Tag: web technology

Quizzes (208) Questions (4176)

Questions Related to web technology

Multiple choice technology web technology

Which statement(s) are true? (Choose all that apply.)

  1. Cohesion is the OO principle most closely associated with hiding implementation details

  2. Cohesion is the OO principle most closely associated with making sure that classes know about other classes only through their APIs

  3. Cohesion is the OO principle most closely associated with making sure that a class is designed with a single, well-focused purpose

  4. Cohesion is the OO principle most closely associated with allowing a single object to be seen as having many types
Reveal answer Fill a bubble to check yourself
C Correct answer
Full explanation
Multiple choice technology web technology

Given: 3. class Mammal { 4. String name = "furry "; 5. String makeNoise() { return "generic noise"; } 6. } 7. class Zebra extends Mammal { 8. String name = "stripes "; 9. String makeNoise() { return "bray"; } 10. } 11. public class ZooKeeper { 12. public static void main(String[] args) { new ZooKeeper().go(); } 13. void go() { 14. Mammal m = new Zebra(); 15. System.out.println(m.name + m.makeNoise()); 16. } 17. } What is the result?

  1. furry bray

  2. stripes bray

  3. furry generic noise

  4. stripes generic noise

  5. Compilation fails

  6. An exception is thrown at runtime
Reveal answer Fill a bubble to check yourself
A Correct answer
Full explanation
Multiple choice technology web technology

Given: 3. import java.io.*; 4. public class ReadingFor { 5. public static void main(String[] args) { 6. String s; 7. try { 8. FileReader fr = new FileReader("myfile.txt"); 9. BufferedReader br = new BufferedReader(fr); 10. while((s = br.readLine()) != null) 11. System.out.println(s); 12. br.flush(); 13. } catch (IOException e) { System.out.println("io error"); } 16. } 17. } And given that myfile.txt contains the following two lines of data: ab cd What is the result?

  1. ab

  2. abcd

  3. ab cd

  4. a b c D

  5. Compilation fails
Reveal answer Fill a bubble to check yourself
E Correct answer
Full explanation
Multiple choice technology web technology

Given: 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() + " "); } Which statements are true?

  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
Reveal answer Fill a bubble to check yourself
E Correct answer
Full explanation