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 dirancang untuk rekayasa ilmu komputer, b. tech, mca, bca, ms mahasiswa & software profesional untuk belajar questiones database kebanyakan meminta selama wawancara. Allmost semua pertanyaan dari topik yang diberikan di bawah tercakup dalam app.

Pengenalan dan aplikasi DBMS, Tujuan data base, data, Kemerdekaan, Sistem Database, tingkat architecture-, pemetaan, database, pengguna dan DBA, Struktur database relasional, Domain, Hubungan ,, Relational aljabar - operator dan sintaks dasar ,, relasional query aljabar, tuple kalkulus relasional, Model Entity-Relationship: konsep dasar, proses Desain, kendala, Keys, isu Desain, diagram ER, entitas set lemah, fitur ER diperpanjang - generalisasi, spesialisasi, agregasi, pengurangan ke database ER skema, Relational Database desain: Fungsional Ketergantungan - definisi, sepele dan non-sepele

FD, penutupan FD set, penutupan atribut, tereduksi setof FD, Normalisasi - 1NF, 2NF, 3NF, penguraian, menggunakan FD- pelestarian ketergantungan, BCNF, Multivalued

ketergantungan, 4NF, Bergabunglah ketergantungan dan Optimasi 5NF, Query Processing & Query: Sekilas, tindakan biaya query, operasi seleksi, penyortiran, bergabung, evaluasi ekspresi, transformasi ekspresi relasional, memperkirakan, statistik dari hasil ekspresi, rencana evaluasi, muncul pandangan , Manajemen Transaksi:

Konsep transaksi, sifat transaksi, serializability transaksi, pengujian untuk serializability, pemulihan sistem, Phase Two-Komit protokol, Pemulihan dan Atomicity, pemulihan berbasis Log, bersamaan, eksekusi transaksi dan masalah terkait, mekanisme Mengunci, solusi untuk concurrency terkait, masalah, kebuntuan,, dua-fase protokol penguncian, Isolasi, penguncian Intent, Keamanan: pengenalan, kontrol akses Discretionary, MandatoryAccess Control, Data Encryption, SQL Konsep: Dasar-dasar dari SQL, DDL, DML, DCL, struktur - penciptaan, perubahan, mendefinisikan kendala - Kunci utama, kunci asing, unik, tidak null, memeriksa, IN operator, Fungsi - agregat, fungsi, fungsi Built-in, numerik, tanggal, fungsi string, set operasi, sub-query, berkorelasi sub-query, Penggunaan kelompok oleh, memiliki, order by, bergabung dan jenis nya, Exist, Apa, Semua, melihat dan jenis nya, perintah kontrol transaksi - Berkomitmen, Rollback, savepoint, PL / SQL Konsep: Cursors, disimpan prosedur, Stored Function, Database, Pemicu</div> <div class="show-more-end">