Tag: programming languages

Questions Related to programming languages

Can a private method of a super class be declared in a sub class?

technology programming languages

  1. yes

  2. no

  3. cannot say

  4. none

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Correct Option: A

assuming all the variables are declared and initialied properly , will the below line compile? for (i=3,j=76;i>589;j++,i++){}
technology programming languages

  1. Yes will compile

  2. no doesnot compile

  3. changes have to be made in checking the variables

  4. none

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Correct Option: A

Using the "Super" keyword we can go one level up (T/F)
technology programming languages

  1. True

  2. False

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Correct Option: A

" ?: " is a conditional Operator (T/F)

technology programming languages

  1. True

  2. False

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Correct Option: A

Can final method be overridden?
technology programming languages

  1. True

  2. False

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Correct Option: B

Can you automatically convert long value into int , if the long value is small enough to fit into an int.

technology programming languages

  1. True

  2. False

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Correct Option: A

Can a subclass access the private values of the super class
technology programming languages

  1. No

  2. Yes

  3. Will have to use an instance

  4. None

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Correct Option: A

given x = y--; What will be true after execution?
technology programming languages

  1. x>y

  2. x

  3. x==y

  4. x++

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Correct Option: A

What is the output for the below code ? public class Test { public static void main(String... args) { Pattern p = Pattern.compile("a{3}b?c*"); Matcher m = p.matcher("aaab"); boolean b = m.matches(); System.out.println(b); } }
technology programming languages

  1. true

  2. Compile Error

  3. false

  4. NullPointerException

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Correct Option: A
Explanation:

To solve this question, the user needs to know the basics of regular expressions and the use of the Pattern and Matcher classes in Java. The given code compiles a regular expression pattern and matches it with the string "aaab". The regular expression pattern "a{3}b?c*" means that the pattern should start with three "a" characters, optionally followed by a single "b" character, and then zero or more "c" characters.

The Matcher.matches() method tries to match the entire input sequence against the pattern. If the entire input sequence matches the pattern, the method returns true; otherwise, it returns false.

In this case, the input sequence "aaab" matches the pattern "a{3}b?c*", because it starts with three "a" characters and ends with zero "c" characters. The optional "b" character is present in the input sequence, but it is not required to match the pattern.

Therefore, the output of the code will be:

The Answer is: A (true)

What is the output for the below code ? public class Test extends Thread{ static String sName = "good"; public static void main(String argv[]){ Test t = new Test(); t.nameTest(sName); System.out.println(sName); } public void nameTest(String sName){ sName = sName + " idea "; start(); } public void run(){ for(int i=0;i < 4; i++){ sName = sName + " " + i; } } }
technology programming languages

  1. good

  2. good idea

  3. good idea good idea

  4. good 0 good 0 1

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Correct Option: A