NCO Class 4 Practice Paper Set 2 with Answers | SOF Cyber Olympiad 2026
Download NCO Class 4 Practice Paper Set 2 Word file with detailed answer key and explanations. Perfect free study material for SOF Cyber Olympiad preparation.
■ SECTION 1: LOGICAL REASONING (Q1 – Q10) (1 Mark Each)
1. Find the next number in the pattern: 5, 11, 23, 47, ?
A. 95 B. 94
C. 85 D. 96
2. Rahul is facing East. He turns 1/2 turn clockwise, then 1/4 turn anticlockwise. Which direction is he facing now?
A. North B. South
C. West D. East
3. Which option represents the correct mirror image of ‘SEARCH’ when the mirror is placed vertically on the right?
A. HƆЯAƎS B. HƆRAƎS
C. HCRAES D. ƎƆЯAƎS
4. If ‘Laptop’ is called ‘Desktop’, ‘Desktop’ is called ‘Tablet’, and ‘Tablet’ is called ‘Mobile’, which device is lightest and fits in a palm?
A. Tablet B. Mobile
C. Desktop D. Laptop
5. Select the odd one out.
A. Scanner B. Microphone
C. Speaker D. Web Camera
6. How many lines of symmetry are there in a circle?
A. 1 B. 2
C. 4 D. Infinite
7. In a row of 15 children, Amit is 6th from the right end. What is his position from the left end?
A. 9th B. 10th
C. 11th D. 8th
8. Find the missing letter in the pattern: C, F, I, L, ?
A. N B. O
C. M D. P
9. If 1st September 2026 is Tuesday, what day will 10th September 2026 be?
A. Wednesday B. Thursday
C. Friday D. Tuesday
10. Which figure completes the pattern in 3×3 grid: Row 1 (2, 4, 8), Row 2 (3, 6, 12), Row 3 (4, 8, ?)?
A. 12 B. 14
C. 16 D. 20
■ SECTION 2: COMPUTERS & INFORMATION TECHNOLOGY (Q11 – Q30) (1 Mark Each)
11. Which shortcut key is used to Undo the last action in MS-Word 2010?
A. Ctrl + Y B. Ctrl + Z
C. Ctrl + U D. Ctrl + X
12. Which device reads special magnetic ink characters printed at the bottom of bank cheques?
A. OMR B. Barcode Reader
C. MICR D. OCR
13. Which generation of computers introduced Transistors replacing Vacuum Tubes?
A. First Generation B. Second Generation
C. Third Generation D. Fourth Generation
14. Which tool in MS-Paint is used to zoom in or out of a drawing?
A. Magnifier B. Color Picker
C. Brush D. Select
15. What is the full form of RAM?
A. Read Access Memory B. Random Access Memory
C. Rapid Access Memory D. Read Auto Memory
16. Which network connects computers within a single room, office, or building?
A. LAN B. MAN
C. WAN D. PAN
17. Which feature in MS-Word 2010 automatically highlights misspelled words with a red squiggly line?
A. Thesaurus B. AutoCorrect
C. Spelling & Grammar D. Word Count
18. How many Bits make 1 Byte?
A. 4 Bits B. 8 Bits
C. 16 Bits D. 1024 Bits
19. Which secondary storage device uses optical laser technology to read/write data?
A. Hard Disk B. DVD
C. Pen Drive D. Magnetic Tape
20. Which operating system is developed by Apple Inc. for Macintosh desktop computers?
A. Windows 10 B. Linux
C. macOS D. Android
21. Which function key is pressed to save a file with a new name (Save As) in many applications?
A. F2 B. F7
C. F12 D. F5
22. Which device acts as both an input and output device in modern smartphones?
A. Keyboard B. Touchscreen
C. Speaker D. Printer
23. Which tool in MS-Word 2010 allows you to copy formatting from one text and apply it to another?
A. Format Painter B. Copy Paste
C. Font Styles D. Text Effects
24. Who is known as the ‘Father of Modern Computers’?
A. Alan Turing B. Charles Babbage
C. Bill Gates D. Steve Jobs
25. Which feature of Windows 7 provides a quick peek at the desktop by hovering over the bottom-right corner of the taskbar?
A. Aero Shake B. Aero Peek
C. Aero Snap D. Jump List
26. What does WWW stand for in web terminology?
A. World Wide Web B. Wide World Web
C. World Web Wide D. Web World Wide
27. Which formatting option places text slightly above the regular line of text (e.g., 1st, X²)?
A. Subscript B. Superscript
C. Highlight D. Bold
28. Which component of the CPU performs mathematical calculations (addition, subtraction) and logical comparisons?
A. Control Unit (CU) B. Arithmetic Logic Unit (ALU)
C. Memory Unit (MU) D. Registers
29. Which short-range wireless technology connects wireless headphones and smartwatches to smartphones?
A. Wi-Fi B. Bluetooth
C. Infrared D. Satellite
30. Which option in MS-Paint creates a mirror image of an object horizontally?
A. Rotate 180° B. Flip Vertical
C. Flip Horizontal D. Skew 30°
■ SECTION 3: ACHIEVERS SECTION (Q31 – Q35) (2 Marks Each)
31. Match Column-I with Column-II regarding Computer Generations:
Column-I:
(a) 1st Gen (b) 2nd Gen (c) 3rd Gen
Column-II:
(i) Integrated Circuits (ICs) (ii) Vacuum Tubes (iii) Transistors
A. (a)-(ii), (b)-(iii), (c)-(i) B. (a)-(i), (b)-(ii), (c)-(iii)
C. (a)-(iii), (b)-(i), (c)-(ii) D. (a)-(ii), (b)-(i), (c)-(iii)
32. Read the statements:
Statement 1: ROM is permanent and non-volatile memory.
Statement 2: RAM retains data even when the computer is powered off.
A. Both statements are true B. Both statements are false
C. Statement 1 is true, Statement 2 is false D. Statement 1 is false, Statement 2 is true
33. What is the keyboard shortcut to change selected text to ALL UPPERCASE in MS-Word 2010?
A. Ctrl + U B. Shift + F3
C. Ctrl + Shift + A D. Both B and C
34. Which sequence of operations in MS-Paint will invert a right-pointing arrow to point to the left?
A. Flip Vertical B. Flip Horizontal
C. Rotate 180° D. Skew Vertical
35. Identify the network type: ‘Connecting multiple branches of a bank across different cities in India.’
A. LAN B. MAN
C. WAN D. PAN
ANSWER KEY & DETAILED EXPLANATIONS
Q. No. Correct Option Explanation / Reason
1 A Pattern is (Previous × 2) + 1: 5×2+1=11, 11×2+1=23, 23×2+1=47, 47×2+1=95.
2 B Facing East: 1/2 turn clockwise = West. From West, 1/4 turn anticlockwise = South.
3 A Vertical mirror reflection flips letters horizontally: S->Ǝ, E->A, A->Я, R->Ɔ, C->H (reversed sequence HƆЯAƎS).
4 A Tablet fits in a palm/lightest among given context, and ‘Tablet’ is called ‘Mobile’.
5 C Speaker is an output device, whereas Scanner, Microphone, and Web Camera are input devices.
6 D A circle has an infinite number of lines of symmetry passing through its center.
7 B Position from left = (Total – Position from right) + 1 = (15 – 6) + 1 = 10th.
8 B Letters increase by 3 positions: C(+3)->F(+3)->I(+3)->L(+3)->O.
9 B 1st to 10th is 9 days gap. 9 mod 7 = 2 days forward from Tuesday = Thursday.
10 C Pattern in each row: Numbers double (x2): 4, 8, 16.
11 B Ctrl + Z is the shortcut key to Undo.
12 C MICR (Magnetic Ink Character Recognition) reads magnetic ink numbers on bank cheques.
13 B Second generation computers (1956-1963) used transistors.
14 A Magnifier tool zooms in or zooms out of a drawing in MS-Paint.
15 B RAM stands for Random Access Memory.
16 A LAN (Local Area Network) covers a small area like a room, office, or building.
17 C Spelling & Grammar tool checks for spelling errors and highlights them in red.
18 B 8 Bits = 1 Byte.
19 B DVD is an optical storage device that uses lasers to read/write data.
20 C macOS is the proprietary operating system developed by Apple for Mac computers.
21 C F12 opens the ‘Save As’ dialog box in MS-Office applications.
22 B Touchscreen acts as an input device (touch sensors) and output device (display).
23 A Format Painter copies character/paragraph formatting from selected text.
24 B Charles Babbage is universally regarded as the Father of Modern Computers.
25 B Aero Peek displays desktop background when hovering over Show Desktop button.
26 A WWW stands for World Wide Web.
27 B Superscript places text slightly above the baseline (e.g., X²).
28 B ALU (Arithmetic Logic Unit) executes all arithmetic calculations and logical decisions.
29 B Bluetooth is a short-range wireless protocol used for personal device connectivity.
30 C Flip Horizontal produces a left-to-right mirror image.
31 A 1st Gen = Vacuum Tubes (a-ii); 2nd Gen = Transistors (b-iii); 3rd Gen = ICs (c-i).
32 C Statement 1 is true (ROM is permanent non-volatile). Statement 2 is false (RAM loses data without power).
33 D In MS-Word, both Shift + F3 (cycles case) and Ctrl + Shift + A toggle ALL CAPS.
34 B Flip Horizontal turns a right-pointing object to face left.
35 C WAN (Wide Area Network) connects computers/branches across different cities and countries.