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basic knowledge of electronics what do you know about flex

Object Oriented Programming & Java Questions 1)Explain OOPS concept? 2)What is Inheritance? 2.1)What is abstraction? 2.2)What is polymorphism (Method Overloading and Method overriding)? 2.3)What is encapsulation? 3)Can java supports multiple inheritance?(Ans:No) 4)What are the data types present in Java and C? 5)What are control statements?(Ans:Loops while,for,do while) 6)Difference between while , for and do while loop? 7)What is switch statement? He asked to give output to two code snippets also they are 1)private static void main(String args[]){ System.out.println("Hello World!"); } ouput: Runtime error 2) public static void main(String args[]){ for(int i=1;i<3;i++){ switch(i){ case 0: break; case 1: s.o.p("1"); break; case 2: s.o.p("2"); break; case 3: s.o.p("3"); break; } } s.o.p("Done"); } output: 1 2 Done DBMS 1)What is DBMS? 2)What are joins? 3)Explain joins? 4)Difference between delete and truncate commands? 5)What is roll back command? 6)What are primary,foreign keys? 7)Difference between primary and foreign keys? 8)ACID properties also important and Normalization also SDLC 1)What is SDLC? 2)What are faces in SDLC? 3)What is testing? 4)What are different types of testing? HR questions 1)Why do you want to join Infosys? 2)What do you know about Infoys? 3)Are you relocatable?