PSC Question 101/2008 : Solved

1. _______ is a powder used in laser printers to form the images on a paper
a) cartridge
b) ribbon
c) gel
d) toner


2. Worms and Trojan Horses are examples of :
a) hardware
b) firmware
c) malware 
d) freeware

3. _______ printers work by selectively heating regions of special heat sensitive paper
a) impact
b) inkjet
c) thermal
d) dot-matrix

4. The ISI mark is given by
a) BIS
b) ISO
c) ANSI
d) IEEE

5.The Laser printer was invented at :
a) Canon
b) Epson
c) HP
d) Xerox

6. In 100BASE-T, " T " stands for :
a) type
b) traffic
c) twisted pair
d) bytes

7. Which among the following utilities can detect a bad sector?
a) CHKDSK
b) SCANDISK
c) Both A & B
d) None

8. The port number used by SMTP is :
a) 13
b) 21
c) 25
d) 27

9. A packet filter is a type of :
a) compiler
b) firewall
c) inverter
d) search tool

10. The TTL field is inside the ____ header
a) Ethernet
b) IP
c) TCP
d) HTTP

11. GRUB is a / an :
a) Search Tool
b) Editor
c) Boot Loader
d) Compiler

12. Power-on-self-test is built into the
a) BIOS
b) Hard disk
c) SMPS
d) UPS

13. Powerpoint can embed content from other applications through :
a) NFS
b) OLE
c) JDBC
d) CUPS

14. In Powerpoint presentations, individual pages are called :
a) Cells
b) Tables
c) Columns
d) Slides


15. The port number used by the HTTP protocol is :
a) 13
b) 25
c) 80
d) 255

16. The utility which can be used to clean the windows registry is :
a) chkdsk
b) scandisk
c) regedit
d) fixboot

17. Indiscriminate sending of unsolicited bulk messages is known as :
a) instant messaging
b) flaming
c) phishing
d) spamming 

18. Kerberos is a _________ protocol
a) Network authentication
b) Data compression
c) Network Management
d) File Transfer

19. Athlon series of processors are made by :
a) AMD
b) Intel
c) IBM
d) Motorola

20. The ability to replace components of a computer , while it is operating is called
a) De-fragmentation
b) Hot swapping 
c) Boot Strapping
d) OLE







Answer are given in blue color . if any errors found, pls comment 
More >>

Poll One Result Announced : Answer : James Gosling

Man behind JAVA programming Langauge ?

Richard St. Barbe Baker 

0 (0%)

Richard Stalman 

3 (6%)

James Gosling  

 47 (94%)

Mark Elliot Zuckerberg 

 0 (0%)

Note : 50 persons participated in the poll and 47 made write answer..It was the question asked in last HSST Computer Science Exam.

Best Wishes

PSCTrainer

System Software & Compiler Construction

Q. What is a System software ?

System software is computer software designed to operate the computer hardware and to provide a platform for running application software. eg: Operating System


Q. What is an assembler ?
Assembler converts each assembly language statement into the corresponding machine-language statement.
There are two types of assemblers.
One-pass assemblers go through the source code once and assume that all symbols will be defined before any instruction that references them.

Two-pass assemblers create a table with all symbols and their values in the first pass, then use the table in a second pass to generate code.



Q.What are various steps to design an assembler?

1. Statement of problem:

2. Data structure:

3. Format of data bases:

Here we specify the format and content of each of the data bases task that must be undertaken even before describing the specific algorithm underlying the assembly design.

4 Algorithm: There are two passes in this

Q.Define Lexical Analysis
lexical analysis is the process of converting a sequence of characters into a sequence of tokens. A program or function which performs lexical analysis is called a lexical analyzer.

Q.What is YACC ?

YAAC is a computer program used as a parser generator developed by Stephen C. Johnson at AT&T for the Unix operating system. The name is an acronym for "Yet Another Compiler Compiler." It generates a parser (the part of a compiler that tries to make syntactic sense of the source code) based on an analytic grammar written in a notation similar to BNF.


More>>

Good News for HSST CS/CA Exam Aspirants.

Kerala Govt sanctioned about 300 more Computer Science / Computer Application Plus Two batches. It s good news for those who applied for HSST exam . Within two or three years, there is a chance of appointment in these vacancies...

In this blog we are publishing various computer science topics..There is a chance of typographical and some other type of errors in the questions as well as answers.. if you come across any such errors please inform us at the email id psctrainer@ymail.com

Best Wishes

PSCTrainer Team

Artificial Intelligence

Q. What is A. I ?

The theory and development of computer systems able to perform tasks that normally require human intelligence, such as visual perception, speech recognition, decision-making, and translation between languages.

Q.What is the term used for describing the judgmental or commonsense part of problem solving?

A. Heuristic
B. Critical
C. Value based
D. Analytical
E. None of the above

Q.What was originally called the "imitation game" ? A. LISP B. The Logic Theorist C. The Turing Test D. Cybernetics

Q.What stage of the manufacturing process has been described as "the mapping of function onto form"?
A. Design
B. Distribution
C. project management
D. field service
E. None of the above

Q.Decision support programs are designed to help managers make:A. budget projections B. visual presentations C. business decisions D. vacation schedules Q. PROLOG is an AI programming language . It was developed in 1972 at the University of Marseilles by a team of specialists. Can you name the person who headed this team? A. Alain Colmerauer B. Nicklaus Wirth C. Seymour Papert D. John McCarthy Q.Programming a robot by physically moving it through the trajectory you want it to follow is called: A. contact sensing control B. continuous-path control C. robot vision control D. pick-and-place control Q.To invoke the LISP system, you must enter A. AI B. LISP C. CL (Common Lisp) D. both b and c Q.In a rule-based system, procedural domain knowledge is in the form of: A. production rules B. rule interpreters C. meta-rules D. control rules More >>

PSC Mock Exam @ www.psctrainer.com

You can take mock exam for various PSC Examinations @ PSCTrainer MockExam Centre.

Important Notes on Software Engineering

Q. Define Software Engineering

The establishment and use of sound engineering principles in order to obtain economically software that is reliable and works efficiently on real machines.

Q. Differentiate Software engineering methods, tools and procedures.

Methods: Broad array of tasks like project planning, cost estimation etc..

Tools: Automated or semi automated support for methods.

Procedures : Holds the methods and tools together. It enables the timely development of

computer software.

Q. Write the disadvantages of classic life cycle model.

Disadvantages of classic life cycle model :

(i) Real projects rarely follow sequential flow. Iteration always occurs and creates problem.

(ii) Difficult for the customer to state all requirements

(iii) Working version of the program is not available. So the customer must have patience.

Q. What do you mean by task set in spiral Model?

Each of the regions in the spiral model is populated by a set of work tasks called a task set that are adopted to the characteristics of the project to be undertaken.

Q. What is the main objective of Win-Win Spiral Model?

The customer and the developer enter into the process of negotiation where the customer may be asked to balance functionality ,performance and other product against cost and time to market.

Q. Which of the software engineering paradigms would be most effective? Why?

Incremental / Spiral model will be most effective.

Reasons:

(i) It combines linear sequential model with iterative nature of prototyping

(ii) Focuses on delivery of product at each increment

(iii)Can be planned to manage technical risks.

Q. Write the objective of project planning ?

It is to provide a framework that enables the manager to make reasonable estimates of resources, cost and schedule.

Q. Write a short note on 4GT.

Fourth Generation Technique. 4GT encompasses a broad array of software tools. Each tool enables the software developer to specify some characteristics of software at a higher level.

Q. What is LOC ? How it is used for project estimation?

LOC : Lines of Code. It is used as estimation variable to size each element of the software. It requires considerable level of detail..

Q. Write the formula to calculate the effort in persons-months used in Dynamic multi variable Model?

Software Equation :E=[LOC * B0.333/P]3 *(1/t4) Where E is effort in person-months, t is project duration, B is special skills factor, P is productivity parameter.

Q. What are the two project scheduling methods ?

PERT- Program Evaluation and Review Techniques

CPM- Critical Path Method

Q. What is RMMM?

Risk Mitigation, Monitoring and Management Plan. It is also called Risk Aversion.

Q. List the tools or methods available for rapid prototyping.

Rapid prototyping (Speed)

(i) 4GT

(ii) Resuable software components

(iii) Formal specification and prototyping environments.

Q. What is the need for modularity ?

Need for modularity: Easier to solve a complex problem. Can achieve reusability. Best effort and complexity reduces.

Q. What is Software Architecture?

The overall structure of the software and the ways in which that software provides conceptual integrity for the system.

Q. What are the models are used for Architectural design?

Structural models

Framework models

Dynamic models

Process models

Functional models

Q. What is cohesion?

It is a measure of the relative functional strength of a module. (Binding)

Q. What is Coupling?

Measure of the relative interdependence among modules.

(Measure of interconnection among modules in a software structure.)

Q. Define Stamp coupling.

When a portion of the data structure is passed via the module interface , then it called stamp coupling.

Q. Define common coupling.

When a number of modules reference a global data area, then the coupling is called common coupling.

Q. What is  Real Time Systems.

It provides specified amount of computation with in fixed time intervals. RTS sense and control external devices, respond to external events and share processing time between tasks.

Q.Define Distributed system .

It consists of a collection of nearly autonomous processors that communicate to achieve a coherent computing system.

Q. What are the contents of HIPO diagrams?

Visual table of contents, set of overview diagrams, set of detail diagrams.

Q. What are the aspects of software reuse.

Software development with reuse

Software development for reuse

Generator based reuse

Application system reuse

Q. What is CASE ?

CASE : Computer Aided Software Engineering

CASE provides the engineer with the ability to automate manual activities and to improve engineering

insight.

Q. Define CASE Tools.

CASE Tools :

• Computer Aided Software Engineering

• It is a System software

• Provide Automated support for software process activities

• Includes program used to support software process activities

• Such as Requirement Analysis, System Modeling, Debugging and Testing

Q. How do we define Software Quality?

Software Quality :

• Conformance to explicitly stated functional and performance requirements, explicitly documented

development standards

• Implicit characteristics, expected for professional developed software

Q. What are the Factors of Software Quality?

Factors of Software Quality :

• Portability

• Usability

• Reusability

• Correctness

• Maintainability

More.. >>