The IIT Madras BS Programming in C (Programming in C) End Term paper sat on 28 Apr 2024, in the January 2024 term: 25 questions for 100 marks in 180 minutes. Every question is below with its answer. Take it as a timed mock test to be marked, or read it through first.
Which of the following statements about recursion in C programming is not true?
A recursive function calls itself.
Recursive functions must have a base case to prevent infinite calls.
The base case is optional for a recursive function.
Recursive functions are used to implement functions like factorial of a number.
Correct answer
The base case is optional for a recursive function.
Let a pointer variable ptr hold the address of another integer variable var. Which of the following statements will correctly print the value of var?
printf("%d", ptr);
printf("%d", *ptr);
printf("%d", ptr*);
printf("%d", &ptr);
Correct answer
printf("%d", *ptr);
Which of the following statements is not true about arrays in C?
An array stores a collection of elements of the same data type.
Array index always starts with 1.
Elements of an array are stored in contiguous memory locations.
Array name acts like a constant pointer that always points to the first element of the array.
Correct answer
Array index always starts with 1.
Which of the following statements is true about structures in C?
They can only contain variables of the same data type.
They always occupy a fixed size in memory regardless of members.
They allow grouping of variables under a single name, even with different data types.
They cannot be passed as arguments to functions.
Correct answer
They allow grouping of variables under a single name, even with different data types.
In C programming, which memory region is typically used for dynamic memory allocation?
Heap memory
Stack memory
Correct answer
Heap memory
Which function is used to write data to a file in C programming?
fwrite()
fput()
write()
put()
Correct answer
fwrite()
What does the #define directive do in C preprocessor?
Declares a variable with the value to initialize it.
Defines textual symbols which are replaced by their values before compilation.
Defines a function which may have parameters
Includes a header file.
Correct answer
Defines textual symbols which are replaced by their values before compilation.
Value of c: 200
Value of c: 170
Value of c: 0
Value of c: 180
Correct answer
Value of c: 0
main → diff→ sum → diff→ printf
main → printf → diff → diff → sum
main → printf → sum → diff→ diff
main → sum→ diff → diff→ printf
Correct answer
main → diff→ sum → diff→ printf
End Term Exam
Term
Term Exam
erm Exam
Correct answer
erm Exam
Length: 11
Size: 11
Length: 11
Size: 12
Length: 12
Size: 11
Length: 12
Size: 12
Correct answer
Length: 11
Size: 12
4
5
6
2
Correct answer
6
1
2
3
0
Correct answer
1
What will be the output of the above program?
7 5 3 3
7 7 5 3
7 5 5 3
7 7 3 3
Correct answer
7 5 5 3
a = 1, b = 2
a = 2, b = 1
a = 2, b = 1
a = 1, b = 2
a = 1, b = 1
a = 2, b = 2
a = 2, b = 2
a = 1, b = 1
Correct answer
a = 2, b = 1
a = 1, b = 2
1 2 1 3 3
1 2 2 3 3
1 2 2 3 2
1 2 3 3 2
Correct answer
1 2 1 3 3
1 2 3
2 3 4
3 4 5
1 3 5
Correct answer
2 3 4
Value of a: 0
Value of a: 1
Value of a: 2
Value of a: 3
Value of a: 1
Value of a: 2
Value of a: 3
Value of a: 4
The program will crash because the static variable “a” is not initialized.
Value of a: some_garbage_value
Value of a: some_garbage_value
Value of a: some_garbage_value
Value of a: some_garbage_value
Correct answer
Value of a: 0
Value of a: 1
Value of a: 2
Value of a: 3
epliru
xelams
expell
iarmus
Correct answer
epliru
The initialization expression is executed only once before the loop starts.
If the condition expression is evaluated false, then the loop terminates.
The loop body is always executed at least once.
The increment/decrement expression is executed after each iteration of the loop.
Correct answers
The initialization expression is executed only once before the loop starts.
If the condition expression is evaluated false, then the loop terminates.
The increment/decrement expression is executed after each iteration of the loop.
Select the correct statements from the below that dynamically allocate memory to hold 3 integer pointers. Assume size of int is 4 bytes, size of char is 1 byte and size of pointer is 8 bytes.
int* a = malloc(24);
int** a = malloc(24);
int* a = malloc(3*sizeof(int));
int** a = malloc(3*sizeof(int*));
Correct answers
int** a = malloc(24);
int** a = malloc(3*sizeof(int*));
Correct answers
Correct answer: 11
Correct answer: 5
Correct answer: 11
