CS401 Midterm MCQs by Talha Sajid

Q1. . The ASCII code for digit 8 is _________.

1. 0x80
2. 0x18
3. 0x38
4. 0x28

Correct answer: 0x38

Q2. . The first instruction of “COM” file must be at offset:

1. 0x0010
2. 0x0100
3. 0x1000
4. 0x0000

Correct answer: 0x0100

Q3. The main difference between standard and extended ASCII tables is the number of defined ___________.

1. serial ports
2. rows and columns on VGA
3. I/O ports
4. Symbols

Correct answer: Symbols

Q4. The execution of the instruction “mov word [ES : 0], 0x0741” will print character “A” on screen , background color of the screen will be

1. Black (Page 81)
2. White
3. Red
4. Blue

Correct answer: Black (Page 81)

Q5. After the execution of STOSB and STOSW, the CX register will be ______________ by

1. decremented, 1
2. incremented, 2
3. incremented, 1
4. decremented, 2

Correct answer: decremented, 1

Q6. The iAPX888 architecture consists of _______ register.

1. 12
2. 14
3. 16
4. 18

Correct answer: 16

Q7. In iAPX88, when an element is popped from the stack, SP is ___________________ by 2.

1. incremented
2. divided
3. multiplied
4. decremented

Correct answer: incremented

Q8. One screen location corresponds to a

1. Byte
2. Word
3. Double byte
4. Double word

Correct answer: Word

Q9. The symbols in extended ASCII table by IBM fits in one ______________.

1. byte
2. word
3. doubleword
4. bit

Correct answer: byte

Q10. When an item is pushed on the decrementing stack, the top of the stack is

1. First decremented and then element copied on to the stack
2. First incremented and then element copied on to the stack
3. Decremented after the element copied on to the stack
4. Incremented after the element copied on to the stack

Correct answer: First decremented and then element copied on to the stack

Q11. Which of the following is a non-destructive AND operation?

1. CMP
2. ADC
3. NAND
4. TEST

Correct answer: TEST

Q12. one Each screen location corresponds to a word, the lower byte of this word contains____

1. The character code
2. The attribute byte
3. The parameters
4. The dimensions

Correct answer: The character code

Q13. ASCII stands for_______.

1. American Standard Code for Information Interaction
2. American Standard Code for Information Interchange
3. American Scientific Communication for Integer Interaction
4. American Standard Communication for Integer Interchange

Correct answer: American Standard Code for Information Interchange