GK FOR CSE B TECH

The LSB of binary number 10111 has a weight of

2*2

2*2*2

Real number are represented in memory by exponent &mantissa

2"s compliment

1"s compliment

sign & magnitude

Expansion of ASCII is

American Standard Code For information interchange

American Standard Code for internet information

American source code for information interchange

none of these

Unicode provides capacity to encode

all charactors in all languages

latin only

english

ASCII

2's compliment of a binary number is calculated by

adding 1 to 1"s compliment

adding 1 to mantissa

multiplying by -1

adding 1 to exponent

Integer can be represented in binary by

Sign & magnitude

1s compliment

2s compliment

All of these

Total number which can be represented by 1's compliment

2^(n-1)

2^(n+2)

2^n

2n-1

Pick out the odd one

Validity

Storage

Input of data

Output of data

In sign & magnitude method 0 stands in MSB for

+ve number

-ve number

integer

real number

ASCII code is --------bit code

7 bit

7 MB

7GB

7byte

2's compliment of 0 is

-1

To calculate 1's compliment of a binary number replace

0 to 1&1to 0

1 to 2& 2 to 1

0 to 2 & 2 to 1

none of these

addition of binary number 1+1=

-1

101

In substraction of binary number 0-1=

010

-1

Nowadays which type of data processing is used

Commercial

Industrial

Electronic

scientific

Number system used nowadays is

Decimal

Octal

Hexa decimal

Binary

Which is 1's compliment of 0111

1000

1111

1100

0001

The most widely used alpha numeric code is

ASCII

ASCI

Unicode

none of these

Some More Computer GK for Govt Jobs

1. In a memory, the minimum time delay between the initiation of successive memory operations is : cycle time

2. The first Operating System used in Microprocessor based system was : CP/M

3. The Boolean expression A(B+C)+AB+AC is independent of the Boolean variable : B

4. A byte addressable computer has memory capacity of 4096 KB and can perform 64 operations. An instruction involving 3 memory operands and one operator needs :

72 bits

5. Which addressing mode used in an instruction of the form ADD X, Y : Absolute

6. The addressing mode used in the stack related instruction PUSH B is : Register indirect

7. Parallel printers use : Centronics interface

8. An assembler that runs on one machine, but generating code for another machine is called : Cross assembler

9. A computer with a 32 bit wide data bus implements its memory using 8 K x 8 static RAM chips. The smallest memory that this computer can have is : 32 KB

10. To construct a binary Mod-N counter, the number of flip-flops needs is : Log2N

11. The total number of possible ordered trees using 3 nodes A,B,C is : 12

12. The binary search algorithm is of order : log n

13. The minimum number of edges in a connected cyclic graph on N vertices is : N

14. The execution time of a recursive algorithm is given as ; T(n)=c+T(n-1), if n>1 =d, if n≤1. The order of the algorithm is : n

15. Assuming 2 sorted lists of sizes ‘S1 ’ and ‘S2’, the worst case number of comparisons needed by the merge sort algorithm is : S1+S2 -1

16. If an M x N matrix is stored in column major form, the index calculation required to access the (i, j)th entry is : M .(j-1)+i

17. Four different algorithms L1, L2, L3 and L4 with orders of log(n), log{log(n)}, n log(n) and n/log(n) respectively have been proposed to solve a specified problem.

Which of these is the best one : L2

18. The principle of locality of reference is cited to justify the usage of : Cache memory

19. On a particular system, using Quick sort, if it takes 100 msec to sort 1000 records, time taken to sort 100 records will be : 6.7msec

20. In traversing a tree using Breadth First Search, the data structure used is : Queue

21. In a data base, the column of a table is referred to as the : Attribute

22. The part of a program which accesses a shared resource and which should be executed indivisibly is called : Critical section

23. In a database design, if every non-key attribute is functionally dependent on the primary key, then the relation will be in : Third normal form

24. An attribute of one table matching the primary key of another table is known as : Foreign Key

25. Given the functional dependencies X →Y; Y→Z; X →W and Z →AB, which of the following does not hold good : W → Z

26. SQL stands for ------------ Query Language : Structured

27. In SQL databases, the memory area used for internal processing is called : Cursor

28. The number of relationships in which an entity can appear in an E-R diagram is called its : Cardinality

29. The process of analyzing, archived data to obtain tactical and strategic information is often called : Data mining

30. If a relation is in Boyce-Codd normal form, then it is also in : 3rd Normal form

31. RAID is a standard used in the design of : Disk Memory

32. In an OS, the process of buffering data intended for a peripheral device, onto a disk area, for later bulk transfer is known as : Spooling

33. Kernel in Operating System is : A set of primitive functions upon which OS functions are built.

34. Which of the following scheduling policy is most suited for a time sharing OS : Round Robin

35. For real time OS, which of the following is the most suitable scheduling scheme : Preemptive

36. In a paged memory, access times of primary and secondary memories are 10ns and 100ns respectively. If the average access time is 23.5 nsec, hit ratio is : .85

37. The size of the virtual memory depends on the size of : Address bus

38. Three processes A, B, C have peak time demands of 3, 4, 6 resource units respectively of a particular type. What is the minimum number of resources to be provided

to ensure that deadlock never occurs : 11

39. A computer has 8 MB in main memory, 128 KB cache with block size of 4KB. If direct mapping scheme is used, how many different main memory blocks can map into

a given physical cache block : 64

40. The technique that allows only one user to work with a file at a particular time is called : Locking

41. The UNIX operating system was first installed in : PDP/7

42. MS-DOS makes use of a hardware ROM containing device drivers called : BIOS

43. In UNIX, which of the following system calls transform an executable binary file into a process : Exec

44. Berkeley UNIX is popularly known as : BSD Unix

45. In UNIX, ‘grep’ program is used for implementing : Filters

46. TSR software refers to : Terminate and Stay Resident

47. Unix and MS-DOS file system differ in the following feature : Mounted file systems

48. In DOS, file allocation is carried out using : FAT

49. In UNIX ‘link’ refers to : New directory entry pointing to an existing file

50. For implementing recursion in a programming language, its compiler uses the following data structure extensively : Stack

51. In a hypothetical language, assume that all arithmetic operators have equal precedence and associate to the left. The expression 6x3-2-1x2 evaluates to : 18

52. Which of the following instructions is redundant (can be implemented by other conventional ones) : Clear x

53. BNF is a meta language for : Specifying a context free grammar

54. In JAVA language, what will be result of evaluating the expression 25 & 13 : 9

55. In JAVA , after execution of the following statements, the values of x, m, and n will be :

int x, m, n;

m=10;

n=15;

x=++m +n++; : x=26, m=11,n=16

56. What will be the output of the following JAVA code :

byte x=64, y;

y=(byte)(x<<2);

system.out.println(y); : 0

57. Hot Java is a : Web browser

58. Which of the following typecasts result in loss of information : float to int

59. JAVA toolkit package containing classes that implement platform independent GUI is : AWT

60. The JAVA language was originally called : OAK

61. A program Graph has ‘start’ and ‘end’ nodes. The total number of paths from start to end is equivalent to the -----------set of test data required to test the software

: minimum

62. In a Program Graph, ‘X’ is an if-then-else node. If the number of paths from start node to X is ‘p’ number of paths from if part to end node is ‘q’ and from else part

to end node is ’r’, the total number of possible paths through X is : P(q+r)

63. The quality of a software which causes it to continue to operate despite application of invalid input is called : Robustness

64. A program P calls 2 subprograms P1 and P2. If P1 can fail 50% of the times and P2, 40% of the times, P can fail -----------of the times : 70%

65. Consider a Program Graph (PG) with statements as nodes and control as edges. Which of the following is not true for any PG : Always acyclic

66. In program design, if the number of conditions in a decision table is ‘n’, the maximum number of rules(columns) possible is : 2n

67. In Data Flow Diagrams(DFD), the procedure of expanding a process in the DFD into a set of equivalent smaller processes is called : levelling

68. In programming languages, literal means : String Constant

69. In Object Oriented Software Design, which of the following is not true : An object can belong to 2 classes

70. Consider the program segment comprising of 3 statements :

y=x+y;

x=y-x

y=y-x where x and y are integers. Execution of these 3 statements do the following : Swap the contents of x and y

71. What will be the output of execution of the following statements in C :

for (i=3;i<15;i+=3)

{printf(“% d”, i);

++i;

} : 3 7 11

72. In C, puts (arg V[0]; prints the : File name of executable code file

73. Who is credited with the creation of WWW : Tim Berners-Lee

74. Which of the following is not a web browser : HTML

75. MIME is associated with the following : E mail

76. The mode of communication in which transmission can be bidirectional. But in only one direction at a time is called : Half Duplex

77. Error detection at the data link layer is achieved using : CRC codes

78. In Serial communication, start and stop bits are used for : Synchronization

79. In a transmitter, the unmodulated signal is known as : Baseband signal

80. In a computer network, routing issues are handled in : Network Layer

81. In a computer network, functions of dialog management and synchronization are taken care of in the : Session’s layer

82. Which of the following topologies has the highest reliability : Mesh

83. In data communications, bauds signify ---------- rate : Signaling

84. ADSL is abbreviation for : Asymmetric Digital Subscriber Line

85. The topmost layer in the ISO model that needs to be implemented in an intermediate node is the -----------layer : Network

86. VPN denotes a : Virtual Private Network

87. Data rate of a ring network is 20Mbps and signal propagates at 200m/µsec. The number of bits that can be placed on the channel of length 200km is : 20000bits

88. The frequency range over which coaxial cables are typically used is : 106 to 108 Hz

89. In internet, the well known port 21 refers to the application : FTP

90. The maximum data rate possible through a noise free 4 kHz binary channel is : 8000 bps

91. The transparency provided in a distributed system where users cannot tell how many copies of a resource exist is termed as : Replication transparency

92. Which of the following configurations can be said to be tightly coupled : Shared memory multiprocessors

93. In distributed systems, RPC stands for : Remote Procedure Call

94. Assume there are 4 file servers each with a 0.95 chance of being up at any instant. Probability of at least one being available is : 1-(.05)4

95. Which of the following category of classification of multiple computer systems is not generally used in practice : MISD

96. In a distributed system, to ensure that concurrent transactions do not interfere with each other, the transactions must have the following specific property :

Serializability

97. Translation Lookaside Buffer(TLB) is also called : Associative Memory

98. In Internet Standards Terminology, RFC refers to : Request For Comments

99. Which of the following denotes a network management protocol in an internet : SNMP

100. IEEE 802.11 is an IEEE standard for : Wireless LAN

Computer Science Questions Asked in SSC Data Entry Operator Exam

1. The banks use ................ device to minimize conversion process.

(a) Keyboard

(b) MICR

(d) Scanner

2. .................. can't be used for source of data automation.

(a) POS terminal

(b) OCR

(d) UPC

3. Under which case will intranet be an effective networking tool?

(a) In a distributed decision-making environment

(b) Where heterogeneous applications are involved

(d) In a decentralised organization

4. When an organization gives contract for development of software, it has to give data to the service provider. In Such cases, the ownership of data should be_________

(a) Transferred to the service provider

(b) With the client/organization that outsource services

(d) Not transferred

5. A modem performs_________

(a) Modulation

(b) Demodulation

(d) All of these

6. Which of the following is NOT done by modem?

(a) Transmission Speed

(b) Data Accuracy

(b) Error detection and Correction

(d) Data Compression

7. A program coded in programming language is____________.

(a) Target code

(b) Source code

(d) None of these

8. "Platform" in computer world means___________.

(a) Computer hardware used

(b) Operating Systems used

(d) None of these

9. Which of these biometric tools use thermal sensors along with infrared rays for identification?

(a) Key stroke dynamics

(b) Iris Retinal scans

(d)Fingerprint scanning

10. What is incorrect about software?

(a) It can manipulate computer

(b) It has programs, instructions

(d) It can be touched

11. Disadvantage of distributed database is.

(a) Unreliability

(b) Easy implementation

(d) High communication cost

12. Which of the following transmission techniques let computer to alternatively send and receive data?

(a) Simplex

(b) Half duplex

(d) Multiplexing

13. What is NOT a feature of networking?

(a) Reliability

(b) Greater storage space

(d) All are features of networking

14. Taking back-up of a file against crash is a

(a) Preventive measure

(b) Curative measure

(d) None of these

15. A memory that is referred by its contents instead of physical address is called ________

(a) Associative memory

(b) Content addressable storage

(d) None of these

16. Most dangerous risk in leaking of information is :

(a) Ready access to online terminals

(b) Online processing of data

(d) All of these

17. A camera is an

(a) Input device

(b) Can be either input or output

(b) Output device

18. Using anti-virus software is

(a) Preventive measure

(b) Detective measure

(d) All the above

19. An online transaction is

(a) One that is done in real time

(b) Transaction done via internet

(d) None of these

20. A clerk in a bank has to access data n customer account. Logical access control for these users would be.

(a) Use of individual passwords

(b) Use of an Accounts Receivable Section password

(d) Can't say

21. To stop unauthorized access to the computer system we should

(a) Have a trustworthy system administrator

(b) Have a good passwords policy

(d) All of the above

22. Which cannot assure data accuracy in an application?

(a) Limit and reasonableness test

(b) Echo checking

(d) None of these

23. Maximum storage space is available on

(a) CDs

(b) ROM

(d) Floppies

24. Jon Von Neumann developed:

(a) First electronic chip flip flop

(b) Stored-program concept

(d) None of these

25. Which of the following is single user computer with many features and good processing power?

(a) Minicomputer

(b) Workstation

(d) None of these

Computer Objective Questions

PSC Solved Paper.

1. _________ is a powder used in laser printers to form the images on a paper.

Toner

2. Worms and Trojan Horses are examples of:

Malware

3. ___________ Printers work by selectively heating regions of special heat-sensitive paper.

Thermal

4.The ISI mark is given by:

BIS

5. The laser printer was invented at:

Xerox

7. A flaw in a system whereby the output is unexpectedly dependent on the sequence or timing of other events is called a:

Race condition

8. A 56k modem can transfer data at up to bits per second over the phone line.

56000

9. The original implementation of the C programming language was standardized by :

ANSI

10. ________Is a signaling method that handles a relatively wide range of frequencies.

Broadband

11. The port number used by SMTP is:

13. A packet filter is a type of

Firewall

15. Which among the following utilities can detect a bad sector?

CHKDSK and SCANDISK

16. In 100BASE-T, 'T' stands for:

Twisted pair

17. A head crash is said to occur when the read-write head of a hard disk drive:

Touches the magnetic media

18. Category 5 cable includes ---twisted pairs in a single cable jacket.

19. The port number used by the HTTP protocol is

20. In PowerPoint presentations, individual pages are called:

Slides

21. Power-on-self-test is built into the:

BIOS

22. PowerPoint can embed content from other applications through:

OLE

23. The latest release of Microsoft Windows is called:

Vista

24. GRUB is an:

Boot loader

25. __________Is a family of programmable interrupt controller chips.

8259

26.card allows television signals to be received by a computer.

TV tuner

27. ________Is an IEEE 1394 implementation.

Fire Wire

28 'Windows protection error' messages may result from:

Damage to the system registry

29 Sound Blaster line of audio cards were made by :

Creative Technology Ltd.

31 Indiscriminate sending of unsolicited bulk messages is known as :

Spamming

32 The 'blue screen of death' may occur due to:

All the above

33 FAT manages files in contiguous groups of sectors called:

Clusters

34 The utility which can be used to clean the windows registry is:

regedit

36. Ultra Wide SCSI had a throughput of: (A) 10 MB/s

40 MB/s

37. A dual-core processor has L1 cache.

40. Port 110 is used by _______

POP3

41. A file extension .ogg indicates an ______format

Audio codec

42. Kerberos ts a__________protocol.

Network authentication

43. Athlon series of processors are made by:

AMD

44. Which among the following is a real-time operating system?

QNX

45. The internet top level domain .cn refers to :

China

47. _____________ Is a protocol used by networked computers (clients) to obtain IP addresses and other parameters from a server.

DHCP

48. is the brand name for 64-bit Intel microprocessors with IA-64 architecture.

Itanium

49. is an organization which develops internet standards through RFCs.

IETF

50. The ability to replace components of a computer, while it is operating, is called:

Hot swapping

E&OE

MCQs on Computer Knowledge

1. All of the following are examples of real security and privacy risks EXCEPT:

a) hackers

b) Spam*

c) Viruses

d) Identity theft

Answer 1:

Spam is the use of electronic messaging systems (including most broadcast media, digital delivery systems) to send unsolicited bulk messages indiscriminately. While the most widely recognized form of spam is e-mail spam, the term is applied to similar abuses in other media: instant messaging spam, Usenet newsgroup spam, Web search engine spam, spam in blogs, wiki spam, online classified ads spam, mobile phone messaging spam, Internet forum spam, junk fax transmissions, social networking spam, television advertising and file sharing network spam.

2. A process known as ____________ is used by large retailers to study trends.

a) data mining*

b) data selection

c) POS

d) Data conversion

Answer 2:

Data mining, a branch of computer science and artificial intelligence, is the process of extracting patterns from data. Data mining is seen as an increasingly important tool by modern business to transform data into business intelligence giving an informational advantage. It is currently used in a wide range of profiling practices, such as marketing, surveillance, fraud detection, and scientific discovery

3. ________ terminals (formerly known as cash registers) are often connected to complex inventory and sales computer systems.

a) Data Card Reader

b) Point-of-sale (POS)*

c) Sales inventory

d) Magnetic Swipe Reader

Answer 3:

Point-of-sale (POS) terminals (formerly known as cash registers) are often connected to complex inventory and sales computer systems. Magnetic Swipe Reader: Reads the magnetic strip on the back of a credit or debit card. The information stored on the magnetic strip includes the credit card number, expiration date, customer name, and address. The information is transmitted to a credit card processing network through the point-of-sale system for payment of merchandise.

4. A(n) _______ system is a small, wireless handheld computer that scans an items tag and pulls up the current price (and any special offers) as you shop.

a) BCS*

b) POS

c) Data retrieval

d) Data mining

Answer 4:

Bar Code Scanner: A laser type of device (gun style, counter style) that when triggered over a bar code, converts bar code lines into numbers. This number or SKU (Stock Keeping Unit) is then transmitted back to the POS computer for automatic price lookup

5. The ability to recover and read deleted or damaged files from a criminal computer is an example of a law enforcement speciality is called:

a) robotics

b) simulation

c) computer forensics*

d) animation

Answer 5:

Computer forensics is a branch of digital forensic science pertaining to legal evidence found in computers and digital storage media. The goal of computer forensics is to examine digital media in a forensically sound manner with the aim of preserving, recovering, analyzing and presenting facts and opinions about the information. Although it is most often associated with the investigation of a wide variety of computer crime, computer forensics may also be used in civil proceedings. The discipline involves similar techniques and principles to data recovery, but with additional guidelines and practices designed to create a legal audit trail.

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