Mastering C Programming Concepts

What is the syntax for a basic for loop in C?

• for(initialization: condition: increment) { // code }

• for(initialization; increment; condition) { // code }

• for(initialization; condition; increment) { // code }

• for(condition; initialization; increment) { // code }

Write a simple while loop that prints numbers from 1 to 5.

• i = 1 while i <= 5: print(i) i += 1

• for i in range(1, 6): print(i)

• i = 0 while i < 5: print(i) i += 1

• i = 1 while i < 5: print(i) i += 1

How do you use an if-else statement to check if a number is positive or negative?

• Use an if-else statement to compare the number to zero.

• Use a loop to iterate through the number.

• Check if the number is greater than one.

• Use a switch statement to check the number.

Explain the purpose of nested if conditions with an example.

• To determine if a student should retake the exam based on their attendance.

• For example, in a grading system, if a student's score is above 60 (outer if), then check if the score is above 80 (inner if) to determine if they receive a distinction.

• To check if a student's score is below 50 for a passing grade.

• To calculate the average score of all students in the class.

What is the syntax of a switch case statement in C?

• switch(expression) { case constant1: // statements; case constant2: // statements; }

• switch { case constant1: // statements break; case constant2: // statements break; }

• switch(expression) { case constant1: // statements break; case constant2: // statements break; default: // statements }

• switch(expression) { case constant1: // statements; default: // statements; }

How can you use pointers to access members of a structure?

• Use the dot operator (.) with a pointer to access structure members.

• Access structure members directly without using pointers.

• Use the asterisk operator (*) to dereference and access structure members.

• Use the arrow operator (->) with a pointer to access structure members.

What is a pointer in C and how is it declared?

• A pointer in C is declared with 'pointerName : type;'

• A pointer in C is a variable that holds a string value.

• A pointer in C is declared using the syntax 'type *pointerName;', for example, 'int *ptr;'

• A pointer in C is declared using 'type pointerName;'

Define a structure in C to represent a student with name and age.

• struct Student { char name[100]; short age; };

• struct Student { char name[50]; float age; };

• struct Student { char name[100]; int age; };

• struct Student { int age; char name[100]; };

What is the difference between a structure and a union in C?

• A structure uses less memory than a union because it can store only one type of data.

• A structure can only store one value at a time, while a union can store multiple values of different types simultaneously.

• A structure can store multiple values of different types simultaneously, while a union can store only one value at a time, sharing the same memory space.

• Structures and unions are the same and can be used interchangeably in C.

What is operator precedence and why is it important in C?

• Operator precedence is the same as operator overloading in C.

• Operator precedence is the set of rules that defines the order in which operators are evaluated in C expressions, and it is important to ensure correct evaluation of expressions.

• Operator precedence is irrelevant in C programming.

• Operator precedence determines the speed of program execution in C.