16. Which boundary conditions lead to improved access time to an internal table?Note: There are 3 correct answers to this question.a) Left justified part of key for sorted tablesb) Fully qualified key for sorted tablesc) Index access for hashed tablesd) Left justified part of key for hashed tablese) Index access for standard tables 17. Which steps are needed when implementing the singleton concept for class instantiation with minimum coding?Note: There are 3 correct answers to this question.a) Define the instantiation of the class as private.b) Create an instance of the class in a static constructor.  c) Define the class as abstract.  d) Save the instance of the class in a static attribute.  e) Create an event that returns the instance of the class. 18. Which of the following tasks does the BADI implementing class perform?Note: Please choose the correct answer.a) Filteringb) Sequencingc) Insertingd) Deleting 19. What will happen at runtime when accessing a buffered table?  Note: Please choose the correct answer.a) All SELECT statements will read data from the buffer.b) If data is read from the table buffer, the existing indexes are not used.  c) Following an update to a buffered record, all table buffers in the system will be updated.  d) If table data is read using indexes, the table buffer will not be filled. 20. An executable ABAP program contains a standard selection screen and uses the event blocks AT SELECTION-SCREEN, AT SELECTION-SCREEN OUTPUT, INITIALIZATION, START-OF-SELECTION. In which sequence will ABAP runtime call these event blocks?Note: Please choose the correct answer.a) 1. AT SELECTION-SCREEN OUTPUT    2. INITIALIZATION    3. AT SELECTION-SCREEN    4. START-OF-SELECTIONb) 1. INITIALIZATION

    2. AT SELECTION-SCREEN    3. AT SELECTION-SCREEN OUTPUT    4. START-OF-SELECTIONc) 1. INITIALIZATION    2. AT SELECTION-SCREEN OUTPUT    3. AT SELECTION-SCREEN    4. START-OF-SELECTIONd) 1. INITIALIZATION    2. AT SELECTION-SCREEN OUTPUT    3. START-OF-SELECTION    4. AT SELECTION-SCREEN