Quiz on Textbook Sections 2.9 to 2.14, 2.17, 2.19

Q1: Which of the following statements about characters and strings in C and Java is true? 
Solution: A string in C takes about half the memory as the same string in Java.

Q2: If memory address 0x0000000000000020 contains the doubleword 0x8786858483828180, what value is loaded into register x9 by the following instruction?

lb  x9, 0x21(x0)

Recall that RISC-V uses little-endian addressing.
Solution: 0xffffffffffffff81
 
Q6: When do you use primitives like load reserved and store conditional? 
Solution: 

1. When cooperating threads of a parallel program need to synchronize to get proper behavior for reading and writing shared data
2. When cooperating processes on a uniprocessor need to synchronize for reading and writing shared data

Q8: Using pointers in C usually gives better performance than using arrays. 
Solution: False

Q9: How many bytes are used to encode x86 instructions? 
 Solution: From 1 to 15 bytes
 
Q10: It is generally best to write programs in a high level language, since they're more intelligible and maintainable, and a compiler can generate more efficient code than an assembly language programmer. 
Solution: True