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- 1. Multiple Choice
In MIPS, which of the following is used when calling a function?
jal
sb
add
li
- 2. Multiple Choice
In MIPS, how are arguments by convention passed to a function?
They are stored in the stack
They are stored in registers
$a0–$a3They are stored in the data segment
They are stored in registers
$t0–$t3 - 3. Multiple Choice
In MIPS, which register is by convention used to store the return value of a function?
$v0$a0$t0$s0 - 4. Multiple Choice
By convention, what is the primary difference between the
$tregisters and$sregisters in MIPS?$t: used for arithmetic operations$s: used for logical operations$t: stores function arguments$s: stores temporary values$t: may not be preserved across function calls$s: preserved across function calls$t: used for data transfers$s: used for arithmetic and logical operations - 5. Multiple Choice
In MIPS, how do you access the second element of a 32-bit integer array stored in memory?
(The memory address of the array is stored in
$s0.)lw $t0, 2($s0)la $t0, 4($s0)lw $t0, 4($s0)lb $t0, 8($s0) - 6. Multiple Choice
In MIPS, how would the
wamfield be accessed?(The memory address of the struct is stored in
$s0.)lw $t0, 18($s0)lw $t0, 20($s0)lw $t0, 19($s0)lw $t0, 16($s0) - 7. Multiple Choice
In MIPS, which registers are used to store the result of
mult?$hi
$mul
$lo$v0
- 8. Multiple Choice
After executing this, what are the contents of
$loand$hi?$lo= 3$hi= 10$lo= 10$hi= 3$lo= 30$hi= 100$lo= 100$hi= 30 - 9. Multiple Choice
What does this do?
Calculate the sum of
$t0and$t1Calculate the product of
$t0and$t1Increment
$t0until it's equal to$t1Decrement
$t0until it's equal to$t1 - 10. Multiple Choice
What is the result of
0b1010 & 0b1100?· · ·
0b10100b11000b10000b1000b11000b10 - 11. Multiple Choice
What is the result of
0b1111 | 0b0011?· · ·
0b11110b00110b11110b00110b11100b111 - 12. Multiple Choice
What is the result of
0b1010 ^ 0b1100?· · ·
0b10100b11000b10100b11000b01100b0101 - 13. Multiple Choice
Given an integer
x, how can you check if itsnth bit is set (1) or unset (0)?x & (1 << n)x | (1 << n)x ^ (1 << n)x << (1 << n) - 14. Multiple Choice
What is the basic format of an IEEE 754-1985 single-precision floating point number?
(Mantissa means the fraction component.)
Sign (1 bit)
Exponent (8 bits)
Mantissa (23 bits)
Sign (1 bit)
Exponent (11 bits)
Mantissa (52 bits)
Sign (1 bit)
Exponent (4 bits)
Mantissa (27 bits)
Sign (1 bit)
Exponent (5 bits)
Mantissa (26 bits)
- 15. Poll
You may need some working out space for the next one.
https://cgi.cse.unsw.edu.au/~cs1521/22T3/topic/floating_point/slides
OK!
🤷♀️
- 16. Fill in the Blank
🔥🔥🔥 😈😈😈 🔥🔥🔥
Convert the decimal number
10.25
to its IEEE 754-1985 single-precision binary representation.
- 17. Poll
Convert the decimal number 10.25 to its IEEE 754-1985 single-precision binary representation.
· · ·
Step 1: Convert the integer part (10) to binary.
10 = 0b1010
· · ·
Step 2: Convert the fractional part (0.25) to binary.
0.25 = 1/4 = 1/(2²) = 0b0.01
· · ·
Step 3: Combine them.
0b1010 + 0b0.01 = 0b1010.01
· · ·
Step 4: Normalise the binary representation by moving the point to the front.
0b1010.01 = 0b1.01001 × 2³
As it was moved three positions to the left, the exponent is 3.
· · ·
Step 5: Add the bias to the exponent (127 for single-precision floating point numbers).
exponent = 3 + bias = 3 + 127 = 130 = 0b10000010
· · ·
Step 6: Combine the sign bit, exponent and mantissa.
sign bit (positive) = 0
exponent (using 0b10000010 above) = 10000010
mantissa (using 0b1010.01 above; the first 1 is implicit; add 0s to make 23 digits) = 01001000000000000000000
∴ 0 10000010 01001000000000000000000
OK!
😵💫
- 18. Multiple Choice
How many bytes does a valid UTF-8 encoded code point occupy?
1 byte2 bytes4 bytes
It depends
- 19. Multiple Choice
How many bytes are used to represent a single ASCII character in UTF-8 encoding?
1 byte
2 bytes
4 bytes
It depends
- 20. Multiple Choice
Given a UTF-8 encoded string in C, how would you determine the number of characters in the string?
Use the
strlenfunctionIterate through it, count the number of bytes, then divide by 4
Iterate through it while checking bytes for valid UTF-8 starting sequences
Convert it to UTF-16, then count the number of characters
- 21. Poll
The layout of UTF-8
OK!
😵💫
- 22. Multiple Choice
Which of the following binary representations are not valid UTF-8 encoding sequences?
11000010 1010000111100011 10110000 101011011000000011011011 10101111 11011111 10101111 - 23. Multiple Choice
What is the purpose of an inode in a UNIX filesystem?
It stores file data
It maintains a list of file names within a directory
It's a security feature
It stores file metadata (permissions, timestamps, etc.)
- 24. Multiple Choice
What is a file descriptor?
A unique integer assigned to each file opened by a process
A type of file format such as .doc or .pdf
A special data structure used for file operations
The size of the file in bytes
- 25. Multiple Choice
Which of the following is true?
A symbolic link contains the path to another file or directory, whereas a hard link points to its inode
A symbolic link can only point to a file or directory within the same filesystem, whereas a hard link can span across different filesystems
A symbolic link can be created only by the superuser, whereas a hard link can be created by any user
A symbolic link duplicates the file's content, whereas a hard link shares the same content
- 26. Multiple Choice
In C, how can you check whether or not a file exists before accessing it?
Using the
file_existsfunctionChecking the return value of the
fopenfunctionChecking the file size
It's not possible to check for file existence before access in C
- 27. Multiple Choice
FILE *f = fopen("data.txt", "r");· · ·
Which of the following sets the file position indicator to the 100th byte of the file?
(Assume the file exists and contains valid data.)
fseek(f, 99, SEEK_SET);fseek(f, 100, SEEK_CUR);fseek(f, 100, SEEK_END);fseek(f, -99, SEEK_SET); - 28. Multiple Choice
If
data.txtwas created byecho abc > data.txt, what does this output?EOF
c
A runtime error because the
fseekfunction is used incorrectly\0
- 29. Multiple Choice
What does this print?
"Hello, world!" three times, followed by "Hi there!" five times, in that exact order
Sometimes "Hello, world!" three times, followed by "Hi there!" five times, and other times "Hi there!" five times, followed by "Hello, world!" three times
"Hello, world!" three times and "Hi there!" five times, but the order of each line is not guaranteed
Nothing as it doesn't compile
- 30. Multiple Choice
Which of the following causes a deadlock?
(There is only one correct answer.)
- Answer choicesTagsAnswer choicesTags