TIAA Interview Experience -Java Back Backend Developer (3+ years Experience)

Round 1:  I was interviewed on Week Days, so there was no company presentation and written test, i was there for round 1 F2F interview,  

Q1. The very first question was tell me about  “FrameTech” which you use in you current project, i was initially confused with the term “FrameTech”, he meant the Frameworks and Technology used in current project. 

Q2. What do you know about Exceptions in java, How do we create user-defined checked and Unchecked Exceptions, if you are designing your own framework which user-defined exception(checked/unchecked) you implement. 

Q3. Why is String immutable?, How will you design your own immutable class? 

Q4. How does hashCode() works, How HashMap works internally, when using user-defined class object as a key in HashMap what care you need to take? 

Q4. Write code to print Prime numbers in the given range, after writing the code he was more interested efficiency and optimization. 

Q5. Write code to find whether given String str1 is present in String2 

Q6. What are annotations available in Spring, What are bean scopes available in Spring, what if we have scenario 

like Class A { 
class B ; //composition is used 
} 

if beans of Class A are of scope “Singleton” and beans of class B are of “Prototype” scope, then how may references will be returned and what will he the out-put of below statement 

A obj1 = context.getBean(A.class); 
A Obj2 = context.getBean(A.class) 
sysout(obj1 == obj2) ; // True OR False ? 

Q7. Why string are immutable? how will you make your own class immutable? what care you need to take if your class contains reference of other class? 

Q8. Method Overriding with Exception Handling, 

Ex – Class Parent{ 

public void m1() Throws Exception{ 

//m1 
} 
} 

Class Child extends Parent{ 
public void m1() { 
} 
} 

He asked me, how will you handle the exception for overridden method? 

Q9. class A{ 
public void m1(){ sop(“inside m1 of A); } 
} 

class B{ 
public void m1(){ sop(“inside m1 of B); } 
main(){ 
A obj = new B(); 
obj.m1(); // which method will be called? 
} 
} 

These were the questions i was asked, i was able to answer most of them, but they were looking for somebody who have worked on Spring live project, so i was asked to leave for the day.Hope this experience will help you Guys, Thank You.