Tag: web technology

Questions Related to web technology

Given: 12. public class AccountManager { 13. private Map accountTotals = new HashMap(); 14. private int retirementFund; 15. 16. public int getBalance(String accountName) { 17. Integer total = (Integer) accountTotals.get(accountName); 18. if (total == null) 19. total = Integer.valueOf(0); 20. return total.intValue(); 21. } 23. public void setBalance(String accountName, int amount) { 24. accountTotals.put(accountName, Integer.valueOf(amount)); 25. } 26. } This class is to be updated to make use of appropriate generic types, with no changes in behavior (for better or worse). Which of these steps could be performed? (Choose three.)

technology web technology

  1. Replace line 13 with private Map accountTotals = new HashMap();

  2. Replace line 13 with private Map accountTotals = new HashMap();

  3. Replace line 13 with private Map> accountTotals = new HashMap>();

  4. Replace lines 17–20 with int total = accountTotals.get(accountName); if (total == null) total = 0; return total;

  5. Replace lines 17–20 with Integer total = accountTotals.get(accountName); if (total == null) total = 0; return total;

  6. Replace line 24 with accountTotals.put(accountName, amount);

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Correct Option: B,E,F

Given a method declared as public static List process(List nums) A programmer wants to use this method like this // INSERT DECLARATIONS HERE output = process(input); Which pairs of declarations could be placed at // INSERT DECLARATIONS HERE to allow the code to compile? (Choose all that apply.)
technology web technology

  1. ArrayList input = null; ArrayList output = null;

  2. ArrayList input = null; List output = null;

  3. ArrayList input = null; List output = null;

  4. List input = null; ArrayList output = null;

  5. List input = null; List output = null;

  6. List input = null; List output = null;

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Correct Option: B,E,F

Given: 3. import java.util.*; 4. public class Mixup { 5. public static void main(String[] args) { 6. Object o = new Object(); 7. // insert code here 8. s.add("o"); 9. s.add(o); 10. } 11. } And these three fragments: I. Set s = new HashSet(); II. TreeSet s = new TreeSet(); III. LinkedHashSet s = new LinkedHashSet(); When fragments I, II, or III are inserted, independently, at line 7, which are true? (Choose all that apply.)
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  1. Fragment I compiles

  2. Fragment II compiles

  3. Fragment III compiles

  4. Fragment I executes without exception

  5. Fragment II executes without exception

  6. Fragment III executes without exception

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Correct Option: A,B,C,D,F

class C{ int i; public static void main (String[] args) { int i; //1 private int a = 1; //2 protected int b = 1; //3 public int c = 1; //4 public System.out.println(a+b+c); //5 } }
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  1. compiletime error at lines 1,2,3,4,5

  2. compiletime error at lines 2,3,4,5

  3. compiletime error at lines 2,3,4

  4. No error

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Correct Option: B

Base products are installed separately.

technology web technology

  1. True

  2. False

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Correct Option: A

What are JSP scripting elements ?
technology web technology

  1. declarations

  2. scriptlets

  3. expressions

  4. All of the above

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Correct Option: D

How many implicit objects in jsp?

technology web technology

  1. 4

  2. 7

  3. 9

  4. 8

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Correct Option: C

What are the kinds of comments in JSP?
technology web technology

  3. Both a and b

  4. None of the above

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Correct Option: C

What are the life cycle methods in jsp?

technology web technology

  1. jspInit()

  2. jspservice()

  3. jspDestroy()

  4. All of the above

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Correct Option: D

How many types of text formats in jsp?

technology web technology

  1. Static Content

  2. Dynamic content

  3. Both a and b

  4. None of the above

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Correct Option: C