Consider the following memory-mapped register code: Figure from the original question paper What are the access sizes of the Figure from the original question paper and Figure from the original question paper registers, respectively?

(A) is 4-byte, and is 1-byte. (A figure from the original paper is missing from the source site.)

(B) Both registers are 1-byte. (A figure from the original paper is missing from the source site.)

(C) Both registers are 4-byte. (A figure from the original paper is missing from the source site.)

(D) is 1-byte, and is 4-byte. (A figure from the original paper is missing from the source site.)

What will be the output behavior of the following xv6 code snippet? Figure from the original question paper

(A) Only will be printed. (A figure from the original paper is missing from the source site.)

(B) Only will be printed. (A figure from the original paper is missing from the source site.)

(C) Both lines will be printed, but the order is non-deterministic. (A figure from the original paper is missing from the source site.)

(D) Parent always prints first, then child. (A figure from the original paper is missing from the source site.)

Operating Systems Quiz 1: 15 March 2026 (January 2026 term)

Question 1

+3 marksOne correct option

If the memory map for a device starts from the offset 0x40002000 and has a size of 4096 bytes in a 32-bit addressing scheme, what will be the last address in the memory map?

A
0x40003000
B
0x40002EFF
C
0x40001FFF
D
0x40002FFF

Question 2

+3 marksOne correct option

Consider the following memory-mapped register code:

What are the access sizes of the

and

registers, respectively?

A
is 4-byte, and is 1-byte.
(A figure from the original paper is missing from the source site.)
B
Both registers are 1-byte.
(A figure from the original paper is missing from the source site.)
C
Both registers are 4-byte.
(A figure from the original paper is missing from the source site.)
D
is 1-byte, and is 4-byte.
(A figure from the original paper is missing from the source site.)

Question 3

+3 marksOne correct option

What will be the output behavior of the following xv6 code snippet?

A
Only will be printed.
(A figure from the original paper is missing from the source site.)
B
Only will be printed.
(A figure from the original paper is missing from the source site.)
C
Both lines will be printed, but the order is non-deterministic.
(A figure from the original paper is missing from the source site.)
D
Parent always prints first, then child.
(A figure from the original paper is missing from the source site.)

15 more questions in this paper

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More on the Operating Systems Quiz 1 15 Mar 2026 paper

The IIT Madras BS Operating Systems (Operating Systems) Quiz 1 paper sat on 15 Mar 2026, in the January 2026 term: 18 questions for 50 marks in 120 minutes. The first 3 questions are below. Sign in with Google — it is free — to see the whole paper with its answers and explanations, in learning mode or as a timed mock test.

Feature	Operating Systems Quiz 1 15 Mar 2026 at a glance
Term	January 2026 term
Subject	Operating Systems
Course code	BSCS4022
Questions	18
Marks	50
Duration	120 min
MCQ	16
MSQ	2
Negative marking	No negative marking.
Updated	25 Sept 2026

Operating Systems Quiz 1: 15 March 2026 (January 2026 term)

Question 1

Question 2

Question 3

15 more questions in this paper

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