Question

Computer science multiple choice: no explanation needed it

27. Which type of loop will always execute its code at least Once? a while cfor b. do-while d. for in 28. What does $message contain after the following code executes? Srate 0.1; if (!is_numeric Srate)) { Smessage 'Rate is not a number. } else if (Srate < 0) { Smessage 'Rate cannot be less than zero": else if ($rate >0.2) [ Smessage "Rate cannot be greater than 20%." } else { Smessage = 'Rate is valid." a. Rate is not a number. c rate cannot be greater than 20% b. Rate cannot be less d. Rate is valid than rero. 29. What does message contain after the following code executes? $statusCode 403"; switch( $statusCode) case "200": Smessage "OK": break; case "403": $message "Forbidden"; break; case "404": $message "Not Found"; break; default: $message = "Unknown Status"; break; а. Ок C. Not Found b. Forbidden d. Unknown Status 30. What does shipping cost contain after the following code executes? Squantity = 3; $shipping cost (Squantity > 1)? 5. Squantity 2.5): S; a. 5 C10 b. 7.5 d. 12.5 31. Which type of statement ends or jumps out of a loop? a. break C for b. continue d. next 32. A natural comparison of two values a. is case-sensitive b. is case insensitive c. puts both "09" and "9" before "10" d. puts "10" before both "09" and "9"

Answer 1

27. b) do-while

do-while loop will execute atleast once as it checks its exit condition at last.

Syntax:- do{

statements

}while(condition);

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28. d) Rate is valid

Explanation:-

$rate is 0.1 so it's numeric first condition fails

$rate is greater than 0 , 2nd condition fails

$ rate is less than 0.2, 3rd condition fails

else will execute.

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29. b) Forbidden

Explanation:-

switch case statement will take one parameter as input and match it with the defined cases.

Here $statuscode is input to swich and the case matched is case "403"

So the message will be Forbidden

As break statement is their so it won't execute further.

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30. b) 7.5

Explanation:-

operator used for assigning value to statuscode is called Ternary Operator.

If the condition results true , the statement after ? will execute else statement after : will execute.

Here quantity >1 so true statement will execute.

3* 2.5 =7.5

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31. a) break

Explanation:-

break statement will forcefully exit from the loop

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32. a) is case-sensitive

Explanation:-

Anoop is not equal to anoop.

So the natural comparison is case sensitive.

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