Description : In a relational model, relations are termed as (A) Tuples. (B) Attributes (C) Tables. (D) Rows.
Last Answer : (C) Tables
Description : In a relational schema, each tuple is divided into fields called A) Relations B) Domains C) Queries D) All of the above
Last Answer : B) Domains
Description : Let E1 and E2 be two entities in E-R diagram with simple single valued attributes. R1 and R2 are two relationships between E1 and E2 where R1 is one-many and R2 is many-many. R1 and R2 do not have any ... are required to represent this situation in the Relational Model? (A) 4 (B) 3 (C) 2 (D) 1
Last Answer : (B) 3
Description : Let M and N be two entities in an E-R diagram with simple single vale attributes. R1 and R2 are two relationship between M and N, whereas R1 is one-to-many and R2 is many-to-many. The minimum number of tables required to ... and R2 in the relational model are .......... (1) 4 (2) 6 (3) 7 (4) 3
Last Answer : Answer: 4
Description : Which of the following statement(s) is/are FALSE in the context of Relational DBMS ? I. Views in a database system are important because they help with access control by allowing users to see only a particular subset of the data ... (B) III and IV only (C) I, II and III only (D) II, III and IV only
Last Answer : (D) II, III and IV only
Description : Is it true or false that a relational database typically consists of related two dimensional tables?
Last Answer : Need answer
Description : In the relational modes, cardinality is termed as: (A) Number of tuples. (B) Number of attributes. (C) Number of tables. (D) Number of constraints
Last Answer : (A) Number of tuples
Description : A relational database management (RDBM) package manages datain morethan one file at once. How does itorganizethese file? As A. tables B. relations C. tuple D. both (a)and (b) E. None of the above
Last Answer : both (a)and (b)
Description : Relational database schema normalization is NOT for: (A) reducing the number of joins required to satisfy a query. (B) eliminating uncontrolled redundancy of data stored in the database. (C) ... could otherwise occur with inserts and deletes. (D) ensuring that functional dependencies are enforced.
Last Answer : reducing the number of joins required to satisfy a query.
Description : Consider the relations R(A,B) and S(B,C) and the following four relational algebra queries over R and S: I. πA,B(R⋈S) II. R⋈πB(S) III. R∩(πA(R) Χ πB(S)) IV. πA,R.B(R Χ S) where R.B refers to ... IV are the same query. (C) I, II and IV are the same query. (D) I, III and III are the same query.
Last Answer : (D) I, III and III are the same query.
Description : In a relational database model, NULL values can be used for all but which one of the following? (A) To allow duplicate tuples in the table by filling the primary key column(s) with NULL. (B) To ... D) To fill a column in a tuple when that column does not really exist for that particular tuple.
Last Answer : (A) To allow duplicate tuples in the table by filling the primary key column(s) with NULL.
Description : If D1, D2,…. Dn are domains in a relational model, then the relation is a table, which is a subset of (A) D1+D2+…. +Dn (B) D1x D2x… xDn (C) D1U D2U….UDn (D) D1- D2-….-Dn
Last Answer : (B) D1x D2x… xDn
Description : Consider the following statements regarding relational database model: (a) NULL values can be used to opt a tuple out of enforcement of a foreign key. (b) Suppose that table T has only one candidate key. If Q is in 3NF, then it is ... true. (C) (b) and (c) are true. (D) (a), (b) and (c) are true.
Last Answer : (D) (a), (b) and (c) are true.
Description : Which of the following describes a relational database? 1) It provides a relationship between integers 2) It consists of separate tables or related data 3) It retrieves data related to its queries 4) It provides a relationship between floats
Last Answer : 2) It consists of separate tables or related data
Description : Which of the following statements concerning Object-Oriented databases is FALSE? (A) Objects in an object-oriented database contain not only data but also methods for processing the data. (B ... Object-oriented databases store more types of data than relational databases and access that data faster.
Last Answer : (C) Object-oriented databases are more adapt at handling structures (analytical) data than relational databases.
Description : Based on the cardinality ratio and participation ............... associated with a relationship type, choose either the Foreign Key Design, the Cross Referencing Design or Mutual Referencing Design. (A) Entity (B) Constraints (C) Rules (D) Keys
Last Answer : (B) Constraints
Description : How are relationship between tables expressed in a relational database?
Last Answer : Tables are the basic building blocks of a relationaldatabase.
Description : ……………… is a tabular method for describing the logic of the decisions to be taken. A) Decision tables B) Decision tree C) Decision Method D) Decision Data
Last Answer : A) Decision tables
Description : …………………… is the process of organizing data into related tables. A) Normalization B) Generalization C) Specialization D) None of the above
Last Answer : A
Description : Explain when the primary key fields of two data tables need to be the same. ?
Last Answer : Due to the following condition of the relation, the primary key fields of the data tables of the two databases need to be the same to create the relation. 1. The common field must be the primary key ... field size , format etc. should be the same and two tables should be open at the same time.
Description : Find the false statement: (A) In Modern Cryptography, symmetric key algorithms use same key both for Encryption and Decryption. (B) The Symmetric cipher DES (Data Encryption Standard) was widely used ... and 124 bits. (D) Public key algorithms use two different keys for Encryption and Decryption.
Last Answer : (C) The AES (Advanced Encryption Standard) cryptosystem allows variable key lengths of size 56 bits and 124 bits.
Description : Fact-less fact table in a data warehouse contains (A) only measures (B) only dimensions (C) keys and measures (D) only surrogate keys
Last Answer : (D) only surrogate keys
Description : Which of the following statements is FALSE about weak entity set ? (A) Weak entities can be deleted automatically when their strong entity is deleted. (B) Weak entity set avoids the data ... weak entity set are not partitioned according to their relationship with tuples in a strong entity set.
Last Answer : (D) Tuples in a weak entity set are not partitioned according to their relationship with tuples in a strong entity set.
Description : Which of the following is not a binary operator in relational algebra? A) Join B) Semi-Join C) Assignment D) Project
Last Answer : D) Project
Description : Which of the following is not a logical database structure? A) Chain B) Network C) Tree D) Relational
Last Answer : A) Chain
Description : A top-to-bottom relationship among the items in a database is established by a A) Hierarchical schema B) Network schema C) Relational Schema D) All of the above
Last Answer : A) Hierarchical schema
Description : A relational database developer refers to a record as (A) a criteria. (B) a relation. (C) a tuple. (D) an attribute.
Last Answer : C) a tuple
Description : Cartesian product in relational algebra is (A) a Unary operator. (B) a Binary operator. (C) a Ternary operator. (D) not defined.
Last Answer : (B) a Binary operator.
Description : The “PROJECT” operator of a relational algebra creates a new table that has always (A) More columns than columns in original table (B) More rows than original table (C) Same number of rows as the original table (D) Same number of columns as the original table
Last Answer : (C) Same number of rows as the original table
Description : Which of the following is not a type of Database Management System? (A) Hierarchical (B) Network (C) Relational (D) Sequential
Last Answer : (D) Sequential
Description : Consider the following schemas: Branch = (Branch-name, Assets, Branch-city) Customer = (Customer-name, Bank-name, Customer-city) Borrow = (Branch-name, loan-number, customer account-number) Deposit = ... )) (C) πcustomer-name(σbalance> 10000(Borrow)) (D) σcustomer-name(σbalance> 10000(Borrow))
Last Answer : (A) πcustomer-name(σbalance> 10000(Deposit))
Description : Which of the following is true ? I. Implementation of self-join is possible in SQL with table alias. II. Outer-join operation is basic operation in relational algebra. III. Natural join and outer join operations are ... (B) II and III are correct. (C) Only III is correct. (D) Only I is correct.
Last Answer : (D) Only I is correct.
Description : In RDBMS, Data is presented as a collection of ............ A) Table B) Attributes C) Relations D) Entities
Last Answer : C) Relations
Description : ………… enable us to hide, inside the object, both the data fields and the methods that act on that data. A) Encapsulation B) Polymorphism C) Inheritance D) Overloading
Last Answer : A) Encapsulation
Description : Consider the following statements for priority queue: S1: It is a data structure in which the intrinsic ordering of the elements does determine the result of its basic operations. S2: The elements of a priority queue ... . (C) SI is incorrect and S2 is correct. (D) Both S1 and S2 are correct.
Last Answer : (D) Both S1 and S2 are correct.
Description : Which of the following control fields in TCP header is used to specify the sender has no more data to transmit? (A) FIN (B) RST (C) SYN (D) PSH
Last Answer : (A) FIN
Description : Working set model is used in memory management to implement the concept of (A) Swapping (B) Principal of Locality (C) Segmentation (D) Thrashing
Last Answer : (B) Principal of Locality
Description : The database in which records are organised in a tree-like structure is (1) Network database (2) Hierarchical database (3) Relational database (4) Object-oriented database
Last Answer : Hierarchical database
Description : Consider the following database table : Create table test( one integer, two integer, primary key(one), unique(two), check(one≥1 and ≤10), check(two≥1 and ≤5) ); How many data records/tuples atmost can this table contain ? (A) 5 (B) 10 (C) 15 (D) 50
Last Answer : (A) 5
Description : _______ model attempts to categorize a cloud network based on four dimensional factors. a) Cloud Square b) Cloud Service c) Cloud Cube d) All of the mentioned
Last Answer : Cloud Cube
Description : ey to represent relationship between tables is called (A) Primary key (B) Secondary Key (C) Foreign Key (D) None of these
Last Answer : (C) Foreign Key
Description : Which of the following is not true with respect to a trackball and/or spaceball ? I. A trackball is a two dimensional positioning device while as a spaceball provides six degrees of freedom II. Unlike the trackball a spaceball does ... of freedom. (A) I & II (B) II & III (C) II only (D) III only
Last Answer : (D) III only
Description : A three dimensional array in C' is declared as int A[x][y][z]. Here, the address of an item at the location A[p][q][r] can be computed as follows (where w is the word length of an integer): (A) &A[0][0][0]+w(y*z*q+z*p+r) (B) &A ... *q+r) (C) &A[0][0][0]+w(x*y*p+z*q+r) (D) &A[0][0][0]+w(x*y*q+z*p+r)
Last Answer : Answer: B
Description : Which of the following pairs have different expressive power? (1) Single-tape-turing machine and multi-dimensional turing machine. (2) Multi-tape turing machine and multi-dimensional ... non-deterministic pushdown automata. (4) Deterministic finite automata and Non-deterministic finite automata.
Last Answer : Deterministic push down automata and non-deterministic pushdown automata.
Description : A database that contains tables linked by common fields is called a (a) Centralized database (b) Flat file database -Technology
Last Answer : (c) Relational database stores data in the form of tables which are linked by common fields.
Description : …………………. is a group of interested components working together towards a common goal by accepting inputs and producing outputs in an organized transformation process. A) System B) Network C) Team D) System Unit
Last Answer : A) System
Description : A Multicomputer with 256 CPUs is organized as 16x16 grid. What is the worst case delay (in hops) that a message might have to take? (A) 16 (B) 15 (C) 32 (D) 30
Last Answer : (D) 30
Description : The different types of tables maintained by the operating system are ............. A) memory, logical , I/O file B) memory, I/O, file, physical C) memory, I/O, file, process D) memory, logical, I/O, physical
Last Answer : C) memory, I/O, file, process
Description : The main task carried out in the …………… is to remove repeating attributes to separate tables. A) First Normal Form B) Second Normal Form C) Third Normal Form D) Fourth Normal Form
Last Answer : D) Fourth Normal Form
Description : Which is the main function of transport layer? A) Node to node delivery B) End to end delivery C) Synchronization d) Updating and maintaining routing tables
Last Answer : B) End to end delivery