Computer System Overview Questions and Answers for Competitive Exams
Computer System Overview Questions asked often in SSC, bank and other competitive exams. So, students should practice these Computer System Overview Questions and answers for competitive Exams.
Here are very useful or selective Computer System Questions and answers from which students can easily increase their performance in computer awareness section. Try to solve these basic Computer System Questions yourself and increase your confidence in this section.
You can read also Computer Questions and Answers for better performance in competitive exams.
Computer System Overview Questions and Answers:
Q.1 How many modes of operation are there in 8255 PPI?
(A) 1
(B) 2
(C) 3
(D) 4
Ans . C
Q.2 The RST 5.5 Interrupt Service routine starts from location.
(A) 0020 H
(B) 0024 H
(C) 0028 H
(D) 002C H
Ans . D
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Q.3 If instruction RST is written in a program the problem will jump to location.
(A) 0020 H
(B) 0024 H
(C) 0028 H
(D) 002C H
Ans . C
Q.4 SN 7410 IC is a ….
(A) Triple 3 input NAND gate
(B) 2 input NAND gate
(C) Triple 3 input NAND with open collector
(D) None of these
Ans . A
Q.5 Microprocessor 8085 is enhanced version of …. With essentially the same construction set.
(A) 6800
(B) 68000
(C) 8080
(D) 8000
Ans . C
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
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Rajesh Bhatia
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