Correct Answer: Executing complex analytical algorithms on the raw data stream to generate synthesized high-level information for application software.

Explanation:

A standard input peripheral (like a keyboard, mouse, scanner, microphone, etc.) has limited and well-defined roles. Let’s evaluate each option:

1. Converting physical signals or human actions into digital form ✅
   → This is a primary function of input devices (e.g., keystrokes to binary signals).

2. Temporarily holding data in an internal buffer ✅
   → Input devices often use buffers to smooth data transfer to main memory.

3. Executing complex analytical algorithms to produce high-level information
   → This is not the job of an input peripheral.
   → Such processing is handled by the CPU or application software, not input devices.

4. Managing low-level communication protocols and signaling ✅
   → Input peripherals handle basic communication and error checking with the system bus.

The logical relationship involves squaring or taking the square root. 16 is related to 4 because 16 is the square of 4 (4 x 4 = 16). Similarly, 9 is related to 3 because 9 is the square of 3 (3 x 3 = 9).

Correct Answer: P(A) − P(A)P(B)

Explanation:

In a parallel circuit, the total resistance (R_t) is given by the formula:

1/R_t = 1/R₁ + 1/R₂ + 1/R₃.

Substituting the given values: 1/R_t = 1/2 + 1/3 + 1/6.

Simplifying, 1/R_t = 1.

Therefore, R_t = 1 Ω.

Correct Answer: Ruhi

Explanation (Step-by-step):

Six students are sitting around a hexagonal table, all facing the center

When facing the center, right = clockwise and left = anticlockwise (standard exam convention).

Step 1: Use statement (3)

• Ruhi is third to the left of Kamini
  ➡️ In a hexagon, the 3rd position is exactly opposite
  ➡️ Ruhi sits opposite Kamini

Step 2: Use statement (2)

• Diya is sitting exactly between Payal and Kamini
  ➡️ Diya must be an immediate neighbor of both

Step 3: Use statement (1)

• Maya is sitting exactly between Ruhi and Roshni
  ➡️ Maya is an immediate neighbor of both Ruhi and Roshni

Step 4: Use statement (4)

• Roshni is not an immediate neighbor of Payal

One correct circular arrangement (clockwise):

Kamini → Diya → Payal → Ruhi → Maya → Roshni

(All conditions are satisfied)

Correct Answer: Ethernet

Explanation:

For modern Local Area Networks (LANs), Ethernet has become the de facto standard because it best meets the requirements mentioned:

• High-speed data transfer ✅
  → Supports speeds from 10 Mbps to 100+ Gbps.

• Ease of implementation ✅
  → Simple setup, wide hardware and software support.

• Cost-effectiveness ✅
  → Inexpensive cabling (UTP), switches, and network interfaces.

• Limited geographical area ✅
  → Designed specifically for LAN environments.

Why others are not suitable:

• SONET ❌ → Used for long-distance optical backbone networks (WAN).

• ATM ❌ → Complex and costly; largely obsolete.

• Frame Relay ❌ → WAN technology, now outdated.

Correct Answer: Tamil Nadu

Explanation:

• Maharashtra has consistently been India’s largest state economy.

• Tamil Nadu has regularly ranked second by Gross State Domestic Product (GSDP) in recent financial years.

• Tamil Nadu’s economy is known for its strong diversification, with major contributions from:

  • Manufacturing (automobiles, electronics, textiles, heavy industries)

  • Services sector (IT/ITeS, finance, trade, tourism)

Why others are less suitable:

• Karnataka ❌ → Strong services/IT sector, but usually ranks below Tamil Nadu.

• Uttar Pradesh ❌ → Very large population; GSDP has grown rapidly, but has not consistently been second.

• Gujarat ❌ → Strong industrial base, but typically ranks below Tamil Nadu in overall GSDP.

Correct Answer: Function keys

Explanation:

• The keys labeled F1 to F12 on a standard keyboard are known as Function keys.

• They perform special functions depending on the software or operating system (e.g., F1 = Help, F5 = Refresh).

Why other options are incorrect:

• Alphanumeric keys ❌ → Used for letters and numbers (A–Z, 0–9).

• Toggle keys ❌ → Keys like Caps Lock, Num Lock, Scroll Lock.

• Special purpose keys ❌ → A broader category, but F1–F12 are specifically classified as Function keys.

Correct Answer: To prevent the type bars from jamming by separating commonly used letter combinations.

Explanation:

• Early mechanical typewriters had type bars that could jam or clash if adjacent keys connected to frequently used letter pairs were pressed quickly one after another.

• Christopher Latham Sholes designed the QWERTY keyboard layout specifically to separate commonly used letter combinations, reducing the chance of mechanical jamming.

• This design improved reliability, even though it did not maximize typing speed.

Why the other options are incorrect:

• Maximizing typing speed ❌ → QWERTY was not designed for speed; later layouts like Dvorak focus on speed.

• Grouping similar-sounding letters ❌ → No phonetic basis was used.

• Optimizing for Morse code ❌ → The layout was unrelated to telegraphy input.

Correct Answer: Maternal Grandfather

Explanation:

Let’s break the relations step by step:

1. A is the father of B

2. B is the brother of C
   → So, A is also the father of C

3. C is married to F

4. F is the father of D
   → Therefore, C is the mother of D

Since A is the father of C, and C is the mother of D:

➡️ A is the maternal grandfather of D