Tests

C Beginner 15 min

While in C - Full practice

Practice test on the use of while loops in C.

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C Beginner 15 min 30 preguntas

While in C - Full practice

Practice test on the use of while loops in C.

Pregunta 1

What is the while loop used for in C?

Opcion A To repeat code while a condition is true Opcion B To declare variables Opcion C To print text Opcion D To define functions

Pregunta 2

When is the while condition evaluated?

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

Pregunta 3

What does this code 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 3 2 1

Pregunta 4

What happens if the while condition never becomes false?

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

Pregunta 5

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 6

Which is the correct syntax?

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

Pregunta 7

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 1 2 3

Pregunta 8

What does this code do?

Snippet c

int i = 1;
while(i <= 5){
    printf("Hi ");
    i++;
}

Opcion A Prints Hi 5 times Opcion B Prints Hi 1 time Opcion C Prints Hi forever Opcion D Prints nothing

Pregunta 9

Which variable usually controls the while loop?

Opcion A The control variable Opcion B printf Opcion C main Opcion D scanf

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

What does this code 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 12

What happens if you do not update the loop variable?

Opcion A The loop can become infinite Opcion B The program ends Opcion C It runs only once Opcion D The compiler fixes it

Pregunta 13

What does this code print?

Snippet c

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

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

Pregunta 14

How many times does the while run?

Snippet c

int i = 0;
while(i < 4){
    i++;
}

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

Pregunta 15

What does this 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 Opcion D 1 2 3 4

Pregunta 16

What does this 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 17

What does this 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 18

How many times does it run?

Snippet c

int i = 0;
while(i < 2){
    printf("C ");
    i++;
}

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

Pregunta 19

What does this print?

Snippet c

int i = 1;
while(i <= 3){
    printf("%d ", i+1);
    i++;
}

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

Pregunta 20

Which is a good practice when using while?

Opcion A Never change the variable Opcion B Make sure the condition eventually becomes false Opcion C Remove the condition Opcion D Only use printf

Pregunta 21

What does this print?

Snippet c

int i = 0;
while(i < 3){
    printf("A ");
    i++;
}

Opcion A A A A Opcion B A Opcion C A A Opcion D Nothing

Pregunta 22

What does this print?

Snippet c

int i = 1;
while(i <= 2){
    printf("%d ", i);
    i++;
}

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

Pregunta 23

What does this print?

Snippet c

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

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

Pregunta 24

What does this print?

Snippet c

int i = 5;
while(i >= 3){
    printf("%d ", i);
    i--;
}

Opcion A 5 4 3 Opcion B 5 4 Opcion C 4 3 Opcion D 3 4 5

Pregunta 25

What does this print?

Snippet c

int i = 1;
while(i < 3){
    printf("B ");
    i++;
}

Opcion A B B Opcion B B Opcion C B B B Opcion D Nothing

Pregunta 26

What does this print?

Snippet c

int i = 1;
while(i <= 3){
    printf("%d ", i*3);
    i++;
}

Opcion A 3 6 9 Opcion B 1 2 3 Opcion C 3 6 Opcion D 9 6 3

Pregunta 27

What does this print?

Snippet c

int i = 4;
while(i > 1){
    printf("%d ", i);
    i--;
}

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

Pregunta 28

How many times does it run?

Snippet c

int i = 1;
while(i <= 5){
    i++;
}

Opcion A 5 Opcion B 4 Opcion C 6 Opcion D 1

Pregunta 29

What does this print?

Snippet c

int i = 0;
while(i < 2){
    printf("%d ", i+5);
    i++;
}

Opcion A 5 6 Opcion B 6 7 Opcion C 5 6 7 Opcion D 7 8

Pregunta 30

What is the main purpose of while?

Opcion A Repeat instructions under a condition Opcion B Declare variables Opcion C Create functions Opcion D Read data

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While in C - Full practice

While in C - Full practice

What is the while loop used for in C?

When is the while condition evaluated?

What does this code print?

What happens if the while condition never becomes false?

What does this code print?

Which is the correct syntax?

What does this code print?

What does this code do?

Which variable usually controls the while loop?

What does this code print?

What does this code print?

What happens if you do not update the loop variable?

What does this code print?

How many times does the while run?

What does this print?

What does this print?

What does this print?

How many times does it run?

What does this print?

Which is a good practice when using while?

What does this print?

What does this print?

What does this print?

What does this print?

What does this print?

What does this print?

What does this print?

How many times does it run?

What does this print?

What is the main purpose of while?

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