B. V. Patel Institute of BMC & IT 2014

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1 Unit 1: Introduction Short Questions: 1. What are the rules for writing PHP code block? 2. Explain comments in your program. What is the purpose of comments in your program. 3. How to declare and use constants in PHP. 4. Explain the function : gettype() 5. What is the difference between is_numeric() and is_int()? 6. What is the difference between == and ===? 7. What is the difference between!= and!===? 8. Write the difference between print() and echo. 9. What will be the output of following code: echo is_numeric("0.5"); 10. Explain : echo 11. Which are the valid PHP tags? 12. Which are the possible return datatypes for gettype() function? 13. Which is a better way to check the variable datatype is array : is_array() or gettype()? Why? 14. What is the difference between isset() and unset() functions? 15. What will be the output of following code: int $var = 5; echo $var; 16. How to use static variables in PHP. 17. What is the difference between using double quote and single quote for representing string? 18. What is variables variable? Explain with example. 19. What do you mean by string interpolation? Explain with example. 20. Which escape sequence characters are supported in a string written using single quotation? 21. What is heredoc syntax? Explain with example. 22. In which case you can avoid closing tag of PHP? Long Questions: 1. Explain parsing of PHP code in detail. 2. Which are the basic datatypes in PHP? Explain each with example. 3. Write a note about Operators in PHP. 4. Explain superglobals with example. 5. Write a note on scope of variables in PHP. 6. What functions can be used to identify datatype of the variable? 7. Explain each valid PHP tag with example. Page 1

2 8. Write a note on type conversion in PHP. 9. Which are the three ways of writing string in PHP? Explain each with proper example. Multi Choice Questions: 1. What PHP stands for? a) Hypertext Preprocessor b) Pre Hypertext Processor c) Pre Hyper Processor d) Pre Hypertext Process 2. Which of the following tag is not a valid way to begin and end a PHP code block? a) <% %> b) <? c) <?= d) 3. How does the identity operator === compare two values? a) It converts them to a common compatible data type and then compares the resulting values b) It returns True only if they are both of the same type and value c) If the two values are strings, it performs a lexical comparison d) It bases its comparison on the C strcmp function exclusively e) It converts both values to strings and compares them 4. Which of the following is not valid PHP code? a) $_10 b) ${ My Var } c) &$something d) $10_somethings e) $avar 5. Which of the following will not combine strings $s1 and $s2 into a single string? a) $s1 + $s2 b) {$s1}{$s2} c) $s1.$s2 d) Implode(, array($s1, $s2)) e) All of the above combine the strings 6. What happens if you add a string to an integer using the + operator? a) The interpreter outputs a type mismatch error b) The string is converted to a number and added to the integer c) The string is discarded and the integer is preserved d) The integer and string are concatenated together in a new string Page 2

3 e) The integer is discarded and the string is preserved 7. Which of the following way below is not correct to comment a single line of code in PHP? a) //Commented line b) #commented line c)!commented line d) /*commented line*/ e) None of above 8. What is the difference between echo and print? a) They both behave the same. b) Print can take multiple parameters where as echo cannot c) Echo can take multiple parameters where as print cannot d) Print is a function where as echo is not 9. Which of the following function returns the number of characters in a string variable? a) count($variable) b) len($variable) c) strcount($variable) d) strlen($variable) 10. A script is a a) Program or sequence of instructions that is interpreted or carried out by processor directly b) Program or sequence of instruction that is interpreted or carried out by another program c) Program or sequence of instruction that is interpreted or carried out by web server only d) None of above 11. You can define a constant by using the define() function. Once a constant is defined a) It can never be changed or undefined b) It can never be changed but can be undefined c) It can be changed but cannot be undefined d) It can be changed and can be undefined True False: 1. PHP is open source software. 2. PHP only runs on UNIX platform. 3. Each statement in PHP block must end with semicolon. 4. PHP function echo can accept more than one parameter. Page 3

4 5. PHP supports explicit type definition in variable declaration. 6. Array of PHP can have data of different type. 7. Echo does not return any value. 8. === operator checks value of both variables and return true if it is same. 9. <? is a valid PHP tag. 10. is_boolean() function is used to check whether the variable is Boolean or not. 11. is_integer() function is used to check whether the variable is integer or not. 12. <?= is an invalid PHP tag. 13. Each PHP variable must be declared before it is used. 14. You can execute PHP page from anywhere in your storage disk. 15. PHP engine will only parse pages having.php extension. Unit 2: Flow Control and Array Short Questions: 1. What is the difference between if else and?: operator? 2. Explain?: operator with example. 3. Explain the scenario when break statement is not used in switch. 4. Explain alternate syntax of if else. 5. What is the basic difference between if else and?: operator? 6. How to access index of array? Explain with example. 7. What will be the output of following code: $arr = array(4,6,8); print_r($arr); 8. Can break statement have parameters? If yes, how? 9. Can continue statement have parameters? If yes, how? 10. How can I create an array of numbers easily? 11. How to display two dimensional array? 12. How do I check if the variable is an array? 13. Which function is used to display each element of array? 14. What will be the output of following code: for ($i = 0;$i < 5;$i++) { for($j = 0;$j < 5;$j++) { If($i == 3) continue 2; echo $i; } echo <br> ; } Page 4

5 15. Write one single statement which displays zero if value of $i is zero else displays not zero. Long Questions: 1. Which are the conditional statements in PHP? Explain each with example. 2. Which are the looping structures in PHP? Explain each with example. 3. Write a note on : PHP Array. 4. How many types of arrays are there in PHP? Explain each with example. 5. How can you implement multidimensional array in PHP? Explain with example. 6. Explain print_r() function with example. 7. Explain if else with example. 8. Explain for loop with example. 9. Explain while loop with example. 10. Explain foreach loop with example. 11. Explain do while loop with example. 12. Explain the difference between while and do while loop. 13. Explain the difference between for and foreach loop. 14. Explain the difference between if else and switch. 15. Explain break and continue with example. Also explain its difference. 16. Explain Exit, die and return with example. Multi Choice Questions: 1. What will the following script output? $array = array(1,2,3,5,8,13,21,34,55); $sum = 0; for($i = 0; $i < 5; $i++) { $sum += $array[$array[$i]]; } echo $sum; a) 78 b) 19 c) NULL d) 5 e) 0 2. What elements will the following script output? $array = array(true => a, 1 => b ); var_dump($array); a) 1 => b ; Page 5

6 b) c) d) e) True => a, 1=> b 0 => a, 1 => b None It will output NULL 3. There are three different kind of arrays: a) Numeric array, String array, Multidimensional array b) Numeric array, Associative array, Dimensional array c) Numeric array, Associative array, Multidimensional array d) Const array, Associative array, Multidimensional array 4. What function count elements in an array? a) count b) sizeof c) length d) All of above 5. What array will you get if you convert an object to an array? a) An array with properties of that object as the array s elements. b) An array with properties of that array as the object s elements. c) An array with properties of that object as the Key elements. d) An array with keys of that object as the array s elements. 6. Which of the following is the correct syntax of initializing array? a) $arr = array(); b) $arr = array( one, two, three, four ); c) $arr = array( one => 1, two => 2, three => 3, four => 4); d) All of the above 7. What will be the output of the following code: <? $a = 5; echo $a; a) 5 b) Error c) NULL d) None of above True False: 1. PHP arrays are collection of values having same datatypes. 2. Break statement can break only one loop. 3. Exit and die are same except that, die can display error message. Page 6

7 4.?: can be used to check only one condition. 5. In if else one must use {} to write the code block. 6. Default case is compulsory in switch. 7. Default case must be written at the end in switch. 8. One must use break statement in each case of switch. 9. While and do while are same. 10. Using die statement you can stop the execution of remaining program and also can display error message. 11. Continue statement can accept one parameter which is optional. 12. Do while loop always checks the condition and then execute the code block. 13. You can access the index of array using for loop. 14. It is compulsory to give continues index in PHP array. 15. Return statement can accept only one parameter which can be of any type. Unit 3: Working with Data and State management Short Questions: 1. Which are the two types of validations? 2. List the input element of HTML form. 3. How you can create input element for fie upload? 4. How to create an input element for listbox? 5. How to add options in dropdown box? 6. How to add options with different groups in dropdown box? 7. What do you mean by user input validation? 8. Give different examples of clientside validation. 9. Give different examples of serverside validation. 10. Give examples in which you must use serverside validation in which clientside validation is not useful. 11. Create a textbox which will only accept numeric values. 12. Create a textbox which will only accept alphabets. 13. Create a textbox which will only accept alphanumeric values. 14. Create a set of radiobutton for gender in which Male option will be by default checked. 15. Write a code to create an array of input element textbox. 16. How can you submit a form without using submit button? 17. What is query string? Long Questions: 1. Write a note on form tag. 2. Explain any 5 input elements in detail. 3. Explain input tag and its type attribute in detail. 4. Write a note: Importance of validating user s input. 5. Which are the two types of validation? Explain each in details. 6. What do you mean by Clientside validation? Explain with example. 7. What do you mean by Serverside validation? Explain with example. Page 7

8 8. What is the difference between clientside validation and serverside validation? 9. Which one in better validation among clientside validation and serverside validation? Justify. 10. How can you pass the data from one page to another page? Explain with example. 11. Explain use of $_GET. 12. Explain use of $_POST. 13. Explain use of $_REQUEST. 14. Explain the difference between $_GET and $_POST. 15. Explain the difference between $_GET, $_POST and $_REQUEST. 16. What is query string? Explain with example. Multi Choice Questions: 1. Which of the following variables is not a predefined variable? a. $_GET b. $_POST c. $_REQUEST d. $_ASK 2. Which one of the following is not a superglobal array used to pass data from one page to another page? a. $_POST b. $_GET c. $_REQUEST d. None of the above 3. Which one of the following is not a superglobal array used to pass data from one page to another page? a. $_POST b. $_GET c. $_REQUEST d. All of the above 4. Which one of the following is not a possible value of type attribute in <input>. a. text b. button c. checkbox d. textarea 5. Which one of the following is not a possible value of type attribute in <input>. a. text b. radiobutton c. checkbox d. password Page 8

9 6. Which of the following method sends input to a script via a URL? a. Get b. Post c. Both d. None 7. Which of the following method is suitable when you need to send larger form submissions? a. Get b. Post c. Both Get and Post d. There is no direct way for larger form. You need to store them in a file and retrieve. 8. With regards to addresses: a. They must always contain symbol b. They can never contain spaces c. They are case-insensitive d. All of the above True False: 1. We can create a textarea using input tag. 2. Dropdown is one possible value of type attribute of input element. 3. You can create a file upload input element using input tag. 4. You have to write type= fileupload to create an input element for file upload. 5. You can verify username and password using clientside validation. 6. You must use serverside validation to verify the uniqueness of username in registration form. 7. You can get data from a URL using $_REQUEST. 8. You can also pass data using anchor tag. 9. $_REQUEST is a superglobal which is a combination of $_POST and $_GET. Page 9

Web Application Development (WAD) V th Sem BBAITM(Unit-1) By: Binit Patel

Web Application Development (WAD) V th Sem BBAITM(Unit-1) By: Binit Patel Introduction: PHP (Hypertext Preprocessor) was invented by Rasmus Lerdorf in 1994. First it was known as Personal Home Page. Later