Java

14605

Savollar14605

Oqim yetishmovchiligi nima (starvation)?

Senior

IT One

170

JOIN turlari qanday?

Senior

IT One

169

Vazifa #2 Session #2 da qanday natija bo'ladi? Bo'sh jadval t bilan ma'lumotlar bazasiga ulanish Sessiya #1 --------------------------- psql> BEGIN; -- T1 psql(T1)> INSERT INTO t(id,val) VALUES (1,'a'); -- COMMIT qilinmagan psql(T1)> COMMIT; --------------------------- Session #2 --------------------------- psql(T2)> SELECT * FROM t; ---------------------------

Senior

IT One

169

Git'da merge va rebase o'rtasidagi farq nima? Qachon foydalanish yaxshiroq?

Senior

IT One

168

URL asosida interaksiya turini aniqlash mumkinmi?

Junior — Middle

IT One

168

Springda @Bean va @Component annotatsiyalari o'rtasidagi farq nima va qaysi holatlarda ishlatiladi?

Junior — Middle

СБЕР

IT One

Альфа-Банк+2

168

parallelStream metodi nima qiladi?

Senior

IT One

167

//Ikki bean berilgan. m1 metodida uchinchi takrorlashda istisno yuz berdi. Ma'lumotlar bazasida nechta yozuv bo'ladi? public class BeanA() { private BeanB b; @Transactional public void m1(List<Integer> list) { for (Integer i : list) { b.m2(i); } } } public class BeanB() { @Transactional public void m2(Integer i) { // Jadvalga yozuv qo'shadi } }

Senior

IT One

166

Oldingi kompaniyangizda qanday loyiha qurish tizimi qo'llanilgan?

Junior — Middle

IT One

166

Kodda o'zgarmas ob'ektlarni yaratishni qanday ta'minlash mumkin?

Junior — Middle

IT One

Банк Россия

166

Ma'lumotlar bazalari bilan o'zaro aloqada bo'lish uchun JDBC bilan qanday tajribangiz bor?

Junior — Middle

IT One

166

ArrayDeque va LinkedList ma'lumotlar tuzilmalari qaysi farq bilan navbatlar va steklar tashkil qilish uchun qo'llaniladi?

Junior — Middle

IT One

165

Vazifa #3 Qaysi natija Session #1 sessiyasida bo'ladi? Ma'lumotlar bazasiga t jadvali bilan ulanish va satr 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

IT One

165

ExecutorService interfeysining asosiy metodlarini sanab o'tishingiz va ularning maqsadlarini tushuntirishingiz mumkinmi?

Junior — Middle

IT One

165

Ikki tomonlama bog'langan ro'yxatning markaziy qismiga element qo'shish operatsiyasining qiyinchiligi qanday baholanadi?

Junior — Middle

СБЕР Бизнес Prooftech

ОТП Банк+5

165

public static void main(String args[]) { checkMap(new HashMap<>()); checkMap(new LinkedHashMap<>()); checkMap(new TreeMap<>()); } private static void checkMap(Map<Person, String> map) { System.out.println("Tekshirish " + map.getClass()); Person ivan = new Person("Иван"); Person peter = new Person("Пётр"); Person maria1 = new Person("Мария"); Person maria2 = new Person("Мария"); map.put(ivan, ivan.name); map.put(peter, peter.name); map.put(maria1, maria1.name); map.put(maria2, maria2.name); // iteratsiya qilish va chiqarish for (Map.Entry<Person, String> entry : map.entrySet()) { System.out.println(entry); } // maria1.setName("Анна-Мария"); // maria2.setName("Анна-Мария"); System.out.println(map.get(maria1)); System.out.println(map.get(maria2)); System.out.println("==================================="); }

Senior

IT One

165

Java'da xotira oqishi nima? Uni topish uchun qanday algoritm ishlatiladi?

Senior

IT One

165

HashMap'da kalitga ko'ra elementni qidirishning vaqt murakkabligi qanday?

Junior — Middle

IT One айтеко

164

Dasturlashda try, catch va finally bloklarini ishlatib istisno bilan ishlash mexanizmini tushuntiring.