What will be printed by the following code: String s1 = new String("Welcome to Java"); String s2 = "Welcome to Java"; System.out.println(s1.equals(s2)); ?

true, s1 and s2 have the same content

it will cause compilation error

true, s1 and s2 refer to the same object

0, equals() method return integer

false, s2 is internal string - they refer different objects

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zlaya zaya 8 perguntas Atualizado em 6 mai 2017

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1A string is a sequence of [blank_start]characters[blank_end]. In many languages, strings are treated as an [blank_start]array[blank_end] of characters,
but in Java a string is an [blank_start]object[blank_end]
1. Abytes
2. Bcharacters
3. Cshorts
4. Darai
5. Earrai
6. Farray
7. Garray
8. Hclass
9. Iobject
10. Jsimple type
2You can create a string from an array of characters
1. AVerdadeiro
2. BFalso
3Does the following code change the contents of the string?

String s = "Java";
s = "HTML";
1. Ayes
2. Bno
4What will be printed by the following code:

String s1 = new String("Welcome to Java");
String s2 = "Welcome to Java";
System.out.println(s1.equals(s2)); ?
1. Ait will cause compilation error
2. Btrue, s1 and s2 have the same content
3. Ctrue, s1 and s2 refer to the same object
4. D0, equals() method return integer
5. Efalse, s2 is internal string - they refer different objects
5System.out.println("Welcome to Java".charAt(0));

result of the preceding code is: [blank_start]W[blank_end]
1. AW
6String s3 = s1.concat(s2) is the same as String s3 = s1 + s2;
1. AVerdadeiro
2. BFalso
7Which of the following methods return integer?
Explain what is each method for
1. AregionMatches()
2. BstartsWith()
3. CcompareToIgnoreCase()
4. Dsubstring()
8split() method returns a new string with blank characters trimmed on both sides
1. AVerdadeiro
2. BFalso

Descrição: Computer Science Quiz sobre Sem título, criado por zlaya zaya em 03-05-2017.
Autor: zlaya zaya
Idioma: English
Visualizações: 0
Histórico: Criado em 3 mai 2017 · atualizado em 6 mai 2017
Etiquetas: computer science
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