软件测试类英文笔试题
1. What will be the output of the follow C code?
define product(x) (x*x)
main()
{
int i = 3, j, k;
j = product(i++);
k = product(++i);
printf("%d %d",j,k);
}
2. Simplify the following Boolean expression!((i ==12) || (j > 15))
3. How many flip-flop circuits are needed to divide by 16?
4. Provides 3 properties that make an OS, a RTOS?
5. What is pre-emption?
6. Assume the BC register value is 8538H, and the DE register value is 62A5H.Find the value of register BC after the following assembly operations:
MOV A,C
SUB E
MOV C,A
MOV A,B
SBB D
MOV B,A
7.In the Assembly code shown below
LOOP: MVI C,78H
DCR C
JNZ LOOP
HLT
How many times is the DCR C Operation executed?
8.Describe the most efficient way(in term of execution time and code size) to divide a number by 4 in assembly language
9.what value is stored in m in the following assembly language code fragment if n=7?
LDAA #n
LABEL1: CMPA #5
BHI L3
BEQ L2
DECA
BRA L1
LABEL2: CLRA
LABEL3: STAA #m
10. What is the state of a process if a resource is not available?
define a 365*24*60*60
11. Using the #define statement, how would you declare a manifest constant that returns the number of seconds in a year? Disregard leap years in your answer.
12. Interrupts are an important part of embedded systems. Consequently, many compiler vendors offer an extension to standard C to support interrupts.Typically, the keyword is __interrupt. The followingroutine (ISR). Point out problems in the code.__interrupt double compute_area (double radius)
{
double area = PI * radius * radius;
printf(" Area = %f", area);
return area;