Computer Science Questions Previously asked by PSC

Q. The statements char c[ ] = " there!"; putchar(c); will result in printing: 
(A) There
(B) there.
(C) there!
(D) "there!"


Q. Total number of nodes in a 3-stage ternary tree will be : 
(A) 12
(B) 5
(C) 13
(D) 15

Q. The power ratio of 1 in dBs will be : 
(A) 10
(C) 1
(B) 0
(D) 100

Q. The units for telephone traffic is : 
(A) Erlangs
(B) Poissons
(C) Bells
(D) N one of the above

Q.   The number of full adders needed to implement one bit serial adder is :  
(A)   2  
(B)   4  
(C)   8  
(D)   1  

Q.   The supply voltage of ECL gates is :      
 (A)   -5.2V   (B)   +5.2V  
 (C)   -3.3V   (D)   +1.5V  

Q.   Which of the following is not a standard size of floppy diskettes?   
(A)   5.25 in  
(B)   10 in  
(C)   3.5 in  
(D)   8 in  

Q.   The Moore's law is applicable to :      
(A)   Automobile industry  
(B)  Computer industry  
(C)   Cement industry  
(D)   Semiconductor industry
 
Q.   DVD stands for:       
(A)   Digi tal Video Disc  
(B)   Digital Vital Disc  
(C)   Digital Versatile Disc  
(D)   N one of the above  

C and C++ Questions >>

Possible Questions from Computer Concepts

Q. "STORED PROGRAM CONCEPT " Postulated By

a. Richard Stalman

b. Henry Dunant

c. Pascal

d. John von neumann

Q? : Founder of the social networking website 'Facebook' 

a. Mark Elliot Zuckerberg

b. Henry Dunant

c. Pascal

d. John von neumann

9. Special programs which wrote for understanding the operation of the device it interfaces to, such as a printer, video card, sound card or CD ROM drive. 

(a) Operating System 

(b) Software 

(c) Firmware 

(d) Driver

Q? Name associated with Open Source Program 

a. Pascal

b. Henry Dunant

c. Richard Stalman

d. John von neumann

Q? An internet protocol that allows quick file tarns-mission to remote computers is know as: 

(a) HTTP 

(b) FI'P 

(c) TCP/IP 

(d) ISP

Q. Protocol used to temporarily store new messages in your mailbox on an e-mail server is known as: 

(a) POP 

(b) SMTP

(c) TCP/IP 

(d) FTP 

Q. Company which maintains internet computers and telecommunications equipment in order to provide internet access to businesses, organisaations and individuals is called: 

(a) Internet Service Agency 

(b) ICAAN 

(c) Internet Service Provider 

(d) Web Hosting 

Q.The device that protects all computers in the net-work from many attacks is called: 

(a) Router 

(b) Access Point 

(c) Anti Virus Software 

(d) Firewall 

Q. Free telephone-style conversations to travel over the internet to virtually anywhere in the world is known as: 

(a) Teleconference 

(b) Videoconference 

(c) Internet Telephony 

(d) Internet broadcasting

Q. The main routes that data travels over the interrnet is called: 

(a) Internet backbone 

(b) Firewall 

(c) Internet Router 

(d) Silicon Valley 

Q.An IT term refers to allowing someone to open web pages and see web sites on the internet. 

(a) Hacking 

(b) Cracking 

(c) Web Caching 

(d) Web Surfing

Q. 1,024 gigabytes is equal to: 

(a) 1 kilobytes 

(b) 1 megabyte 

(c) 1 yottabyte 

(d) 1 terabyte 

Q. This type of memory would not lose its data when the computer lost power thus ensuring BIOS programs would always be available. What type of memory is referring here? 

(a) ROM 

(b) RAM 

(c) Primary Memory 

(d) Secondary Memory

More >>

Questions asked in HSST Junior Exam - 2006

Which among the following is an interior routing protocol?
A) OSPF
B) EGP
C) BGP
D) NNTP

The maximum length ( in bytes ) of an IP packet

A) 255

B) 1023

C)32767

D) 65535

Which among the following is not a type of HTTP request ?

A) GET

B) HEAD

C) RELEASE

D) POST

The degree of multiprogramming is controlled primarily by :

A) Short-term scheduler

B) Medium-term scheduler

C) Long-term scheduler

D) Disk Scheduler

Which of the following is a high-level synchronization concept?

A) Interrupt

B) Semaphore

C) Mutex

D) Monitor

Paging solves the problem of :

A) Thrashing

B) Page faults

C) Internal fragmentation

D) External fragmentation

Yacc is a :
A) Lexical analyzer generator

B) Parser generator

C) Macro preprocessor

D) Code optimizer

The BSD version of Unix was developed by :

A) Bell Labs

B) MIT

C) University of Berkeley

D) Sun Microsystems

_____ uses an FAT for file allocation

A) OS/2

B) Linux

C) Unix

D) Solaris

Which of the following cannot be blank ( null ) ?

A) Foreign key

B) Secondary key

C) Primary key

D) Connecting key

More >>

HSST Computer Science Syllabi - Page 2

6.     Data Communication and Computer Networks
Data Communication : Analog and Digital transmission. Asynchronous and Synchronous
transmission. Transmission media. Multiplexing and Concentration, Switching techniques.
Polling. Channel capacity.  Transmission media - twisted pair, coaxial cables, fibre-optic
cables, wireless transmission- radio, microwave and infrared waves. Light wave
transmission. Telephones - local loop, trunks, multiplexing, switching, narrowband ISDN,
broadband ISDN. ATM, High speed LANs. Cellular Radio, Communication satellitesgeosynchronous and low-orbit.
Reference Models : The OSI model,  TCP/I P model.
Topologies, Networking Devices. Protocols for - ( i) Data link layer (ii) Network layer, and
(iii) Transport layer, TCP/I P protocols, Networks security, Network administration.
Local Area Networks (LAN), Metropolitan Area Networks (MAN), Wide Area Networks
(WAN). Wireless Networks, Inter Networks.
Internetworking : Switch/Hub. Bridge. Router. Gateways. Concentrated virtual circuits.
Tunnelling, Fragmentation. Firewalls.Routing : Virtual circuits and datagrams. Routing Algorithms. Congestion control.
Network Security : Cryptography - public key, secret key, Domain Name System (DNS) - Electronic
Mail and World Wide Web {WWW). The DNS, Resource Records. Name servers. E-mail
architecture and E-mail Servers.
7.   System software and Compilers.
Assembly language fundamentals (8085 and 8088 based assembly language programming).
Assemblers - 2-pass and single-pass.  Macros and  macro processors.
Loading, linking, relocation, program  relocatability.  Linkage editing.
Text editors, Programming  Environments. Debuggers and program generators.
Compilation and Interpretation. Bootstrapping. Phases of compilation. Lexical analysis. LEX.
Context free grammars. Parsing and parse trees. Representation of parse trees and rightmost and
leftmost derivations, Bottom up parsers - shift-reduce. operator precedence and LR. YACC.
Top down parsers - left recursion and its removal. Recursive descent parser. Predictive parser.
Intermediate codes - Quadruples,  Triples. Indirect Triples. Intermediate code generation, Code
generation, Code optimization.

 8.     Operating Systems
Main functions of operating systems. Multiprogramming, multiprocessing and multitasking.
Memory management ; Virtual memory, paging, fragmentation.
Concurrent processing : Mutual exclusion. Critical regions, lock and unlock.
Scheduling : CPU scheduling. I /O Scheduling. Resource scheduling. Deadlock and scheduling
algorithms. Banker's algorithm for deadlock handling.
The Unix system  :  File system, process management. Bourne shell, shell  variables, command line
programming.
Systems Calls :  Creat, open, close, read,  write. Iseek, link, unlink, stat, fstat, umask, chmod, exec,
fork, wait, system.



Next Page >>

HSST Computer Science Syllabi - Page 3

9.   Software  Engineering
System Development Life Cycle (SDLC) : Steps, Water fall model. Prototypes, Spiral model.
Software Metrics ; Software Project Management.
Software Design : System design. detailed design. function oriented design, object-oriented design,
user interface design. Design level metrics.
Coding and Testing : Testing level metrics. Software quality and reliability. Clean room approach,
software engineering.

10.     Computer Graphics
Display systems. Input devices, 2D Geometry - .Algorithms for drawing primitives, clipping and
windowing, windows, view ports, Graphic operations for transformations , 3D Graphics. Animation,
Graphics standard. Applications.
Storage Devices, Input Tools. Authoring Tools, Application, Files.

11.  Programming Language Theory
Programming language concepts, paradigms, models.
Data. Data types, Operators, Expressions. Assignment. Flow of Control - Control structures, I/O
structures. I/O statements, User-Defined and built- in functions. Parameter passing.
Principles, classes, inheritance, class hierarchies, polymorphism, dynamic binding, reference
semantics and their implementation.
Principles, functions, lists, types and polymorphism, higher order functions, lazy evaluation,
equations and pattern matching.
Principles, horn clauses and their execution, logical variables, relations, data structures, controlling
the search order, program development in Prolog, implementation of Prolog, example programs in
Prolog.

12.  Current Trends and Technologies
The topics of current interest in Computer Science and Computer Applications shall be covered. The
experts shall use their judgement from time to time to include the topics of popular interest which are
expected to be known by an ardent follower of the field. Currently, they include :
Parallel computing
Parallel virtual Machine (PVM) and message passing interface (MPI) libraries and calls. Advanced
architectures. Today's fastest computersMobile Computing
Mobile connectivity - Cells. Framework, wireless delivery technology and switching methods, mobile
information access devices, mobile data internetworking standards, cellular data communication
protocols, mobile computing applications. Mobile databases - protocols, scope, tools and technology.
E-Technologies

Electronic Commerce : Framework, Media convergence of Applications, Consumer Applications,

Organisation applications.

Electronic Payment Systems : Digital Token, Smart Cards, Credit Cards. Risks in Electronic Payment

System, Designing Electronic Payment Systems.

Electronic Data Interchange (EDI) : Concepts, Applications, (Legal, Security and Privacy) issues.

EDI and Electronic Commerce. Standardisation and EDI. EDI Software Implementation. EDI

Envelope for Message Transport, internet-based EDI.

Data Warehousing : Data Warehouse environment, architecture of a data warehouse methodology,

analysis, design, construction and administration.

Data Mining : Extracting models and patterns from large databases, data mining techniques,

classification, regression, clustering, summarization, dependency modelling, link analysis,

sequencing analysis, mining scientific and business data.

Principles of parallelism, co routines, communication and execution, Parallel Virtual Machine (PVM)

and Message Passing Interface (MPI) routines and calls. Parallel programs in PVM paradigm as well

as MPl paradigm for simple problems like matrix multiplication.

Courtesy : Official Website of Kerala PSC

Mobile Computing : Facts

What is Mobile Computing?

"Mobile computing" is a generic term that refers to technologies that allow you to take your computer with you.There are three basic genres of mobile computing.  The first uses mobile computers.  These are computers or similar devices that are designed for mobile use.  They include notebooks, PDAs, and mobile phones.  The second genre is remote connection.  This type of mobility allows you to connect to your computer from remote locations and work as though you were sitting in front of it.  The final type of technology is known as Desktop Virtualization.  

Difference Between USB 3.0 and USB2.0

USB (Universal Serial Bus) 3.0

USB 3.0 has transmission speeds of up to 5 Gbit/s, which is 10 times faster than USB2.0 (480 Mbit/s). USB 3.0 significantly reduces the time required for data transmission, reduces power consumption, and is downward compatible with USB 2.


USB (Universal Serial Bus) 2.0

It is also referred to as Hi-Speed USB, USB 2.0 is an external bus that supports data rates up to 480Mbps. USB 2.0 is an extension of USB 1.1.

What is Bluetooth ?

Bluetooth is an open wireless technology standard for exchanging data over short distances (using short wavelength radio transmissions) from fixed and mobile devices, creating personal area networks (PANs) with high levels of security.

GK BASED ON COMPUTER SCIENCE MOST USEFUL FOR LET AND LDC EXAMINATIONS

1) Fastest component of a computer system is 

a) Flash ROM b) Cache memory 

c) DDR RAM d) CPU

2. Which tags are placed on animals, to track all of the animals movements.

a)POS b) RFID c) PPS d) GPS

3. _______________ uses an FAT for file allocation?

a) WINDOWS b) Linux c) Unix d) Solaris

4. TLB stands for?

a) Table Lookup Buffer b) Translation Look aside Buffer c) Translation table d) None

5. The address space of 8086 CPU is?

a) 1 Megabytes b) 256 Kilobytes c) 1 Kilobyte d) 64 kilobytes

6. The following statement

printf(”%f”, 9/5); prints

(a) 1.8 (b) 1.0 (c) 2.0 (d) none of the above

7. C is a?

(a) high level language (b) low level language

(c) high level language with some low level features.

(d) low level language with some high level features.

8. What will happen if in a C program you assign a value to an array element whose subscript exceeds the size of array?

(a. The element will be set to 0.
(b. The compiler would report an error.
(c. The program may crash if some important data gets overwritten.
(d. The array size would appropriately grow.

9. Which of the following operations can be performed on the file "NOTES.TXT" using the below code? FILE *fp;
fp = fopen("NOTES.TXT", "r+");
(a. Reading
(b. Writing

(c. Appending 

(d,Read and Write 

10. One of the following is not a real RDBMS
 a) dBase b) DBII c) MA Access d) Oracle

11. Multi –media System involves

a) Only Audio and Video

b) Animation Video Movies

c) Animation movie with Text also

d) All type of movie with Animation Graphics and Text 


12. The minimum number of temporary variables needed to swap the contents of two variables is?

(a)1 (b)2 (c)3 (d)0 

13. Ping is a command used for

a) Checking MAC address

b) Checking Networking functionality and validity of IP address

c) Checking cabling performance

d) Checking cable connectivity only

14. The candidate key which identifies the tuples in a relation uniquely is called?

a) super key b) Primary key c) Foreign key d) none of the above

15. Back up and restore is preferred for

a) All files and data together b) System data areas only

c) Selected file system components d) Disk image for recovery

16. The term bit is short for:
A. megabyte.
B. binary language.
C. binary digit.
D. binary number.

17. A string of eight 0s and 1s is called a:
A. megabyte.
B. byte.
C. kilobyte.
D. gigabyte.

18. A____________ is approximately one billion bytes.
A. kilobyte
B. bit

C. gigabyte
D. megabyte

19.____________ is any part of the computer that you can physically touch.
A. Hardware
B. A device
C. A peripheral
D. An application

20. The components that process data are located in the:
A. input devices.
B. output devices.
C. system unit.
D. storage component.

21. A____________ is approximately a million bytes.
A. gigabyte
B. kilobyte
C. megabyte
D. terabyte

22. All of the following are examples of storage devices EXCEPT:
A. hard disk drives.
B. printers.
C. floppy disk drives.
D. CD drives.

23.The____________, also called the “brains” of the computer, is responsible for processing

data.

A. motherboard
B. memory
C. RAM
D. central processing unit (CPU)

24. The CPU and memory are located on the:
A. expansion board.
B. motherboard.
C. storage device.
D. output device.

25. Word processing, spreadsheet, and photo-editing are examples of:
A. application software.
B. system software.
C. operating system software.
D. platform software.

26.____________ is a set of computer programs used on a computer to help perform tasks.
A. An instruction
B. Software
C. Memory
D. A processor

27. The PC (personal computer) and the Apple Macintosh are examples of two different:
A. platforms.
B. applications.
C. programs.
D. storage devices.

28. DSL is an example of a(n)____________ connection.
A. network
B. wireless
C. slow
D. broadband

29. Which of the following is the correct order of the four major functions of a computer?
A. Process , Output , Input , Storage
B. Input , Output, Process , Storage
C. Process , Storage , Input , Output
D. Input , Process , Output , Storage

30.____________ bits equal one byte.
A. Eight
B. Two
C. One thousand
D. One million

31. The operating system is the most common type of____________ software.
A. communication
B. application
C. system
D. word-processing software

32. The two broad categories of software are:
A. word processing and spreadsheet.
B. transaction and application.
C. Windows and Mac OS.
D. system and application

33. All of the following are examples of real security and privacy risks Except_____
(A) hackers
(B) spam
(C) viruses
(D) identify theft

34. The OSI model is divided into_______ processes called layers.

(A) five

(B) six
(C) seven
(D) eight

35. Viruses are often transmitted by a floppy disk left in the floppy drive
(A) Trojan horse
(B) Boot sector

(C) Script
(D) Logic bomb

36. Servers are computers that provide resources to other computers connected to a
(A) mainframe
(B) Network
(C) supercomputer
(D) client

37. URL stands for........
(A) Universal Research List
(B) Universal Resource List
(C) Uniform Resource Locator
(D) Uniform Research Locator

38. You must install a __________ on a network if you want to share a broadband Internet.

A) Router
(B) modem
(C) node
(D) cable

39. Chip is a common nickname for a (n):
(A) transistor
(B) resistor
(C) Integrated circuit
(D) semiconductor

40. The design of the network is called the network:
(A) Architecture
(B) server
(C) transmission
(D) type

41.  Personal logs or journal entries posted on the Web are known as:
(A) Podcast
(B) Webcasts
(C) Blogs
(D) subject directories

42. Linux is a ____________ operating system.
(A) Open-source
(B) Microsoft
(C) Windows
(D) Mac

43. What is a backup?
(A) Restoring the information backup
(B) An exact copy of a system's information
(C) The ability to get a system up and running in the event of a system crash or failure
(D) All of these

44.____________ are lists of commands that appear on the screen.
(A) GUIs
(B) Icons
(C) Menus
(D) Windows

45. Verification of a login name and password is known as:
(A) configuration
(B) accessibility
(C) Authentication
(D) logging in

46. 'MICR' technology used for clearance of cheques by banks refers to—
(1) Magnetic Ink Character Recognition
(2) Magnetic Intelligence Character Recognition
(3) Magnetic Information Cable Recognition
(4) Magnetic Insurance Cases Recognition

47. The CPU and memory are located on the:
A. expansion board.
B. Motherboard.
C. storage device.
D. output device.

48. First generation computer systems used
(a) Transistors

(b) Vacuum tubes
(c) Magnetic cores

(d) Silicon chips

49.  Charles Babbage invented
(a) ENIAC

(b) Difference engine

(c) Electronic computer

(d) Punched card

50. Which one of the following is not a programming language of a computer?
(a) BASIC

(b) FORTRAN

(c) LASER

(d) PASCAL

The likely answers are written in green ..if any error pls intimate