Mastering C Programming Constructs

What is the purpose of an if-else statement in C?

• To create loops for repeated execution.

• To define a variable in C programming.

• To control the flow of execution based on a condition.

• To declare functions in a program.

How do you write a while loop in C?

• repeat(condition) { /* code to be executed */ }

• while(condition) { /* code to be executed */ }

• do { /* code to be executed */ } while(condition);

• for(condition) { /* code to be executed */ }

What is the difference between a while loop and a do-while loop?

• A while loop executes first and checks the condition later; a do-while loop checks the condition before execution.

• A while loop can only run once; a do-while loop can run multiple times regardless of the condition.

• A while loop is used for infinite loops; a do-while loop is used for conditional loops.

• A while loop checks the condition before execution; a do-while loop executes at least once before checking the condition.

Can you explain how nested loops work in C?

• Nested loops allow for iterating over multi-dimensional structures, executing the inner loop for each iteration of the outer loop.

• Nested loops can only be used with one-dimensional data structures.

• Nested loops execute the outer loop only once for all iterations.

• Nested loops are used to create single-dimensional arrays in C.

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

• switch(value) { case expression: // code block; break; }

• switch(expression) { case value1: // code block; break; case value2: // code block; break; default: // code block; }

• case value: switch(expression) { // code block; }

• switch { case value1: // code block; } default: // code block;

How do you use break and continue in loops?

• 'break' ends the program; 'continue' stops the function.

• 'break' skips to the next iteration; 'continue' exits the loop.

• 'break' exits the loop; 'continue' skips to the next iteration.

• 'break' pauses the loop; 'continue' restarts the loop.

What will be the output of the following code: if (x > 10) { printf('Greater'); } else { printf('Lesser'); }?

• Lesser

• Larger

• Equal

• Smaller

How many times will a while loop execute if the condition is false at the start?

• Infinite

• 0

• 2

• 1

What is the main advantage of using a do-while loop?

• It allows for infinite loop execution without conditions.

• The loop body can be skipped entirely if conditions are met.

• It is more efficient than a standard for loop in all cases.

• The main advantage of using a do-while loop is that it ensures the loop body executes at least once.

How can you implement a nested if-else statement?

• if (condition1) { if (condition2) { // code for condition1 and condition2 } else { // code for condition1 and not condition2 } } else { // code for not condition1 }

• if (condition1) { // code for condition1 } else if (condition2) { // code for condition2 }

• if (condition1) { if (condition2) { // code for condition2 } }

• if (condition1) { // code for condition1 } else { // code for condition2 }