COS2621 Latest exam pack questions and answers and summarized notes for exam preparation. Updated for 2024 exams . For assistance Whats-App.0.6.7..1.7.1..1.7.3.9 . All the best on your exams!!
INSTRUCTIONS
1. Answer all questions on word document/answer sheet, convert to pdf before submitting
2. The mark for each question is given in brackets next to the question.
3. The appendix contains a list of x86 Assembly Language instructions
ALL THE BEST!
1
, COS2621
2 Oct/Nov 2021
Question 1: General knowledge [30]
Choose from alternatives (1) to (5) the correct one. Each question counts 2 marks.
a). The exists in one of two states and, in the absence of input, remains in that state.
(1) compiler, linker and loader
(2) assembler, assembler
(3) assembler, utility to assemble and debug programs
(4) translator, interpreter
(5) compiler, assembler
d). Consider the following assembly language program fragment:
org 0x100
label1: dw 0x76EF
nop
mov ax,ax
nop
Which one of the following statements is true?
(1) 76h is stored in position 101h and EFh is stored in position 100h.
(2) 76h is stored in position 100h and EFh is stored in position 101h.
(3) 67h is stored in position 101h and EFh is stored in position 100h.
(4) 67h is stored in position 100h and EFh is stored in position 101h.
(5) None of the above.
, COS2621
3 Oct/Nov 2021
e). Which number will be stored in the AX register if we key in the following instruction (exactly as it is) and
assemble it by using (i) NASM, and (ii) DEBUG?
mov ax,0024
(1) (i) AX = (0024)16 (ii) AX = (0024)16
(2) (i) AX = (0024)10 (ii) AX = (0024)10
(3) (i) AX = (0024)16 (ii) AX = (0024)10
(4) (i) AX = (0024)10 (ii) AX = (0024)16
(5) None of the above.
f). A logical cache stores data using _.
(1) physical addresses
(2) virtual addresses
(3) random addresses
(4) both (1) and (3)
(5) direct addresses
g). Consider the following pseudo-ops (use NASM):
org 0x100
db 'Q'
dw 213h
db 15
In which relative memory location will (i) 51h and (ii) (15)10 respectively be stored?
(1) (i) 0000h (ii) 0003h
(2) (i) 0002h (ii) 0002h
(3) (i) 0003h (ii) 0001h
(4) (i) 0001h (ii) 0002h
(5) None of the above.
h). Suppose a machine has twelve (12) general-purpose 32-bit registers. How many bits must be reserved in
the machine code instruction in order to address any one of these twelve registers?
(1) 1
(2) 2
(3) 3
(4) 4
(5) 5
i). Which one of the following instructions would you use if you want to branch to the label TEST if the
sign flag is set?
(1) JN TEST
(2) JZ TEST
(3) JS TEST
(4) JNS TEST
(5) JNP TEST
j). Which of the following are characteristics of Blu-ray DVDs?
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller iStudy. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $2.85. You're not tied to anything after your purchase.
