Pros and cons of JPA vs JDBC?
Senior
167
Java
14621
265
What are the types of JOIN?
Senior
166
What experience do you have with JDBC for interacting with databases?
Junior — Middle
166
Explain what unchecked exceptions are in programming
Junior — Middle
166
How is the operation of inserting an element into the central part of a doubly linked list evaluated in terms of complexity?
Junior — Middle
165
What is the difference between the data structures ArrayDeque and LinkedList used for organizing queues and stacks?
Junior — Middle
165
Task #2 What will be the result in Session #2? Connecting to a database with an empty table t Session #1 --------------------------- psql> BEGIN; -- T1 psql(T1)> INSERT INTO t(id,val) VALUES (1,'a'); -- no COMMIT psql(T1)> COMMIT; --------------------------- Session #2 --------------------------- psql(T2)> SELECT * FROM t; ---------------------------
Senior
165
Is it possible to determine the type of interaction based on the URL?
Junior — Middle
164
Explain the exception handling mechanism using try, catch, and finally blocks in programming.
Junior — Middle
164
What is the difference between @Bean and @Component annotations in Spring, and in what situations are they used?
Junior — Middle
164
Task #3 What will be the result in Session #1? Connecting to the database with table t with the line INSERT INTO t(id,val) VALUES (3,'c'); COMMIT; Session #1 ------------------------ psql> BEGIN TRANSACTION ISOLATION LEVEL REPEATABLE READ; -- T1 ------------------------ Session #2 ------------------------ psql(T2)> UPDATE t SET val='c2' WHERE id=3; COMMIT; ------------------------ Session #1 ------------------------ psql(T1)> SELECT id,val FROM t WHERE id=3 ------------------------
Senior
164
Regarding deadlines — how quickly are you ready to go live?
Senior
164
What does the method parallelStream do?
Senior
163
How can you ensure the creation of immutable objects in your code?
Junior — Middle
163
How is the access time complexity to an element by index evaluated in a linked list?
163
What is the time complexity of searching for an element in a HashMap by key?
162
What is the main purpose of using functional interfaces in programming?
Junior — Middle
161
What build system was used in your previous company?
Junior — Middle
161
How is the effectiveness of searching for an element within a HashMap structure evaluated?
Junior — Middle
161
//Find the first non-repeating element in an array of integers int[] arr = {9, 4, 9, 6, 7, 4, 5}; int n = ...;
Senior
160