Strings -Java Programming MCQ Questions and Answers Page-9 section-1

81.

What will be the output of the following Java program?

class output 
{
    public static void main(String args[])
    {
       String s1 = "Hello World";
       String s2 = s1.substring(0 , 4);
       System.out.println(s2);
    }
}

A. Hell

B. Hello

C. Worl

D. World

Answer & Solution Discuss in Board Save for Later

82.

What will be the output of the following Java code?

class output 
{
    public static void main(String args[])
    {
        char ch;
        ch = "hello".charAt(1);
        System.out.println(ch);
    }
}

A. h

B. e

C. l

D. o

Answer & Solution Discuss in Board Save for Later

83.

What will be the output of the following Java program?

class String_demo 
{
    public static void main(String args[])
    {
        int ascii[] = { 65, 66, 67, 68};
        String s = new String(ascii, 1, 3);
        System.out.println(s);
    }
}

A. ABC

B. BCD

C. CDA

D. ABCD

Answer & Solution Discuss in Board Save for Later

84.
Which of these is an incorrect statement?

A. String objects are immutable, they cannot be changed

B. String object can point to some other reference of String variable

C. StringBuffer class is used to store string in a buffer for later use

D. None of the mentioned

Answer & Solution Discuss in Board Save for Later

85.

What will be the output of the following Java program?

class output 
{
    public static void main(String args[])
    {             String s = "Hello World";
         int i = s.indexOf('o');
         int j = s.lastIndexOf('l');
         System.out.print(i + " " + j);

    }
}

A. 4 8

B. 5 9

C. 4 9

D. 5 8

Answer & Solution Discuss in Board Save for Later

86.

What is the string contained in s after following lines of Java code?

StringBuffer s new StringBuffer("Hello");
s.deleteCharAt(0);

A. Hell

B. ello

C. Hel

D. llo

Answer & Solution Discuss in Board Save for Later

87.

What will be the output of the following Java program?

class output 
{
   class output 
   {
     public static void main(String args[])
     {
        char c[]={'A', '1', 'b' ,' ' ,'a' , '0'};
        for (int i = 0; i < 5; ++i)
        {
               i++; 
               if(Character.isDigit(c[i]))
                   System.out.println(c[i]+" is a digit");
               if(Character.isWhitespace(c[i]))
                   System.out.println(c[i]+" is a Whitespace character");
               if(Character.isUpperCase(c[i]))
                   System.out.println(c[i]+" is an Upper case Letter");
               if(Character.isLowerCase(c[i]))
                   System.out.println(c[i]+" is a lower case Letter");
               i++;
        }
    }
}

A. a is a lower case Letter
is White space character

B. b is a lower case Letter
is White space character

C. 1 is a digit
a is a lower case Letter

D. a is a lower case Letter
0 is a digit

Answer & Solution Discuss in Board Save for Later

88.
Which of this method of class String is used to obtain a length of String object?

A. get()

B. Sizeof()

C. lengthof()

D. length()

Answer & Solution Discuss in Board Save for Later

89.

What will be the output of the following Java code?

class output 
{
    public static void main(String args[])
    {
        char c[]={'a', '1', 'b' ,' ' ,'A' , '0'};
        for (int i = 0; i < 5; ++i)
        {
               if(Character.isDigit(c[i]))
                   System.out.println(c[i]+" is a digit");
               if(Character.isWhitespace(c[i]))
                   System.out.println(c[i]+" is a Whitespace character");
               if(Character.isUpperCase(c[i]))
                   System.out.println(c[i]+" is an Upper case Letter");
               if(Character.isLowerCase(c[i]))
                   System.out.println(c[i]+" is a lower case Letter");
           i=i+3;
        }
    }
}

A. a is a lower case Letter
is White space character

B. b is a lower case Letter
is White space character

C. a is a lower case Letter
A is an upper case Letter

D. a is a lower case Letter
0 is a digit

Answer & Solution Discuss in Board Save for Later

90.

What will be the output of the following Java program?

class output 
{
    public static void main(String args[])
    { 
         StringBuffer c = new StringBuffer("Hello");
         c.delete(0,2);
         System.out.println(c);
    }
}

A. He

B. Hel

C. lo

D. llo

Answer & Solution Discuss in Board Save for Later

81.
What will be the output of the following Java program?

`class output { public static void main(String args[]) { String s1 = "Hello World"; String s2 = s1.substring(0 , 4); System.out.println(s2); } }`

Answer & Solution

82.
What will be the output of the following Java code?

`class output { public static void main(String args[]) { char ch; ch = "hello".charAt(1); System.out.println(ch); } }`

Answer & Solution

83.
What will be the output of the following Java program?

`class String_demo { public static void main(String args[]) { int ascii[] = { 65, 66, 67, 68}; String s = new String(ascii, 1, 3); System.out.println(s); } }`

Answer & Solution

84.
Which of these is an incorrect statement?

Answer & Solution

85.
What will be the output of the following Java program?

`class output { public static void main(String args[]) { String s = "Hello World"; int i = s.indexOf('o'); int j = s.lastIndexOf('l'); System.out.print(i + " " + j); } }`

Answer & Solution

86.
What is the string contained in s after following lines of Java code?

`StringBuffer s new StringBuffer("Hello"); s.deleteCharAt(0);`

Answer & Solution

Answer & Solution

88.
Which of this method of class String is used to obtain a length of String object?

Answer & Solution

Answer & Solution

90.
What will be the output of the following Java program?

`class output { public static void main(String args[]) { StringBuffer c = new StringBuffer("Hello"); c.delete(0,2); System.out.println(c); } }`

Answer & Solution

Read More Section(Strings)

Strings -Java Programming MCQ Questions and Answers

81. What will be the output of the following Java program? class output { public static void main(String args[]) { String s1 = "Hello World"; String s2 = s1.substring(0 , 4); System.out.println(s2); } }

Answer & Solution

82. What will be the output of the following Java code? class output { public static void main(String args[]) { char ch; ch = "hello".charAt(1); System.out.println(ch); } }

Answer & Solution

83. What will be the output of the following Java program? class String_demo { public static void main(String args[]) { int ascii[] = { 65, 66, 67, 68}; String s = new String(ascii, 1, 3); System.out.println(s); } }

Answer & Solution

84. Which of these is an incorrect statement?

Answer & Solution

85. What will be the output of the following Java program? class output { public static void main(String args[]) { String s = "Hello World"; int i = s.indexOf('o'); int j = s.lastIndexOf('l'); System.out.print(i + " " + j); } }

Answer & Solution

86. What is the string contained in s after following lines of Java code? StringBuffer s new StringBuffer("Hello"); s.deleteCharAt(0);

Answer & Solution

Answer & Solution

88. Which of this method of class String is used to obtain a length of String object?

Answer & Solution

Answer & Solution

90. What will be the output of the following Java program? class output { public static void main(String args[]) { StringBuffer c = new StringBuffer("Hello"); c.delete(0,2); System.out.println(c); } }

Answer & Solution

Read More Section(Strings)

81.
What will be the output of the following Java program?

`class output { public static void main(String args[]) { String s1 = "Hello World"; String s2 = s1.substring(0 , 4); System.out.println(s2); } }`

82.
What will be the output of the following Java code?

`class output { public static void main(String args[]) { char ch; ch = "hello".charAt(1); System.out.println(ch); } }`

83.
What will be the output of the following Java program?

`class String_demo { public static void main(String args[]) { int ascii[] = { 65, 66, 67, 68}; String s = new String(ascii, 1, 3); System.out.println(s); } }`

84.
Which of these is an incorrect statement?

85.
What will be the output of the following Java program?

`class output { public static void main(String args[]) { String s = "Hello World"; int i = s.indexOf('o'); int j = s.lastIndexOf('l'); System.out.print(i + " " + j); } }`

86.
What is the string contained in s after following lines of Java code?

`StringBuffer s new StringBuffer("Hello"); s.deleteCharAt(0);`

88.
Which of this method of class String is used to obtain a length of String object?

90.
What will be the output of the following Java program?

`class output { public static void main(String args[]) { StringBuffer c = new StringBuffer("Hello"); c.delete(0,2); System.out.println(c); } }`