Bangladesh Bank Assistant Maintenance Engineer Exam: 2011প্রশ্ন ও সমাধান
- Set by
- Bangladesh Bank
- Post
- Assistant Maintenance Engineer
- Exam date
- 2011
- Questions
- 5 (5 MCQ, 0 written)
- Exam guide
- Bank IT jobs · ব্যাংকের আইটি চাকরি
- Computer Architecture · কম্পিউটার আর্কিটেকচার 3
- General ICT · সাধারণ আইসিটি 2
Who among the following is associated with the invention of computer?
- a)Edison
- b)Babbage
- c)Mac Millen
- d)Rangabhashyam
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Which is the best choice of specification for a video card?
- a)AGP
- b)SCSI
- c)PGA
- d)SCASI
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What are the four key functions of a computer system?
- a)input, processing, output & storage
- b)keyboard, display, memory & disk drive
- c)bits, bytes, words & OSI
- d)word processing, spreadsheets & database
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IRQ1 is commonly assigned to ______
- a)It's usually open
- b)System timer
- c)Real time clock
- d)Keyboard (correct answer)
Answer and explanation
Correct answer: (d) Keyboard
In the standard IBM PC/AT interrupt layout (two cascaded 8259 interrupt controllers), each hardware line has a fixed job. IRQ1 belongs to the keyboard controller: every key press or release raises IRQ1, which the CPU services through interrupt vector 09h to read the scan code. This assignment is fixed, so IRQ1 is never free for add-in cards.
Why the other options are wrong
- (a) It's usually open: IRQ1 is permanently used by the keyboard. Lines that are commonly free are ones like IRQ 10 or 11, not IRQ1.
- (b) System timer: The system timer uses IRQ0, the highest-priority line.
- (c) Real time clock: The real-time clock (CMOS RTC) uses IRQ8, on the second (slave) controller.
Tip: IRQ0 timer, IRQ1 keyboard, IRQ2 cascade, IRQ6 floppy, IRQ8 RTC, IRQ14 primary IDE.
Source: IBM PC hardware interrupt table (Yale FLINT BIOS reference)
From what location are the 1st computer instructions available on boot-up?
- a)ROM BIOS
- b)CPU
- c)boot.ini
- d)CONFIG.SYS
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Question text is from the public recruitment exam; answers and explanations are written by ARBS Academy. All past papers · Bank IT jobs guide