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WorksheetsDistributed Review
Total questions: 63
Worksheet time: 32mins
If one site fails in distributed system then ___________
the remaining sites can continue operating
all the sites will stop working
directly connected sites will stop working
none of the mentioned
A global system of interconnected computer networks is known as:
Ethernet
Intranet
Internet
Ultra-net
3) The capability of a system to adapt the increased service load is called ___________
scalability
tolerance
capacity
none of the mentioned
What is not a major reason for building distributed systems?
Resource sharing
Computation speedup
Reliability
Simplicity
The transparency that enables multiple instances of resources to be used is called
Replication
Scaling
Concurrency
Performance
The transparency that enables accessing local and remote resources using identical operations is called
Concurrency
Access
Performance
Scaling
Which of the following describes e-commerce?
Doing business electronically
Doing business
Sale of goods
All of the above
Which of the following is part of the four main types for e-commerce?
B2B
B2C
C2B
All of the above
________ is the science to making messages secure
Cryptography
Cryptoanalysis
Either Cryptography or Cryptoanalysis
Neither Cryptography or Cryptoanalysis
The ________ is the message after transformation
plaintext
ciphertext
secret-text
none of these
In a(n) ________, the key is called a secret key
asymmetric-key
either asymmetric or symmetric-key
symmetric-key
neither asymmetric nor symmetric-key
Cookies were originally designed for ____________
Client side programming
Server side programming
Both client and server side programming
Socket programming
The WWW today is a _________ client-server service, in which a client using a browser can access a service using a server
limited
vast
distributed
none
In a URL, the ________ is the computer on which the information is located
host
path
protocol
none
Markup Languages are not used for which of the following?
user interfaces
content syndication
none
user interfaces
Firewalls are to protect against
virus attacks
fire attacks
data driven attacks
unauthorized attacks
Which one of the following is a key function of firewall?
coping
monitoring
moving
deleting
__________ provides an isolated tunnel across a public network for sending and receiving data privately as if the computing devices were directly connected to the private network.
Virtual Private Network
Virtual Protocol Networking
Virtual Protocol Network
Visual Private Network
VPNs uses encryption techniques to maintain security and privacy which communicating remotely via public network
True
False
Which of the following is not an advantage of Distributed Systems?
All the nodes in the distributed system are connected to each other
It can be scaled as required
Failure of one node does not lead to the failure of the entire distributed system
Some messages and data can be lost in the network while moving from one node to another
This type of VPN is used for home private and secure connectivity
Remote access VPN
Site to site VPN
Peer to peer VPN
Router to router VPN
A distributed database is which of the following?
A single logical database that is spread to multiple locations and is interconnected by a network.
A loose collection of file that is spread to multiple locations and is interconnected by a network.
A single logical database that is limited to one location.
A lose collection of file that is limited to one location.
Storing a separate copy of the database at multiple locations is which of the following?
Data Replication
Horizontal Partitioning
Vertical Partitioning
Horizontal and vertical Partitioning
An autonomous homogenous environment is which of the following?
The same DBMS is at each node and each DBMS works independently.
The same DBMS is at each node and a central DBMS coordinates database access.
A different DBMS is at each node and each DBMS works independently.
A different DBMS is at each node and a central DBMS coordinates database access.
JSP includes a mechanism for defining _____________ or custom tags
static attributes
local attributes
dynamic attributes
global attributes
A JSP page consists of which tags?
HTML tags
JSP tags
HTML tags and JSP tags
None
If one site fails in distributed system then ___________
all the sites will stop working
directly connected sites will stop working
the remaining sites can continue operating
none
3) The capability of a system to adapt the increased service load is called ___________
tolerance
scalability
capacity
none
What is not a major reason for building distributed systems?
Resource sharing
Computation speedup
Reliability
Simplicity
The transparency that enables multiple instances of resources to be used is called
Replication transparency
Scaling transparency
Concurrency transparency
Performance transparency
All the resources are shared and integrated within one OS, in the computing paradigm named
Distributed computing
Parallel computing
Cloud computing
Centralized computing
All fault tolerant techniques rely on
Integrity
Dependability
Redundancy
Availability
What type of faults remains in the system for some period and then disappears?
Permanent
Transient
Intermittent
All of the mentioned
Which of the following approaches are used to achieve reliable system?
Fault prevention
Fault removal
Fault tolerance
All of these
What is JSP?
Java Server Pages (JSP) is a client-side programming technology that enables the creation of dynamic, platform-independent method for building web-based applications
Java Server Pages (JSP) is a server-side programming technology that enables the creation of dynamic, platform-independent method for building web-based applications
Both of the answers
None of the answers
Which of the following is the correct syntax to declare comments in JSP?
<%-- This is JSP comment --%>
<!-- This is JSP comment --!>
//
/*
What does XML stand for?
EXtra Modern Link
EXtensible Markup Language
Example Markup Language
X-Markup Language
Which statement is true?
All XML elements must have a closing tag
All XML documents must have a DTD
All XML elements must be lower case
All the statements are true
What service is not provided by Web Servers?
Serving web pages
Running gateway programs
Resource sharing
Server side scripting
__________ cookies remain even after the web browser is closed
Session
Third-party
Permanent
Second-party
Cookies are used to do which of the following
Store your ID and password for subsequent logons to the site
Store contents of electronic shopping carts
To track web activity
All of these
Which of the following is not a dimension of e-commerce security provided by encryption?
Availability
Message integrity
Non repudiation
Confidentiality
Public key encryption uses multiple keys. One key is used to encrypt data, while another is used to decrypt data. The key used to encrypt data is called the _________ key, while the key to decrypt data is called the _______ key
Encryption, decryption
Private, public
Encryption. Public
Public, private
A distributed system is just another name for a computer network.
False
True
Which of the following is not a characteristic of a distributed system?
Single point of control
Multiple autonomous components
Software runs in concurrent processes on different processors
Resources may not be accessible
Which of the following is not a characteristic of a Centralized system?
Components are not shared by all users
One component with non-autonomous parts
Single point of failure
Software runs in a single process
What is meant by the tern "Openness" as it relates to distributed systems
Detailed interfaces are available making the system flexible, portable and inter-operable
Detailed interfaces are available making the system flexible, portable and inter-operable
The distributed system is open and available for use anytime
None of these
The adaption of a distributed system to accommodate for example more users, wider geographical area, etc. without suffering degradation in performance refers to?
Scalability
Fault Tolerance
Concurrency
Resource sharing
The ability of a distributed system to maintain availability even at low levels of hardware, software or network reliability refers to?
Fault Tolerance
Availability
Scalability
Concurrency
Which of the following is not a type of distributed system Transparency?
Visibility
Access
Location
Migration
Software that sits between the application software on the client and the application software on the server, linking the two is called?
middleware
stub software
the connection string
the connection manager software
An HTTP request from client to server has three parts, namely:
Request line, request header, response code
Request line, request header, request body
Request header, response code, URL locator
HTTP does not generate requests
The most common web server software is Microsoft Internet Information Server (IIS), followed by Apache.
True
False
The command to start the Apache web server is ____________
run
start.bat
start
startup.bat
To view you project website in the Apache web server you use the address:
http://localhost:8080//myWebSite/homepage.html
What is the IP address of localhost
192.168.0.1
8080
127.0.0.1
192.168.100.1
Which of the following is not true for XML?
XML is a markup language much like HTML
XML was designed to carry data
XML tags are predefined
XML stands for EXtensible Markup Language
Which of the following is not true of XHTML?
XHTML stands for EXtensible HyperText Markup Language
XHTML is almost identical to HTML 4.01
XHTML is a W3C Recommendation
XHTML is not as strict and as HTML
JSP is an acronym for:
Java Server Pages
Java Servlet Platform
Java Servlet Protocol
Java Session Pages
JSP can include java as embedded code between which delimiters.
<% and %>
% and %
/* and */
<< and >>
Which of the following is not a requirement of the Java Bean Standard?
A bean must have a constructor with at least one argument
A bean must have a zero argument constructor
A bean class should have no public instance variables
Instances variables should be accessed via setter and getter methods
Session Management is necessary because:
Layer 5 of the OSI model does not apply to e-commerce
HTTP is a stateless protocol
Not all users of a website has passwords
None of the these
Which of the following is not true about cookies?
Cookies are Small bits of textual information that a web server sends to a browser
Cookies are both a threat to security and privacy
Cookies can be session cookies or persistent cookies
Cookies allow for focused advertising and user avoiding the use of username and passwords
The JSP environment supports sessions automatically, and allows developers to ignore the underlying mechanisms for the most part.
True
False
