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- Question
How can we achieve singleton pattern in iOS?
- Correct Answer
- The Singleton design pattern ensures a class only has one instance, and provides a global point of access to it The class keeps track of its sole instance and ensures that no other instance can be created Singleton classes are appropriate for situations where it makes sense for a single object to provide access to a global resourceSeveral Cocoa framework classes are singletons They includeNSFileManager, NSWorkspace, NSApplication, and, in UIKit,UIApplication A process is limited to one instance of these classes When a client asks the class for an instance, it gets a shared instance, which is lazily created upon the first request
- 1. Exception handling is targeted at
Options- A. Compile time error
- B. Logical error
- C. Run time error
- D. All of the above Discuss
- 2. Which two method you need to implement for key Object in HashMap ? Discuss
- 3. What are Spring beans ? Discuss
- 4. Convert the expression ((A + B) * C ? (D ? E) ^ (F + G)) to equivalent Postfix notations.
Options- A. AC + B * DE - FG +^-
- B. AB + C * DE - FG + ^-
- C. AC + B* DE - FG -+ ^
- D. AB + C * DE - FG -+ ^ Discuss
- 5. What is Windows Server Backup? Discuss
- 6. How to declare select-option as a parameter? Discuss
- 7. Explain the difference between Template and Table ? Discuss
- 8. How do you put a message in the browser's status bar ?
Options- A. status("put your message here")
- B. window.status = "put your message here"
- C. statusbar = "put your message here"
- D. window.status("put your message here") Discuss
- 9. What happens if the list-style-type property is used on a non-list element like a paragraph? Discuss
- 10. What are Child Selectors ? Discuss
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Correct Answer: Run time error
Correct Answer: In order to use any object as Key in HashMap, it must implements equals and hashcode method in Java
Correct Answer: The Spring Beans are Java Objects that form the backbone of a Spring application They are instantiated, assembled, and managed by the Spring IoC container These beans are created with the configuration metadata that is supplied to the container Beans defined in spring framework are singleton beans There is an attribute in bean tag named "singleton" if specified true then bean becomes singleton and if set to false then the bean becomes a prototype bean By default it is set to true So, all the beans in spring framework are by default singleton beans
Correct Answer: AB + C * DE - FG + ^-
Correct Answer: Windows Server Backup is a feature released for the Windows 2008 that provides a number of solutions on backing up the data on your computer in case of a system failure or any other issue Windows Server Backup can backup a few files to a whole server The server backup is accessible through command lines and a management console
Correct Answer: SELECT-OPTIONS: specify or displayed on the selection screen for the user to enter values Parameters : dname like dept-dname Select-options: dname for dept-dname
Correct Answer: The difference between the table and template is that, table is a dynamic and template is a static
Correct Answer: window.status = "put your message here"
Correct Answer: Here the property will be ignored without having any effect on the paragraph
Correct Answer: A child selector is used when you want to match an element that is the child of another specific element The parent and child selectors are separated by spaces The following selector locates an unordered list element within a paragraph element and makes a text within that element bold p > ul {font-weight: bold;}
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