Tag: programming languages

Questions Related to programming languages

The Files tnsnames.ora, listener.ora and sqlnet.ora are available at the location ?
technology programming languages

  1. $Oracle_home/network/administrator

  2. $Oracle_home/db/administrator

  3. $Oracle_home/network/admin

  4. $Oracle_home/db/admin

Show answer
Correct Option: C

Maximum number of datafiles per DB are ?
technology programming languages

  1. 128,000

  2. 64,000

  3. 32,000

  4. 16,000

Show answer
Correct Option: B

import java.util.regex.; class Regex2 { public static void main(String[] args) { Pattern p = Pattern.compile(args[0]); Matcher m = p.matcher(args[1]); boolean b = false; while(b = m.find()) { System.out.print(m.start() + m.group()); } } } And the command line: java Regex2 "\d" ab34ef

technology programming languages

  1. 234

  2. 334

  3. 2334

  4. 0123456

  5. 01234456

  6. 12334567

Show answer
Correct Option: E

AI Explanation

To answer this question, let's analyze the given code and the command line arguments.

The code uses regular expressions to search for a pattern in a given input string. The command line argument args[0] is used to define the regular expression pattern, and args[1] is the input string on which the pattern is matched.

In this case, the regular expression pattern is \d*, which matches zero or more consecutive digits.

The input string is "ab34ef".

The code uses a Matcher object m to find matches of the pattern in the input string. The find() method of the Matcher class is used in a while loop to find all occurrences of the pattern.

Inside the while loop, the code prints the start index of each match (m.start()) followed by the matched substring (m.group()).

Let's go through each option to understand why it is correct or incorrect:

Option A) 234 - This option is incorrect because it only includes one occurrence of the pattern. The code will find multiple occurrences of the pattern.

Option B) 334 - This option is incorrect because it only includes one occurrence of the pattern. The code will find multiple occurrences of the pattern.

Option C) 2334 - This option is incorrect because it only includes one occurrence of the pattern. The code will find multiple occurrences of the pattern.

Option D) 0123456 - This option is incorrect because it includes all the digits in the input string, but it doesn't include the non-digit characters. The code will find multiple occurrences of the pattern.

Option E) 01234456 - This option is correct because it includes all the digits in the input string, as well as the non-digit characters. The code will find multiple occurrences of the pattern and print the start index followed by the matched substring for each occurrence.

Option F) 12334567 - This option is incorrect because it doesn't include the non-digit characters in the input string. The code will find multiple occurrences of the pattern.

The correct answer is E. This option is correct because it includes all the digits in the input string, as well as the non-digit characters. The code will find multiple occurrences of the pattern and print the start index followed by the matched substring for each occurrence.

  1. import java.io.*; 4. class Vehicle { } 5. class Wheels { } 6. class Car extends Vehicle implements Serializable { } 7. class Ford extends Car { } 8. class Dodge extends Car { 9. Wheels w = new Wheels(); 10. } Instances of which class(es) can be serialized? (Choose all that apply.)
technology programming languages

  1. Car

  2. Ford

  3. Dodge

  4. Wheels

  5. Vehicle

Show answer
Correct Option: A,B

AI Explanation

To answer this question, let's analyze each class and determine whether instances of these classes can be serialized:

Option A) Car - This option is correct because the class Car extends Vehicle and implements Serializable. When a class implements the Serializable interface, it indicates that instances of that class can be serialized.

Option B) Ford - This option is correct because the class Ford extends Car. Since Car can be serialized, any subclass of Car, such as Ford, can also be serialized.

Option C) Dodge - This option is incorrect because the class Dodge extends Car, which can be serialized. Therefore, instances of the Dodge class can also be serialized.

Option D) Wheels - This option is incorrect because the class Wheels does not implement the Serializable interface. Therefore, instances of the Wheels class cannot be serialized.

Option E) Vehicle - This option is incorrect because the class Vehicle does not implement the Serializable interface. Therefore, instances of the Vehicle class cannot be serialized.

The correct answers are options A (Car) and B (Ford) because instances of these classes can be serialized.

public static void main(String[] args) { // INSERT DECLARATION HERE for (int i = 0; i <= 10; i++) { List row = new ArrayList(); for (int j = 0; j <= 10; j++) row.add(i * j); table.add(row); } for (List row : table) System.out.println(row); } Which statements could be inserted at // INSERT DECLARATION HERE to allow this code to compile and run? (Choose all that apply.)

technology programming languages

  1. List> table = new List>();

  2. List> table = new ArrayList>();

  3. List> table = new ArrayList>();

  4. List table = new List();

  5. List table = new ArrayList();

  6. List table = new ArrayList();

Show answer
Correct Option: B

public static void before() { Set set = new TreeSet(); set.add("2"); set.add(3); set.add("1"); Iterator it = set.iterator(); while (it.hasNext()) System.out.print(it.next() + " "); }

technology programming languages

  1. The before() method will print 1 2

  2. The before() method will print 1 2 3

  3. The before() method will print three numbers, but the order cannot be determined

  4. The before() method will not compile

  5. The before() method will throw an exception at runtime

Show answer
Correct Option: E
  1. import java.util.*; 4. class Dog { int size; Dog(int s) { size = s; } } 5. public class FirstGrade { 6. public static void main(String[] args) { 7. TreeSet i = new TreeSet(); 8. TreeSet d = new TreeSet(); 9. 10. d.add(new Dog(1)); d.add(new Dog(2)); d.add(new Dog(1)); 11. i.add(1); i.add(2); i.add(1); 12. System.out.println(d.size() + " " + i.size()); 13. } 14. }
technology programming languages

  1. 1 2

  2. 2 2

  3. 2 3

  4. Compilation fails

  5. Exception occurs at runtime

Show answer
Correct Option: E

How do you design a website with multilingual support in ASP.NET?
technology programming languages

  1. True

  2. False

Show answer
Correct Option: A

How many sections are there in data division
technology programming languages

  1. 4

  2. 6

  3. 3

  4. 2

Show answer
Correct Option: B

which of the following is mandatory for cobol program.

technology programming languages

  1. identification division and program id

  2. identification division and data division

  3. identification division and report section

  4. identification division linkage section and program id

Show answer
Correct Option: A