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">这个程序是专为计算机科学与工程，B。高科技，MCA，BCA，MS学生与软件专业学习数据库questiones接受记者采访时大多要求。从主题下面给出的allmost所有的问题都包括在应用程序。

介绍和数据库管理系统的应用程序，数据库，数据独立性，数据库系统，建筑 - 水平，映射，数据库，用户和DBA，关系数据库，域，关系,,关系代数结构的目的 - 基本操作和语法,,关系代数查询，元组关系演算，实体关系模型：基本概念，设计的过程，约束，键，设计的​​问题，ER图，弱实体集，扩展ER特性 - 泛化，专业化，聚集，减少到ER数据库模式，关系型数据库设计：函数依赖 - 的定义，平凡和不平凡

FD，FD组关闭，属性封闭，束缚SETOF FD，规范化 - 1NF，2NF，3NF，分解，采用FD-依赖保存，BCNF，多值

依赖，4NF，Join依赖和5NF，Query处理和查询优化：概述，查询成本，选用运行措施，整理，join，评价表达式，关​​系式改造，估计，表达式的结果，评估计划的统计，物化视图，交易管理：

交易理念，交易性质，交易，检测为串行化的串行化，系统恢复，两阶段提交协议，恢复和原子性，基于日志的恢复，交易及相关问题，锁定机制的同时，执行，解决了并发性有关，问题僵局，两阶段锁定协议，隔离，意图锁定，安全：引进，自主访问控制，MandatoryAccess控制，数据加密，SQL概念：SQL，DDL，DML，DCL，结构的基础 - 设立，变更，定义约束 - 主键，外键，唯一，不为空，检查，IN操作符，功能 - 集料，功能，内置的功能，数字，日期，字符串函数，集操作，子查询，相关子查询，使用GROUP BY，HAVING，为了通过，加入和它的类型，存在，任何，所有，观其类型，交易控制命令 - 提交，回滚，保存点，PL / SQL概念：游标，存储过程，存储功能，数据库，触发器</div> <div class="show-more-end">