MySQL interview questions part 20
MySQL interview questions part 20
Take as many assements as you can to improve your validate your skill rating
Total Questions: 20
1. Which method in the code below is single level inherited? class A { protected int a, b; public: void show() { cout<<a<<b; } }; class B: public A { public: void disp() { cout<<a++<<b++; } }; class C: private A, public B { void avg() { cout<<(a+b)/2; } };
Correct Answer is : TRUE
2. If single level inheritance is used and an abstract class is created with some undefined functions, can its derived class also skip some definitions?
Correct Answer is : TRUE
3. Which among the following is false for single level inheritance?
Correct Answer is : relay log
4. Which concept will result in derived class with more features (consider maximum 3 classes)?
Correct Answer is : ddl log
5. Single level inheritance is safer than _____________
Correct Answer is : 4 GB
6. Which language doesn’t support single level inheritance?
Correct Answer is : writes
7. Output of following program? class A { protected: int a,b; public: void disp() { cout<<a<<b; } }; class B:public A { int x,y; };
Correct Answer is : 3
8. Output of following program? class A { float sal=40000; } class B extends A { int salBonus=10000; public static void main(String args[]) { B p=new B(); System.out.println("B salary is:"+p.sal); System.out.println("Bonus of B is:"+p.bonus); } }
Correct Answer is : memory
9. Single level inheritance will be best for___________
Correct Answer is : table_cache
10. Which constructor will be called first from the classes involved in single inheritance from object of derived class?
Correct Answer is : mysqldump
11. If base class contains 2 nested classes, will it be possible to implement single level inheritance?
Correct Answer is : Falcon
12. Which among the following best defines static variables members?
Correct Answer is : 3
13. Which keyword should be used to declare static variables?
Correct Answer is : –delay-key-write
14. Any changes made to static data member from one member function _____________
Correct Answer is : –silent
15. Which is the correct syntax for declaring static data member?
Correct Answer is : $dbh
16. The static data member ______________________
Correct Answer is : $rc
17. The syntax for defining the static data members is:
Correct Answer is : DROP INDEX
18. If static data members have to be used inside a class, those member functions _______________
Correct Answer is : $a[0].
19. The static data member __________________________
Correct Answer is : TRUE
20. Which among the following is correct syntax to access static data member without using member function?
Correct Answer is : ->
