16 Programming phone screen questions

1. You are shrunk to the height of a nickel and your mass is proportionally reduced so as to maintain your original density. You are then thrown into an empty glass blender. The blades will start moving in 60 seconds. What do you do?
2. How would you find out if a machine’s stack grows up or down in memory?
3. Explain a database in three sentences to your eight-year-old nephew.
4. How many gas stations would you say there are in the United States?
5. How many golf balls can fit in a school bus?
6. How much should you charge to wash all the windows in San Francisco?
7. How many times a day does a clock’s hands overlap?
8. How many piano tuners are there in the entire world?
9. You have eight balls all of the same size. 7 of them weigh the same, and one of them weighs slightly more. How can you find the ball that is heavier by using a balance and only two weighings?
10. You have five pirates, ranked from 5 to 1 in descending order. The top pirate has the right to propose how 100 gold coins should be divided among them. But the others get to vote on his plan, and if fewer than half agree with him, he gets killed. How should he allocate the gold in order to maximize his share but live to enjoy it? (Hint: One pirate ends up with 98 percent of the gold.)
11. You have to get from point A to point B. You don’t know if you can get there. What would you do?
12. Imagine you have a closet full of shirts. It’s very hard to find a shirt. So what can you do to organize your shirts for easy retrieval?
13. Every man in a village of 100 married couples has cheated on his wife. Every wife in the village instantly knows when a man other than her husband has cheated, but does not know when her own husband has. The village has a law that does not allow for adultery. Any wife who can prove that her husband is unfaithful must kill him that very day. The women of the village would never disobey this law. One day, the queen of the village visits and announces that at least one husband has been unfaithful. What happens?
14. In a country in which people only want boys, every family continues to have children until they have a boy. if they have a girl, they have another child. if they have a boy, they stop. what is the proportion of boys to girls in the country?
15. If the probability of observing a car in 30 minutes on a highway is 0.95, what is the probability of observing a car in 10 minutes (assuming constant default probability)?
16. If you look at a clock and the time is 3:15, what is the angle between the hour and the minute hands?

Posted in: Interview Questions | Tags: interview programming phone screen quesions phone screen us hint

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PHP interview questions and answers, from Yahoo!

1. Which of the following will not add john to the users array?

         1. $users[] = 'john';
         2. array_add($users,'john');
         3. array_push($users,'john');
         4. $users ||= 'john';

2. What’s the difference between sort(), assort() and ksort? Under what circumstances would you use each of these?

3. What would the following code print to the browser? Why?

      $num = 10;
      function multiply(){
            $num = $num * 10;
      }
      multiply();
      echo $num;

4. What is the difference between a reference and a regular variable? How do you pass by reference & why would you want to?

5. What functions can you use to add library code to the currently running script?

6. What is the difference between foo() & @foo()?

7. How do you debug a PHP application?

8. What does === do? What’s an example of something that will give true for ‘==’, but not ‘===’?

9. How would you declare a class named “myclass” ? with no methods or properties?

10. How would you create an object, which is an instance of ‘“myclass’??

11. How do you access and set properties of a class from within the class?

12. What is the difference between include & include_once? include & require?

13. What function would you use to redirect the browser to a new page?

         1. redir()
         2. header()
         3. location()
         4. redirect()

14. What function can you use to open a file for reading and writing?

         1. fget();
         2. file_open();
         3. fopen();
         4. open_file();

15. What’s the difference between mysql_fetch_row() and mysql_fetch_array()?

16. What does the following code do? Explain what’s going on there.

      $date='08/26/2003';
      print ereg_replace('“([0-9]+)/([0-9]+)/([0-9]+)'‚¬?,\\2/\\1/\\3,$date);

17. Given a line of text $string, how would you write a regular expression to strip all the HTML tags from it?

18. What’s the difference between the way PHP and Perl distinguish between arrays and hashes?

19. How can you get round the stateless nature of HTTP using PHP?

20. What does the GD library do?

21. Name a few ways to output (print) a block of HTML code in PHP?

22. Is PHP better than Perl? – Discuss.

Posted in: Interview Questions | Tags: interview questions and answers interview php yahoo sort ksort web foo

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Top 10 Web architect interview questions and answers

1. What is frame level testing and how do we test it?
2. Write test case for a search engine?
3. How do you test the URL of a Web-based application?
4. What is Web architecture that are followed while doing online project and tell the samples of architecture?
5. I how to test Web application in which the value is changing dynamic every time and anyone can modify it?
6. Write a test case scenario for Web-based address book?
7. How to test iBackup and storage products?
8. How can you test the security of a Web site,both manually and by using a tool.
9. What happens in a Web application when you enter all the data and click on submit button?
10. How to kill cookies from Web page?

Posted in: Interview Questions asp.net | Tags: interview web web architect interview questions top 10 frame search engine cookie

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Top 10 Apache interview questions and answers

1. On a fresh install, why does Apache have three config files - srm.conf, access.conf and httpd.conf? - The first two are remnants from the NCSA times, and generally you should be ok if you delete the first two, and stick with httpd.conf.
2. What’s the command to stop Apache? - kill the specific process that httpd is running under, or killall httpd. If you have apachectl installed, use apachectl stop.
3. What does apachectl graceful do? - It sends a SIGUSR1 for a restart, and starts the apache server if it’s not running.
4. How do you check for the httpd.conf consistency and any errors in it? - apachectl configtest
5. When I do ps -aux, why do I have one copy of httpd running as root and the rest as nouser? - You need to be a root to attach yourself to any Unix port below 1024, and we need 80.
6. But I thought that running apache as a root is a security risk? - That one root process opens port 80, but never listens to it, so no user will actually enter the site with root rights. If you kill the root process, you will see the other kids disappear as well.
7. Why do I get the message "… no listening sockets available, shutting down"? - In Apache 2 you need to have a listen directive. Just put Listen 80 in httpd.conf.
8. What is ServerType directive? - It defines whether Apache should spawn itself as a child process (standalone) or keep everything in a single process (inetd). Keeping it inetd conserves resources. This is deprecated, however.
9. What is mod_vhost_alias? - It allows hosting multiple sites on the same server via simpler configurations.
10. What does htpasswd do? - It creates a new user in a specified group, and asks to specify a password for that user.

Posted in: Interview Questions | Tags: interview questions and answers interview php website apache interview questions apachectl graceful mod_vhost_alias htpasswd

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Top 50 JavaScript & AJAX interview questions

1. Why so JavaScript and Java have similar name?

A. JavaScript is a stripped-down version of Java

B. JavaScript's syntax is loosely based on Java's

C. They both originated on the island of Java

D. None of the above

2. When a user views a page containing a JavaScript program, which machine actually executes the script?

A. The User's machine running a Web browser

B. The Web server

C. A central machine deep within Netscape's corporate offices

D. None of the above

3. ______ JavaScript is also called client-side JavaScript.

A. Microsoft

B. Navigator

C. LiveWire

D. Native

4. __________ JavaScript is also called server-side JavaScript.

A. Microsoft

B. Navigator

C. LiveWire

D. Native

5. What are variables used for in JavaScript Programs?

A. Storing numbers, dates, or other values

B. Varying randomly

C. Causing high-school algebra flashbacks

D. None of the above

6. _____ JavaScript statements embedded in an HTML page can respond to user events such as mouse-clicks, form input, and page navigation.

A. Client-side

B. Server-side

C. Local

D. Native

7. What should appear at the very end of your JavaScript?

The <script LANGUAGE="JavaScript">tag

A. The </script>

B.    The <script>

C. The END statement

D. None of the above

8. Which of the following can't be done with client-side JavaScript?

A. Validating a form

B. Sending a form's contents by email

C. Storing the form's contents to a database file on the server

D. None of the above

9. Which of the following are capabilities of functions in JavaScript?

A. Return a value

B. Accept parameters and Return a value

C. Accept parameters

D. None of the above

10. Which of the following is not a valid JavaScript variable name?

A. 2names

B. _first_and_last_names

C. FirstAndLast

D. None of the above

11. ______ tag is an extension to HTML that can enclose any number of JavaScript statements.

A. <SCRIPT>

B. <BODY>

C. <HEAD>

D. <TITLE>

12. How does JavaScript store dates in a date object?

A. The number of milliseconds since January 1st, 1970

B. The number of days since January 1st, 1900

C. The number of seconds since Netscape's public stock offering.

D. None of the above

13. Which of the following attribute can hold the JavaScript version?

A. LANGUAGE

B. SCRIPT

C. VERSION

D. None of the above

14. What is the correct JavaScript syntax to write "Hello World"?

A. System.out.println("Hello World")

B. println ("Hello World")

C. document.write("Hello World")

D. response.write("Hello World")

15. Which of the following way can be used to indicate the LANGUAGE attribute?

A. <LANGUAGE="JavaScriptVersion">

B. <SCRIPT LANGUAGE="JavaScriptVersion">

C. <SCRIPT LANGUAGE="JavaScriptVersion"> JavaScript statements…</SCRIPT>

D. <SCRIPT LANGUAGE="JavaScriptVersion"!> JavaScript statements…</SCRIPT>

16. Inside which HTML element do we put the JavaScript?

A. <js>

B. <scripting>

C. <script>

D. <javascript>

17. What is the correct syntax for referring to an external script called " abc.js"?

A. <script href=" abc.js">

B. <script name=" abc.js">

C. <script src=" abc.js">

D. None of the above

18. Which types of image maps can be used with JavaScript?

A. Server-side image maps

B. Client-side image maps

C. Server-side image maps and Client-side image maps

D. None of the above

19. Which of the following navigator object properties is the same in both Netscape and IE?

A. navigator.appCodeName

B. navigator.appName

C. navigator.appVersion

D. None of the above

20. Which is the correct way to write a JavaScript array?

A. var txt = new Array(1:"tim",2:"kim",3:"jim")

B. var txt = new Array:1=("tim")2=("kim")3=("jim")

C. var txt = new Array("tim","kim","jim")

D. var txt = new Array="tim","kim","jim"

21. What does the <noscript> tag do?

A. Enclose text to be displayed by non-JavaScript browsers.

B. Prevents scripts on the page from executing.

C. Describes certain low-budget movies.

D. None of the above

22. If para1 is the DOM object for a paragraph, what is the correct syntax to change the text within the paragraph?

A. "New Text"?

B. para1.value="New Text";

C. para1.firstChild.nodeValue= "New Text";

D. para1.nodeValue="New Text";

23. JavaScript entities start with _______ and end with _________.

A. Semicolon, colon

B. Semicolon, Ampersand

C. Ampersand, colon

D. Ampersand, semicolon

24. Which of the following best describes JavaScript?

A. a low-level programming language.

B. a scripting language precompiled in the browser.

C. a compiled scripting language.

D. an object-oriented scripting language.

25. Choose the server-side JavaScript object?

A. FileUpLoad

B. Function

C. File

D. Date

26. Choose the client-side JavaScript object?

A. Database

B. Cursor

C. Client

D. FileUpLoad

27. Which of the following is not considered a JavaScript operator?

A. new

B. this

C. delete

D. typeof

28. ______method evaluates a string of JavaScript code in the context of the specified object.

A. Eval

B. ParseInt

C. ParseFloat

D. Efloat

29. Which of the following event fires when the form element loses the focus: <button>, <input>, <label>, <select>, <textarea>?

A. onfocus

B. onblur

C. onclick

D. ondblclick

30. The syntax of Eval is ________________

A. [objectName.]eval(numeric)

B. [objectName.]eval(string)

C. [EvalName.]eval(string)

D. [EvalName.]eval(numeric)

31. JavaScript is interpreted by _________

A. Client

B. Server

C. Object

D. None of the above

32. Using _______ statement is how you test for a specific condition.

A. Select

B. If

C. Switch

D. For

33. Which of the following is the structure of an if statement?

A. if (conditional expression is true) thenexecute this codeend if

B. if (conditional expression is true)execute this codeend if

C. if (conditional expression is true) {then execute this code>->}

D. if (conditional expression is true) then {execute this code}

34. How to create a Date object in JavaScript?

A. dateObjectName = new Date([parameters])

B. dateObjectName.new Date([parameters])

C. dateObjectName := new Date([parameters])

D. dateObjectName Date([parameters])

35. The _______ method of an Array object adds and/or removes elements from an array.

A. Reverse

B. Shift

C. Slice

D. Splice

36. To set up the window to capture all Click events, we use which of the following statement?

A. window.captureEvents(Event.CLICK);

B. window.handleEvents (Event.CLICK);

C. window.routeEvents(Event.CLICK );

D. window.raiseEvents(Event.CLICK );

37. Which tag(s) can handle mouse events in Netscape?

A. <IMG>

B. <A>

C. <BR>

D. None of the above

38. ____________ is the tainted property of a window object.

A. Pathname

B. Protocol

C. Defaultstatus

D. Host

39. To enable data tainting, the end user sets the _________ environment variable.

A. ENABLE_TAINT

B. MS_ENABLE_TAINT

C. NS_ENABLE_TAINT

D. ENABLE_TAINT_NS

40. In JavaScript, _________ is an object of the target language data type that encloses an object of the source language.

A. a wrapper

B. a link

C. a cursor

D. a form

41. When a JavaScript object is sent to Java, the runtime engine creates a Java wrapper of type ___________

A. ScriptObject

B. JSObject

C. JavaObject

D. Jobject

42. _______ class provides an interface for invoking JavaScript methods and examining JavaScript properties.

A. ScriptObject

B. JSObject

C. JavaObject

D. Jobject

43. _________ is a wrapped Java array, accessed from within JavaScript code.

A. JavaArray

B. JavaClass

C. JavaObject

D. JavaPackage

44. A ________ object is a reference to one of the classes in a Java package, such as netscape.javascript .

A. JavaArray

B. JavaClass

C. JavaObject

D. JavaPackage

45. The JavaScript exception is available to the Java code as an instance of __________

A. netscape.javascript.JSObject

B. netscape.javascript.JSException

C. netscape.plugin.JSException

D. None of the above

46. To automatically open the console when a JavaScript error occurs which of the following is added to prefs.js?

A. user_pref(" javascript.console.open_on_error", false);

B. user_pref("javascript.console.open_error ", true);

C. user_pref("javascript.console.open_error ", false);

D.   user_pref("javascript.console.open_on_error", true);

47. To open a dialog box each time an error occurs, which of the following is added to prefs.js?

A. user_pref("javascript.classic.error_alerts", true);

B. user_pref("javascript.classic.error_alerts ", false);

C. user_pref("javascript.console.open_on_error ", true);

D. user_pref("javascript.console.open_on_error ", false);

48. The syntax of a blur method in a button object is ______________

A. Blur()

B. Blur(contrast)

C. Blur(value)

D. Blur(depth)

49. The syntax of capture events method for document object is ______________

A. captureEvents()

B. captureEvents(args eventType)

C. captureEvents(eventType)

D. captureEvents(eventVal)

50. The syntax of close method for document object is ______________

A. Close(doc)

B. Close(object)

C. Close(val)

D. Close()

Posted in: Interview Questions asp.net | Tags: client-side ajax javascript top 50 jsobject wrapper ns_enable_taint javaarray javaclass blur web browser navigator livewire

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