46. In which file database table configuration is stored?

1. 1. .hbm

   
   
   

   2. .sql

   
   
   

   3. .ora

   
   
   

   4. .dbm

   
   
   

   5. None of these

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   Database table configuration is stored in .hbm file.

---

47. Which of the following is not an advantage of Hibernate Criteria API?

1. 1. Can add conditions while fetching results

   
   
   

   2. Allows to fetch only selected columns of result

   
   
   

   3. Allows to use aggregate functions

   
   
   

   4. Cannot order the result set

   
   
   

   5. None of these

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   addOrder() can be used for ordering the results.

---

---

48. What should the return type of method where there is no return value?

1. 1. Empty collection

   
   
   

   2. Null

   
   
   

   3. Empty String

   
   
   

   4. Singleton collection

   
   
   

   5. None of these

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   Returning Empty collection is a good practice. It eliminates chances of unhandled null pointer exceptions.

---

49. What data structure should be used when number of elements is fixed?

1. 1. Set

   
   
   

   2. Vector

   
   
   

   3. Array

   
   
   

   4. Array list

   
   
   

   5. None of these

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   Array list has variable size. Array is stored in contiguous memory. Hence, reading is faster. Also, array is memory efficient.

---

---

50. Which of the below is true about java class structure?

1. 1. The class should only contain those attribute and functionality which it should; hence keeping it short

   
   
   

   2. The class attributes and methods should be public

   
   
   

   3. The class should have thousands of lines of code

   
   
   

   4. The class name should start with lowercase

   
   
   

   5. None of these

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   Class name should always start with upper case and contain those attribute and functionality which it should (Single Responsibility Principle); hence keeping it short. The attributes should be usually private with get and set methods.

---