Operators And Expressions — Part 2 MCQs with Explanations

Since the second condition is false so, further conditions will not be checked, it will be skipped.

For any comma separated expression the outcome is the right most part.

C Operator Precedence Table

As the first condition ( w < x) is false and the logical operator && is used, the entire relation becomes false and the second part ( y = z++) is not executed.

As the expression is evaluated from right to left.

Step 1: Initialize a with the value 10. Step 2: Declare b without initialization (the initial value is undefined). Step 3: Evaluate a++ (post-increment): - The current value of a is 10. - After evaluating a++ , a becomes 11. Step 4: Evaluate ++a (pre-increment): - ++a increments a to 12 and returns the updated value, which is 12. Step 5: Sum the values obtained in steps 3 and 4: 10 + 12 equals 22. Step 6: Assign the sum (22) to b . Step 7: The printf function follows the stack Last-In-First-Out (LIFO) concept, which means that the expressions are evaluated from right to left. Step 8: The first expression to be evaluated is ++a : - ++a increments a to 13 and returns the updated value, which is 13. Step 9: The next expression to be evaluated is a++ : - a++ returns the current value of a (13) and then increments a to 14. - The returned value is 13. Step 10: Finally, the last expression to be evaluated is a , which has the current value of 14. Therefore, the output of the program will be: 22 13 14 14 This output corresponds to the value of b , followed by the evaluated values of a++ , a , and ++a , respectively, in the printf statement.

In C, a float can represent both whole numbers and decimal numbers due to its ability to store values in floating-point format. Option A: 3.666666 is a valid float representation with precision. Option B: 3.666 is also a valid float value, just with fewer decimal places. Option C: 3 is an integer, but it can still be represented as a float (e.g., 3.0). Therefore, all the options listed are valid float outputs depending on how the float is stored or printed. Hence, the correct answer is Option D: None of the mentioned .

sizeof is a compile-time operator in C that determines the size, in bytes, of a variable or data type. Option A: pointers – Valid. sizeof can be used with pointers to determine the size of the pointer type. Option B: functions – Invalid. You cannot use sizeof on functions because functions do not have a defined size at compile time. sizeof requires a complete type, and functions are not complete objects in C. Option C: macro definition – Valid. If the macro expands to a valid expression or type, sizeof can be used on it. Option D: none of the mentioned – Incorrect because functions cannot be used with sizeof . Therefore, the correct answer is Option B: functions.

Arithmetic operators is the correct answer to “In C programming language, which of the following type of operators have the highest precedence”. This question is standard in competitive examination syllabi for Operators And Expressions.

All of the above is the correct answer to “Which of the following comments about the ++ operator are correct”. This question is standard in competitive examination syllabi for Operators And Expressions.

3 8 is the correct answer to “Determine output of the following program code. #include<stdio.h> void main() { int a, b=7; a = b<4 ? b<<1 : ++b>4 ? 7>>1 : a; printf("%d %d", a, b); }”. This question is standard in competitive examination syllabi for Operators And Expressions.

a = 4, c = 8 is the correct answer to “Consider the following program fragment, and choose the correct one. void main() { int a, b = 2, c; a = 2 * (b++); c = 2 * (++b); }”. This question is standard in competitive examination syllabi for Operators And Expressions.

sizeof(struct stemp*) = sizeof(union utemp*) = sizeof(char *) is the correct answer to “Which among the following statement is right”. This question is standard in competitive examination syllabi for Operators And Expressions.

2.455555 is the correct answer to “What will be the output of the following C code? #include <stdio.h> int main() { float a = 2.455555555555; printf("%f", a); }”. This question is standard in competitive examination syllabi for Operators And Expressions.

2 % 4f is the correct answer to “Which of the following % operation is invalid”. This question is standard in competitive examination syllabi for Operators And Expressions.

both int and float is the correct answer to “In the following C code, the union size is decided by? union temp { char a; int b; float c; };”. This question is standard in competitive examination syllabi for Operators And Expressions.

fmod(a, b) is the correct answer to “Modulus for float could be achieved by”. This question is standard in competitive examination syllabi for Operators And Expressions.

sizeof() is the correct answer to “Which among the following has the highest precedence”. This question is standard in competitive examination syllabi for Operators And Expressions.

Floating type is the correct answer to “%f access specifier is used for . . . . . . . .”. This question is standard in competitive examination syllabi for Operators And Expressions.

4 is the correct answer to “What will be the output of the following C code? #include <stdio.h> printf("%d", sizeof('a'));”. This question is standard in competitive examination syllabi for Operators And Expressions.

float to int is the correct answer to “Loss in precision occurs for typecasting from. . . . . . . .”. This question is standard in competitive examination syllabi for Operators And Expressions.

4 is the correct answer to “What will be the output of the following C code? #include <stdio.h> union temp { char a; char b; int c; }t; int main() { printf("%d", sizeof(t)); return 0; }”. This question is standard in competitive examination syllabi for Operators And Expressions.

float is the correct answer to “Select the odd one out with respect to type”. This question is standard in competitive examination syllabi for Operators And Expressions.

double is the correct answer to “Predict the data type of the following mathematical operation? 2 * 9 + 3 / 2 . 0”. This question is standard in competitive examination syllabi for Operators And Expressions.

6 is the correct answer to “How many digits are present after the decimal in float value”. This question is standard in competitive examination syllabi for Operators And Expressions.

4 is the correct answer to “What is the size of float in a 32-bit compiler”. This question is standard in competitive examination syllabi for Operators And Expressions.

sizeof(a) is the correct answer to “Size of an array can be evaluated by . . . . . . . . (Assuming array declaration int a[10];)”. This question is standard in competitive examination syllabi for Operators And Expressions.

unsigned int is the correct answer to “What type of value does sizeof return”. This question is standard in competitive examination syllabi for Operators And Expressions.

none of the mentioned is the correct answer to “Which among the following is never possible in C when members are different in a structure and union? //Let P be a structure //Let Q be a union”. This question is standard in competitive examination syllabi for Operators And Expressions.

44 is the correct answer to “What will be the size of the following C structure? #include <stdio.h> struct temp { int a[10]; char p; };”. This question is standard in competitive examination syllabi for Operators And Expressions.

1 is the correct answer to “What is the sizeof(void) in a 32-bit C”. This question is standard in competitive examination syllabi for Operators And Expressions.

double is the correct answer to “Which data type is suitable for storing a number like? 10.0000000001”. This question is standard in competitive examination syllabi for Operators And Expressions.

int and float is the correct answer to “In a 32-bit compiler, which 2 types have the same size”. This question is standard in competitive examination syllabi for Operators And Expressions.

Output, 4 is the correct answer to “What will be the output of the following C code? #include <stdio.h> printf("%d", sizeof(strlen("HELLOWORLD")));”. This question is standard in competitive examination syllabi for Operators And Expressions.

3 is the correct answer to “What will be the output of the following C code? #include <stdio.h> printf("%.0f", 2.89);”. This question is standard in competitive examination syllabi for Operators And Expressions.

1 Byte is the correct answer to “What is the sizeof(char) in a 32-bit C compiler”. This question is standard in competitive examination syllabi for Operators And Expressions.

Output is 8 is the correct answer to “What will be the output of the following C code? #include <stdio.h> (sizeof double = 8, float = 4, void = 1) #define PI 3.14 int main() { printf("%d", sizeof(PI)); }”. This question is standard in competitive examination syllabi for Operators And Expressions.

size of a is 4, value of a is 1 is the correct answer to “What will be the output of the following C code? #include <stdio.h> main() { int a = 1; printf("size of a is %d, ", sizeof(++a)); printf("value of a is %d", a); };”. This question is standard in competitive examination syllabi for Operators And Expressions.

None of the mentioned is the correct answer to “Which of the following is not an operator in C”. This question is standard in competitive examination syllabi for Operators And Expressions.

double is the correct answer to “%lf is used to display”. This question is standard in competitive examination syllabi for Operators And Expressions.