RRB JE Stage 2 Computer and Applications Questions Part 1 Previous year Questions with answers and explanation

1. PREVIOUS YEARS QUESTIONS WITH
ANSWER AND EXPLANATION
Part - 1
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2. Optical Character Reader(OCR)
OCR is an input device used to read a printed text. OCR scans text
optically character by character, converts them into a machine
readable code and stores the text on the system memory.
Answer: (a)

3. 3
Answer: (a)

4. 4

5. 5

6. 6
Answer: (c)

7. 7
Block Diagram of Computer

8. 8
Answer: (b)

9. 9
Answer: (c)

10. 10
A Turing machine is a mathematical model of computation that
defines an abstract machine, which manipulates symbols on a
strip of tape according to a table of rules.
Despite the model's simplicity, given any computer algorithm, a
Turing machine capable of simulating that algorithm's logic can
be constructed.
Answer: (c)

11. 11

12. 12
Answer: (b)

13.  In computer, any characters like alphabet, digit or any
special character is represented by collection of 0’ and 1’ in
a unique coded pattern.
 In computers, the code is made up of fixed size groups of
binary positions.
 The binary coding schemes that are most commonly used
are as follows:
1. Binary coded decimal (BCD).
2. American standard code for information interchange (ASCII).
3. Extended binary coded decimal interchange code (EBCDIC).
4. UNICODE.
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14.  Binary coded decimal is a number system where four bits are used to
represent each decimal digits.
 BCD is a method of using binary digits to represent the decimal digits (0-9).
 In BCD system, there is no limit on size of a number.
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48 – 0100 1000

15.  ASCII characters are represented by seven bits.
 These are standard character codes used to store data so that it
may be used by other software programs.
 The standard ASCII codes defines 128 character code (from 0
to 127).
 Basically, ASCII codes are of two types:
 ASCII-7 : it is a 7-bit standard ASCII code, it allows = 128
unique symbols.
 ASCII-8 : It is an extended version of ASCII-7. It is an 8-bit
code, it allows = 256 symbols or characters.
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16.  In EBCDIC, characters are represented by eight bits.
 These codes store information which is readable by other
computers.
 It allows 2^8 =256 combinations of bits.
16
It uses 16-bits to represent a symbol in the data.
It represents any non-english character like Chinese,
Japanese

17. 17
In cryptography, encryption is the process of encoding a message
or information in such a way that only authorized parties can
access it and those who are not authorized cannot.
Encryption does not itself prevent interference, but denies the
intelligible content to a would-be interceptor.
Answer: (d)

18. 18

19. 19
Answer: (a)

20. 20

21. 21
Answer: (d)

22. 22
Answer: (d)

23. 23
Answer: (a)

24. 24
Answer: (c)

25. 25
Answer: (d)

26. 26
Answer: (a)

27. 27
Answer: (b)

28. 28
Answer: (b)

29. 29
Answer: (c)

30. 30
Answer: (a)

31. 31

32. 32
Transient data : Data that is created within an application
session. At the end of the session, it is discarded or reset back to
its default and not stored in a database.
Answer: (d)

33. 33
Answer: (d)

34. 34
Answer: (a)

35. 35
Answer: (c)

36. 36

37. 37
Answer: (a)

38. 38
Answer: (c)

39. 39
Answer: (c)

40. 40
• VIRUS: Vital Information Resource Under Siege.
• A piece of software that infects programs (Modify, Delete)
• Replicates itself.
• Easily spread from one software / file to another
• Viruses are copied itself and attached itself to other programs
which further spread the infection.
• The virus can affect or attack any part of the computer software
such as: Boot block Files, Operating systems, Application
program
Answer: (b)

41. 41
EFFECTS OF VIRUS
Depending on the types of virus their effects on the computer are:
• Destroy all data on your local disk.
• Slow down your computer performance.
• Monitor what are you doing.
• Download illegal files onto your computer without being able to delete
them.
• Generates IP address randomly and sends those IP address automatically.
• Steal confidential information like password, account number, credit card
information by random e-mailing.
• May increase or decrease memory size.
• Display different types of error messages.
• Alter PC settings.
• Cause computer to make strange noises make music, clicking noises or
beeps.

42. 42
Ctrl + C – Copy
Ctrl + E - Center text
Ctrl + F - NavPaneSearch
Ctrl + X - Cut
Answer: (b)

43. 43
Ctrl+0 Toggles 6pts of spacing before a paragraph.
Ctrl+A Select all contents of the page.
Ctrl+B Bold highlighted selection.
Ctrl+C Copy selected text.
Ctrl+D Open the font preferences window.
Ctrl+E Aligns the line or selected text to the center of the screen.
Ctrl+F Open find box.
Ctrl+I Italic highlighted selection.
Ctrl+J Aligns the selected text or line to justify the screen.
Ctrl+K Insert a hyperlink.
Ctrl+L Aligns the line or selected text to the left of the screen.
Ctrl+M Indent the paragraph.
Ctrl+N Opens new, blank document window.
Ctrl+O Opens the dialog box or page for selecting a file to open.
Ctrl+P Open the print window.
Ctrl+R Aligns the line or selected text to the right of the screen.
Ctrl+S Save the open document. Like Shift+F12.

44. 44
Alt, F, A Save the document under a different file name.
Ctrl+T Create a hanging indent.
Ctrl+U Underline the selected text.
Ctrl+V Paste.
Ctrl+W Close the currently open document.
Ctrl+X Cut selected text.
Ctrl+Y Redo the last action performed.
Ctrl+Z Undo last action.

45. 45
Answer: (b)

46. 46

47. 47
What is inode number in Linux
• Inode number also called index number, it consists following attributes.
• File types ( executable, block special etc )
• Permissions ( read, write etc )
• UID ( Owner )
• GID ( Group )
• FileSize
• Time stamps including last access,
last modification and last inode number change.
• File deletion time
• Number of links ( soft/hard )
• Location of ile on harddisk.
• Some other metadata about file.
Answer: (d)

48. 48
Will Continue in Part 2