SSC CGL Computer – Number Systems & Data Representation (optional) – Level 3 · Challenge

← Back

SSC CGL Computer – Number Systems & Data Representation (optional) – Level 3 · Challenge – 8 questions, subject: Computer Knowledge. Every question has the correct answer with a one-line explanation; tap "Show Answer". Free practice for TNPSC, UPSC, SSC, Bank and RRB exams – Shanmugam IAS Academy, Coimbatore.

Get daily current affairs & exam alerts – follow us YouTube WhatsApp Channel Telegram Channel Facebook Page Instagram
Share with friends & study groups
Link to this page from your website / blog (HTML code)
1.  
(2B6)₁₆ in decimal is:

Correct Answer: D [694]

Explanation:

2 × 256 + 11 × 16 + 6 = 512 + 176 + 6 = 694.

2.  
(65)₈ in hexadecimal is:

Correct Answer: B [(35)₁₆]

Explanation:

Answer: (35)₁₆. 110 101 → 0011 0101 → 35.

3.  
The decimal fraction 0.8125 in binary is:

Correct Answer: C [(0.1101)₂]

Explanation:

0.8125 × 2 = 1.625 (1), 0.625 × 2 = 1.25 (1), 0.25 × 2 = 0.5 (0), 0.5 × 2 = 1.0 (1) → 0.1101.

4.  
The ASCII code of 'K' is 75. What is the ASCII code of 'k'?

Correct Answer: A [107]

Explanation:

Small letter = capital + 32 → 107.

5.  
True/False countHow many are true?
(i) ASCII is a 7-bit code.
(ii) In BCD, 59 is written 0101 1001.
(iii) EBCDIC is a 16-bit code.
(iv) UTF-8 uses 1 to 4 bytes per character.

Correct Answer: B [3]

Explanation:

(iii) is false – EBCDIC is an 8-bit IBM code; the others are true.

6.  
Fill in the blankThe gate whose output is 1 only when both inputs are 0 is the ______ gate.

Correct Answer: D [NOR]

Explanation:

NOR = NOT OR; OR is 0 only for (0, 0), so NOR is 1 only then.

7.  
Spot My MistakeA student converts 22 to binary and reads the remainders (0, 1, 1, 0, 1) from top to bottom, writing 01101. The correct answer is:

Correct Answer: B [(10110)₂]

Explanation:

Read remainders bottom-up: 10110 = 16 + 4 + 2 = 22.

8.  
(110)₂ × (11)₂ = ?

Correct Answer: C [(10010)₂]

Explanation:

Answer: (10010)₂. 6 × 3 = 18 = 10010.

➤ Full notes, shortcuts and every answer explained – SSC CGL 2026 Computer Knowledge book (₹149): www.shanmugamiasacademy.in/study-materials/ssc-cgl-computer-knowledge

📘 SSC CGL 2026 – Computer Knowledge (Tier II Paper I – Section III)
Here you get the answer with a one-line explanation. 672 original questions with answer key and explanations · notes, figures, shortcut keys and memory aids · practice sets + 3 Computer Knowledge mock tests
Get the book – ₹149 ₹299 →
Score: 0 Answered: 0 / 0