Explore topic-wise MCQs in C Programming.

This section includes 191 Mcqs, each offering curated multiple-choice questions to sharpen your C Programming knowledge and support exam preparation. Choose a topic below to get started.

101.

Which operator from the following has the lowest priority?

A. Assignment operator
B. Division operator
C. Comma operator
D. Conditional operator
Answer» D. Conditional operator
Discussion
102.

Which type conversion is NOT accepted?

A. From char to int
B. From float to char pointer
C. From negative int to char
D. From double to char
Answer» C. From negative int to char
Discussion
103.

What is the output of the below code considering size of short int is 2, char is 1 and int is 4 bytes?

A. 2, 1, 2
B. 2, 1, 1
C. 2, 1, 4
D. 2, 2, 8
Answer» D. 2, 2, 8
Discussion
104.

Function tolower(c) defined in library works for

A. Ascii character set
B. Unicode character set
C. Ascii and utf-8 but not EBSIDIC character set
D. Any character set
Answer» E.
Discussion
105.

What is the difference between the following 2 codes?

A. No difference as space doesn’t make any difference, values of a, b, d are same in both the case
B. Space does make a difference, values of a, b, d are different
C. Program 1 has syntax error, program 2 is not
D. Program 2 has syntax error, program 1 is not
Answer» E.
Discussion
106.

Which of the following is not a logical operator?

A. !
B. &&
C. ||
D. |
Answer» E.
Discussion
107.

Which function in the following expression will be called first?a = func3(6) - func2(4, 5) / func1(1, 2, 3);

A. func1();
B. func2();
C. func3();
D. Cannot be predicted
Answer» E.
Discussion
108.

If a is an unsigned integer variable whose value is hx6db7, what is the value of -a?

A. h llhhhhl
B. hxhhl
C. hx248
D. hx9248
Answer» E.
Discussion
109.

Which of the following is correct about err used in the declaration given below? typedef enum error { warning, test, exception } err;

A. It is a typedef for enum error.
B. It is a variable of type enum error.
C. The statement is erroneous.
D. It is a structure.
Answer» B. It is a variable of type enum error.
Discussion
110.

Identify which of the following are declarations1 :extern int x;2 :float square ( float x ) { ... }3 :double pow(double, double);

A. 1
B. 2
C. 1 and 3
D. 3
Answer» D. 3
Discussion
111.

Literal means

A. a string
B. a string constant
C. a character
D. an alphabet
Answer» C. a character
Discussion
112.

int i = 5; is a statement in a C program.

A. during execution, value of i may change but not its address
B. during execution both the address and value may change
C. repeated execution may result in different addresses for i
D. i may not have an associated address
Answer» D. i may not have an associated address
Discussion
113.

What will be the data type of the result of the following operation?(float)a * (int)b / (long)c * (double)d

A. int
B. long
C. float
D. double
Answer» E.
Discussion
114.

Which operators of the following have same precedence?P. "!=", Q. "+=", R. "<<="

A. P and Q
B. Q and R
C. P and R
D. P, Q and R
Answer» C. P and R
Discussion
115.

Which of the following correctly shows the hierarchy of arithmetic operations in C?

A. / + * -
B. * - / +
C. + - / *
D. / * + -
Answer» E.
Discussion
116.

Declare the following statement?"A pointer to a function which receives an int pointer and returns float pointer".

A. float *(ptr)*int;
B. float *(*ptr)(int)
C. float *(*ptr)(int*)
D. float (*ptr)(int)
Answer» D. float (*ptr)(int)
Discussion
117.

Which of the following option is the correct representation of the following C statement?

A. e = (a * (b +(c /(d * f))));
B. e = ((a * b) + (c / (d * f)));
C. e = ((a * b) + ((c / d)* f));
D. Both b and c
Answer» E.
Discussion
118.

What will be output for the following code?

A. 3 4
B. 4 4
C. 3 5
D. 2 4
Answer» B. 4 4
Discussion
119.

Which of the following operator has lowest Precedence?

A. ||
B. ,
C. ?:
D.
Answer» C. ?:
Discussion
120.

Which of the following is correct Associativity for == operator?

A. Left to right
B. Right to left
C. Left to left
D. Right to right
Answer» B. Right to left
Discussion
121.

Which of the following operator has highest Precedence?

A. *
B. /
C. ~
D. []
Answer» E.
Discussion
122.

If the declaration unsigned c:5; is replaced byunsigned : 6; then

A. it results in a syntax error
B. it is meaningless
C. compiler will give a new name for the field
D. none of these
Answer» D. none of these
Discussion
123.

In an expression involving || operator, evaluationI. Will be stopped if one of its components evaluates to falseII. Will be stopped if one of its components evaluates to trueIII. Takes place from right to leftIV. Takes place from left to right

A. I and II
B. I and III
C. II and III
D. II and IV
Answer» E.
Discussion
124.

In order to create a local variable we need to use local keyword. local int var;

A. True
B. False
C. Optional
D. None of the above
Answer» C. Optional
Discussion
125.

Pick the operators that assosiate from left to right

A. &&
B. ?:
C. ,
D. All of the above
Answer» E.
Discussion
126.

Pick the operators whose meaning is context dependent

A. *
B. #
C. &
D. All of the above
Answer» E.
Discussion
127.

Operation “a = a * b + a” can also be written as:

A. a *= b + 1;
B. (c = a * b)!=(a = c + a);
C. a = (b + 1)* a;
D. All of the mentioned
Answer» E.
Discussion
128.

Comment on the following statement? n = 1; printf("%d, %dn", 3*n, n++);

A. Output will be 3, 2
B. Output will be 3, 1
C. Output will be 6, 1
D. Output is compiler dependent
Answer» E.
Discussion
129.

In an operation involving || operator, evaluation

A. takes place from left to right
B. will be stopped if one of its components evaluates to true
C. takes place from right to left
D. both (a) and (b)
Answer» E.
Discussion
130.

For initialization a = 2, c = 1 the value of a and c after this code will be c = (c) ? a = 0 : 2;

A. a = 0, c = 0;
B. a = 2, c = 2;
C. a = 2, c = 2;
D. a = 1, c = 2;
Answer» B. a = 2, c = 2;
Discussion
131.

for c = 2, value of c after c <<= 1;

A. c = 1;
B. c = 2;
C. c = 3;
D. c = 4;
Answer» E.
Discussion
132.

The declaration enum cities{ bethlehem, jericho, nazareth = 1, jerusalem } assigns the value 1 to

A. bethlehem
B. nazareth
C. bethIehem and nazareth
D. jericho and nazareth
Answer» E.
Discussion
133.

What is the value of the below assignment expression (x = foo())!= 1 considering foo() returns 2

A. 2
B. True
C. 1
D. 0
Answer» B. True
Discussion
134.

Consider the statements: putchar ( getchar ( )); putchar(getchar( ));If a b is the input, the output will be

A. an error message
B. this can't be the input
C. ab
D. a   b
Answer» C. ab
Discussion
135.

Pick the operators that assosiate from the right

A. ?:
B. +=
C.
D. All of the above
Answer» E.
Discussion
136.

A static variable

A. cannot be initialized
B. is initialized once at the commencement of execution and cannot be changed at run time
C. retains its value throughout the file of the program
D. is same as an automatic variable but is placed at the head of a program
Answer» D. is same as an automatic variable but is placed at the head of a program
Discussion
137.

If integer needs two bytes of storage, then maximum value of a signed integer is

A. 2^16 - 1
B. 2^15-1
C. 2^16
D. 2^15
Answer» C. 2^16
Discussion
138.

Which of the following comments about wide characters is/are true ?

A. it is binary representation of a character in the extended binary set
B. it is of integer type wchar_t
C. end of file is represented by WEOF
D. All of the above
Answer» E.
Discussion
139.

The expression 5 - 2 - 3 * 5 - 2 will evaluate to 18, if - is left associative and

A. * has precedence over *
B. * has precedence over -
C. - has precedence over *
D. - has precedence over -
Answer» D. - has precedence over -
Discussion
140.

What do the following declaration signify?char **argv;

A. argv is a pointer to pointer.
B. argv is a pointer to a char pointer.
C. argv is a function pointer.
D. argv is a member of function pointer.
Answer» C. argv is a function pointer.
Discussion
141.

In a 'C'expression involving || operator, evaluation

A. Will be stopped if one of its components evaluates to false
B. Will be stopped if one of its components evaluates to true
C. Takes place from right to left
D. None of these
Answer» C. Takes place from right to left
Discussion
142.

Which of the following are unary operators in C?1. !2. sizeof3. ~4. &&

A. 1, 2
B. 1, 3
C. 2, 4
D. 1, 2, 3
Answer» E.
Discussion
143.

Which of the structure is incorrcet?1 :struct aa{ int a; float b;};2 :struct aa{ int a; float b; struct aa var;};3 :struct aa{ int a; float b; struct aa *var;};

A. 1
B. 2
C. 3
D. 1, 2, 3
Answer» C. 3
Discussion
144.

Which of the following is correct use of Conditional Operator ?

A. a>b ? c=10;
B. max = a>b ? a>c?a:c:b>c?b:c
C. a>b ? c=50 : c=140;
D. a>b : c=10;
Answer» C. a>b ? c=50 : c=140;
Discussion
145.

Which of the structure is correct?1 :struct book{ char name[10]; float price; int pages;};2 :struct aa{ char name[10]; float price; int pages;}3 :struct aa{ char name[10]; float price; int pages;}

A. 1
B. 2
C. 3
D. All of above
Answer» B. 2
Discussion
146.

What do the following declaration signify?char *arr[10];

A. arr is a array of 10 character pointers.
B. arr is a array of function pointer.
C. arr is a array of characters.
D. arr is a pointer to array of characters.
Answer» B. arr is a array of function pointer.
Discussion
147.

Declare the following statement?"A pointer to a function which receives nothing and returns nothing".

A. void *(ptr)*int;
B. void *(*ptr)()
C. void *(*ptr)(*)
D. void (*ptr)()
Answer» E.
Discussion
148.

How would you round off a value from 6.66 to 7.0?

A. ceil(6.66)
B. floor(6.66)
C. roundup(6.66)
D. roundto(6.66)
Answer» B. floor(6.66)
Discussion
149.

How many keywords are there in c ?

A. 31
B. 32
C. 64
D. 63
Answer» C. 64
Discussion
150.

The statement   int **a;

A. is illegal
B. is legal but meaningless
C. is syntactically and semantically correct
D. none of these
Answer» D. none of these
Discussion