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1.  
Consider the following statements:
I. First-generation computers used vacuum tubes.
II. Integrated circuits were the main technology of the second generation.
III. Fourth-generation computers are built around microprocessors.
Which of the statements given above is/are correct?

Correct Answer: D [Only I and III]

Explanation:

I and III true; II false – ICs are third generation.

2.  
Which type of computer is mainly used by banks for processing millions of transactions for thousands of users at once?

Correct Answer: B [mainframe]

Explanation:

Mainframes – bulk transaction processing.

3.  
Arrange in order of speed, fastest first: RAM, Registers, Hard disk, Cache.

Correct Answer: D [Registers, Cache, RAM, Hard disk]

Explanation:

Registers > cache > RAM > disk.

4.  
How many kilobytes are there in 2 GB (taking 1 KB = 1024 bytes)?

Correct Answer: E [2,097,152]

Explanation:

2 GB = 2 × 1024 MB = 2 × 1024 × 1024 KB = 2,097,152 KB.

5.  
Which of these is a fourth-generation (non-procedural) language?

Correct Answer: A [SQL]

Explanation:

SQL – say what you want, not how.

6.  
Match the program with its job:
List I: (a) Linker; (b) Loader; (c) Assembler; (d) Interpreter
List II: (1) line by line; (2) assembly to machine code; (3) places program in memory; (4) joins object files

Correct Answer: C [a-4, b-3, c-2, d-1]

Explanation:

Linker joins object files; loader places in memory; assembler converts assembly; interpreter line by line.

7.  
Stretch – Three processes with burst times 6, 3 and 8 ms arrive together in that order. Under FCFS, the average waiting time is:

Correct Answer: C [5 ms]

Explanation:

Waits 0, 6, 9 → 15 ÷ 3 = 5 ms.

8.  
Which Windows feature keeps deleted files so they can be restored?

Correct Answer: B [Recycle Bin]

Explanation:

Deleted files go to the Recycle Bin first.

9.  
A1 = 12, A2 = 8, A3 = 5. What is the value of =(A1+A2)*A3/4 ?

Correct Answer: E [25]

Explanation:

(12 + 8) × 5 ÷ 4 = 100 ÷ 4 = 25.

10.  
In Excel, which shortcut switches the filter (AutoFilter) on or off for the selected data?

Correct Answer: A [Ctrl + Shift + L]

Explanation:

Ctrl + Shift + L toggles the filter; Alt + = AutoSum; Ctrl + 1 Format Cells; F4 toggles $ references.

11.  
3F₁₆ in binary is:

Correct Answer: D [111111]

Explanation:

3 = 0011, F = 1111 → 111111.

12.  
The 8-bit 2's complement of 00011010 is:

Correct Answer: B [11100110]

Explanation:

Flip → 11100101, add 1 → 11100110.

13.  
How many cables are needed to connect 9 offices in a full mesh?

Correct Answer: E [36]

Explanation:

9 × 8 ÷ 2 = 36.

14.  
Which layer of the OSI model provides end-to-end delivery and uses port numbers?

Correct Answer: A [Transport]

Explanation:

Transport (layer 4) – TCP/UDP, ports.

15.  
ROLLBACK belongs to which group of SQL commands?

Correct Answer: C [TCL]

Explanation:

COMMIT, ROLLBACK, SAVEPOINT = TCL.

16.  
An attack in which a fraudster obtains a duplicate SIM of the victim's mobile number to receive OTPs is:

Correct Answer: D [SIM swap fraud]

Explanation:

Duplicate SIM → OTPs go to the fraudster.

17.  
To verify a digital signature, the receiver uses the:

Correct Answer: B [sender's public key]

Explanation:

Signed with the sender's private key, verified with the sender's public key.

18.  
Which system handles monthly salary credits and EMI debits in bulk?

Correct Answer: D [NACH]

Explanation:

NACH – bulk and repetitive.

19.  
IFSC ABCD0567890 – which part identifies the branch?

Correct Answer: E [567890]

Explanation:

4 bank + 0 + 6 branch.

20.  
Which pair is wrongly matched?

Correct Answer: A [IMAP – Internet Mail Access Protocol]

Explanation:

IMAP = Internet Message Access Protocol.

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