Random
C. Sequential and Random
D. None of the above
Answer : A
44. What's wrong? for (int k = 2, k <=12, k++)
A. the increment should always be ++k
B. the variable must always be the letter i when using a for loop
C. there should be a semicolon at the end of the statement
D. the commas should be semicolons
Answer : B
45. Only one break can be used in one loop.
A. True
B. False
C.
D.
Answer : B
46. Operation between an integer and float always yields a float result.
A. True
B. False
C.
D.
Answer : A
47. Which of the following is not recommended in a header file?
A. Type definitions (typedefs)
B. Class definitions
C. Function definitions
D. Template definitions
Answer : D
48. What's wrong? while( (i < 10) && (i > 24))
A. the logical operator && cannot be used in a test condition
B. the while loop is an exit-condition loop
C. the test condition is always true
D. the test condition is always false
Answer : D
49. static variable will not always have assigned value.
A. True
B. False
C.
D.
Answer : A
50. Which of the following is not an infinite loop
A. int i =1;
while (1)
{i++;}
B. for( ; ; );
C. int true=0< false;
while (true)
{false = 1;}
D. int y, x = 0;
do
{y = x;}
while (x==0);
Answer : C
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