Lets do more questions in java for banking domain companies preparations -Set A:
1) There are
two table t1 and t2 , t2 contains null element . will the inner
join contains the null elements as well.
2) There is
class A{
A(){
A();
}
Can constructor
call it recursively?
3) There is
class A {
Functionality();
}
Class B extends
class A{
Functionality();
}
Class a
functionaly has some code ( common + different ) and class b has
some code( common + different ) . without using interface / class .
we don’t want to use the common functionality in the derived class.
4) Design
parking lot with design patterns using motorcycle( 1 spot ) , car (
2spot) , bus ( 3 spot) . What will happen when the spot of
motorcycle get exhausted . how will you accommodate further
motorcycle.
5) There are
two table t1 and t2 . t1 contains composite primary key ( a,b,c ) .
can foreign key be allowed on single column ( a ) .
6) interface
has default method . how to call that method from the derived class?
7) Can we
call abstract class method from the derived class?
8) What is
super key , candidate key , composite key?
9) What is
composition?
10) With
keyword in the sql?
11) Use enum in
switch case . what does enumConstant.name() return ?
12) Integer pa
= null.
Int i = pa;
What is the value
of i ?
13) Class Test
{
int a , b;
static sum(){
multiply();
}
Multiply(){
}
}
Will it work?
14) Internal
working of concurrenthashmap? Why hashmap can have null and
concurrenthashmap is not null?
15) Try block
with three catch1 , catch2, catch3 . how will you throw exception
from catch1 and should be caught in catch3.
16) Whats the
new feature in exception class of java 1.8 ?
17) String s =
NULL ( capital without quotes ). What will happen?
18) How to
create immutable object in java?
19) How to
handle diamond problem having two interface with same default method
?
20) What will
concurrenthashmap return when we call clear() method simultaneously
with threads( reading and writing ) ?
21) How will
you handle high memory issue in java application. Please provide all
the steps?
Set B:
1) Overview and
architecture of previous project.
2) Having a list
of 0s and non-zeros like -
7 0 2 8 0 0 5 0
Algo for getting
below output
7 2 8 5 0 0 0 0
Scenario A -
using same array
Scenario B -
using different array.
3) Intra-day
stock prices are present in a list -
e.g. [ 30, 40,
75, 60, 100, 10, 25, 65, .....]
Algo to find the
buy and selling values in order to make maximum profit.
Buy order should
be before Sell order.
Scenario A - You
can buy stock only once and sell only once.
Scenario B - You
can buy and sell as many times as possible.
4) A module
matches the buy and sell orders to carry out a transaction whenever
price matches.
We have to add
another module which keeps track of the total traded value (in
Dollars) of the stock in the day till current time.
What will be the
features of the new module. (In terms of concurrency)
5) Messaging
Techniques - Synchronous / Asynchronous.
Features and
usage of JMS, Web Services, REST, JSON, XML, etc.
6) I we have to
design an email server. What will the different classes and its
attributes.
(Mail, User,
Views, DLs, Attachments and relationship between them.)
7) 2 database
Tables-
Employee (Name,
Dept_ID, Salary),
and
Dept(Dept_Name, Dept_ID)
SQL query to get
the name of employees who have salary more than the average salary in
their department.
8) Some questions
related to Agile methodology - Capacity planning, Sprint Meetings,
Task Allocation, etc.
9) Advantages of
Spring Boot over normal Spring Applications.
Set C:
1. What is
Encapsulation
2. Composition vs
Inheritence
3. Any example in
which we can use both composition and inheritence
4. What is
polymorphism
5. What do mean
by final
6. How we can
override final method
7. Can we call
non static method from static method. If not then what we will have
do to call non static method from static method.
8. How we call
static method from non static method
9. Do constructor
can have return type
10. Can we call
constructor from another constructor
11. Static String
variable in Interface and it’s accessibility through
implementing/Extending class
12. Java 8
default method.
13. Difference
between abstract class and interface after java8 default feature
14. Diamond
problem
15. What do you
mean by immutable object. How can we create immutable object
16. What if use
clone method to clone object while creating immutable object
17. What happen
if we clone string
18. try with 3
catch, if first catch throws exception then what will happen
19. What is
transient
20. What is
volatile
21. Swap string
without any third variable
22. What are
marker interfaces
23. What is inner
join.
24. Difference
between primary key and unique key
25. Why
concurrenthaspmap not allow null key. What happens if 3 threads are
reading concurrenhashmap and we call clear method. How clear works
internally
I hope all questions are relevant to banking domain companies interview questions in Java.
Feel free to comment in comment box for any query or concerns.
Nice collection!!
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