COMPUTER KNOWLEDGE

161. What is the shortcut key to select all in MS-Excel?
(a) Ctrl + S
(b) Ctrl + A
(c) Alt + A
(d) Alt + S

162. ________ is not a storage medium.
(a) CD
(b) DVD
(c) Hard disk
(d) Monitor

163. Which part of the Computer performs arithmetical calculations?
(a) Monitor
(b) Memory
(c) ALU
(d) CPU

164. OCR stands for:
(a) Optical Character Recognition
(b) Original Coding Recognizer
(c) Original Character Reader
(d) Optional Coding Recognizer

165. What is the first step in the transaction cycle?
(a) Data transfer
(b) Data entry
(c) Audit
(d) None of these




166. What is Output?
(a) Processor takes from the user
(b) The user gives to the processor
(c) The processor gets from the user
(d) The processor gives to the user

167. Help menu is available at button
(a) Start
(b) Turf off
(c) End
(d) Restart

168. Short cut Key to open a new database is
(a) Ctrl+ N
(b) Ctrl + S
(c) Ctrl + Z
(d) Ctrl + V

169. Short cut Key to open an existing database is
(a) Ctrl+ N
(b) Ctrl + O
(c) Ctrl + Z
(d) Ctrl + V

170. Short Cut Key to quit Microsoft Access
(a) Alt + F5
(b) Alt + F4
(c) Alt + F2
(d) Alt + F1

171. A pixel is a
(a) Picture element or dot on a screen.
(b) Point of ink on a laser printed page.
(c) Point of ink on an ink jet-printed page.
(d) None of these

172. Which is the correct format to save the web pages?
(a) html://
(b) http://
(c) HTML
(d) URL

173. ‘WWW stands for:
(a) World Wide Web
(b) World Work Web
(c) Work Wide Web
(d) Work White Web

                        

174. How we can measure the display size of a monitor
(a) Diagonally
(b) Vertically
(c) Horizontally
(d) None of these

175. LCD stands for:
(a) Liquid Crystal Display
(b) Legal Crystal Display
(c) Liquid Computer Display
(d) Local Crystal Display

176. Which algorithm is used for data integrity?
(a) SED
(b) AES
(c) MD5
(d) None of these

177. Which is not a form of Biometrics?
(a) Fingerprint
(b) Retina scan
(c) Password
(d) None of these

178. _____ is called the permanent memory in computer.
(a) DVD
(b) RAM
(c) ROM
(d) CPU

179. What type of device is a 31/2 inch floppy drive?
(a) Input
(b) Output
(c) Software
(d) Storage
(e) None of these

180. Each cell in a Microsoft Office Excel documents is referred to by its cell address, which is
the:
(a) Cell’s column label and worksheet tab name
(b) Cell’s column label
(c) Cell’s row label
(d) Cell’s row and column labels
(e) Cell’s contents

181. The access method used for magnetic tape is .
(a) Sequential
(b) Direct
(c) None of the above
(d) Random
(e) All

182. The difference between memory and storage is that the memory is and storage is
(a) Permanent, temporary
(b) Slow, fast
(c) Temporary, permanent
(d) None of the above
(e) All

183. Which of the following devices can be used to directly input printed text
(a) OMR
(b) OCR
(c) MICR
(d) None of the above
(e) All

184. A floppy disk contains
(a) Sector Only
(b) Both circular tracks and sectors
(c) Circular tracks only
(d) None of the above
(e) All

185. CD-ROM is a
(a) Memory register
(b) Semiconductor memory
(c) Magnetic memory
(d) None of the above
(e) All

186. Which of the following is used as a primary storage device
(a) PROM
(b) Magnetic tape
(c) Floppy disk
(d) None of the above
(e) All

187. Operating system is
(a) A collection of input-output devices
(b) A collection of software routines
(c) A collection of hardware components
(d) None of the above
(e) All

188. Operating system
(a) Provides a layered, user-friendly interface
(b) Link a program with subroutines it references
(c) Enables a programmer to draw a flowchart
(d) None of the above
(e) All

189. Modem stands for
(a) Modulator demodulator
(b) Mainframe operating device memory
(c) A type of secondary memory
(d) None of the above
(e) All
                                                                   
                                                               
190. Wide area networks (WANs) always require
(a) High speed processors
(b) Same type
(c) High bandwidth communication source link
(d) None of the above
(e) All

191. Bug means
(a) A difficult syntax error in a program
(b) A logical error in a program
(c) Documenting programs using an efficient documentation too
(d) None of the above
(e) All

192. C is-
(a) A low level language
(b) A third generation high level language
(c) A machine language
(d) None of the above
(e) An assembly language

193. The communication line between the CPU, memory and peripherals is called a
(a) Bus
(b) Media
(c) Wire
(d) Line
(e) None of these

194. One thousand bytes represent a
(a) Terabyte
(b) Kilobyte
(c) Gigabyte
(d) Megabyte
(e) None of the above

195. A step by step procedure used to solve a problem is called
(a) Software
(b) Algorithm
(c) Operating system
(d) Application system
(e) None of the above

196. The errors that cannot be pointed out by the compiler are
(a) Syntax errors
(b) Bug
(c) Semantic errors
(d) Logical errors

197. WAN hardware includes
(a) EDF
(b) FTP
(c) Multiplexors and routers
(d) None of the above
(e) Bridger and modems

198. The central Processing Unit:
(a) Is operated from the control panel.
(b) Controls the auxiliary storage unit
(c) Is controlled by the input data entering the system
(d) None of these
(e) Controls all input, output and processing

199. Which of the following is not hardware:
(a) Magnetic tape
(b) VDU terminal
(c) Assembler
(d) None of these
(e) Printer

200. Pick out the wrong definition:
(a) Control unit-heart of a computer.
(b) COBOL-a language used for business data processing
(c) Access time-time needed to access the output
(d) None of these
(e) EDP-acronym for Electronic Data Processing

H.C.F. & L.C.M. OF NUMBERS
 
If a number x divides another number y exactly, then x is said to be a factor of y. To add, subtract, or just compare two fractions, we need to convert both fractions to a common denominator. The least common multiple is usually used, although any common multiple would work in this particular case. Here comes the concept of Least Common Multiple (L.C.M.). Also to simplify a fraction, we divide the numerator and the denominator by the same number. If we divide them by the greatest common factor, then no further simplifications are required. That greatest common factor is called the Highest Common Factor (H.C.F.) or Greatest Common Divisor (G.C.D.). Least Common Multiple (L.C.M.): The least number which is exactly divisible by each one of the given numbers is called their L.C.M. There are two methods of finding the L.C.M .of two or more than two numbers:
1. Factorization Method: In this method first resolve each one of the given numbers into a product of Prime factors. Then Least Common Multiple is the product of highest powers of all the factors.
2. Common Division Method: In this method first arrange the set of numbers in any order. Then take a number which divides exactly at least two of the given numbers and carry forward the remaining numbers which are not divisible by that particular number. Repeat the process till no two of the numbers are divisible by the same number. Then Least Common Factor is the product of the divisors and the undivided numbers.
Highest Common Factor (H.C.F.): The H.C.F. of two or more than two numbers is the greatest number that divides each of them exactly. There are two methods of finding the H.C.F. of two or more than two numbers: Factorization Method: First resolve each one of the given numbers as the product prime factors. Then H.C.F. is the product of least powers of common prime factors. Division Method: If we want to find out the H.C.F. of two numbers then divide the larger number by smaller one. Again divide the divisor by the remainder. We should repeat this process till zero is obtained as remainder. If we have three numbers then H.C.F. of {(H.C.F. of any two) and (the third number)} will be the H.C.F. of three given numbers. Important Formulas of L.C.M. and H.C.F. of Numbers – Product of two numbers =Product of their H.C.F and L.C.M.
1. H.C.F. = H.C.F.of NumeratorsL.C.M.of Denominators
2. L.C.M. = L.C.M.of NumeratorsH.C.F.of Denominators
Solved Examples 
Example 1. Find the L.C.M. of 50, 35 and 70. Solution. Let us apply the Factorization Method to find the L.C.M. of 50, 35 and 70. Express each one of the given number as the product of prime factors.
50 = 2 × 52, 35 = 5 × 7, 70 = 2 × 5 × 7. ∴L.C.M. = Product of highest powers of 2, 5 and 7 = 2 × 52 × 7 = 350. 
Example 2. Find the L.C.M. of 18, 20, 24, and 54. Solution. Let us apply Common Division Method to find the L.C.M. of 18, 20, 24, 54.

Directions: Mark the correct Answer:
1. Find the highest common factor of 54 and 36.
(a) 4
(b) 6
(c) 16
(d) 18

2. Find the lowest common multiple of 24, 20 and 30.
(a) 120
(b) 50
(c) 64
(d) 24

3. The H.C.F. of 25 , 169 , 1825 is:
(a) 4225
(b) 2225
(c) 24125
(d) 2125

4. The L.C.M. of 23 , 1627 , 512 is:
(a) 803
(b) 809
(c) 695
(d) 495

5. The ratio of two numbers is 3:4 and their H.C.F. is 4.Their L.C.M. is:
(a) 12
(b) 16
(c) 24
(d) 48

6. The L.C.M. of two numbers is 189 and H.C.F. of two numbers is 9. If one of the number is 63 then other number is:
(a) 27
(b) 28
(c) 29
(d) 30

7. The H.C.F. of 3.6, 7.2, 2.1, 0.81 is:
(a) 0.3
(b) 0.03
(c) 0.9
(d) 0.09

8. The L.C.M. of 1.8, 3.6, and 0.72 is:
(a) 3.6
(b) 11.8
(c) 0.36
(d) 10.80

9. Find the greatest number that will divide 43, 91 and 183 so as to leave the same remainder in each case
(a) 4
(b) 7
(c) 9
(d) 13

10. Three different containers contain 204 litres, 1190 litres and 1445 litres of Pepsi, Slice and Coca-Cola respectively. What biggest measure can be measured from all the different quantities of cold drinks exactly?
(a) 17
(b) 18
(c) 19
(d) 20

Answers
1. (d)
2. (a)
3. (b)
4. (a)
5. (d)
6. (a)
7. (b)
8. (d)
9. (a)
10. (a)
Solution and Explanation
1. 54 = 2×3×3×3, 36 = 3 ×2×3×2,
Therefore, H.C.F. = 2×3×3 =18.
2. 24 = 2×2 ×2×3, 20 = 2×2 ×5 , 30= 2×3×5.
Therefore, L.C.M. = products of highest powers of 2, 3 and 5 = 23 × 3 × 5 =120.
8. L.C.M. of 180, 360,72 =1080.
Therefore, L.C.M. of 1.8, 3.6, and 0.72 is 10.80
9. Required number will be = H.C.F. of (91 -43), (183 -91) and (183 – 43) = H.C.F. of 48, 92, 140 =4

ONLINE EXAM NUMERICAL ABILITY

NUMERICAL ABILITY 

SIMPLIFICATION

Some Important Concepts ‘BODMAS’ Rule: This ‘BODMAS’ Rule shows the correct sequence of all the operations that are to be executed to find out the value of a given expression. In this rule ‘B’ Stands for ‘Bracket’, ‘O’ stands for ‘of’, ‘D’ for ‘Division’, ‘M’ for ‘Multiplication’, ‘A’ for ‘Addition’ and ‘S’ for ‘Subtraction’. Therefore, the correct order to simplify an expression is:
(a) ( )
(b) {}
(c) []
(d) of
(e) Division
(f) Multiplication
(g) Addition
(h) Subtraction


Exercise
1. (-2) (-4) (5) ( 110 ) = ?
(a) 4
(b) -4
(c) 2
(d) 1
2. 7÷ 77 × 77077 =?
(a) 707
(b) 777
(c) 7007
(d) 7707
3. If 56 – [12 – {2+4 – (2+?)}] = 45.What should come at the place of ‘?’ in the equation.
(a) 3
(b) 4
(c) 5
(d) 6
4. 5? = 107
(a) 2/7
(b) 3/7
(c) 7/3
(d) 7/2
5. Evaluate: 9−2−[ 4−(1+1) ]÷2|6−2|−|3−6 |÷3.
(a) 2
(b) 3
(c) 4
(d) 5
6. How many 14s are there in 49 12 .
(a) 195
(b) 196
(c) 197
(d) 198
7. The smallest number which should be subtracted from the sum of 115, 213, and 316 to make the result a whole number is:
(a) 0.5
(b) 0.8
(c) 0.7
(d) 0.9
8. If x * y = 𝑥𝑥2 + y, then what is the value of p in the expression (2 * 4) * p = 100?
(a) 36
(b) 74
(c) 65
(d) 76
9. 5 is added to a certain number; the sum is multiplied by 3; the product is divided by 4 and 2 is subtracted from the quotient. The remainder left is 4. What will be the number?
(a) 4
(b) 5
(c) 2
(d) 3
10. 0.004 × 0.02 × 0.8 ÷ (0.2 × 0.40) =?
(a) 0.8
(b) 0.08
(c) 0.008
(d) 0.0008
11. The value of 13+13+ 13−13 is:
(a) 2689
(b) 2789
(c) 2889
(d)2589
12. Which of the following values of m and n satisfy the equation I and II.
I. 2m + 4n = 8 II. 8m + 6n = 22
(a) 1,2
(b) 2,1
(c) 1,1
(d) 2,2
13. How many pieces of 25 cm length can be cut from a 62.5 meters long Aluminum stick?
(a) 500
(b) 230
(c) 240
(d) 225
14. If one fourth of a tank holds 45 liters of milk, then the quantity of water that one third of the tank holds is:
(a) 65L
(b) 60L
(c) 62L
(d) 61L
15. A cricket team won 3 matches more than they lost. If a win gives them 2 points and loss (-1) point, how many matches, in all, have they played if their score is 23.
(a) 34 matches
(b) 35 matches
(c) 36 matches
(d) 37 matches

Answers
1. (a)
2. (c)
3. (a)
4. (d)
5. (a)
6. (d)
7. (c)
8. (a)
9. (d)
10. (d)
11. (b)
12. (a)
13. (d)
14. (b)
15. (d)


Solution and Explanation
1. Given expression is (2 × 4 × 5 ×110) = 4.
2. 7÷ 77 × 77077 =7707711= 7007
3. 56 – [12 – {2+4 – (2+?)}] = 45 ⇔ 56 – [12 – 4 –?] = 45⇔? = 3.
4. 5? = 107 ⇔? = 5 × 710⇔ ? = 72.
5. Given Expression: 9−2−[ 4−(1+1) ]÷2|6−2|−|3−6 |÷3= 7−[ 4−2 ]÷2|4|−|−3 |÷3= = 7−2÷24−3÷3= 7−14−1 = 63 = 2.
6. Required number: 49 1214 = 992 × 41 = 198.
7. Sum of all the fractions = 115 + 213 + 316 = 20130 = 6.7. The whole number just less than 6.7 is 6, then the required number = 6.7- a = 6 a = 0.7.
8. Given expression: (2 * 4) * p = 100 ⇔(4 + 4) * p = 100 ⇔64 + p = 100 ⇔p =36.
9. Suppose the required number is x then,
3 ( x+5)4 – 2 = 4 ⇔ 3(x + 5) – 8 = 16⇔x + 5 = 24/3 ⇔x = 3.
10. 0.004 × 0.02 × 0.8 0.2 × 0.40 = 648 ×10000 = 0.0008.
11. Given expression: 13+13+ 13−13 = 13+13+ 183 = 13+13+ 38 = 13+1 278 = 13+8 27 = 13+8 27 = 189 27 = 2789
12. I. 2m + 4n = 8 II.8m + 6n =22.
Multiplying (I) by 4 and subtract the (II) from (I), then we get n =1. Put n=1 in (I) then we get m=2.
13. Number of pieces = 62.5 ×10025 = 625025 = 250.
14. Suppose the capacity of the tank is x litres. Then, 14 x = 45 ⇔x = 180 ⇔13 x = 60.
15. Suppose they have lost x matches. Then, number of matches won = x+3.
∴ 2(x+3) – x = 23 ⇔x =17. Hence, total number of matches played by the team = x + (x+3) = 2x + 3 =37.

Click Here! Making Math More Fun - Math Games Package

Fun Math Games For School Or Homeschool Education - Printable Board Games, Card Games And Game Sheets For Children. Educational Games Ready For The Classroom Or Home. Makes Math Fun And Easy. Kids, Teachers And Parents All Love These Fun Math Games.

"Now You Can Have All That You Need To Make Math FUN

And EASY For Kids!"

And you won't believe how simple it is to do!

 

GET YOUR FREE MATH GAMES COLLECTION HERE

 

Sign up to receive my FREE Let's Make Math Fun Magazine and I will give you a FREE Math Games Collection- a 7 Part series containing - 2  Games Sheets, 2 Math Board Games, 2 Card Game Sets and 1 Pencil and Paper Games Set.

Click Here! Naturally Fluent English Language Program

Learn English Naturally Without Learning Grammar. Learn English Just As You Learned Your Native Language As A Child. Learn Anywhere, Anytime You Want On Your Mp3 Player, Computer, Or Car. This Program Will Make You Fluent In English.

Learn How to Speak Fluent English in only 15 minutes a day

Do you want to speak English fluently?

Is your reading ok but your speaking is terrible?

I’ve watched many students spend a lot of time and money on schools and programs that do not work.  It’s so common and it’s sad. 
The good news is that now is 2013 and things are different.  If you have a computer or an MP3 player, you can learn to speak English well in a very short time.  If you can promise to study for 15 minutes every day, then your English will improve faster than you can imagine. 
If your English is good enough to read this website, this program will be perfect for you. 
It is all about listening to real native English dialogs and conversation.  Each dialog is about a real life situation and discusses a lot of slang, idioms, and other cool vocabulary native speakers use all the time.  It is the kind of stuff you don’t learn in school.  It will help you understand English movies and speak with and understand native speakers. Our teaching style is really fun and we promise you won't get bored. We'll teach you how to remember everything you learn and how to not forget things.
The program has 100 MP3 English lessons that you can download and listen to on your to on your Ipod, Ipad, Iphone, Android phone, mp3 player, or computer.  Each lesson has a PDF of the dialog and an explanation of the important words and phrases.  Each lesson is around 10 to 15 minutes.