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Interview Questions and Answers for 'Qualitest' - 3 question(s) found - Order By Newest

 Q1. What are the benefits of JSON over XML ?Json
Anonymous
Ans. Lighter and faster than XML as on-the-wire data format

Object Representation - Information is presented in object notations and hence better understandable.

Easy to parse and conversion to objects for information consumption.

Support multiple data types - JSON supports string, number, array, boolean whereas XML data are all string.

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   Like      Discuss      Correct / Improve     json   markup language     QualiTest      intermediate        frequent

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Related Questions

  What is JSON ?
  What is the role of JSON.stringify ?
  Which function is used to convert a JSON text into an object ?
  Which data types are supported by JSON ?
  Which markup languages can be used in restful web services ?
 If we have to specify a collection of a particular information like List of addresses, How can we represent that in a JSON ?
 Can you explain JSON specification ?


Very frequently asked. Usually asked in different variants like Diff between StringBuffer , String Builder ; Difference between StringBuilder and String class; Choice between these classes etc.
  Q2. What is the difference between StringBuffer and String class ?Core Java
Anonymous
Ans. A string buffer implements a mutable sequence of characters. A string buffer is like a String, but can be modified. At any point in time it contains some particular sequence of characters, but the length and content of the sequence can be changed through certain method calls.

The String class represents character strings. All string literals in Java programs, such as "abc" are constant and implemented as instances of this class; their values cannot be changed after they are created.

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Related Questions

  Difference between == and .equals() ?
  Why is String immutable in Java ?
  Explain the scenerios to choose between String , StringBuilder and StringBuffer ?

or

What is the difference between String , StringBuilder and StringBuffer ?
  What are different ways to create String Object? Explain.
 How does making string as immutable helps with securing information ? How does String Pool pose a security threat ?
  Why Char array is preferred over String for storing password?
 How is string object immutable if we can concat a string to it ?
  What is StringJoiner ?
 Which of the following is false about main method ?

a. It should be declared public and static
b. it should have only 1 argument of type String array
c. We can override main method
d. We can overload main method
  Which String class does not override the equals() and hashCode() methods, inheriting them directly from class Object?


Very frequently asked. Usually difference between String,StringBuffer and StringBuilder is asked in different variations.
  Q3. Difference between StringBuffer and StringBuilder ?Core Java
Anonymous
Ans. StringBuffer is synchronized whereas StringBuilder is not.

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Related Questions

  Explain the scenerios to choose between String , StringBuilder and StringBuffer ?

or

What is the difference between String , StringBuilder and StringBuffer ?
  Which String class does not override the equals() and hashCode() methods, inheriting them directly from class Object?
  What is the difference between StringBuffer and String class ?
 Write a method it will return reverse of the string(with out using reverse method of String or StringBuffer)
  Which of the following class creates mutable objects ?
  Which of the following has been introduced with Java 8 ? a. StringBuffer b. StringBuilder c. StringFilter d. StringJoiner
 Can StringBuffer and StringBuilder in Java be inherited?




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