DBMS Interview Questions

This app is designed for computer science engineering,b. tech, mca,bca,ms student & software professionals to learn Database questiones mostly asked during interview. Allmost all question from topics given below are covered in the app.

Introduction and applications of DBMS, Purpose of data base, Data, Independence, Database System,architecture- levels, Mappings, Database, users and DBA,Structure of relational databases, Domains, Relations,,Relational algebra – fundamental operators and syntax,,relational algebra queries, tuple relational calculus,Entity-Relationship model :Basic concepts, Design process, constraints, Keys,Design issues, E-R diagrams, weak entity sets,extended E-R features – generalization,specialization,aggregation, reduction to E-R database schema,Relational Database design :Functional Dependency – definition, trivial and non-trivial

FD, closure of FD set, closure of attributes, irreducible setof FD, Normalization – 1Nf, 2NF, 3NF, Decomposition,using FD- dependency preservation, BCNF, Multivalued

dependency, 4NF, Join dependency and 5NF,Query Processing & Query Optimization :Overview, measures of query cost, selection operation,sorting, join, evaluation of expressions,transformation of relational expressions, estimating,statistics of expression results, evaluation plans,materialized views,Transaction Management :

Transaction concepts, properties of transactions,serializability of transactions, testing for serializability,System recovery, Two- Phase Commit protocol,Recovery and Atomicity, Log-based recovery, concurrent,executions of transactions and related problems,Locking mechanism, solution to concurrency related,problems, deadlock, , two-phase locking protocol,Isolation, Intent locking,Security:introduction, Discretionary access control, MandatoryAccess Control, Data Encryption,SQL Concepts :Basics of SQL, DDL,DML,DCL, structure – creation,alteration, defining constraints – Primary key, foreign key,unique, not null, check, IN operator,Functions - aggregate,functions, Built-in functions,numeric, date, string functions, set operations, sub-queries,correlated sub-queries, Use of group by, having, order by,join and its types, Exist, Any, All , view and its types,transaction control commands – Commit, Rollback,Savepoint,PL/SQL Concepts :Cursors, Stored Procedures, Stored Function,Database,Triggers

</div> <div jsname="WJz9Hc" style="display:none">Aplikasi ini direka untuk kejuruteraan sains komputer, b. teknologi, MCA, BCA, ms pelajar & perisian profesional untuk belajar questiones Pangkalan kebanyakannya ditanya semasa temuduga. Allmost semua soalan daripada topik yang diberikan di bawah ini dibincangkan dalam app.

Pengenalan dan aplikasi DBMS, Tujuan pangkalan data, data, Kemerdekaan, Sistem Pangkalan Data, tahap architecture-, Pemetaan, Pangkalan Data, pengguna dan DBA, Struktur pangkalan data hubungan, Domain, Perhubungan ,, algebra Relational - Pengusaha asas dan sintaks ,, hubungan pertanyaan algebra, tuple kalkulus hubungan, model Entiti-perhubungan: konsep asas, proses reka bentuk, kekangan, Keys, isu-isu reka bentuk, gambar rajah ER, entiti lemah set, ciri-ER dilanjutkan - generalisasi, pengkhususan, mengumpul, pengurangan kepada pangkalan data ER skema, Pangkalan Relational Reka bentuk: Kebergantungan Fungsian - definisi, remeh dan bukan remeh

FD, penutupan set FD, penutupan sifat-sifat, tidak dapat dijelaskan dengan setof FD, penormalan - 1NF, 2NF, 3NF, penguraian, menggunakan FD- pergantungan pemeliharaan, BCNF, berbilang nilai

kebergantungan, 4NF, Sertai pergantungan dan 5NF, Pertanyaan Processing & Pertanyaan Optimization: Tinjauan, langkah-langkah kos pertanyaan, operasi pemilihan, menyusun, menyertai, penilaian ungkapan, transformasi ungkapan hubungan, menganggarkan, statistik keputusan bersuara, rancangan penilaian, kenyataan pandangan , Transaction Pengurusan:

Konsep transaksi, sifat-sifat transaksi, serializability urus niaga, ujian untuk serializability, pemulihan Sistem, dua Fasa Komited protokol, Pemulihan dan Atomicity, pemulihan berasaskan Log, serentak, hukuman mati transaksi dan masalah berkaitan, mekanisme Mengunci, penyelesaian kepada keserentakan berkaitan, masalah, kebuntuan, dua fasa protokol mengunci, Pengasingan, mengunci niat, Keselamatan: pengenalan, kawalan akses Budi Bicara, Kawalan MandatoryAccess, Penyulitan Data, Konsep SQL: Dasar-dasar dari SQL, DDL, DML, DCL, struktur - penciptaan, pengubahan, menentukan kekangan - kunci utama, kunci asing, unik, tidak batal, daftar, IN operator, Fungsi - agregat, fungsi, fungsi terbina dalam, angka, tarikh, fungsi tali, operasi set, sub-pertanyaan, dikaitkan sub-pertanyaan, Penggunaan kumpulan dengan, mempunyai, perintah oleh, menyertai dan jenis, yang Wujud, Mana-mana, Semua, melihat dan jenis, yang arahan kawalan transaksi - Komited, pengkalan, Savepoint, Konsep PL / SQL: Kursor, prosedur yang disimpan, Fungsi disimpan, Pangkalan Data, Pencetus</div> <div class="show-more-end">