exam MCQ ✅ 20 code-based questions (focus on flags, registers… — اللجنة العلمية–قسم الهندسة الطبية الحيوية–المستوى الرابع — TG.ME

exam MCQ ✅ 20 code-based questions (focus on flags, registers, instructions like MOV, ADD, MUL, CALL, RET, etc.) ✅ 10 theory questions from the first lectures (interrupts, segments, flags, registers, etc.) Questions (Multiple Choice) Q1. Which interrupt is used for DOS services? [ ] INT 10h [✔️] INT 21h [ ] INT 20h [ ] INT 1Ah Q2. What is the size of the 8086 address bus? [✔️] 20 bits [ ] 16 bits [ ] 8 bits [ ] 32 bits Q3. Which register type stores flags? [ ] AX [ ] BX [✔️] Status Register [ ] Code Segment Q4. What is the function of the CALL instruction? [✔️] Push IP and jump to procedure [ ] Return from procedure [ ] Push data to stack [ ] Compare values Q5. Which segment handles instructions? [✔️] Code Segment [ ] Data Segment [ ] Stack Segment [ ] Extra Segment Q6. What does the LEA instruction load? [✔️] Effective address [ ] Immediate value [ ] Data [ ] Flags Q7. Which flag is set when signed overflow occurs? [✔️] OF [ ] CF [ ] ZF [ ] SF Q8. Which instruction returns from a procedure? [✔️] RET [ ] CALL [ ] JMP [ ] PUSH Q9. What is the difference between CALL and MACRO? [✔️] Macro expands inline, CALL uses stack [ ] CALL is faster than Macro [ ] Macro uses stack [ ] CALL expands code Q10. What does the JNE instruction check? [✔️] ZF = 0 [ ] ZF = 1 [ ] CF = 1 [ ] SF = 1 💻 Code-Based Questions (Multiple Choice) Q11. MOV AX, 0025h MOV BX, 00FFh MUL BX Result in DX:AX? [✔️] 0000:24DBh [ ] 0001:24DBh [ ] 24DBh:0000 [ ] 0000:25FFh Q12. MOV AX, 00FFh DIV 10h What are the values in AL and AH? [✔️] AL = 0Fh, AH = 0Fh [ ] AL = FFh, AH = 00h [ ] AL = 10h, AH = 00h [ ] AL = 00h, AH = FFh Q13. MOV AX, 0024h ADD AX, CB11h Which flags are affected? [ ] ZF, CF [✔️] OF, SF [ ] None [ ] ZF only Q14. MOV AX, 00FFh INC AX Which flags will be set? [✔️] None (ZF=0, CF=0, OF=0, SF=0) [ ] CF=1 [ ] ZF=1 [ ] OF=1 Q15. MOV AX, 0000h MOV BX, 4011h ADD AX, BX ADD BX, AX Final value in BX? [✔️] 8022h [ ] 4011h [ ] 0000h [ ] 2000h Q16. CMP AX, BX JL LessLabel Jump occurs when: [✔️] SF ≠ OF [ ] ZF = 1 [ ] SF = OF [ ] CF = 1 Q17. CMP AX, BX JG GreaterLabel Jump occurs when: [✔️] ZF = 0 and SF = OF [ ] ZF = 1 [ ] SF ≠ OF [ ] CF = 1 Q18. MOV AX, 00FFh MOV BX, 0001h ADD AX, BX Which flag is affected? [✔️] None [ ] ZF [ ] OF [ ] CF Q19. CALL Procedure What does this instruction do? [✔️] Pushes IP and jumps to procedure [ ] Pops IP and returns [ ] Pushes AX [ ] Jumps without saving Q20. RET What does this instruction do? [✔️] Pops IP and returns to caller [ ] Pushes IP [ ] Ends program [ ] Jumps to procedure