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Interview Questions and Answers for 'Char' - 16 question(s) found - Order By Newest | ||||
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Ans. Its an anonymous method without any declaration. Lambda Expression are useful to write shorthand Code and hence saves the effort of writing lengthy Code. It promotes Developer productivity, Better Readable and Reliable code. | ||||
Sample Code for lambda | ||||
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Like Discuss Correct / Improve  java   java8   lambda expression   architecture Asked in 58 Companies expert   frequent | ||||
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Ans. A Stream is an abstraction that either produces or consumes information. There are two types of Streams : Byte Streams: Provide a convenient means for handling input and output of bytes. Character Streams: Provide a convenient means for handling input & output of characters. Byte Streams classes: Are defined by using two abstract classes, namely InputStream and OutputStream. Character Streams classes: Are defined by using two abstract classes, namely Reader and Writer. | ||||
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Like Discuss Correct / Improve  java   file io   streams   byte stream   character stream  file handling Asked in 3 Companies | ||||
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Ans. Unicode requires 16 bits and ASCII require 7 bits. Although the ASCII character set uses only 7 bits, it is usually represented as 8 bits. UTF-8 represents characters using 8, 16, and 18 bit patterns. UTF-16 uses 16-bit and larger bit patterns. | ||||
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Like Discuss Correct / Improve  character coding   ascii   unicode   utf | ||||
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Ans. JSON is "JavaScript Object Notation", primarily used for client-server or server-server communication. Its a much lighter and readable alternative to XML. JSON is language independent and is easily parse-able in all programming languages. | ||||
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Like Discuss Correct / Improve  json   markup language   client server communication Asked in 26 Companies basic   frequent | ||||
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Ans. The ascii value of a i.e 97 | ||||
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Like Discuss Correct / Improve  character  ascii | ||||
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Ans. It will result in compilation error as primitive char cannot be casted to Integer object, alternatively we can cast it to primitive int like following System.out.println((int)'a'); | ||||
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Like Discuss Correct / Improve  character  ascii | ||||
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Ans. 65 to 90 for capital case alphabets 97 to 122 for lower case alphabets | ||||
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Like Discuss Correct / Improve  ascii  character  char | ||||
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Ans. A way of encoding characters as binary numbers. The Unicode character set includes characters used in many languages, not just English. Unicode is the character set that is used internally by Java. | ||||
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Like Discuss Correct / Improve  java   character encoding   unicode   architecture | ||||
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Ans. 16 bits | ||||
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Like Discuss Correct / Improve  java   character coding   character encoding | ||||
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Ans. Multi Level Inheritance is multi level hierarchy of classes. Here is the example - http://www.buggybread.com/2015/09/java-se-class-diagram-classes-that_603.html Class RoleList extends ArrayList which in turn extends AbstractList which in turn extends AbstractCollection. | ||||
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Like Discuss Correct / Improve  multilevel inheritance  object oriented programming (oops)  oops concepts  inheritance  object oriented programming (oops)  oops concepts  oops concepts Asked in 3 Companies basic | ||||
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Ans. public class BuggyBread { public static void main(String args[]) { Map<Character, Integer> countMap = new HashMap(); String str = "hello world"; for (char character : str.toCharArray()) { if (countMap.containsKey(character)) { countMap.put(character, countMap.get(character) + 1); } else { countMap.put(character, 1); } } System.out.println(countMap); } } | ||||
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Like Discuss Correct / Improve  String  Code  Coding  Character Asked in 1 Companies | ||||
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Ans. char is a primitive data type. String is a class. Char is a wrapper class for primitive char. | ||||
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Like Discuss Correct / Improve  char  string  data type Basic | ||||
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Ans. We can use StringBuilder. StringBuilder accepts char as the argument for it's constructor. new StringBuilder('').toString(); | ||||
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Like Discuss Correct / Improve  convert char to String  char  String | ||||
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Ans. 1. We can compare the ascii value of the character. Ascii for Capital case character is from 65 to 90. 2. We can compare to see if lowerCase of the character is not equal to character itself. For example - if character is 'a' the following code new StringBuilder(char).toString().toLowerCase().equals(new StringBuilder(char) will return true and hence char is lower case if character is 'A' the following code new StringBuilder(char).toString().toLowerCase().equals(new StringBuilder(char) will return false and hence char is upper case | ||||
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Like Discuss Correct / Improve  check upper case character  character | ||||
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Ans. There is a method toCharArray() within String class that can be used to convert string to char array. string.toCharArray(); String class has an argument constructor that takes a char array and create a string new String(charArray); | ||||
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Like Discuss Correct / Improve  string  char array | ||||
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Ans. String has an argument constructor that take char array as argument and creates a string. There is no constructor available with String that takes in a character and creates a String. We can use StringBuilder which has a char argument constructor. | ||||
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Like Discuss Correct / Improve  character  char  char array  String  char to String  char array to String | ||||