Week 6

Question 1

What is goto statement equivalent to in assembly language?

Answer 1

Jump

It unconditionally transfers control to a statement other than the next one.

Question 2

Why has goto been discouraged in modern HLL programming?

Answer 2

it can be replaced by control structures which support structured programming.

Question 3

What is an address?

Answer 3

It’s a number giving the location of some info in memory

Question 4

What is a label?

Answer 4

It’s used in assembly language as a symbolic name of an address

Question 5

What are conditional jumps?

Answer 5

JUMPF and JUMPT

Question 6

What are some common control constructs in HLLs?

Answer 6

for loops, while loops, if then else structures

Question 7

How do you translate the if-statement in a HLL to assembly language:
x=2;
if(y>x){a=5;}
b=6;

Answer 7

See lecture 6.3

Question 8

How do you translate the if-then-else HLL statement to assembly language?

x=2;
if(y>x){a=5}
else{c=7}
b=6;

Answer 8

See lecture 6.3

Question 9

Are while and for loops bounded or unbounded iterations?

Answer 9

In modern HLLs, while statements are unbounded. For loops are bounded.

Question 10

How can we turn while and for loops into assembly language?

Answer 10

By using goto statements.