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1.  
Which of these is an example of an embedded computer?

Correct Answer: C [the controller inside a washing machine]

Explanation:

Embedded = special-purpose computer built into another device.

2.  
Consider the following statements:
I. EPROM is erased by ultraviolet light.
II. Cache memory is slower than main memory.
III. SSD has no moving parts.
Which of the statements given above is/are correct?

Correct Answer: D [Only I and III]

Explanation:

I and III true; II false – cache is faster than RAM.

3.  
Odd one out:

Correct Answer: D [Projector]

Explanation:

Projector is output; the rest are input devices.

4.  
x = 4; repeat for i = 1, 2, 3: x = x × 2 − i. What is x at the end?

Correct Answer: B [21]

Explanation:

i=1: 7; i=2: 12; i=3: 21.

5.  
Which type of language uses mnemonics such as ADD and MOV?

Correct Answer: E [Assembly language]

Explanation:

Assembly (2nd generation) uses mnemonics.

6.  
Stretch – Four jobs with burst times 7, 2, 5 and 1 ms arrive together. Using non-pre-emptive SJF, what is the average waiting time?

Correct Answer: C [3 ms]

Explanation:

Order 1, 2, 5, 7 → waits 0, 1, 3, 8 → 12 ÷ 4 = 3 ms.

7.  
Stretch – After chmod 754 report.sh, the permission string of the file is:

Correct Answer: A [rwxr-xr--]

Explanation:

7 = rwx, 5 = r-x, 4 = r--.

8.  
C1:C6 contain 45, 0, (blank), 72, the text NA, and 18. What does =COUNT(C1:C6) return?

Correct Answer: E [4]

Explanation:

COUNT counts numeric cells: 45, 0, 72, 18 → 4 (blank and text skipped).

9.  
In Excel, a formula in D2 is =$B2*C$1. When copied to E3 it becomes:

Correct Answer: C [=$B3*D$1]

Explanation:

$B stays, row 2→3; C→D, $1 stays.

10.  
1101₂ + 17₈ + 1A₁₆ = ? (in decimal)

Correct Answer: A [54]

Explanation:

13 + 15 + 26 = 54.

11.  
Stretch – For Y = NAND(A XOR B, C), in how many of the 8 input rows is Y = 1?

Correct Answer: B [6]

Explanation:

Y = 0 only when A XOR B = 1 and C = 1 (2 rows) → 6.

12.  
The range of a 6-bit number in 2's complement form is:

Correct Answer: D [−32 to +31]

Explanation:

−2⁵ to 2⁵ − 1.

13.  
Stretch – What is the network address of 172.18.200.77 with subnet mask 255.255.240.0?

Correct Answer: A [172.18.192.0]

Explanation:

200 AND 240 = 11001000 AND 11110000 = 11000000 = 192.

14.  
Which protocol gives a secure, encrypted remote login to another computer?

Correct Answer: D [SSH]

Explanation:

SSH = Secure Shell (port 22); Telnet is the older, unencrypted login.

15.  

Directions: The next 2 questions use the table TXN:

TxnID Mode Amount Status
1 UPI 1200 OK
2 NEFT 50000 OK
3 UPI 800 FAILED
4 IMPS 15000 OK
5 UPI 2500 OK
6 RTGS 400000 OK
7 NEFT 75000 PENDING
8 IMPS 9000 FAILED
SELECT COUNT(*) FROM TXN WHERE Status <> 'OK'; returns:

Correct Answer: C [3]

Explanation:

FAILED 3, FAILED 8, PENDING 7 → 3.

16.  
SELECT SUM(Amount) FROM TXN WHERE Mode = 'UPI' AND Status = 'OK'; returns:

Correct Answer: B [3700]

Explanation:

UPI OK rows: 1200 + 2500 = 3700 (800 failed).

17.  
Stretch – Using a Caesar shift of 7, the word PIN becomes:

Correct Answer: E [WPU]

Explanation:

P(15)+7 = 22 W; I → P; N(13)+7 = 20 U.

18.  
CERT-In is designated as the national agency for responding to cyber security incidents under which section of the IT Act, 2000?

Correct Answer: D [Section 70B]

Explanation:

Section 70B (MHA, Lok Sabha USQ 5124, 24 March 2026); 66A was struck down in 2015.

19.  
Using the RBI's RTGS minimum (Chapter 10, dated box), which amount is the smallest that can be sent by RTGS?

Correct Answer: C [₹ 2,00,000]

Explanation:

Minimum ₹ 2,00,000 – ₹ 1,95,000 is below it.

20.  
In the abbreviation EEPROM, how many words begin with the letter E?

Correct Answer: E [2]

Explanation:

Electrically Erasable Programmable Read-Only Memory.

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