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MCQs

Total Questions : 19 | Page 1 of 2 pages
Question 1. The output of the following fraction of code is
public class Test{
public static void main(String args[]){
String s1 = new String("Hello");
String s2 = new String("Hellow");
System.out.println(s1 = s2);
}
}
  1.    Hello
  2.    Hellow
  3.    Compilation error
  4.    Throws an exception
  5.    None of these
 Discuss Question
Answer: Option B. -> Hellow
Question 2. What will be the output of the following program code?
class LogicalCompare{
public static void main(String args[]){
String str1 = new String("OKAY");
String str2 = new String(str1);
System.out.println(str1 == str2);
}
}
  1.    true
  2.    false
  3.    0
  4.    1
  5.    Displays error message
 Discuss Question
Answer: Option B. -> false
Question 3. What will be the output of the following program?
public class Test{
public static void main(String args[]){
String s1 = "java";
String s2 = "java";
System.out.println(s1.equals(s2));
System.out.println(s1 == s2);
}
}
  1.    false true
  2.    false false
  3.    true false
  4.    true true
 Discuss Question
Answer: Option D. -> true true
Question 4. Determine output:
public class Test{
public static void main(String args[]){
String s1 = "SITHA";
String s2 = "RAMA";
System.out.println(s1.charAt(0) > s2.charAt(0));
}
}
  1.    true
  2.    false
  3.    0
  4.    Compilation error
  5.    Throws Exception
 Discuss Question
Answer: Option A. -> true
Question 5. What could be output of the following fragment of code?
public class Test{
public static void main(String args[]){
String x = "hellow";
int y = 9;
System.out.println(x += y);
}
}
  1.    Throws an exception as string and int are not compatible for addition
  2.    hellow9
  3.    9hellow
  4.    Compilation error
  5.    None of these
 Discuss Question
Answer: Option B. -> hellow9
Question 6. ToString() method is defined in
  1.    java.lang.String
  2.    java.lang.Object
  3.    java.lang.util
  4.    None of these
 Discuss Question
Answer: Option B. -> java.lang.Object
Question 7. What will be the output?
String str1 = "abcde";
System.out.println(str1.substring(1, 3));
  1.    abc
  2.    bc
  3.    bcd
  4.    abcd
  5.    None of these
 Discuss Question
Answer: Option B. -> bc
Question 8. The String method compareTo() returns
  1.    true
  2.    false
  3.    an int value
  4.    1
  5.    -1
 Discuss Question
Answer: Option C. -> an int value
Question 9. What is the output of the following println statement?
String str1 = "Hellow";
System.out.println(str1.indexOf('t'));
  1.    true
  2.    false
  3.    1
  4.    -1
  5.    0
 Discuss Question
Answer: Option D. -> -1
Question 10. What will be the output of the following program?
public class Test{
public static void main(String args[]){
String str1 = "one";
String str2 = "two";
System.out.println(str1.concat(str2));
}
}
  1.    one
  2.    two
  3.    onetwo
  4.    twoone
  5.    None of these
 Discuss Question
Answer: Option C. -> onetwo

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