250+ TOP PHP Coding MCQs on Switch and Answers

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PHP Multiple Choice Questions on “Switch”.

1. What will be the output of the following PHP code?

  2. $a = "1";
  3. switch ($a)
  4. {
  5. case 1:
  6.     print "hi";
  7. case 2:
  8.     print "hello";
  9. default:
  10.     print "hi1";
  11. }
  12. ?>

a) hihellohi1
b) hi
c) hihi1
d) hi1
Answer: a
Clarification: As break is not provided it executes all the cases.

2. What will be the output of the following PHP code?

  2. $a = "2";
  3. switch ($a)
  4. {
  5. case 1:
  6.     print "hi";
  7. case 2:
  8.     print "hello";
  9.     break;
  10. default:
  11.     print "hi1";
  12. }
  13. ?>

a) hihellohi1
b) hello
c) hihi1
d) hi1
Answer: b
Clarification: As hello is provided after case2 it breaks the loop.

3. What will be the output of the following PHP code?

  2. $a = "1";
  3. switch($a)
  4. {
  5. case 1:
  6.     break;
  7.     print "hi";
  8. case 2:
  9.     print "hello";
  10.     break;
  11. default:
  12.     print "hi1";
  13. }
  14. ?>

a) hihellohi1
b) no output
c) hihi1
d) hi1
Answer: b
Clarification: As break is provided before print statement in case 2 it breaks the loop before printing.

4. What will be the output of the following PHP code?

  2. $a = "1";
  3. $a = 1;
  4. $b = 1;
  5. switch($a)
  6. {
  7. case $a * $b: 
  8.     print "hi";
  9.     break;
  10. case $a / $b:
  11.     print "hello";
  12.     break;
  13. default:
  14.     print "hi1";
  15. }
  16. ?>

a) hihellohi1
b) hi
c) hihello
d) hi1
Answer: b
Clarification: It checks the first case, when it finds it equal it will perform it breaks out.

5. What will be the output of the following PHP code?

  2. $a = 97;
  3. switch($a)
  4. {
  5. case "a":
  6.     print "hi";
  7.     break;
  8. case 97:
  9.     print "hello";
  10.     break;
  11. default:
  12.     print "hi1";
  13. }
  14. ?>

a) hihellohi1
b) hi
c) hihello
d) hello

Answer: d
Clarification: Downcasting does not happen in case, it compares only with its data type.

6. What will be the output of the following PHP code?

  2. $b = 1;
  3. switch($b)
  4. {
  5. case 1.0:
  6.     print "hi";
  7.     break;
  8. case 1:
  9.     print "hello";
  10.     break;
  11. default:
  12.     print "hi1";
  13. }
  14. ?>

a) hihellohi1
b) hi
c) hihello
d) hello
Answer: a
Clarification: Upcasting does happen in case, it compares it with 1.0 and thus prints hi and exits.

7. What will be the output of the following PHP code?

  2. const $b = 1;
  3. switch($b)
  4. {
  5. case 1:
  6.     print "hi";
  7.     break;
  8. case 1:
  9.     print "hello";
  10.     break;
  11. default:
  12.     print "hi1";
  13. }
  14. ?>

a) error
b) hi
c) hihello
d) hello
Answer: a
Clarification: Constants cannot be used in switch cases.

8. What will be the output of the following PHP code?

  2. $b = 1;
  3. switch(print $b)
  4. {
  5. case 2:
  6.     print "hello";
  7.     break;
  8. case 1:
  9.     print "hi";
  10.     break;
  11. default:
  12.     print "hi1";
  13. }
  14. ?>

a) 1hello
b) 1hi
c) 1hi1
d) error
Answer: b
Clarification: Print returns 1, thus it gives case 1.

9. What will be the output of the following PHP code?

  2. switch($b)
  3. {
  4. case 2:
  5.     print "hello";
  6.     break;
  7. case 1:
  8.     print "hi";
  9.     break;
  10. }
  11. ?>

a) hello
b) hi
c) no output
d) error
Answer: c
Clarification: If that case does not exist then it searches for default and on not finding it does nothing.

10. What will be the output of the following PHP code?

  2. switch($b)
  3. {
  4. case 2:
  5.     print "hello";
  6.     break;
  7. case b:
  8.     print "hi";
  9.     break;
  10. }
  11. ?>

a) hello
b) hi
c) no output
d) error

Answer: c
Clarification: Case cannot be defined by a variable.

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