Class 4: Control Structures - Part 1(MCQ)

 

 MULTIPLE CHOICE QUSTION-SET 4

Class 4: Control Structures - Part 1   (Implementing conditions and multiple case scenarios ,scripts that use if, else if, else, and switch statements to control the flow of their code based on different conditions) 1. Which of the following PHP code snippets will print "Hello, World!" only if the variable $x is greater than 10? a)  if ($x > 10) { echo "Hello, World!"; } b) if ($x < 10) {     echo "Hello, World!"; } c) if ($x == 10) { echo "Hello, World!"; } d) if ($x != 10) {     echo "Hello, World!"; } Answer: a) ```php if ($x > 10) { echo "Hello, World!"; }  2. What will be the output of the following PHP code if `$day` is `3`? switch ($day) {     case 1:         echo "Monday";         break;     case 2:         echo "Tuesday";         break;     case 3:         echo "Wednesday";         break;     default:         echo "Weekend"; } a) Monday b) Tuesday c) Wednesday d) Weekend Answer: c) Wednesday 3. What will be the result of the following PHP code? $age = 20; if ($age >= 18) {     echo "Adult"; } else {     echo "Minor"; } a) Adult b) Minor c) Error d) Nothing Answer: a) Adult 4. Which of the following is the correct syntax for an else if statement in PHP? a) else if (condition) { // code } b) else (condition) {     // code } c) else if (condition): // code endif; d) else if (condition) {     // code } else {     // code } Answer: a)  else if (condition) { // code } 5. What will be the output of the following PHP code if `$score` is `85`? if ($score >= 90) {     echo "A"; } elseif ($score >= 80) {     echo "B"; } elseif ($score >= 70) {     echo "C"; } else {     echo "D"; } a) A b) B c) C d) D Answer: b) B 6. What will be the output of the following PHP code if $number is 5? switch ($number) {     case 1:         echo "One";         break;     case 2:         echo "Two";         break;     case 5:         echo "Five";         break;     default:         echo "Not Found"; } a) One b) Two c) Five d) Not Found Answer: c) Five 7. Which PHP statement will execute if $value is neither equal to 10 nor 20 in the following code? switch ($value) {     case 10:         echo "Ten";         break;     case 20:         echo "Twenty";         break;     default:         echo "Other"; } a) Ten b) Twenty c) Other d) Error Answer: c) Other 8. How do you handle multiple conditions in an if statement? a)  if (condition1 or condition2) { // code } b)if (condition1 && condition2) {     // code } c) if (condition1, condition2) { // code } d) ```php if (condition1 || condition2) {     // code } Answer: b)  if (condition1 && condition2) { // code } 9. What is the correct way to write an `else` statement in PHP?  a)else {     // code } b) else if { // code } c)elseif {     // code } d)else { // code } Answer a)  else {     // code } 10. What will be the output of the following PHP code if $temperature is -5? if ($temperature < 0) {     echo "Freezing"; } elseif ($temperature < 10) {     echo "Cold"; } elseif ($temperature < 20) {     echo "Cool"; } else {     echo "Warm"; } a) Freezing b) Cold c) Cool d) Warm Answer: a) Freezing 11. What will be the output of the following PHP code if $x is 15? if ($x > 10) {     echo "Greater"; } elseif ($x == 10) {     echo "Equal"; } else {     echo "Smaller"; } a) Greater b) Equal c) Smaller d) Error Answer: a) Greater 12. What is the correct syntax for a switch statement in PHP? a) switch (condition) { case value1: // code break; case value2: // code break; default: // code } b)  switch (expression) {     case value1:         // code         break;     case value2:         // code         break;     else:         // code } c)switch (expression) { case value1: // code break; case value2: // code break; default: // code } d) switch (expression) {     case value1:         // code     case value2:         // code         break;     default:         // code } Answer: a) ```php switch (condition) { case value1: // code break; case value2: // code break; default: // code } 13. What will be the output of the following PHP code if `$num` is `7`? if ($num % 2 == 0) {     echo "Even"; } else {     echo "Odd"; } a) Even b) Odd c) Error d) Nothing Answer: b) Odd 14. What is the result of the following PHP code if $value is 2? switch ($value) {     case 1:         echo "First";         break;     case 2:         echo "Second";         break;     case 3:         echo "Third";         break;     default:         echo "None"; } a) First b) Second c) Third d) None Answer: b) Second 15. How many break statements are required in a switch statement if you want to execute only one case? a) None b) One c) Two d) Depends on the number of cases Answer: b) One 16. What will be the output of the following PHP code if $score is 55? if ($score >= 90) {     echo "Excellent"; } elseif ($score >= 70) {     echo "Good"; } elseif ($score >= 50) {     echo "Pass"; } else {     echo "Fail"; } a) Excellent b) Good c) Pass d) Fail Answer: c) Pass 17. What will be the output of the following PHP code if $x is 0? if ($x) {     echo "True"; } else {     echo "False"; } a) True b) False c) Error d) Nothing Answer: b) False 18. What is the correct syntax for using multiple case statements in a switch block? a) case value1: case value2: // code break; b) case value1 || value2:     // code     break; c) case value1, value2: // code break; d)case value1, value2:     // code     continue; Answer: a)  case value1: case value2: // code break; 19. What will be the output of the following PHP code if `$a` is `5` and `$b` is `10`? if ($a > $b) {     echo "a is greater"; } elseif ($a < $b) {     echo "b is greater"; } else {     echo "a and b are equal"; } a) a is greater b) b is greater c) a and b are equal d) Error Answer: b) b is greater 20. Which statement will execute if none of the case conditions match in a switch statement? a) The code block following break b) The code block following continue c) The code block following default d) None Answer: c) The code block following default 21. What will be the result of the following PHP code if $age is 25? if ($age < 13) {     echo "Child"; } elseif ($age < 20) {     echo "Teenager"; } elseif ($age < 60) {     echo "Adult"; } else {     echo "Senior"; } a) Child b) Teenager c) Adult d) Senior Answer: c) Adult 22. What will be the output of the following PHP code if $x is 5? php Copy code switch ($x) {     case 1:     case 2:     case 3:         echo "Low";         break;     case 4:     case 5:         echo "Medium";         break;     case 6:     case 7:         echo "High";         break;     default:         echo "Undefined"; } a) Low b) Medium c) High d) Undefined Answer: b) Medium 23. What will be the output of the following PHP code if $number is 10? if ($number % 2 == 0) {     if ($number % 3 == 0) {         echo "Divisible by 6";     } else {         echo "Divisible by 2 but not 3";     } } else {     echo "Not divisible by 2"; } a) Divisible by 6 b) Divisible by 2 but not 3 c) Not divisible by 2 d) Error Answer: b) Divisible by 2 but not 3 24. What will be the result of the following PHP code if $score is 75? if ($score >= 50 && $score < 60) {     echo "Pass"; } elseif ($score >= 60 && $score < 75) {     echo "Good"; } elseif ($score >= 75) {     echo "Excellent"; } else {     echo "Fail"; } a) Pass b) Good c) Excellent d) Fail Answer: a) Good 25. Which PHP statement will be executed if $day is 7 in the following code? switch ($day) {     case 1:         echo "Monday";         break;     case 2:         echo "Tuesday";         break;     case 3:         echo "Wednesday";         break;     case 4:         echo "Thursday";         break;     case 5:         echo "Friday";         break;     case 6:         echo "Saturday";         break;     case 7:         echo "Sunday";         break;     default:         echo "Invalid day"; } a) Monday b) Saturday c) Sunday d) Invalid day Answer: c) Sunday 26. What will be the result of the following PHP code if $age is 16? if ($age >= 13 && $age < 18) {     echo "Teen"; } else {     echo "Not a Teen"; } a) Teen b) Not a Teen c) Error d) Nothing Answer: a) Teen 27. What will be the output of the following PHP code if $x is 3? switch ($x) {     case 1:         echo "One";         break;     case 2:     case 3:         echo "Two or Three";         break;     case 4:         echo "Four";         break;     default:         echo "Other"; } a) One b) Two or Three c) Four d) Other Answer: b) Two or Three 28. What will be the result of the following PHP code if $number is 7? if ($number > 5) {     if ($number < 10) {         echo "Between 6 and 9";     } else {         echo "10 or greater";     } } else {     echo "5 or less"; } a) Between 6 and 9 b) 10 or greater c) 5 or less d) Error Answer: a) Between 6 and 9 29. What will be the output of the following PHP code if $value is 4? switch ($value) {     case 1:     case 2:     case 3:         echo "Low";         break;     case 4:     case 5:         echo "Medium";         break;     case 6:         echo "High";         break;     default:         echo "Undefined"; } a) Low b) Medium c) High d) Undefined Answer: b) Medium 30. What will be the result of the following PHP code if $x is true? if ($x) {     echo "True"; } else {     echo "False"; } a) True b) False c) Error d) Nothing Answer: a) True 31. What will be the output of the following PHP code if $temperature is -1? if ($temperature > 0) {     echo "Above freezing"; } elseif ($temperature == 0) {     echo "At freezing"; } else {     echo "Below freezing"; } a) Above freezing b) At freezing c) Below freezing d) Error Answer: c) Below freezing 32. Consider the following code. What will be the output if $value is 3? switch ($value) {     case 1:         echo "One";         break;     case 2:         echo "Two";         break;     case 3:     case 4:         echo "Three or Four";         break;     default:         echo "Other"; } a) One b) Two c) Three or Four d) Other Answer: c) Three or Four 33. What will be the output of the following PHP code? $x = 10; if ($x < 5) {     echo "Less than 5"; } elseif ($x < 15) {     echo "Between 5 and 15"; } else {     echo "15 or more"; } a) Less than 5 b) Between 5 and 15 c) 15 or more d) Error Answer: b) Between 5 and 15 34. What will be the result of the following PHP code if $day is 6? switch ($day) {     case 1:     case 2:     case 3:     case 4:     case 5:         echo "Weekday";         break;     case 6:     case 7:         echo "Weekend";         break;     default:         echo "Invalid day"; } a) Weekday b) Weekend c) Invalid day d) Error Answer: b) Weekend 35. How would you correctly handle multiple conditions in a nested if statement? $age = 20; $membership = "Gold"; if ($age > 18) {     if ($membership == "Gold") {         echo "Adult Gold Member";     } else {         echo "Adult Non-Gold Member";     } } else {     echo "Not an Adult"; } a) Adult Gold Member b) Adult Non-Gold Member c) Not an Adult d) Error Answer: a) Adult Gold Member 36. What is the output of the following PHP code if $x is 15? switch (true) {     case ($x < 10):         echo "Less than 10";         break;     case ($x >= 10 && $x <= 20):         echo "Between 10 and 20";         break;     case ($x > 20):         echo "Greater than 20";         break;     default:         echo "Undefined"; } a) Less than 10 b) Between 10 and 20 c) Greater than 20 d) Undefined Answer: b) Between 10 and 20 37. What will be the result of this PHP code if $score is 85? if ($score >= 90) {     echo "Excellent"; } elseif ($score >= 80) {     echo "Very Good"; } elseif ($score >= 70) {     echo "Good"; } else {     echo "Needs Improvement"; } a) Excellent b) Very Good c) Good d) Needs Improvement Answer: b) Very Good 38. What will be the output of the following PHP code if $value is 7? switch ($value % 2) {     case 0:         echo "Even";         break;     case 1:         echo "Odd";         break;     default:         echo "Unknown"; } a) Even b) Odd c) Unknown d) Error Answer: b) Odd 39. What will be the result of the following PHP code if $score is 60? if ($score >= 50) {     if ($score >= 60) {         echo "Pass";     } else {         echo "Fail";     } } else {     echo "Fail"; } a) Pass b) Fail c) Error d) Nothing Answer: a) Pass 40. Which of the following PHP statements will output "Hello World" based on $language? switch ($language) {     case "English":         echo "Hello World";         break;     case "Spanish":         echo "Hola Mundo";         break;     case "French":         echo "Bonjour le Monde";         break;     default:         echo "Language not supported"; } a) Hello World b) Hola Mundo c) Bonjour le Monde d) Language not supported Answer: a) Hello World (assuming $language is set to "English") 41. What will be the output of the following PHP code if $age is 18? if ($age < 18) {     echo "Minor"; } elseif ($age >= 18 && $age <= 65) {     echo "Adult"; } else {     echo "Senior"; } a) Minor b) Adult c) Senior d) Error Answer: b) Adult 42. What is the output of the following PHP code if $score is 100? if ($score >= 90) {     echo "A"; } elseif ($score >= 80) {     echo "B"; } elseif ($score >= 70) {     echo "C"; } elseif ($score >= 60) {     echo "D"; } else {     echo "F"; } a) A b) B c) C d) D Answer: a) A 43. What will be the output of the following PHP code if $day is 5? switch ($day) {     case 1:     case 2:     case 3:     case 4:     case 5:         echo "Weekday";         break;     case 6:     case 7:         echo "Weekend";         break;     default:         echo "Invalid day"; } a) Weekday b) Weekend c) Invalid day d) Error Answer: a) Weekday 44. What will be the result of this PHP code if $x is 0? if ($x) {     echo "True"; } else {     echo "False"; } a) True b) False c) Error d) Nothing Answer: b) False 45. What will be the output of the following PHP code? $x = 10; $y = 20; if ($x > $y) {     echo "x is greater"; } elseif ($x < $y) {     echo "y is greater"; } else {     echo "x and y are equal"; } a) x is greater b) y is greater c) x and y are equal d) Error Answer: b) y is greater 46. What will be the output of the following PHP code if $value is 3? switch ($value) {     case 1:         echo "One";         break;     case 2:         echo "Two";         break;     case 3:     case 4:         echo "Three or Four";         break;     default:         echo "Other"; } a) One b) Two c) Three or Four d) Other Answer: c) Three or Four 47. What will be the output of the following PHP code? $x = 10; $y = 20; $z = 30; if ($x < $y) {     if ($y < $z) {         echo "All conditions true";     } else {         echo "Second condition false";     } } else {     echo "First condition false"; } a) All conditions true b) Second condition false c) First condition false d) Error Answer: a) All conditions true 48. What will be the output if $x is 2 and $y is 3? if ($x == 2 && $y == 3) {     echo "Both are correct"; } elseif ($x == 2 || $y == 3) {     echo "One is correct"; } else {     echo "Neither is correct"; } a) Both are correct b) One is correct c) Neither is correct d) Error Answer: a) Both are correct 49. What will be the result of the following PHP code? $x = 5; switch (true) {     case ($x < 5):         echo "Less than 5";         break;     case ($x == 5):         echo "Equal to 5";         break;     case ($x > 5):         echo "Greater than 5";         break;     default:         echo "Undefined"; } a) Less than 5 b) Equal to 5 c) Greater than 5 d) Undefined Answer: b) Equal to 5 50. What will be the output of the following PHP code if $score is 65? if ($score >= 70) {     echo "Pass"; } else {     if ($score >= 60) {         echo "Barely Pass";     } else {         echo "Fail";     } } a) Pass b) Barely Pass c) Fail d) Error Answer: b) Barely Pass                             ***************************