While structure in C

Pregunta 1

What is the while loop used for in C?

Opcion A To run a block of code only once Opcion B To repeat a block of code while a condition is true Opcion C To declare variables Opcion D To print data

Pregunta 2

What does this program print?

Snippet c

int i = 1;

while(i <= 3){
    printf("%d ", i);
    i++;
}

Opcion A 1 2 3 Opcion B 1 2 Opcion C 2 3 Opcion D 1 1 1

Pregunta 3

What happens if the while condition is always true?

Opcion A The program ends normally Opcion B An infinite loop is produced Opcion C It runs only once Opcion D The compiler fixes it

Pregunta 4

What does this code print?

Snippet c

int i = 0;

while(i < 3){
    printf("%d ", i);
    i++;
}

Opcion A 0 1 2 Opcion B 1 2 3 Opcion C 0 1 2 3 Opcion D 1 2

Pregunta 5

Which is the correct syntax for a while loop?

Opcion A while i < 5 { } Opcion B while(i < 5) { } Opcion C while i < 5 then Opcion D while [i < 5]

Pregunta 6

What does this code print?

Snippet c

int i = 5;

while(i > 0){
    printf("%d ", i);
    i--;
}

Opcion A 1 2 3 4 5 Opcion B 5 4 3 2 1 Opcion C 5 4 3 Opcion D 0 1 2 3 4

Pregunta 7

Which part of the while loop controls how many times it repeats?

Opcion A printf Opcion B The condition Opcion C The compiler Opcion D The braces

Pregunta 8

What does this program print?

Snippet c

int i = 1;

while(i <= 5){
    printf("Hi ");
    i++;
}

Opcion A Hi Hi Hi Hi Hi Opcion B Hi Opcion C Hi Hi Opcion D Hi Hi Hi

Pregunta 9

What happens if you forget to update the loop variable inside the while?

Opcion A Nothing Opcion B The loop can become infinite Opcion C The program stops Opcion D It fixes itself automatically

Pregunta 10

What does this code print?

Snippet c

int i = 1;
int sum = 0;

while(i <= 3){
    sum += i;
    i++;
}

printf("%d", sum);

Opcion A 3 Opcion B 6 Opcion C 9 Opcion D 1

Pregunta 11

When is the while condition evaluated?

Opcion A After running the loop Opcion B Before running the loop Opcion C At the end of the program Opcion D Only once

Pregunta 12

What does this program print?

Snippet c

int i = 2;

while(i <= 6){
    printf("%d ", i);
    i += 2;
}

Opcion A 2 4 6 Opcion B 1 3 5 Opcion C 2 4 Opcion D 2 4 6 8

Pregunta 13

What does this code do?

Snippet c

int i = 0;

while(i < 3){
    printf("C ");
    i++;
}

Opcion A Prints C three times Opcion B Prints C once Opcion C Prints C forever Opcion D Prints nothing

Pregunta 14

What does this code print?

Snippet c

int i = 3;

while(i > 3){
    printf("%d", i);
}

Opcion A 3 Opcion B 0 Opcion C Nothing Opcion D Infinite loop

Pregunta 15

What does this program print?

Snippet c

int i = 1;

while(i < 4){
    printf("%d ", i);
    i++;
}

Opcion A 1 2 3 Opcion B 1 2 Opcion C 2 3 4 Opcion D 1 2 3 4

Pregunta 16

What is the point of incrementing the loop variable?

Opcion A To avoid infinite loops Opcion B To print numbers Opcion C To declare variables Opcion D To stop the program

Pregunta 17

What does this code print?

Snippet c

int i = 1;

while(i <= 4){
    printf("%d ", i*2);
    i++;
}

Opcion A 2 4 6 8 Opcion B 1 2 3 4 Opcion C 2 4 6 Opcion D 4 6 8

Pregunta 18

What does this program print?

Snippet c

int i = 0;

while(i < 3){
    printf("%d ", i);
    i++;
}

Opcion A 0 1 2 Opcion B 1 2 3 Opcion C 0 1 Opcion D 1 2

Pregunta 19

What does this code print?

Snippet c

int i = 3;

while(i > 0){
    printf("%d ", i);
    i--;
}

Opcion A 1 2 3 Opcion B 3 2 1 Opcion C 3 2 Opcion D 1 2

Pregunta 20

Which is a good practice when using while?

Opcion A Do not change the control variable Opcion B Make sure the condition eventually becomes false Opcion C Avoid using printf Opcion D Remove the condition

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