Computer Quiz – Computer System Overview @ 10,11th Jan 2019

Q.6 If interrupt service requests have been received from all of the following interrupts, then which one will be service first?

(A) RST 5.6

(B) RST 6.5

(C) RST 7.5

(D) None of these

Ans .  C

Q.7 How many I/O ports can be accessed by memory mapped method?

(A) 3

(B) 256

(C) 32 k

(D) 64 k

Ans .  C

Q.8 Which of the following are not vectored interrupt?

(A) RST 5.5

(B) RST 6.5

(C) RST 7.5

(D) INTR

Ans .  D

Q.9 How many and what are the machine cycles needed for execution of XTHL?

(A) 1, Fetch

(B) 3, Fetch, Memory read and write

(C) 4, Fetch, 2 memories read and 2 memories write

(D) 5 fetches, 2 memories read 2 memories write

Ans .  D

Q.10 Which of the following interrupts has the lowest priority?

(A) RST 6.5

(B) RST 7.6

(C) TRAP

(D) INTR

Ans .  D

Leave a Reply

Your email address will not be published. Required fields are marked *